【作者】 沃佳； 牟秀霞； 徐宾铎； 薛莹； 张崇良； 任一平；

【Author】 WO Jia;MOU Xiu-Xia;XU Bin-Duo;XUE Ying;ZHANG Chong-Liang;REN Yi-ping;College of Fisheries, Ocean University of China;Qingdao National Laboratory for Marine Science and Technology/Laboratory for Marine Fisheries Science and Food Production Processes;

【机构】 中国海洋大学水产学院； 青岛海洋科学与技术国家实验室/海洋渔业科学与食物产出过程功能实验室；

【摘要】 根据2009-2014年在江苏近海北部海域(34.00?-35.13?N,119.40?-121.50?E)的底拖网调查数据,结合综合性指标和多元统计分析等方法研究了该海域的鱼类群落结构随时间的变化。结果表明:江苏近海海域相对资源量波动较大,站位平均尾数有显著下降。2009年至2014年江苏近海的鱼类群落平均营养级指数在2009-2010年相对较低,2011-2014年在3.70以上波动。2009-2014年鱼类群落的平均个体大小变化趋势与平均营养级基本一致。聚类分析和非度量多维标度排序分析结果将6年时间段大致分为2009-2010年和2011-2014年两个年份组。对前后两个年份组的分析显示,中上层、浮游生物食性鱼类优势度增加,冷温种和本地种优势度下降。本文认为江苏近海海域鱼类群落结构发生了较为明显的演替,并针对演替规律提出了渔业管理的建议,为渔业资源的合理利用提供参考。更多还原

【Abstract】 Based on the data collected from the bottom trawl surveys in the coastal waters of northern Jiangsu Province from 2009 to 2014, multivariate statistical analysis and other integrated indices were used to analyze the variation in the community structure of fish assemblage over time in the waters. The results showed that there were significant fluctuations in the relative density of fish resources in the coastal waters of northern Jiangsu Province. and the mean catch individuals per site showed significant decrease in the survey period. The MTL(mean trophic level) index being relatively low in 2009-2012 and fluctuating above 3.70 in 2011-2014. The mean body weight of fish community increasing between 2009 and 2014, showing a similar tendency with that of MTL index. Cluster analysis and MDS showed that the six survey years could be divided into two subgroup of 2009-2010 and 2011-2014. Further study showed that the pelagic and planktivorous fishes had gradually increased in dominance while cold temperate species and indigenous species had decreased over the years. It is suggested that fish communities in the coastal waters of northern Jiangsu Province underwent a remarkable succession. Advices for the fisheries management in the waters was provided according to the succession pattern, which may contribute to the sustainable utilization of fishery resources..更多还原