应用体长结构VPA评估东海西部日本鲭种群资源量  

Assessment on the biomass of Scomber japonicus resources in the western East China Sea by length-structure VPA

作　　者：严利平[1,2] 李建生[1,2] 凌建忠[1,2] 叶孙忠[3] 张洪亮[4] 

机构地区：[1]中国水产科学研究院东海水产研究所,上海200090 [2]农业部海洋与河口渔业重点开放实验室,上海200090 [3]福建省水产研究所,厦门361012 [4]浙江省海洋水产研究所,舟山116113

出　　处：《渔业科学进展》2010年第2期16-22,共7页Progress in Fishery Sciences

基　　金：农业部近海资源监测和调查专项;国家科技支撑计划(2007BAD43B01);中央级公益性科研院所基本科研业务费专项基金(2008M06)共同资助

摘　　要：为了摸清东、黄海日本鲭的资源量和渔业利用状况,以2007年5～12月在东海近海和黄海中南部海域渔获的日本鲭叉长的测定数据为基础材料,结合东、黄海区的渔业产量统计资料,应用体长结构实际种群分析法(VPA)估算了2007年东海西部日本鲭种群的资源量,并分析了该资源的结构和利用程度。结果表明,中国利用东海西部日本鲭种群的年龄结构以当年生幼鱼(31.87%)和1龄鱼(49.90%)为主,现存年平均资源尾数和资源量分别为3.68×109N和39.55×104t;该资源的利用程度处于中度偏低开发状态,最大持续产量(MSY)为24.08×104t,年渔获量已超过MSY,进一步开发利用的潜力不大;禁止利用当年生的幼鱼,能使资源处于更佳状态。通过分析该资源的渔业利用时间和年龄结构,认为年产量即使超过MSY,该资源群体仍能保持相对稳定的状态。Based on the data of fork length of Scomberjaponicus caught in coastal waters of East China Sea and central ＆ southern Yellow Sea from May to December in 2007, and fisheries production statistics of East China Sea and Yellow Sea, the biomass of Scomber japonicus resources in the western East China Sea was evaluated by length-structure VPA method and its actual utilization structure and degree were analyzed. The results showed that the age structure of Scomber japonicus of the western East China Sea populations mainly were 0^＋ year fish （31.87%） and 1^＋ years fish （49.90%）, the current annual resources was in number 3.68×10^9 N and 39.55 × 10^4t in biomass, respectively. The fishery of Scomber japonicus was in the low to moderate degree, and maximum sustainable yield （MSY） is up to 24.08×10^4t. Catch of the year has exceeded MSY, and it can make the resource in a better state if fishing young fish is prohibited. By analyzing its utilization period and age structure of catches, it is suggested that the stock of Scomberjaponicus in the western East China Sea could remain relatively steady, even though the annual yield had exceeded MSY.

关 键 词：东海西部日本鲭种群 体长结构VPA 资源量 最大持续产量 年龄结构 

分 类 号：S932.4[农业科学—渔业资源]