中国水产科学Issue(3)：593-601,9.DOI:10.3724/SP.J.1118.2014.00593
夏季东海太平洋褶柔鱼群体结构的年际变化
Annual variability in population structure of Todarodes pacificus in the East China Sea in summer
摘要
Abstract
We evaluated the population structure dynamics and basic biology of Todarodes pacificus using data col-lected from bottom trawl surveys in the East China Sea during the summers between 2009 and 2012. We estimated the resource density, sex ratio, size structure, and the relationship between mantle length and body weight and mantle length at first maturity in each year. T. pacificus individuals were common but unevenly distributed. The population density was highest in 2009 and lowest in 2010. There was no difference (P>0.05) in the abundance of males and fe-males, with the total sex ratio being 1∶1 in every year. During the summer fishing season, the population of T. pacifi-cus consisted primarily of immature individuals and the dominant mantle length was less than 200 mm. The dominant mantle length was highest in 2012 and lowest in 2011. The relationship between mantle length and body weight was quantified as an exponential growth curve, and there were significant differences among years (P<0.05). The stage of maturity increased with mantle length increasing. The mantle length at first maturity in females was larger than in males. In summary, the population of T. pacificus during the summer fishing season consisted primarily of immature individu-als from the autumn and winter spawning groups, with a low number of small mature individuals from the summer spawning group. We observed intra annual differences in the rate of growth and development and the population struc-ture. Our results provide a theoretical basis for managing the T. pacificus fishery in the East China Sea during the sum-mer fishing season.关键词
太平洋褶柔鱼/东海/群体结构/基础生物学/年际变化Key words
Todarodes pacificus/East China Sea/population structure/basic biology/annual variability分类
农业科技引用本文复制引用
杨林林,姜亚洲,刘尊雷,林楠,李圣法,程家骅..夏季东海太平洋褶柔鱼群体结构的年际变化[J].中国水产科学,2014,(3):593-601,9.基金项目
农业部近海渔业资源监测调查专项(2009-2012) （2009-2012）
公益性行业(农业)科研专项经费项目(201303047) （农业）
中央级公益性科研院所基本科研业务专项资金资助项目(2011T01) （2011T01）
