thesis pp presentation_2013

7/28/2019 Thesis PP Presentation_2013

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Oriel O. Rosero

BS Fisheries Student

March 5, 2013

CATCH COMPOSITION, RELATIVEABUNDANCE, AND CATCH-PER-UNIT-EFFORT

OF HANG FISH TRAP IN ALIMANGUAN, SAN

VICENTE, PALAWAN (ASVP)


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INTRODUCTIONMunicipal fishing

In ASVP there are different kinds of fishing device

Left net and hook and line

Fish traps

The fishing gears were already studied Fish corral (Pagliawan, 1999) and Hook and line

(Solis, 2004)

Ring net (Abelinde, 1999) and Purse seine (MMS

2001) Fall gill net (Lydon et al.. 2008)

Hang-fish trap

Passive gear, used with or without baits


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OBJECTIVES

This study aimed to:

determine the catch composition and relative

abundance of species caught by hang fish trap;

determine catch-per-unit-effort of hang fish trap;and

determine the length - weight relationship of fish

caught by hang-fish trap.


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SCOPE AND DELIMITATION

Focused on:

Catch composition and telative

abundance

catch-per-unit effort Length-weight relationship of S.

Operative in Brgy. Alimanguan, San Vicente,

Palawan

November to December 2012


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MATERIALS AND METHODS

Sampling site


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Sampling procedure


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Measurement of samples

a

b


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RESULT AND DISCUSSIONTable 1. The species composition and relative abundance of fish traps from Alimanguan, San Vicente, Palawan.


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a b

c d

e f


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Figure 6. Relative abundance of species caught by hang-fish traps from Alimanguan,

San Vicente, Palawan.

93%

3%2%

1% 1%0%

Sepioteuthis lessoniana

Sepia Latimatus

Kyphosus Vigienses

Diodon holocanthus

Echenies naucrates

Platax teira


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16

16.5

17

17.5

18

18.5

19

19.5

20

November December

19.8

17.291

Weight(kg)

Figure 7. The CPUE of hang-fish trap from Alimanguan, San Vicente, Palawan.

Catch per-unit-effort


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CPUE of hang-fish trap was 0.154kg/hr

CPUE per species

S. lessoniana (0.143kg/hr) S. latimatus (0.004kg/hr)

K. vigienses (0.003k g/hr)

D. holocanthus (0.0016kg/hr)

E. naucrates (0.0010kg/hr)

P. batavianus (0.0002kg/hr)

Furthermore,during operation

November (13 traps)

December (12 traps)


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Table 2. The efforts of different fishing devices used


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y = 0.092x2.596

R = 0.945

0

100

200

300

400

500

600

700

800

900

1000

0 5 10 15 20 25 30 35 40

Weight(g)

Head length (cm)

Figure 8. The LWR ofS. lessoniana caught in hang-fish trap (n=65)

Length-weight relationship of .S.

lessoniana


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CONCLUSION

Based on the study:

Sepioiteuthis lessoniana (Lolinginidae) was the

dominant speciescaught by fish traps in ASVP

The CPUE of fish traps used in the study is

lower compared to the CPUE of other gears

used in other studies

There is a positive correlation on the mantle

length and body weight ofS. lessoniana


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RECOMMENDATIONS

Based on the results of this study, the following wererecommended:

Longer monitoring (e.g. one year) of the species

composition and relative abundance of hang-fish trap;

Monitoring on the species composition and relativeabundance of hang-fish trap in different lunar phases

(New moon, first quarter, full moon, and last quarter);

Monitoring of species composition and relative

abundance of hang-fish trap with daytime and nighttimesampling; and

Slight modification on the structure of fish trap, to

compare the catching efficiency


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THE END

thesis pp presentation_2013

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