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Status of, and threats to, the Ganges River Dolphin (Platanista gangetica) in the Koshi River, Nepal
Author
Sunita Chaudhary M. Sc Management of Protected Areas
University of Klagenfurt, Austria Email: sntchaudhary@yahoo.com
Supervisor
Dr. Kalemani Jo Mulongoy Principal Officer
Director of the Scientific, Technical and Technological Matters Division Secretariat of the Convention on Biological Diversity (CBD)
Montreal, Canada Email: jo.mulongoy@cbd.int
Carried out at
Department of Economics University of Klagenfurt Universitätsstraße 65-67 9020 Klagenfurt, Austria
Phone No: +43 (0) 463/27 00 4192 Email: mpa@uni-klu.ac.at
Klagenfurt, June 2007
Supported by
Austrian Exchange Service (ÖAD) Academic Cooperation and Mobility Unit
Wien, Austria
&
The Rufford Small Grants Foundation Babmaes House London
United Kingdom
Technical support from
WWF Nepal Kathmandu, Nepal Tel: +977 1 44 34820 Fax: +977 1 4438458
Email: info@wwfnepal.org
Citation: Chaudhary, S. 2007. Status of, and Threats to, the Ganges River Dolphin (Platanista gangetica) in the Koshi River, Nepal. A Thesis submitted for partial fulfilment of a Master of Science in Management of Protected Areas, University of Klagenfurt, Austria.
DECLARATION OF HONOR
I herewith declare that I am the sole author of the current master thesis according to art. 51 par. 2 no. 8
and art. 51 par. 2 no. 13 Universitätsgesetz 2002 (Austrian University Law) and that I have conducted all
works connected with the master thesis on my own. Furthermore, I declare that I only used those
resources that are referenced in the work. All formulations and concepts taken from printed, verbal or
online sources- be they word-for-word quotations or corresponding in their meaning – are quoted
according to the rules of good scientific conduct and are indicated by footnotes and in the text of detailed
references.
Support during the work including significant supervision is indicated accordingly.
The master thesis has not been presented to any other examination authority. The work has been
submitted in printed and electronic form. I herewith confirm that the electronic form is completely
congruent with the printed version.
I am aware of legal consequences of a false declaration of honor.
Klagenfurt, 1 June 2007 Signature:
ACKNOWLEDGEMENT
I would like to express my sincere gratitude to all those who gave me possibility to complete this
thesis. I would first of all like to thank the Austrian Exchange Service (ÖAD) for granting me a
scholarship that allowed me to pursue this programme for a degree of Master of Science in
Management of Protected Areas (MPA) at the University of Klagenfurt, Austria.
I want to thank the members of Management Committee of the MPA programme who supported me
during the whole course and encouraged me to go ahead with my thesis. Furthermore, I would like to
express gratitude to the Department of National Parks and Wildlife Conservation (DNPWC),
Government of Nepal and the Koshi Tappu Wildlife Reserve (KTWR) for giving me permission to carry
out the research in the Koshi Tappu Wildlife Reserve, Nepal.
I acknowledge with gratitude the generous financial support from the Rufford Maurice Laing
Foundation, United Kingdom that allowed me to carry out the study. I would also like to acknowledge
the support of the World Wildlife Fund Nepal (especially Ms. Neera Shrestha Pradhan and Mr. Dipesh
Joshi) for providing technical advice for the field work. Furthermore, I would like to thank Convention
on the Conservation of Migratory Species of Wildlife Animals (CMS), Secretariat provided by the United
Nations Environment Programme (UNEP) for supporting my work and encouragement.
I am deeply indebted to my Supervisor Dr. Kalemani Jo Mulongoy from the Secretariat of the
Convention on Biological Diversity (CBD), Montreal Canada for his help, stimulating suggestions,
remarks, editing and continuous encouragement through out the preparation and drafting of this
thesis. My sincere thanks go also to Dr. Sarat Babu Gidda from the Secretariat of the Convention on
Biological Diversity, Montreal Canada for his useful comments.
I am deeply obliged to the World Wildlife Fund Nepal, more specifically to my local supervisor Mr.
Dipesh Joshi for his guidance, comments and support during the research period; Mr. Gokarna Jung
Thapa for providing me the required Geographic Information System maps; Ms. Pabitra Jha for her
assistance and encouragement during the field work and secondary data collection; Mr. Somesh Das
for his help and constant support during my study period; Mr. Naveen Mahato for his suggestions and
Mrs. Lisbeth Zechner for her technical help during the field work in Nepal.
The survey would not have been possible without the cooperation of the Koshi Tappu Wildlife Reserve
staff, especially Mr. Barna Bahadur Thapa; the Koshi Camp staff, in particular, Mr. Badri Chaudhary,
Mr. Anis and Mr. Rajiya; the Participatory Conservation Programme (PCP) and local individuals
interviewed. I would like to thank them all for their help, precious time during the field survey and for
sharing their knowledge on the Koshi River Dolphins.
Especially, I would like to give my cordial thanks to my beloved parents and family members for their
continuous support and inspiration through out the study period. I would also take an opportunity to
thank the participants of the MPA programme for making my participation in the course pleasant and
memorable.
EXECUTIVE SUMMARY
Globally the Ganges River Dolphin (Platanista gangetica) is listed by IUCN-the World Conservation
Union as endangered. In Nepal, this dolphin is critically endangered as a result of dam construction,
other types of habitat manipulations, water pollution and adverse human activities. This dolphin
species is ecologically considered important for its key role in indication of healthy river ecosystems
and availability of clean water for the people living around. It is protected by law in Nepal. Information
on the status of its population in the Koshi River is scanty but needed for the development of a
strategy to halt its loss and if possible to revert its trend. This limited information is a major constraint
for the protection and conservation of this endangered mammal. The dolphin status in the Koshi River
is a matter of concern and there is an urgent need to update information on its current status.
In order to address this information gap, a dolphin population survey was carried out in the
mainstream of the Koshi River in Nepal. The hotspot and potential sites of dolphins in the Koshi River
were identified and mapped to make suggestions for their protection. The threats both direct and
indirect to the reduction of dolphins were identified at the local and national level. The need of
integrating identified hotspot of dolphin into the Koshi Tappu Wildlife Reserve was assessed as a way
to provide and strengthen the protection of the dolphins. Information was gathered using Participatory
Rural Appraisal Tools mainly through Focus Group Discussion and Key Informants Survey, and review
of literature. A direct count method and synchronized survey were conducted for assessing the dolphin
population.
During the present study no dolphins were sighted in the river section North of the Koshi Barrage.
However, the local people recalled the occurrence of one or two dolphins, indicating a decrease in the
dolphin population in the last decade in the river section North of the barrage. In the river section
South of the barrage, a total population of 15 individuals was counted within a distance of 2
kilometers downstream of the barrage. The present study identified the southern section of the Koshi
Barrage as the hotspot and Chatara, Rajabas, Kushaha and the Third Tower areas as the potential
sites of the dolphins in the Koshi River system. The Koshi Barrage area is subjected to severe
anthropogenic stresses causing pronounced habitat degradation in the area. The Koshi Barrage is
posing to upstream river dolphins a severe threat, which has prevented the migration of the dolphins
from downstream barrage and has increased the vulnerability of dolphins. The degradation of habitat
accompanied by intensive fishing, fish poisoning, and water pollution are also posing threats to the
Koshi dolphins. Ineffective law enforcement and lack of awareness of the endangered status of the
river dolphins among local people has also contributed to the population decline of the dolphins in the
Koshi River in Nepal.
Without an immediate and concerted conservation effort, P. gangetica will almost certainly become
extinct locally and may be nationally in the near future. Single piece meal protection efforts may not
be enough for the conservation of this species in the Koshi River. An integrated ecosystem approach
should be adopted not only relying on legislation or focusing on the river dolphins and their habitats
but also maximizing economic and social wellbeing in a sustainable manner is needed to protect the
remnant Koshi dolphin population. Integrating the southern section of the Koshi Barrage identified as
a hotspot into the buffer zone area of the Koshi Tappu Wildlife Reserve could be an option for
protection of dolphins. The area should be conserved and managed under the Buffer Zone
Management Regulations of Nepal. A sustainable ecotourism, incorporating all tourist attractions of the
area should be implemented in coordination with the local community and the Koshi Tappu Wildlife
Reserve. This could be an incentive for the local people in favour of dolphin conservation as well as for
community development. An ecosystem-based dolphin conservation action plan/strategy is an urgent
need in the country and should be developed at the earliest.
ACRONYMS
AAPA Aquatic Animal Protection Act
BZMC Buffer Zone Management Committee
CBD Convention on Biological Diversity
CBO Community Based Organization
CITES Convention on International Trade in Endangered Species of Wild Flora and
Fauna
CMS Convention on Migratory Species
DDC District Development Committee
DNPWC Department of National Parks and Wildlife Conservation
ENS Environment News Service
FAO Food and Agriculture Organization of the United Nations
GPS Global Positioning System
HMGN His Majesty’s Government of Nepal
INGO International Non-Governmental Organization
IUCN World Conservation Union
IUCN/SSC World Conservation Union/Species Survival Commission
Kg Kilogram
Km kilo meter
KTWR Koshi Tappu Wildlife Reserve
MFSC Ministry of Forests and Soil Conservation
MOPE Ministry of Population and Environment
MWR Ministry of Water Resources
NAST Nepal Academy of Science and Technology
NGO Non-Governmental Organization
NPWC National Parks and Wildlife Conservation
PA Protected Area
ppt Part per thousand
UC User Committee
UK United Kingdom of Great Britain and Northern Ireland
UNEP United Nations Environment Programme
UNEP United Nations Environment Programme
USAID United States Agency for International Development
VDC Village Development Committee
WCMC World Conservation Monitoring Centre
WWF World Wildlife Fund
TABLE OF CONTENTS
DECLARATION OF HONOR ......................................................................................................I
ACKNOWLEDGEMENT ........................................................................................................... II
EXECUTIVE SUMMARY........................................................................................................ III
ACRONYMS.......................................................................................................................... VI
TABLE OF CONTENTS..........................................................................................................VII
LIST OF FIGURES ...............................................................................................................VII
1. INTRODUCTION............................................................................................................. 1
1.1. Background..................................................................................................................... 1
1.2. General description and diet of the Ganges River Dolphin ................................................ 1
1.3. Habitat and distribution of the Ganges River Dolphin ....................................................... 2
1.4. Conservation status......................................................................................................... 3
1.5. Study significance ........................................................................................................... 3
1.6. Objectives of the study.................................................................................................... 4
2. STUDY AREA .................................................................................................................. 5
2.1. Limitations of the study ................................................................................................... 6
3. METHODS ...................................................................................................................... 8
3.1. Literature Review ............................................................................................................ 8
3.2. Reconnaissance survey.................................................................................................... 8
3.3. Key informant interviews................................................................................................. 8
3.4. Focus group discussion.................................................................................................... 9
3.5. Population survey............................................................................................................ 9
3.6. Email survey ................................................................................................................. 10
3.7. Data analysis ................................................................................................................ 10
4. RESULTS AND DISCUSSION......................................................................................... 11
4.1. Status and distribution of the Koshi River Dolphins ........................................................ 11
4.2. Hotspots of dolphins in the Koshi River of Nepal ............................................................ 13
4.3. Threats to Platanista g. gangetica in the Koshi River ...................................................... 16
4.3.1. Habitat loss and degradation ......................................................................... 16 4.3.2. Over exploitation of fisheries ......................................................................... 17 4.3.3. Pollution and poisoning ................................................................................. 19 4.3.4. Barrage and embankments ........................................................................... 20 4.3.5. Poaching and accidental death....................................................................... 22 4.3.6. Ineffective law enforcement .......................................................................... 22 4.3.7. Awareness .................................................................................................. 23
5. CONCLUSIONS............................................................................................................. 24
6. RECOMMENDATIONS/SUGGESTIONS........................................................................... 25
6.1. Hotspot of the river dolphins and the Koshi Tappu Wildlife Reserve ................................ 25
6.2. Conservation Education and Awareness ......................................................................... 25
6.3. Ecosystem Approach (Species and Habitat protection) ................................................... 26
6.4. Research and monitoring............................................................................................... 27
6.5. Effective law enforcement ............................................................................................. 27
6.6. Ecotourism.................................................................................................................... 28
6.7. Alternatives to unsustainable fishing.............................................................................. 28
7. REFERENCES................................................................................................................ 30
8. ANNEXES ..................................................................................................................... 37
8.1. Annex I: River Dolphin Sighting Sheet ........................................................................... 37
8.2. Annex II: Email questionnaire survey ............................................................................ 38
8.3. Annex III: Financial Statement ..................................................................................... 39
LIST OF FIGURES
Figure 1: Study area showing the surveyed route in the Koshi River .............................................. 7 Figure 2: Population of the river dolphins in the northern section of the Koshi Barrage ................... 11 Figure 3: An adult dolphin diving in the southern section of the Koshi Barrage............................... 12 Figure 4: Hotspots and potential sites of the river dolphins in the Koshi River system..................... 14 Figure 5: Percentages of people who indicated the main threats to the Koshi River Dolphins .......... 16 Figure 6: Illegal wood, thatch and grass collection from the Koshi Tappu Wildlife Reserve ............... 17 Figure 7: Fishing in the southern section of the Koshi Barrage ..................................................... 18 Figure 8: Gillnetting in the southern section of the Koshi Barrage................................................. 19 Figure 9: Bathing, washing and sewage disposal activities in the Koshi Barrage area...................... 20 Figure 10: Koshi Barrage built in 1963 on the Koshi River in eastern Nepal ................................... 21 Figure 11: Snout of a poached river dolphin in the Koshi River .................................................... 22
CHAUDHARY, Sunita
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1. INTRODUCTION
1.1. Background
There are at least 39 species of dolphins living in oceans and in different freshwater rivers and
estuaries worldwide (UNEP/CMS Secretariat, 2007). Out of these, four species live in the large rivers
in Southern Asia and South America: the Yangtze River Dolphin (Lipotes vexillifer), the Amazon River
Dolphin (Inia geoffrensis), the Ganges River Dolphin (Platanista gangetica), and the Indus River
Dolphin (Platanista minor) (IUCN, 2006). The Yangtze River Dolphin was declared functionally extinct
in December 2006 (The Baji.org Foundation, 2006). The Amazon River Dolphin is the largest of the
freshwater dolphins, and is found in northern and central South America (American Cetacean Society,
2004). The Ganges River Dolphin, which is in appearance very similar to the Indus River Dolphin
(Revees et al., 2002) is now the world’s second most endangered freshwater river dolphin after the
Indus River Dolphin which is endemic to Pakistan (Reeves et al., 2000).
River dolphins face several threats including fragmentation of rivers by dams and canals, depletion of
their food sources through over-fishing, loss of habitats and entrapment with nets and other fishing
gears. These threats have reduced their ranges, and their abundance has declined abruptly in recent
years (Reeves and Leatherwood, 1995).
1.2. General description and diet of the Ganges River Dolphin
The Ganges River Dolphin belongs to the family Platanistidae and the Order cetacea. It has a long thin
snout, rounded belly, stocky body and large flippers. It has a grey colour which becomes blemished
with its age. The Ganges River Dolphin has extremely small eyes resembling pinhole openings above
the mouth (Smith, 2002) and is considered blind as it lacks a crystalline eye lens. These blind dolphins
cannot breathe in the water and must surface every 30 to 120 seconds (Behera, 2006). Their flippers
are flexible and they use them to feel their way along and to probe the bottom of their habitats for
prey spending most of their time feeding and travelling solitarily (Smith, 1996). The length of the river
dolphin is in between 1.5 to 2.5 m with a weight between 70 to 90 kg (Jefferson et al., 1994).
The Ganges River Dolphin usually travels alone or in small groups, but as many as 3 to 10 individuals
have also been observed feeding in the same river section (Smith, 1993). They feed on several
species of fish and invertebrates such as prawns, clams, catfish, gobies and carp and possibly turtles
CHAUDHARY, Sunita
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and birds as well (Klinowska, 1991 and Culik, 2003). They usually run after dweller fishes and mud
fishes in shallow water with the help of their snout (Jefferson et al., 1994).
1.3. Habitat and distribution of the Ganges River Dolphin
Ganges River Dolphins share their habitat with other river species such as the endangered gharial
(Gavialis gangeticus), the mugger (Crocodylus palustris), the river otters (Lutrinae) and different
species of turtles and various freshwater fishes (Restrpo, 2000). They usually inhabit the main river
stream but may migrate locally to tidal waters during monsoon season. During hot and dry seasons,
they disappear from the areas of river systems where high temperatures and food limitations cause
conditions to be too severe (Aryal, 2003). Ganges River Dolphins are generally concentrated in
counter current pools below channel convergences and sharp meanders’ and above and below mid-
channel islands, bridge pilings and other engineering structures that cause snoring ((Smith et al.,
1998). Deltaic (brackish) waters are a major component of the total distribution range of the river
dolphins in the Ganges, Meghna and Karnaphuli. However, they generally occur in salinities less than
10 ppt, although they have been recorded in water as saline as 23 ppt (Smith et al., 2004). They
require productive and biotic tropical rivers to survive (Smith et al., 1998).
The Ganges River Dolphins, also known as Susu or Soans in Nepal, are distributed in the slowly
flowing waters of the Ganges, Brahmaputra, Meghna and Karnaphuli-Sangu rivers, from the foot of
the Himalaya downstream to the upper limits of the tidal zone in Bangladesh, Bhutan, India and Nepal
(Sinha, 2000). Their present range is fragmented and often restricted by dams and irrigation systems.
Reports indicate that, a few years ago, populations of the Ganges River Dolphin totalled about 4000 to
5000 individuals, and that recent censuses found only about 1200 to 1800 individuals in the entire
distribution range of the Ganges River Dolphin (Smith et al., 2004).
The dolphins were once abundant in Nepal distributed in the Karnali, Narayani, Mahakali and the Koshi
River (Jnawali and Bhuju, 2000). But the construction of dams and other water development projects,
intensive fishing, pollution and extensive human disturbances have decreased the abundance of the
Ganges River Dolphin, which is now restricted only to the Karnali and Koshi River systems (Shrestha,
1995). No dolphins have been recorded recently for the Mahakali River and sightings in the Narayani
River are occasional (Jnwali and Bhuju, 2000). A WWF-Nepal study on status and distribution of
dolphins in 2005-2006 found only 3 to 4 dolphins in the Karnali River (WWF Nepal, 2006).
CHAUDHARY, Sunita
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1.4. Conservation status
The Ganges River Dolphin is at the apex of the aquatic food chain and its presence in adequate
numbers is an indication of great biodiversity in the river systems and helps keep a balanced
ecosystem (Behera, 2007). It is categorized as endangered by IUCN, the World Conservation Union in
the IUCN Red Data Book in 2002 (IUCN, 2004). The World Wildlife Fund- WWF recognizes this species
as a flagship species for freshwater ecosystems. The Convention on International Trade in Endangered
Species of Wild Flora and Fauna- CITES has listed this species as a species endangered by trade in
Appendix I (CITES, 2005). The Ganges River Dolphin is legally protected throughout its range in
South-East Asia. In Nepal, it is protected by Section 10 of National Parks and Wildlife Conservation Act
1973 and is among 27 protected mammals in Schedule I (His Majesty Government of Nepal/HMGN,
1973).
1.5. Study significance
The population of the river dolphins is declining at an alarming rate and if the present trend continues,
there may be little time to save the endangered Ganges River Dolphins (Behera, 2006). It is,
therefore, important to regularly assess the status and trends of their populations, and design
strategies for their conservation and sustainable use. The endangered Ganges River Dolphin is the
only cetacean found in the rivers of Nepal which is now restricted to the Koshi and Karnali Rivers in an
isolated form (Shrestha, 2003). In the Koshi River, updated quantitative data on population,
distribution and size is scanty. No systematic status survey has been done to update information on
the river dolphin populations since a decade, and lack of updated information on dolphins in the Koshi
River was becoming a major constraint to the protection and management of this specific mammal at
the local and national levels.
CHAUDHARY, Sunita
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1.6. Objectives of the study
The general objective of the study was to update existing information on the Ganges River Dolphin
and contribute knowledge on its status and threats in the Koshi River of Nepal. The specific objectives
of the study were to;
1. Update information on population status and distribution in the Koshi River of Nepal;
2. Identify the hotspots1 of the Ganges River Dolphin in the Koshi River of Nepal;
3. Identify the threats posed to the life/survival of dolphins at the local and national levels;
4. Assess the need and opportunity of integrating, for enhanced protection, the hotspot of
dolphins into the Koshi Tappu Wildlife Reserve.
5. Provide suggestions/recommendations for effective protection of the dolphins focusing more
on integrated management perspective at the policy level.
1 A biodiversity hotspot is a biogeographic region that is both a significant reservoir of biodiversity and is
threatened with destruction(Conservation International: www.biodiversityhotspots.org )
CHAUDHARY, Sunita
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2. STUDY AREA
The Koshi River was chosen as the study area because the Ganges River Dolphin has been reported to
dwell in the Koshi River along with 2 species of Crocodile; Magar (Crocodylus palustris) and Gharials
(Gavialis gangeticus) and 10 species of freshwater turtles (DNPWC, 2000). The mainstream of the
Koshi River was more focused but different sections of the Koshi River were also surveyed in the
present study after consultation with local people, reserve staff and information collected during the
reconnaissance survey. The survey was started from Chatara (260 50’ 53’’ N and 870 09’ 01’’ E) and
was ended 2 km downstream of the Koshi Barrage (260 30’ 01’’ N and 860 54’ 19’’ E). The Figure 1
shows the surveyed route in the Koshi River of Nepal.
The Koshi River has a vast catchment area varied in nature, originating from glaciers and snow fed
lakes of eastern Himalayas, flowing through mid hills and discharging itself onto the alluvial plains of
lowlands in the eastern Nepal. It is the biggest river system of Nepal and flows for a length of 730 km
in the Nepalese section (Shrestha, 1990). It is also known as Sapta Koshi River as it has seven main
tributaries of the rivers Tamurkoshi, Arunkoshi, Dhudkoshi, Sunkoshi, Bhotekoshi and Indrawati. It is
the largest tributary of the River Ganges with a total drainage area of 86,900 sq. km between 850 20’
and 880 00’ (Shrestha, 1990) with an average flow of 1931 m3/sec (Rajbanshi, 2002).
The bottom of the river is gravely sandy with some rocks and boulders in certain places in Chatara and
algal growth and aquatic weeds in downstream region of the Koshi Tappu Wildlife Reserve of the river
(Shrestha, 2002). The Koshi River is changing its way every year and causes high flooding in the near
by areas. In the section of the Koshi Tappu Wildlife Reserve, the water temperature is normally in
between 170C to 240C and its pH in downstream (Barrage section) is in between 6.0-7.5 (Shrestha,
1990).
The Koshi River provides life to the Koshi Tappu Wildlife Reserve which is a protected area under IUCN
Category IV and has been declared as a Wildlife Reserve by National Parks and Wildlife Conservation
Act 1973, Government of Nepal. It is the smallest protected areas in Nepal, spread over 175 square
kilometers. The Reserve provides, however, the best opportunities for the conservation of many rare
and endangered species of plants, fish, herpetofauna, resident and migratory birds, and mammals
including the river dolphins. It is also a Ramsar site of international significance and Department of
National Parks and Wildlife Conservation (2000) has reported 200 species of fish, 45 species of
herpetofauna, 461 species of birds and 31 species of mammals.
CHAUDHARY, Sunita
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2.1. Limitations of the study
The study was limited to the main stream of the Koshi River because the survey was conducted after
the monsoon season when the river dolphins gather in the main channel from the water of its
tributaries at their low levels. Moreover, as the Koshi is changing its route every year and flowing
through several channels covering larger area, the study was limited to the major deepest channel
only. Nevertheless, almost all the sections of the Koshi River where the occurrence of dolphins have
been reported were covered and three different surveys at different times were conducted for the
accuracy of data. The study was more focused on the locations identified as potential sites of dolphins
and hotspots based on local consultation, literature review and number of threats. Lack of information,
in particular, the topographic map of the barrage area due to security reasons also limited the study to
some extent.
CHAUDHARY, Sunita
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Survey starting and ending pointsSurvey starting and ending pointsSurvey starting and ending points
Figure 1: Study area showing the surveyed route started from Chatara and ended to the Koshi Barrage
CHAUDHARY, Sunita
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3. METHODS
Suggestions from experts, conservationists, protected area administration and the local people were
collected prior to primary data collection and the study sites were selected accordingly. Primary data
were collected using participatory tools, essentially with the participation of the local people, Koshi
Tappu Wildlife Reserve staff, WWF staff and local tourism organisations. A continuous link was made
with the University of Klagenfurt and Supervisor during field survey in Nepal for their suggestions.
Further, links with WWF Nepal, the Department of National Parks and Wildlife Conservation along with
some related international conservation organisations were also established for additional guidance.
3.1. Literature Review
A review of available literature on the river dolphins, their habitats and threats was done to
summarize and synthesize the previous findings on the topic. Secondary sources in form of
management plan, research reports, annual reports and related publications were reviewed in detail.
Relevant organizations were visited to obtain related information regarding the river dolphins in Nepal
specifically in the Koshi River.
3.2. Reconnaissance survey
The study area was explored in general at first to have an overview of its status. Based on the local
consultations and information from the park staff, all potential sites of dolphins were pointed out
roughly on a topographic map. A preliminary survey was then conducted to identify hotspots of
dolphins and their distribution in the Koshi River. Standardized point counts were then analyzed for
population abundance assessment. The level of awareness among local inhabitants and fishers was
also assessed during the survey.
3.3. Key informant interviews
Key informants survey was conducted to get information about the abundance of dolphins in the area
and its population trend over the years. It was done in an informal way with open-ended questions
CHAUDHARY, Sunita
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with the local people. Qualitative information on the occurrence and distribution of dolphins was
obtained from the Koshi Tappu Wildlife Reserve staff, naturalists, biologists, Buffer zone committees
and line agencies, using semi structured and telephone interviews. The interviews targeted mainly the
fishers and indigenous people (Jhagad, indigenous ethnic group of that area) who were living along
the Koshi River basin and completely dependent upon the Koshi River for their livelihood since
decades.
3.4. Focus group discussion
To identify the existing threats and the sources of threats to the river dolphins in the Koshi River, a
focus group discussion was conducted in a comprehensive way. Detailed discussion was started with
factors threatening dolphins’ existence and their distribution in the river at the local level. Information
on recent sightings was reviewed and proposals on measures that could be taken to reduce the
threats at the local level considered. During the discussions, problems associated with management
and conservation of dolphins and standardized points counts which were analyzed during the
reconnaissance survey were also considered in detail.
3.5. Population survey
Based on information gathered from interviews, discussion and secondary information, a range of 38
km was surveyed in two different sections. The first section of 36 km stretched from Chatara up to the
Koshi Barrage. The second section started from the Koshi Barrage up to 2 km downstream of the
Barrage in the Nepalese part of the River. Since the survey was conducted during October 2006 and
January 2007 after the monsoon, the level of water was low and relatively deep water was flowing
through a mainstream. Therefore, a direct count method was used in the mainstream of the first
section at three different times. The standardized point counts were selected for the final counting in
the areas that were observed to have high dolphin activity and considered as potential sites for
dolphins. Following the dolphin survey conducted in the Karnali River basin of Nepal by WWF Nepal for
status surveys in 2006, a synchronized survey2 was conducted for the second section in the
mainstream at selected standardized points also at three different times.
2 Selected sighting spots were surveyed at the same time on same day to provide minimum population estimate
and minimize double counting (WWF Nepal, 2006)
CHAUDHARY, Sunita
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A team of 6 observers for the first section was formed and surveyed the area. Similarly, a team of 5
observers was formed for the second section and each of them was stationed at a distance of
approximately 50m at each selected point. The position of sighted dolphins was recorded with a
Geographic Positioning System (GPS), and information such as time period, habitat description, size of
dolphin and location of the observations was recorded on a data sheet. The data form is given in
annex I. The counting was continued for half an hour followed by 10 minutes break during which the
observers replaced each other in a rotation to repeat the counting of the others by allowing more than
one person to record data at the same points. In order to avoid double counting, the size, structure
and colour of the river dolphin were closely scrutinized. The areas apart from standardized points were
also surveyed. The counting was particularly focussed on the areas with deep pools and eddy counter-
currents, or where rivers converged or formed sharp meanders where dolphins were likely to occur.
3.6. Email survey
To know about the problems associated with management and conservation measures to the River
Dolphins at the national level, an email survey with open-ended questions was done. The possible
measures for conservation of this endangered mammal at the national level were assessed. Dolphin
experts of Nepal, conservationists from different national and international conservation organisations,
policy makers and personnel from tourism organisations were included in the survey. A total of 19
persons were selected and contacted for the survey. Their suggestions were analysed and have been
integrated into the report. The open-ended questions used for the survey are given in the annex II.
3.7. Data analysis
The dolphin population was estimated by taking the highest population count of three different
synchronized surveys of selected standardized point counts. The highest combined count of the day
was taken as the minimum population estimate. Dolphins of same size sighted at more than one
location at different times within 50 m distance were counted as a single individual. But dolphins of
same size sighted at more than one location at same time within 50 m distance were taken as two
different individuals. Dolphins of different size and colour sighted within 50 m distance were taken as
two different individuals. Simple statistical tools such as charts, tables and graphs were used to
analyze and interpret the findings of the study. The identified dolphin hotspots and local sightings of
dolphins were mapped with the GPS points taken during the survey using GIS tools.
CHAUDHARY, Sunita
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4. RESULTS AND DISCUSSION
4.1. Status and distribution of the River Dolphins in the Koshi River
A survey of the study site (a range of 38 km) during October 2006 and January 2007 in the Koshi
River indicated a total count of 15 dolphins. Dolphins were not sighted in the river section upstream of
the Koshi Barrage. However, local communities reported sighting of dolphins during the same period
upstream of the Koshi Barrage around Rajabas3 (Figure 1). An encounter of dolphin reported orally by
a bird watcher group and a recent incident of dolphin poaching in a nearby tributary during monsoon
above the Koshi Barrage also support the existence of P. gangetica in the areas. The presence of
dolphins in deep pools located around Barahachetra, Chatara and the Koshi Tappu Wildlife Reserve
section was also reported earlier by the local communities and Shrestha in July 1989.
Shrestha, in a survey carried out in the river section between the Koshi Barrage and the Barahachetra,
found a population of 8 dolphins upstream of the Koshi Barrage (Shrestha, 1989). Smith et al. (1994)
surveyed the area between the confluence of the Arun and Sun Koshi rivers; and the Koshi Barrage
during March-April and found only 3 dolphins. But no dolphins were found in this area in the present
study. All these observations (in 1989, 1993 and 2007) indicate that less and less dolphins are found
in the northern section of the Koshi Barrage. The decrease in the population of the river dolphins
upstream of the barrage is presented in Figure 2 below.
0
1
2
3
4
5
6
7
8
9
Shrestha, 1989 Brian Smith, 1994 Present study, 2007
Year
Nu
mb
er
of
do
lph
ins
Number
Figure 2: Population of the river dolphins in the northern section of the Koshi Barrage in three surveys
carried out at different times between 1986 and 2007
3 Rajabas is located at 260 42’ 31” N and 870 05’ 23” E (Buffer zone area of Koshi Tappu Wildlife Reserve)
CHAUDHARY, Sunita
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Although these data are indicative, because the methods used and distances covered were not
necessarily identical, they may indicate that the river dolphins may disappear completely in the
absence of immediate conservation measures.
In the southern section of the Koshi Barrage, we found a population of 10 to 15 dolphins distributed
within the range of 2 km in the river section downstream of the barrage. The first population survey
conducted from 1 to 5 November 2006 indicated a total of 10 dolphins (6 adults and 4 sub adults) in
the river section just below the barrage. The latter two surveys conducted during December 2006 and
January 2007 in the section of the first survey extended by 1 km downstream of the barrage showed a
total of 15 (10 adults and 5 sub adults) and 13 (9 adults and 4 sub adults) dolphins respectively.
Figure 3 shows an adult dolphin diving in the southern section of the Koshi Barrage.
Figure 3: An adult dolphin diving in the southern section of the Koshi Barrage
CHAUDHARY, Sunita
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4.2. Hotspots of dolphins in the Koshi River of Nepal
In the present study, most of the dolphins were found in the river section just below the barrage. The
southern section of the Koshi Barrage therefore considered as a hotspot for the dolphins in the Koshi
River system in Nepal. However, literature review (Shrestha, 1989) and interviews with local people
indicate that Chatara, Rajabas, Kushaha4, and Third tower area5 (see Figure 4 below) harboured in the
past, the populations of the river dolphins. One can consider that these sites could be revived as
potential sites for dolphins through the implementation of appropriate management strategies. Figure
4 shows the dolphin hotspot and the potential sites of dolphins in the Koshi River system.
The southern section of the Koshi Barrage is characterized by deep pools with reduced counter
currents and has gentle meanders 1 km downstream of the barrage. The area is threatened by
significant human activities (See section threats). Chatara is the starting point of the floodplain of the
Koshi River with a stony and gravely river bed having rapids. Whereas the channel at Rajabas is quite
wide as it has been formed by the confluence of several channels of the Koshi River itself but its water
flow is low in comparison to the flow at Chatara. The area is threatened by intensive fishing. The
section of the Koshi Tappu Wildlife Reserve (Kushaha and Third Tower area) has wide river section and
smooth meanders with a sandy river bed.
The hotspot and the potential sites of dolphins in the Koshi River were identified so that they can be
protected from potentially damaging human activities. Identification of hotspots of dolphins is
essential for effective protection measures. The World Conservation Union in 2003 in its Dolphins,
Whales and Porpoises: 2002-2010 Conservation Action Plan for the World’s Cetaceans (IUCN/SSC,
2003) stated the essentiality of identifying “hotspots” where dolphins occur in relatively high density
for conservation.
The hotspot and potential sites of the river dolphins in the Koshi River were identified based on local
people’s report of sightings; literature review, sightings during the survey carried out and observed
threats to the area.
4 Kushaha is located at 260 36’ 03” N and 870 05’ 23” E (Koshi Tappu Wildlife Reserve section) 5 The Third tower area is located at 260 36’ 17” N and 870 00’ 08” E (Koshi Tappu Wildlife Reserve section)
CHAUDHARY, Sunita
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Figure 4: Hotspots and potential sites of the river dolphins in the Koshi River system
CHAUDHARY, Sunita
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The need of integrating the identified hotspot and potential sites of dolphins into the Koshi Tappu
Wildlife Reserve was also assessed. Though a major portion of the Koshi River is under protection by
the Koshi Tappu Wildlife Reserve and the Ramsar Convention, these sites do not cover in a
comprehensive manner the identified representative hotspot of the Koshi river dolphins. The southern
section of the Koshi Barrage identified as dolphin hotspot where a relatively important population of
dolphins was sighted during the study does not fall under the area of the Reserve. The area is heavily
affected by human activities that reduce the quality of the Koshi water, degrade the limited range of
dolphins, including over-fishing with a variety of traps, nets and poisons, which in turn have disturbed
the ecological integrity of the area. The protection of this site is under no one´s responsibility but
there is an urgent need to protect this hotspot with some sort of regulations or other mechanisms.
The present study proposes integration of this dolphin hotspot into the buffer zone area of the Koshi
Tappu Wildlife Reserve for the protection of the degrading habitat of the Koshi River Dolphins (see
section recommendation).
CHAUDHARY, Sunita
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4.3. Threats to Platanista gangetica in the Koshi River
The threats to the river dolphins in the Koshi River were identified through direct field observation,
interviews and discussion with the park staff, fishers and the local inhabitants. Altogether 30 people
were interviewed during key informants survey and focus group discussion to identify the threats. The
degradation of habitat, the presence of the Koshi Barrage, intensive fishing accompanied by occasional
by-catch, fish poisoning and lack of awareness of the endangered status of the river dolphins and
pollution in the Koshi River were found as the main threats to the reduction in the number of dolphins
in the Koshi River. The results are presented in the Figure 5. Ineffective law enforcement and
inadequate conservation efforts from conservation organizations were also found as major causes of
the reduction in the number of dolphins at the national level.
0
5
10
15
20
25
30
35
Habitat
degradation
Koshi
Barrage
Intensive
fishing
Poisoning Lack of
aw areness
Pollution
Threats
% p
os
itiv
e r
es
po
ns
es
Figure 5: Percentages of people who indicated the main threats to the river dolphins in the Koshi River
in Nepal
4.3.1. Habitat loss and degradation
The high human population pressure along the river bank has exerted pressure on forest resources.
The indiscriminate deforestation in the buffer zone area of the Koshi Tappu Wildlife Reserve (DNPWC,
2000) and change in land use from forest land into agricultural land have resulted in siltation in the
Koshi River. This situation has been further accelerated by livestock grazing along the river banks,
CHAUDHARY, Sunita
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wood collection and over-collection of thatch, grass and other aquatic resources. The Figure 6 shows
illegal wood and thatch collection from the Koshi Tappu Wildlife Reserve.
Figure 6: Illegal wood, thatch and grass collection from the Koshi Tappu Wildlife Reserve
These activities have caused erosion in the area, altering the aquatic habitat with the heavy load of
siltation. Locals reported serious loss of fish species in the river, which can be linked to the dolphin
depletion in the Koshi River. The Koshi River basin has also been affected by the construction of
several structures such as the Koshi Barrage, the Chatara irrigation canal and several embankments.
Rajbanshi (2002) reported the negative impacts of such infrastructures on migration and breeding of
important fish species degrading the fish habitats of the Koshi especially spawning and nursery
ground. Locals reported Chatara as an area of dolphin activity and breeding ground for dolphins in the
past but dolphins have rarely been sighted since the construction of the Chatara irrigation canal.
4.3.2. Over exploitation of fisheries
Observations during the study showed high fishing activities in Chatara, Srilanka Tappu and Rajabas
areas where dolphins were reported by the local communities. Certain locations apart from these
places have also been subjected to intensive exploitation of fishes. For instance, fishing near by the
barrage area is significant especially in the southern section of the barrage (Figure 7) is highly
stressed with fishing activities where dolphins were sighted during the study. During interviews, local
fishers reported that they like to fish in the areas of dolphin because they can find fish stock near by
them.
© ZECHNER Lisbeth, 2006© ZECHNER Lisbeth, 2006
CHAUDHARY, Sunita
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Figure 7: Fishing in the southern section of the Koshi Barrage
The traditional fishers (Ghodi, Mallaha, Mukhiya and Bahardhar) and the increased involvements of the
immigrants from nearby areas have increased fishing activities in the Koshi River as fishing is the
basis of their livelihood. The riverine environment of the Koshi River is degraded with the increasing
trend of fishing occupation among other people of the area, and the demand of fish from the Koshi
River all over Nepal and in some parts of India has further exerted fishing pressure in the Koshi River.
This fishing pressure led to over-harvesting of fish and the decline of fish populations. Even inside the
Koshi Tappu Wildlife Reserve, illegal fishing activities are common in Trijuga River, Kamal daha and in
the Koshi River in spite of prohibitions inside the reserve (DNPWC, 2000).
The present study recorded gillnets (Figure 8), drag nets and cast nets especially in the barrage area
and Yadav (2002) reported use of nets such as lift nets, nets with indigenous names such as tunny jal,
chatti jal, chauki jal, shoat, hapa and different types of traps, rods and lines in the Koshi River. He
further reported the use of destructive devices such as dynamite, fish poisons, electro-fishing and
their negative impact on fish population by destroying brood stock, spawning and the nursery
grounds. This clearly indicates the prey depletion in the area which is indirectly affecting the river
dolphins and can be linked to reduction in their population.
Though no dolphins were found caught by these nets by the present study but local communities
reported that a juvenile was caught by a gill net few years back downstream of the barrage. Such nets
can be very dangerous to the river dolphins; they are not easily detected visually and acoustically by
dolphins and can entangle fish fauna of all size and thus can pose a direct threat to the breeding fish
populations (Shrestha, 1995).
Dolphin
CHAUDHARY, Sunita
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Figure 8: Gillnetting in the southern section of the Koshi Barrage
4.3.3. Pollution and poisoning
During study, activities like washing of clothes, bathing and waste dumping were observed very often
especially in the barrage area (Figure 9). Hotels and small shops near by the Koshi Barrage were
dumping their wastes directly into the river. The park staff reported the use of toxic plants extracts as
fish poison for mass fishing in the Koshi River. Yadav (2002) mentioned that fishers were using Agave
americana, Sapium insinge, Dioscorea, Euphorbia vovelanavo for fishing in the Koshi River. Fish
poisoning can directly and indirectly harm the Koshi river dolphins.
Chemical fertilizers and pesticides are heavily used for agricultural purposes in the Koshi River area.
These chemical inputs are another source of pollution. An estimated 87.3% of the economically active
population in the buffer zone of the Koshi Tappu Wildlife Reserve is involved in the agricultural
activities (DNPWC, 2000) and practices some types of intensive agriculture. Much of the applied
chemicals is washed away into the Koshi River during the monsoon season and thus degrades the
quality of Koshi river water (Sharma et al., 2005) and thus threatens the life in the Koshi River. The
chemicals that are probably of most concern for dolphins are the persistent organic pollutants
Gillnet
CHAUDHARY, Sunita
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including pesticides and these substances can enter the food chain and accumulate along the chain up
to the top predators like the river dolphins (Haque, 1998).
Figure 9: Bathing, washing and sewage disposal activities are common in the Koshi Barrage area
4.3.4. Barrage and embankments
The Koshi Barrage has altered the primary habitat6 of dolphins by making the river section upstream
of the barrage like a lake and eliminating the counter currents downstream of the barrage where
dolphins and their prey shelter. The Koshi Barrage built in 1963 (Figure 10) is a low gated dam of a
length of 1150 m, with a ladder that is inefficient for fish migration (Rajbanshi, 2002), thus posing
direct threat to the river dolphins of the Koshi River. The barrage has fragmented the downstream and
upstream dolphin population. The dolphins might have moved downstream through the Koshi Barrage
during high water periods but the high currents might have prevented them from swimming upstream
through the barrage. The isolated populations upstream of the Koshi Barrage might have not breed
longer. Haque (1998) reported that the effects of subdividing a single population into non-interacting
insular units increase their vulnerability to environmental, demographic, genetic and etiological
threats.
6 Primary habitats are characterized by an eddy counter-current system in the main river flow caused by a fine
sand/silt point bar formed from sediment of a convergent stream branch or tributary. Whereas marginal habitats
are characterized by a smaller eddy current system caused by an upstream meander. Dolphins concentrate on
locations of high prey availability and reduced flow (Smith, 1993).
CHAUDHARY, Sunita
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Figure 10: Koshi Barrage built in 1963 on the Koshi River in eastern Nepal
Irrigation by damming a long and low gated barrage and the construction of a number of
embankments have caused major changes in the Koshi River water flow pattern, sediment load and
water quality (Rajbanshi, 2002). Such changes can severely affect the Koshi river dolphins.
Embankments of the size of 40 km and 12 km along the eastern and western river banks in the Koshi
River for extensive flood control have restricted to the floodplain habitats that are critical for
reproduction and growth of river fishes. This can result in reduced fish production and thus can affect
the dolphins.
The Koshi High Dam7 that is planned to be built to a height of 269m-335m and the construction of a
165 km long water way from Chatara can imply a series of upheavals for the environment of the Koshi
River (Environmental News Service, 2004), and can contribute to the loss of dolphins in the Koshi
River. This planned Koshi High Dam can lead to the loss of forests, wildlife habitat and aquatic
biodiversity both upstream and downstream of the Koshi barrage which is a matter of concern for the
conservationists of Nepal.
7 The Koshi High Dam is a joint project of Government of Nepal and Indian Government to build a dam in Koshi
River (Environmental News Service, 2004).
CHAUDHARY, Sunita
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4.3.5. Poaching and accidental death
A recent poaching incidence of dolphin in the nearby tributary of the Koshi River was reported during
an interview with the staff of the Koshi Tappu Wildlife Reserve. A dolphin was poached by a team of
local villagers for its meat in a small tributary during the monsoon in a village near the Wildlife
Reserve. The snout of the poached dolphin (Figure 11) was caught by the park staff. Cases of
deliberate killings of dolphin were reported in the Indian Territory during interviews with the local
fishers. Bycatch in the Koshi River in the Nepalese Territory is occasional which can be illustrated by a
juvenile caught by gillnetting few years back downstream of the barrage.
Figure 11: Snout of a poached river dolphin in the Koshi River
4.3.6. Ineffective law enforcement
Over the last few years, there have been several acts and policies for the conservation and wise use of
aquatic resources but they have not been implemented effectively so far. Though the river dolphin is a
legally protected mammal and is included in Schedule I in the list of 27 protected mammals of
National Park and Wildlife Conservation Act 1973 and Appendix I in CITES, very little attention has
been given to this flagship species. Some acts: Aquatic Animal Protection Act (AAPA) 1961, National
CHAUDHARY, Sunita
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Parks and Wildlife Conservation (NPWC) Act 1973, Water Resource Act 2049 (1992) and Wetland
Policy 2003 are obligatory for the protection of endangered species, aquatic life and their habitats.
Despite these acts and regulations, indiscriminate habitat loss and degradation of freshwater species,
destructive fishing practices and poisoning of water bodies continue to have negative impacts on the
freshwater species including endangered river dolphin. For instance, Aquatic Animal Protection Act
1961 mandates the conservation of aquatic life by recognizing the value of wetlands and aquatic
animals. It prohibits illegal killing and trapping of aquatic life but the freshwater fishes are usually
harvested using poison, electrical devices and trapping.
The Government of Nepal has not initiated concrete conservation measures for its protection at both
the local and national levels. Species conservation action plans for keystone species have been given
high priority in the National Biodiversity Strategy (NBS) 2002 but there is no action plan for the river
dolphins in Nepal.
4.3.7. Awareness
Lack of awareness at the local level was identified as one of the most important constraints to the
conservation of the Koshi river dolphins during the present study. Mechanisms are not available at the
local level to enhance awareness about the benefits from conservation measures, rules and
regulations regarding the river dolphins in the Koshi river basin. During the present study, people in
the barrage area, but not people in the villages, were found to be aware about the legal status of the
river dolphins.
Despite legal prohibition (AAPA 1961), over-exploitation of fishes, fishing of spawning and breeding
fish, poisoning and fishing by dynamite are prominent at the local level. Thus, the lack of awareness
about the endangered status of the river dolphins and their habitat among the local people is indirectly
contributing to the depletion of dolphins in the Koshi River in Nepal. Local communities, legislators,
local governments and related organisations need to be fully informed about the river dolphins in
Nepal.
CHAUDHARY, Sunita
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5. CONCLUSIONS
The Ganges River Dolphin or Soans in the Koshi River of Nepal is on the verge of extinction,
particularly in the river section upstream of the Koshi Barrage. Their status and distribution in the
river section upstream of the Koshi Barrage have declined significantly in the last decade. Very few or
no dolphins may still survive in the upstream part of the barrage as the local8 communities reported to
have observed 1 or 2 individuals in very recent times while no dolphin was found during the present
study. Although dolphins may exist in the river section upstream of the Koshi Barrage, their
populations will not be sustained in the future in the absence of immediate conservation measures.
Even though local communities reported rare sightings of dolphins in the irrigation canal of Chatara or
in small tributaries of the Koshi River during monsoon, their distribution is limited from the Koshi
Barrage up to Chatara in the river section upstream of the Koshi Barrage.
The synchronized surveys in the river section between the Koshi Barrage and the distance 2 km
downstream of the barrage sighted 10, 13 and 15 dolphins at different times. The southern section of
the Koshi Barrage was identified in the present study as a hotspot for dolphins, and Chatara, Rajabas,
Kushaha and the Third Tower area as the potential sites for dolphins. However, it should be borne in
mind that the Koshi River is changing its route every 1-2 years. Thus the exact potential sites for
dolphins may change with time.
The southern section of the Koshi Barrage is under a lot of pressure from human activities but the
river section of Kushaha and Third Tower area that are with in the core zone of the Koshi Tappu
Wildlife Reserve are not stressed. Intensive fishing with gillnets and drag nets and garbage disposal in
the southern section of the Koshi Barrage pose a threat to dolphins in the area. The existing laws
concerning protection of the river dolphin and its habitat are ineffective. Related organisations are not
so much concerned about the small population of dolphins in the Koshi River.
8 Locals in this case is local people, reserve staff and a bird watcher group
CHAUDHARY, Sunita
25
6. RECOMMENDATIONS/SUGGESTIONS
No single solution will facilitate the recovery of the river dolphins in Nepal. If the relic population of P.
gangetica is to survive in the Koshi River of Nepal, a multifaceted approach is required immediately
and should be acted upon promptly to protect the critical habitats and mitigate threats so as to
facilitate the recovery of the population of dolphins. The following recommendations have been made
based on the findings of the study, ideas or suggestions collected from local and international
conservation experts.
6.1. Hotspot of the river dolphins and the Koshi Tappu Wildlife Reserve
1. It is recommended that the buffer zone area of the Koshi Tappu Wildlife Reserve should be
extended to cover the dolphin hotspot, and enhance its level of protection. The extension of
southward border of the buffer zone of the Reserve could be an option to cover the area of
high dolphin activity of the Koshi Barrage. The area could thus be protected under the Buffer
Zone Management Regulations (1996) and the Buffer Zone Management Guideline (1999) of
Nepal. This challenge should be initiated from the local level with the participation of all
stakeholders and the actions should be facilitated by the Government.
2. A landscape level conservation initiative is needed to conserve the Koshi river dolphins along
with other endangered species and their habitat. Establishment of Dolphin Protected Area
could also be a hope for the protection of this species.
6.2. Conservation Education and Awareness
1. Raising awareness about the value, importance and benefits of the conservation of the river
dolphins should be initiated as soon as possible. Education materials in local language and
campaigns focusing on the aspects of dolphin conservation and impacts of chemical fertilizers,
fishing nets, poisoning and garbage disposal, and the methods to mitigate these impacts
should be developed and promoted.
CHAUDHARY, Sunita
26
2. At the local level, awareness activities should be initiated focusing more on Special Target
Groups9 inhabiting that area, in coordination with the Koshi Tappu Wildlife Reserve, the Buffer
zone Committees, local NGOs and voluntary clubs. At the same time, policy and decision-
makers should be made aware of the need to protect river dolphins at the national level.
3. This year is particularly important because it has been declared by UN Convention on
Migratory Species as the Year of Dolphin10 to enhance awareness and protect dolphins from
extinction.
6.3. Ecosystem Approach (Species and Habitat protection)
1. After recognizing the threats to the river dolphins and taking local people’s need into
consideration, an ecosystem approach11 is recommended for the Koshi river dolphins. Rather
focusing on the Koshi river dolphins only, activities should be encouraged for ecosystem
protection in an integrated way by controlling or regulating fishing in the area, providing
alternative opportunities for the fishers, promoting organic agriculture and eliminating
pollution sources.
2. Lessons should be learned from these activities as part of an adaptive management scheme.
The role of human beings as part of the ecosystems should be reemphasized as well as the
short and long term consideration of human actions. Guidelines and code of conducts for
sustainable fisheries (example FAO12) should be used and promoted.
9 Fishers, local communities, school children, visitors and local based organisations 10 http://www.yod2007.org/en/Start_page/index.html 11 In the Convention on Biological Diversity, ecosystem approach is described as a “strategy for the integrated
management of land, water and living resources that promotes conservation and sustainable use in an equitable
way.” Humans are recognized as part of ecosystem in the sense that they can impact on the other components of
the ecosystem and will also be influenced by the status of the other elements of the system. Application of the
approach requires some decentralization of the decision-making process, the participation of all stakeholders and
consideration of factors in space and time. Adaptive management is an important principle of the approach
(http://www.cbd.int/convention/cop-5-dec.shtml?m=COP-
05&id=7148&lg=0%20and%20http://www.cbd.int/convention/cop-7-dec.shtml?m=COP-07&id=7748&lg=0 ) 12 http://www.oceanlaw.net/texts/faocode.htm
CHAUDHARY, Sunita
27
6.4. Research and monitoring
1. Detailed population surveys are recommended in the future to verify the presence of dolphins
in the river and determine their abundance and movements towards the small tributaries of
the Koshi River during monsoon season.
2. Surveys are required to assess the threats to the river dolphins as well as to other aquatic
fauna from toxic chemicals, including fertilizers by analyzing samples of water, river sediments
and its prey species.
3. The capacity of local researchers of Nepal should be enhanced for dolphin’s population
assessment and freshwater ecosystem conservation efforts.
4. Detailed surveys are required as a matter of urgency to study the possible impact of climate
change (increased air and water temperatures, extreme climatic events and increased drought
etc.) on river ecosystems, river dolphins and fish populations of the Koshi River.
5. Effort should me made to secure funds from national and international organisations for
required surveys and conservation efforts with regards to the protection of the Koshi river
dolphins and their habitat.
6.5. Effective law enforcement
1. The relevant existing acts and policies should be adequately communicated, enforced and be
updated to reflect new knowledge and circumstances. The government organizations need to
be active and should implement concrete conservation measures accordingly cooperating with
other conservation organizations.
2. As recommended by WWF Nepal in 2006 for the river dolphin in the Karnali River basin, a
comprehensive river basin ecosystem conservation policy should be developed and
implemented for the protection of the river systems and its tributaries in Nepal. Systems
should be established for monitoring the status and trends of the dolphin populations.
CHAUDHARY, Sunita
28
3. A dolphin conservation action plan emphasizing the importance of the protection of important
habitats, the relocation and restoration of dolphins should be developed and implemented as
soon as possible.
4. A sound framework for sustainable fishing should be initiated by forming fishing management
committee in participation with all stakeholders, in particular, the fishers. Fishing should be
regulated or controlled by permit system especially during fish breeding seasons. The
poisoning of the river for mass fishing should be strictly prohibited and patrolling system
should be established to control over fishing as well as poisoning in the river.
5. Use of fishing nets that are harmful to the river dolphins especially in their primary habitat and
other endangered species of the Koshi River should be banned.
6. Consideration of dolphins and other important living organisms of the Koshi River should be
integrated to the existing environmental impact assessment procedures so that the risks of
new initiatives and other activities (for example: application of chemical fertilizers) can be
minimized before the activities area carried out.
6.6. Ecotourism
1. An ecotourism master plan should be developed by the Koshi Tappu Wildlife Reserve, and a
program for sustainable ecotourism should be implemented incorporating all tourist attractions
in one package in coordination with the local people, tourism operators and entrepreneurs,
taking into account the CBD Guidelines on Biodiversity and Tourism Development adopted by
the 190 Parties to the Convention in 2004 (decision VII/14 accessible at the CBD website:
(http://www.cbd.int/convention/cop-7-dec.shtml?m=COP-07&id=7751&lg=0).
2. Coordination among tourism development offices, civil association authority, hotel managers,
and travel agencies, UCs and NGOs/INGOs will ensure success in this endeavour. The returns
on ecotourism can become an incentive for the local communities to further conserve dolphins
and maintain their habitats in an adequate state. Ecotourism could contribute to the
improvement of the livelihood of local communities.
6.7. Alternatives to unsustainable fishing
CHAUDHARY, Sunita
29
1. An alternative for the local people could be sustainable fish farming that is environmentally
friendly (with limited chemical inputs) so that the pressure on the Koshi River can be reduced.
2. Alternative income generating activities, for instance private or community managed fish
farming, for the people who are completely dependent on fishing should be introduced in the
region and these responsibilities should be taken by the Government, and NGOs/INGOs.
3. To facilitate upstream, downstream and lateral migration of fishes, cooperation with the
concerned departments/sectors (intersectoral co-operation) should be developed as soon as
possible, for example for the erection of fish ladders in the Koshi Barrage. The feasibility of the
construction of the Koshi high dam should be preceded by Environmental Impact Assessment
that takes into account biodiversity.
CHAUDHARY, Sunita
30
7. REFERENCES
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American Cetacean Society. 2004. The American Cetacean Society Fact sheet: Boto (Amazon River
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Aryal, R.S. 2007. Save our Dolphin: an article on Environmental Nepal. Environmental Nepal- pledge
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29
Behera, S. 2006. Freshwater Dolphin in Ganges. WWF India. Accessed on 13 May 2007 at
http://www.wwfindia.org/about_wwf/what_we_do/freshwater_wetlands/our_work/freshwater_
dolphin/index.cfm
Behera, S. 2007. A blind dolphin in one of the worlds most densely populated area. WWF India.
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http://www.panda.org/about_wwf/what_we_do/species/about_species/species_factsheets/cet
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8. ANNEXES
8.1. Annex I: River Dolphin Sighting Sheet
Date Time Habitat
Description
Observer
Name
No. of
sightings
Size (Adult/Sub-
adult)
Remarks
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8.2. Annex II: Email questionnaire survey
1. What do you think are the problems associated with conservation of River dolphins in Nepal at
national level?
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
2. What could be the possible solutions to save remnant population of dolphins in Nepal?
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
3. What could be the initiatives at policy level for protection of this endangered mammal?
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
4. What should be Government’s approach for dolphin conservation in future?
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
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8.3. Annex III: Financial Statement
Item Details Unit
price
(£)
No. of
units
Contribution
from
Austrian
Exchange
(£)
Rufford
Expenses
(£)
Personal
contribution
(£)
Accommodation during field work
Living expense for Researcher, Assistant and a Guide
27 per day
86 days
2322.00
20.00
Boat surveys for dolphin counts
60
6
360.00
Focus group discussion
60
2
120.00
Field surveys
Key Informants Survey
50
1
50.00
Air travel (from/to Austria)
1
1087.00
Local travel within country
120
3
360.00
Travel expense
Local travel to field sites
80
3
240.00
Binocular
167 1 167.00
Rook sac
57 1 57.00
Maps of study area
11 2 22.00
Expenses for field equipments
Boots
80 1 80.00
Stationeries
100.00
Rufford Stickers
Affixed on the field equipments purchased to give due credit to Rufford Foundation
21.00 9.00
Production of final report
Final report
60
11
280.00
380.00
Total 1367.00 4279.00 29.00
Grand Total 5675.00
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