中文摘要：

氧和碳同位素比率(¹⁸ O 和 ¹³ C ) 在耳石被用来识别小黄 croaker 的股票结构， Larimichthys polyactis。耳石越过黄海和代表大多数他们的分布范围和渔业区域的 Bohai 海在五个地点从鱼被收集。在同位素的签名的重要差别证明五个地点能化学上被区分并且清楚地分开了，显示股票分。¹⁸ O 和 ¹³ C 价值建议了 L 的那张人口。polyactis 能被划分成 Bohai 海组，南部的黄海组和中央黄海组。¹⁸ O 和 ¹³ C 价值与 85.7% 分类精确性表明了高重要的差别。L 的空间分离。polyactis 越过黄海和 Bohai 海显示了复杂股票结构。这些结果显示最佳的渔业管理可以在当前的空间安排上要求全面考虑。这研究提供了在耳石的稳定的同位素比率的测量能是在渔业管理单位的描述的一个珍贵工具的进一步的证据。

英文摘要：

Oxygen and carbon isotope ratios（δ~（18）O and δ~（13）C） 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 δ~（18）O and δ~（13）C 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 δ~（18）O and δ~（13）C 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.