摘要
根据1960年、1985年、1998年和2008年4个年份在黄海中南部进行底拖网调查获得的小黄鱼生物学资料,对其生物学特征及其年代际变化进行分析,并运用灰色关联分析法研究摄食等级、渔船功率以及海表温度3个因素对小黄鱼生物学特征年代际变化的影响程度。结果表明,黄海中南部小黄鱼的生物学特征在4个年代间发生了明显变化,其群体结构呈现出小型化、低龄化,生长加快、渐近体长减小、体重生长拐点提前、死亡系数增大。灰色关联分析显示,渔船功率、摄食等级和海表温度与黄海中南部小黄鱼生物学特征年代际变化的关联度分别为0.7238,0.6903,0.6396。综合各因素的关系,捕捞因素是造成小黄鱼生物学特征年代际变化的最主要原因。
Based on the bottom trawl survey in the central and southern Yellow Sea in 1960,1985,1998 and 2008,the decadal changes in population structure and biological parameters of the small yellow croaker Larimichthys polyactis were analyzed,and the gray correlative analysis was used to study the effects of changes in sea water temperature,power of fishing boats and the feeding intensity on the biological parameters.The result showed that a great change had happened in the biological parameters of small yellow croaker during past four decades.The size of individuals from the catch has become smaller and population structure become simple,while the growth speed increased,asymptotic length and the inflexion of weight decreased.The total mortality,natural mortality and fishing mortality were found to have an increasing trend.The gray relationship degrees were 0.7238（power of fishing boats）,0.6903（stomach fullness）,0.6396（temperature） with biological parameters,suggesting that the fishing imposed the strongest impact on decadal changes of the biological parameters.
出处
《生态学报》
CAS
CSCD
北大核心
2010年第24期6854-6861,共8页
Acta Ecologica Sinica
基金
国家重点基础研究规划项目(2006CB400608)
国家自然科学基金项目(30371104,40906086)
山东省泰山学者专项基金
中央级公益性科研院所基本科研业务费专项基金资助
关键词
小黄鱼
生物学特征
灰色关联分析
黄海中南部
Small yellow croaker
biological characteristics
gray correlative analysis
central and southern Yellow Sea
