文献类型： 外文期刊

作者： Yu Yang ¹ ; Sun Peng ² ; Cui He ³ ; Sheng Huaxiang ² ; Zhao Fenfang ² ; Tang Yanli ² ; Chen Zelin ² ;

作者机构： 1.Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Peoples R China

2.Ocean Univ China, Coll Fisheries, Qingdao 266003, Peoples R China

3.Chinese Acad Fishery Sci, Beijing 100141, Peoples R China

关键词： trawling pressure;fish biological characteristics;fishery management

期刊名称：JOURNAL OF OCEAN UNIVERSITY OF CHINA （ 影响因子：0.913； 五年影响因子：1.012 ）

ISSN： 1672-5182

年卷期： 2015 年 14 卷 5 期

页码：

收录情况： SCI

摘要： Long-term fishing pressure affects the biological characteristics of exploited fish stocks. The biological characteristics of hairtail (Trichiurus lepturus) in the East China Sea are unable to recover because of long-term trawling. Fishing induces evolutionary effects on the fish's biological characteristics. Evidence of these changes includes small size at age, a shift to earlier age structure, and early maturation. Natural and artificial selection usually affect the fish's life history. Selection can induce different chances of reproduction, and individual fish can give a different genetic contribution to the next generation. In this study, analysis of time-dependent probability of significance and test of sensitivity were used to explore the effects of fish exploitation rate, mesh size, and heritability with long-term trawling. Results showed that fishing parameters were important drivers to exploited fish population. However, genetic traits altered by fishing were slow, and the changes in biological characteristics were weaker than those caused by fishing selection. Exploitation rate and mesh size exhibited similar evolutionary trend tendency under long-term fishing. The time-dependent probability of significance trend showed a gradual growth and tended to be stable. Therefore, the direction of fishing-induced evolution and successful management of fish species require considerable attention to contribute to sustainable fisheries in China.