印度洋长鳍金枪鱼资源评估  

Stock assessment of albacore Thunnus alalungain the Indian Ocean

作　　者：朱江峰[1] 戴小杰[1] 官文江[1] 

机构地区：[1]大洋渔业资源可持续开发省部共建教育部重点实验室国家远洋渔业工程技术研究中心农业部大洋渔业资源环境科学观测实验站上海海洋大学海洋科学学院,201306

出　　处：《渔业科学进展》2014年第1期1-8,共8页Progress in Fishery Sciences

基　　金：上海市教委科研创新项目(12YZ134);农业部金枪鱼科学观察员项目共同资助

摘　　要：本研究运用年龄结构资源评估模型ASAP,利用最新的渔业数据和生物学研究成果,对印度洋长鳍金枪鱼资源进行了评估。结果显示,主要资源变量捕捞死亡系数(F)、产卵亲体生物量(SSB)和生物学参考点受亲体-补充量关系的陡度参数(h)的影响很大。假设陡度参数h=0.7、0.8、0.9时,最大持续产量(MSY)分别为25 268t、27 414t、51 924t,当前(2010年初)F与FMSY之比分别为2.85、2.32、1.11,当前渔获量与MSY之比分别为1.65、1.52、0.80。1984年以来,F总体处于上升趋势,SSB处于下降趋势。基本模型条件下(h=0.8),当前资源状况为"趋向于过度捕捞"(Overfishing),且已接近于"过度捕捞"(Overfished)。若h=0.7、h=0.9,当前资源状况分别为"捕捞过度"、"趋向于过度捕捞"。Albacore Thunnus alalunga is one of the main tuna species in the Indian Ocean （IO）. The stock status of IO albacore was uncertain due to the lack of reliable data. We as- sessed the albacore based on the most recent available fishery data and biological information u- sing an age-structured assessment program （ASAP）. The estimated fishing mortality （F）, spawning stock biomass （SSB） and biological reference points were sensitive to the assumed steepness （h） in stock-recruitment relationship. At the assumption of h=0.7, 0.8 （base-case） and 0.9, the maximum sustainable yield （MSY） was 25 268 t, 27 414 t and 51 924 t; the ratio of current （year 2010） F to FMsyWaS 2. 85, 2. 32 and 1. 11; and the ratio of current catch to MSY was 1.65, 1.52 and 0.80, respectively. The F value has been increasing and SSB value has been decreasing since 1984. At the base-case（h=0.8）, the current stock status was ＂overfishing＂ and approaching to ＂overfished＂. At the sensitivity analyses of h = 0.7 and 0.9, the current stock status was ＂overfished＂ and ＂overfishing＂, respectively.

关 键 词：长鳍金枪鱼 资源评估 管理 印度洋 

分 类 号：S963.7[农业科学—水产养殖]