| WANG Yukun,HUANG Jiansheng,TANG Xuexi,JIN Xianshi,SUN Yao. 2016. Stable isotopic composition of otoliths in identification of stock structure of small yellow croaker (Larimichthys polyactis) in China. Acta Oceanologica Sinica, 35(6):29－33 |
| Stable isotopic composition of otoliths in identification of stock structure of small yellow croaker (Larimichthys polyactis) in China |
| 鱼耳石碳氧同位素在黄、渤海小黄鱼种群识别中的应用 |
| Received:January 25, 2015 Revised:July 31, 2015 |
| DOI：10.1007/s13131-016-0868-z |
| Key words:small yellow croaker otolith stable isotope chemistry stock structure |
| 中文关键词: 小黄鱼 耳石 稳定同位素 种群识别 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | WANG Yukun | Laboratory of Ecology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China | | | HUANG Jiansheng | Laboratory of Ecology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China | | | TANG Xuexi | Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China | | | JIN Xianshi | Laboratory of Ecology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China | | | SUN Yao | Laboratory of Ecology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China | sunyao@ysfri.ac.cn |
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| Abstract: |
| 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. |
| 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。 |
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