許建宗臺灣大學:海洋研究所鍾豐駿Chung, Fong-JuingFong-JuingChung2010-05-062018-06-282010-05-062018-06-282008U0001-2507200818453000http://ntur.lib.ntu.edu.tw//handle/246246/181204太平洋黑鮪(Thunnus orientalis)為一種高經濟價值的溫帶鮪類。從1950年代起，即開始對於該資源進行開發利用，而每年的漁獲量也逐漸增加。在北太平洋主要的作業國家有日本、韓國、台灣、美國及墨西哥；而捕撈的漁法有圍網、延繩釣、曳繩釣、一支釣、定置網及拖網。本研究蒐集1952至2006年北太平洋主要漁業的漁獲量(catch)及單位努力漁獲量(CPUE)，利用非平衡生產量模式(non-equilibrium production model)對太平洋黑鮪進行資源評估。計所得T.orientalis的最大持續生產量(MSY)介於19,000至26,000噸之間。利用估計所得的MSY進行15年的模擬，發現若將每年的漁撈水準(catch level)設定大於18,000噸時，15年後的資源量會接近或小於達到MSY所需的資源量(B_MSY)，並且將會大於達到最大持續生產量(MSY)的漁獲死亡率(F_MSY)。因此，建議將T.orientalis的最大容許漁獲量(TAC)設定在小於18,000噸。Pacific bluefin tuna (Thunnus orientalis) is a temperate tuna with highly economic value. The exploitation of Pacific bluefin tuna began in 1950s and was mainly utilized by Japan, Korea, Taiwan, United States of America and Mexico in the North Pacific Ocean and the fishing methods are mainly purse seine, longline, troll, pole and line, set net and trawl. In this study, I gathered catch and CPUE data of these fisheries from 1952 to 2006 and used the non-equilibrium production model for stock assessment of T. orientalis.he estimated maximum sustainable yield (MSY) by non-equilibrium production model is between 19,000 ~ 26,000 metric tons. From projection results, the biomass of T.orientalis would be closer or lower than biomass at MSY (B_MSY) and fishing mortality would exceed fishing mortality at MSY (F_MSY) if catch level greater than 18,000 MT. So suggest setting total allowance catch (TAC) of Pacific bluefin tuna smaller than 18,000 metric tons.中文摘要 i文摘要 iihapter 1: Introduction 1.1 Description of bluefin tuna 1.2 Description of fisheries 1.3 Motivation of the present study 6.4 Objectives of study 8hapter 2: Materials and Methods 9.1 Catch and CPUE indices 9.2 Abundance indices 13.3 ASPIC (A Stock-Production Model Incorporating Covariates ) 14.3.1 Fitting model 16.3.2 Starting guess parameters 18.3.3 Base case 18.4 Sensitive analysis 19.4.1 Catch data aggregated for CPUE indices 19.4.2 Weight of abundance indices 20.4.3 Separated or combined CPUE indices 20.5 Projection 20hapter 3: Results 22.1 Catches and abundance indices 22.2 Generalized production model 23.3 B⁄B_MSY and F⁄F_MSY ratio 25.4 Sensitive analysis 25.5 Projection 25hapter 4: Discussion 27.1 Generalized production model 27.2 B⁄B_MSY and F⁄F_MSY ratio 28.3 Sensitive analysis 29.4 Projection 30eferences 32ables 36igures 49application/pdf2113167 bytesapplication/pdfen-US太平洋黑鮪非平衡生產量模式最大持續生產量最大容許漁獲量Pacific bluefin tunanon-equilibrium production modelmaximum sustainable yieldtotal allowance catch[SDGs]SDG14thesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/181204/1/ntu-97-R95241205-1.pdf