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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/33188

Title: Evaluating fishery impacts: Application to bigeye tuna (Thunnus obesus) in the eastern Pacific Ocean
Authors: Sheng-Ping Wang;Mark N. Maunder;Alexandre Aires-da-Silva;William H. Bayliff
Contributors: 國立臺灣海洋大學:環境生物與漁業科學學系
Keywords: Bigeye tuna;Eastern Pacific Ocean;Fishery impact;Fisheries management;Maximum sustainable yield;Stock assessment
Date: 2009-08-01
Issue Date: 2012-11-19T08:06:02Z
Publisher: Fisheries Research
Abstract: abstract:The use of fishery impact plots and maximum sustainable yield estimations by fishery to evaluate fishery impacts are illustrated using the bigeye tuna stock assessment in the eastern Pacific Ocean (EPO). The stock status of the bigeye tuna stock in the EPO is evaluated using the general stock assessment model Stock Synthesis II. Fishery impact plots are developed to examine the effects of the different fishery groups on the bigeye tuna spawning biomass by simulating the population dynamics while removing each fishery. Maximum sustainable yields and associated quantities are calculated using the selectivity of each fishery group. Historically, the longline fleets have had the greatest impact on the stock of bigeye tuna, but since about 1993 the purse-seine fleet has increased its impact, and its catches and effect on the stock are currently greater than those of the longline fishery. However, the theoretical long-term yields obtainable from a purse-seine fishery are much less than those obtainable from a longline fishery.
Relation: 99(2), pp.106–111
URI: http://ntour.ntou.edu.tw/handle/987654321/33188
Appears in Collections:[環境生物與漁業科學學系] 期刊論文

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