Response of Japanese anchovy (Engraulis japonicus) to the Pacific Decadal Oscillation in the Yellow Sea over the past 400 a

文献类型： 外文期刊

第一作者： Li, Haoyu

作者： Li, Haoyu;Li, Haoyu;Tang, Qisheng;Sun, Yao

作者机构：

关键词： Japanese anchovy; scale deposition rate; population fluctuation; Pacific Decadal Oscillation; Yellow Sea

期刊名称：ACTA OCEANOLOGICA SINICA （ 影响因子：1.369； 五年影响因子：1.467 ）

ISSN： 0253-505X

年卷期：

页码：

收录情况： SCI

摘要： Quantitative identification of long-term changes in the abundance of Japanese anchovy (Engraulis japonicus) in the Yellow Sea is particularly important for understanding evolutionary processes of the Yellow Sea ecosystem. Unfortunately, the driving mechanisms of climate variability on the anchovy are still unclear due to the lack of long-term observational data. In this study, we used the fish scale deposition rate in the central Yellow Sea to reconstruct the time series of the anchovy stock over the past 400 a. On this basis, we further explored the impacts of the Pacific Decadal Oscillation (PDO) on the anchovy. Our results show that the anchovy stock is positively correlated with the PDO on a decadal time scale. In addition, anchovy abundance was relatively high during 1620-1860 AD (the Little Ice Age, LIA), though in a state of constant fluctuation; anchovy abundance maintained at a relatively low level after similar to 1860 AD. In particular, followed by overfishing since the 1980s, the anchovy stock has declined sharply. Based on these findings, we infer that fluctuations of the anchovy stock may be regulated by basin-scale "atmosphere-ocean" interactions. Nevertheless, the role of overfishing should not be ignored.

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