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GUIDE OAK 국가리포지터리 부경대학교

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Alternative Title: A Bioeconomic Analysis for Resource Assessment of Yellowfin Tuna Caught by Multiple Fishing Gears in West Sumatra Waters

Abstract: This study provides a stock assessment of the Yellowfin tuna (Thunnus albacares) caught
mostly by Long Line (LL), Purse Seine (PS), and Hand Line (HL) fisheries, focusing on a
single species and multiple fisheries (1x3) of the Fisheries Management Area (FMA) 572
in West Sumatra waters.

Furthermore, this study analyses the standardized fishing efforts
for those three fisheries using general linear model. Based on the Gompertz growth
function, a surplus production model of Clarke-Yoshimoto-Pooley (CYP) is used in order
to determine the effort and catches at sustainable levels, allowable biological catch (ABC)
and associated fishing effort. The maximum economic yield is estimated using a
bioeconomic model. This maximizes the economic potential and associated fishing activities.

As part of the study, the economic interactions between the LL, PS, and HL are
also examined, as well as a comparison of the net profits obtained from each of the three
estimated ABCs is carried out. Moreover, the results of this study suggest that the total
allowable catch for a single species and multiple fisheries is necessary to maintain
Yellowfin tuna stocks in West Sumatra.

URI: https://repository.pknu.ac.kr:8443/handle/2021.oak/33094
http://pknu.dcollection.net/common/orgView/200000668453

Table Of Contents: 1. Introduction 1
1) Background 1
2) Purpose of Research 4
3) Research Framework 5
2. Yellowfin Tuna Fishery in West Sumatra Waters 8
1) Fisheries Catch in West Sumatra Waters 8
2) Tuna and Tuna-like Species Catch in West Sumatra Waters 10
3) Yellowfin Tuna Catch in West Sumatra Waters 13
4) Consistently Used-the most Frequently in Operation Fishing Gear 17
3. Materials and Methods 22
1) Study Site 22
2) Data Source 22
3) Total Cost, Landed Value, and Producer Price Index 27
4) Study Structure 29
5) Estimation of the Standardized Fishing Efforts for a Single Species Caught by Multiple Fisheries (1x3) 30
6) Equilibrium Model 32
7) Clarke–Yoshimoto–Pooley (CYP) Model 35
8) Maximum Sustainable Yield 36
9) Maximum Economic Yield 37
10) Allowable Biological Catch 40
11) NP of Individual Fisheries 44
4. Result and Discussion 45
1) Standardized Fishing Effort 45
2) CYP Model to Estimate CPUE∞, q, k, and a 51
3) Estimates of YMSY and FMSY 56
4) Estimates of YMEY and FMEY 59
5) Estimates of YABC and FABC 62
6) Estimates of NP at the ABC Level 64
5. Conclusion 67
6. Acknowledgment 69
7. References 70

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