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Abstract: The fishing activity of Venezuela is mainly focused on the production of two marine fisheries such as tuna and sardine, amount to approximately 54% of total national catches, being the first item of artisanal origin and the second object of industrial offshore fishing, both generate an important level of employment and industrial movement within the sector. Venezuela became a full-member of the Inter-American Tropical Tuna Commission (IATTC) in 1992. This, helped the country establish a solid fishing fleet operating in the Eastern Pacific Ocean (EPO). The present study performs an assessment of Venezuela’s tuna fishery in the EPO. By the bioeconomic model, the study analyses fishing data (catch and effort) for last 26 years (1993-2018), employing one of the exponential growth model in surplus production model: Clarke, Yoshimoto and Pooley (CPY). The results of the model show that the fishing effort (associated to boat size) and the catch should be reduced by 34 % and 24 %, respectively, in order to harvest fisheries resources of the EPO and maintain economic profitability. Determining accuracy of the model Theil’s U-statistics is estimated to be 0.64, which implies that estimated catches of the model and actual catches represent quite similar. Therefore, it is necessary to implement effective management measures and policies, to evaluate how to reduce the fishing effort and catch.

Keyword: Venezuela’s tuna fishery Maximum sustainable yield (MSY); Maximum economic yield (MEY); Surplus production model; Clarke Yoshimoto and Pooley (CYP) model.

URI: https://repository.pknu.ac.kr:8443/handle/2021.oak/23667
http://pknu.dcollection.net/common/orgView/200000287102

Table Of Contents: 1.Introduction 1
1.1.Background 1
1.2.Aim of research 4
1.3.Objectives 5
2.General Overview 6
2.1.The Pacific Ocean 6
2.1.1.Physiography 7
2.1.2.Biological resources 9
2.1.3.Trade and transportation 11
2.2.Inter-American Tropical Tuna Commission 12
2.2.1.Objectives 15
2.2.2.The area of competence 15
2.2.3.Headquarters and Regional Offices 16
2.2.4.The Agreement on the International Dolphin Conservation Program 16
2.2.5.Venezuela and the Inter-American Tropical Tuna Commission 18
2.3.Fisheries activity in Venezuela 19
2.3.1.Fish consumption per capita 21
2.3.2.Exports 22
2.3.3.Imports 22
3.Materials and Methods 23
3.1.Surplus production model 23
3.1.1.Schaefer model 27
3.1.2.Schnute model 29
3.1.3.Walters and Hilborn model 30
3.1.4.Fox model 32
3.1.5.Clarke, Yoshimoto and Pooley model 32
3.2.Maximum sustainable yield (MSY) 33
3.3.Maximum economic yield (MEY) 34
3.4.Fishing in open access equilibrium (OAE) 36
3.5.Catch and fishing effort data 37
3.6.Economic data 40
3.6.1.Price 40
3.6.2.Cost of effort 41
4.Results and Discussion 45
4.1.Catch per unit effort 45
4.2.Annual catch of Venezuela 1993-2018 48
4.3.Estimates of surplus production model 48
4.4.Estimated catch of Venezuela 1993-2018 50
4.5.Theil’s U statistic 51
4.6.Estimates of bioeconomic model 52
5.Conclusions 57
Acknowledgement 61
References 62

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