orange roughy namibia

Orange roughy Namibia

8° E 10° E 12° E 14° E 16° E31° S

29° S

27° S

25° S

23° S

21° S

19° S

17° S C u n en e R iv e r

C ap e F rio

M o w e B ay

A m b ro se B ay

W alv is B ay

C o n cep tio n B ay

E aste r p o in t

L u d eritz

1 0 0 0 m

2 0 0 m

3 0 0 0 m

Hotspot

Rix

Frankies

Johnies

•Background

•Exploratory fishing for orange roughy started in 1994

•During 1997/98 three companies were allocated quotas of

12 000 tonnes in total.

•The fishery has been managed separately for the four known

aggregations (QMA’S)

•The first scientific survey was conducted in July 1997, using

hydro-acoustics and swept area trawls.

•Fishing down Strategy was used, based on CPUE

•From 2008 to 2010 a moratorium on all catches

Objective 1

To review the historical development of the Orange Roughy fisheries in Namibian waters including catches and fleet.

Deliverable 1

Report on the historical development of the Orange Roughy fisheries in Namibian waters including catches and fleet.

Objective 2

To review the biological and ecological data collected during Orange Roughy stock assessment surveys

Deliverable 2

Synthesis report of biological parameters for Orange Roughy in Namibia to give an up to date description of the current knowledge of their life history pattern, stock structure and status.

Objective 3

Evaluation of the Orange Roughy closed areas for its efficiency and review of data requirements to evaluate stock recovery.

Deliverable 3Review of current management and monitoring procedures of the Orange Roughy stock in Namibia including evaluation of the efficiency of the closed areas. SWOT (Strength and weaknesses, Opportunities and threats) analysis of scientific projects and data collection programmes, in terms of fulfilling the data requirements for adequate management and monitoring regimes for Orange Roughy.

Objective 4

Review of current management and monitoring procedures for orange roughy in Namibian waters (including assessments, biological reference points, harvest control rules) and status of stocks and identify possible improvements in current management and monitoring framework. Deliverable 4

Proposal of improved management and monitoring framework for Orange Roughy in Namibian waters.

Data Availability

1.Landings, bycatch (1994-2007) – Access database

2.Fleet information (1994-2007) - Excel

3.Biological data collected during surveys (11) – Excel

4.Biological data collected by observers – Access

5.Survey Biomass Estimates (1997 – 2007) - Excel

Data Not Available/ Limited

1.Lack ageing data

2.No data on substrates/corals/ VME’s

3.Limited Economic Data

Biomass estimates 1997-2007

0

10000

20000

30000

40000

50000

60000

97/9

8

98/9

9

99/0

0

00/0

1

01/0

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02/0

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03/0

4

04/0

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05/0

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06/0

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07/0

8

Fishing season

(t)

Johnies

Frankies

Rix

Hotspot

Landings & TACs 1997-2007

0

2000

4000

6000

8000

10000

12000

14000

16000

1800097/9

8

98/9

9

99/0

0

00/0

1

01/0

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02/0

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03/0

4

04/0

5

05/0

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06/0

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07/0

8

Fishing season

(t)

Landings TAC

Maturity

AreaArea SexSex % Immature% Immature % Mature% Mature Sample size Sample size (n)(n)

JohniesJohnies FemalesFemales 3030 7070 652652

MalesMales 4141 5959 13191319

FrankiesFrankies FemalesFemales 2525 7575 15211521

MalesMales 2626 7474 11651165

RixRix FemalesFemales 5656 4444 872872

MalesMales 5757 4343 740740

Average Length

YearYearJohniesJohnies FrankiesFrankies RixRix

MaleMale FemaleFemale MaleMale FemaleFemale MaleMale FemaleFemale

19971997 26.526.5 27.927.9 27.927.9

19981998 26.026.0 27.327.3 28.128.1

19991999 24.824.8 26.326.3 26.426.4 27.127.1 25.125.1 25.925.9

20002000 23.623.6 25.925.9 26.726.7 27.327.3 ** **

20012001 24.024.0 25.325.3 27.127.1 28.028.0 **** ****

20022002 23.423.4 25.125.1 26.826.8 28.028.0 ** **

20032003 23.323.3 24.524.5 27.527.5 28.528.5 26.826.8 27.527.5

20042004 23.223.2 25.025.0 26.926.9 28.628.6 ** **

20052005 24.224.2 25.825.8 26.426.4 27.127.1 ** **

20062006 22.722.7 24.424.4 26.326.3 27.727.7 25.825.8 26.826.8

Thank You