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首页> 外文期刊>Aquatic Living Resources >Recruitment of common sardine (Strangomera bentincki) and anchovy (Engraulis ringens) off central-south Chile in the 1990s and the impact of the 1997-1998 El Nino
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Recruitment of common sardine (Strangomera bentincki) and anchovy (Engraulis ringens) off central-south Chile in the 1990s and the impact of the 1997-1998 El Nino

机译：1990年代智利中南部沿海地区的沙丁鱼（Strangomera bentincki）和an鱼（Engraulis ringens）的招募以及1997-1998年厄尔尼诺现象的影响

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The recruitment of Strangomera bentincki (common sardine) and Engraulis ringens (anchovy) and the relationships with oceanographic conditions in the upwelling ecosystem of central-south Chile were investigated from 1990 to 1998, with emphasis on the 1997-1998 El Nifio. Time series of recruitment, biomass, local sea surface temperature, and a coastal upwelling index were used to explore relationships during the spawning (July-August) and pre-recruitment (August-December) periods. The 1997-1998 El Nifio caused physical changes in the small pelagic fish habitat off central-south Chile. Anomalous sea surface temperatures (SST) and upwelling indexes began to be detected from May 1997 and persisted into 1998. Recruitment of common sardine showed significantly negative relationship with SST anomalies during the pre-recruitment period, as well as with the upwelling index during the peak of spawning. However, the recruitment of anchovy did not seem to be affected by the environmental changes observed in the 1990s. Instead, the recruitment rate of anchovy showed negative relationship with the recruitment rate of common sardine. We conclude that the conditions of the 1997-1998 El Nino off central-south Chile affected the survival of common sardine offspring, and that the recruitment success of anchovy could be determined by less-abundant cohorts of common sardine through a biological mechanism of interaction. (C) 2002 Ifremer/CNRS/Inra/IRD/Cemagref/Editions scientifiques et medicales Elsevier SAS. All rights reserved. [References: 43]
机译：1990年至1998年调查了智利中南部上升生态系统中Strangomera bentincki（沙丁鱼）和Engraulis ringens（an鱼）的招募以及与海洋条件的关系，重点是1997-1998 El Nifio。利用募集，生物量，当地海表温度和沿海上升指数的时间序列来研究产卵期（7月至8月）和招募前（8月至12月）之间的关系。 1997-1998年的El Nifio造成智利中南部沿海小中上层鱼类栖息地的物理变化。从1997年5月开始检测到异常的海面温度（SST）和上升趋势指数，并一直持续到1998年。沙丁鱼的招募与入职前的SST异常以及高峰时期的上升指数显着负相关。产卵。但是，an鱼的招募似乎没有受到1990年代观察到的环境变化的影响。相反，of鱼的招募率与普通沙丁鱼的招募率呈负相关。我们得出的结论是，智利中南部海域1997-1998年厄尔尼诺现象的条件影响了普通沙丁鱼后代的存活，an鱼的募集成功可以通过生物学相互作用机制确定的沙丁鱼数量较少。 （C）2002 Ifremer / CNRS / Inra / IRD / Cemagref / Editions scientifiques et medicales Elsevier SAS。版权所有。 [参考：43]

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