鱼耳石碳氧同位素在黄、渤海小黄鱼种群识别中的应用

王玉堃; 黄建生; 唐学玺; 金显仕; 孙耀

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WANG Yukun,HUANG Jiansheng,TANG Xuexi,JIN Xianshi,SUN Yao.Stable isotopic composition of otoliths in identification of stock structure of small yellow croaker (Larimichthys polyactis) in China[J].Acta Oceanologica Sinica,2016,35(6):29-33

鱼耳石碳氧同位素在黄、渤海小黄鱼种群识别中的应用

Stable isotopic composition of otoliths in identification of stock structure of small yellow croaker (Larimichthys polyactis) in China

投稿时间：2015-01-25 修订日期：2015-07-31

DOI：10.1007/s13131-016-0868-z

中文关键词: 小黄鱼耳石稳定同位素种群识别

英文关键词:small yellow croaker otolith stable isotope chemistry stock structure

基金项目:

作者	单位	E-mail
王玉堃	中国海洋大学海洋生命学院生态学实验室, 青岛 266003 中国水产科学院黄海水产研究所, 青岛 266071
黄建生	中国海洋大学海洋生命学院生态学实验室, 青岛 266003
唐学玺	中国水产科学院黄海水产研究所, 青岛 266071
金显仕	中国海洋大学海洋生命学院生态学实验室, 青岛 266003
孙耀	中国海洋大学海洋生命学院生态学实验室, 青岛 266003	sunyao@ysfri.ac.cn

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中文摘要:

首次以耳石碳氧同位素组成进行了黄、渤海五个小黄鱼群体(葫芦岛、大鱼岛、青岛、海州湾及大洋港)的种群识别研究。结果发现,不同群体小黄鱼耳石碳氧同位素组成存在显著差异,基于耳石碳氧同位素关联分析可以将黄渤海小黄鱼群体划分为渤海种群、黄海中部种群和南黄海种群,总体判别成功率为85.7%。耳石碳氧同位素关联分析是识别鱼群的一种有效方法,可以为鱼群的研究和管理提供切实的帮助。

英文摘要:

Oxygen and carbon isotope ratios (δ¹⁸O and δ¹³C) in otoliths were used to identify the stock structure of small yellow croaker, Larimichthys polyactis. Otoliths were collected from fish at five locations across the Yellow Sea and the Bohai Sea representing most of their distributional range and fisheries areas. The significant differences in the isotopic signatures showed that the five locations could be chemically distinguished and clearly separated, indicating stock subdivision. Correlation of δ¹⁸O and δ¹³C values suggested that population of L. polyactis could be divided into the Bohai Sea group, the southern Yellow Sea group and the central Yellow Sea group. Discriminant analysis of δ¹⁸O and δ¹³C values demonstrated a high significant difference with 85.7% classification accuracy. The spatial separation of L. polyactis indicated a complex stock structure across the Yellow Sea and the Bohai Sea. These results indicate that optimal fisheries management may require a comprehensive consideration on the current spatial arrangements. This study has provided further evidence that measurement of the stable isotopes ratios in otolith can be a valuable tool in the delineation of fishery management units.

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