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首页> 外文期刊>Estuarine Coastal and Shelf Science >Climatic regimes and the recruitment rate of anchoveta, Engraulis ringens, off Peru
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Climatic regimes and the recruitment rate of anchoveta, Engraulis ringens, off Peru

机译：秘鲁以外的气候状况和of鱼（Engraulis ringens）的招募率

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摘要

The recruitment rate of Peruvian anchoveta, Engraulis ringens, was studied to test the hypothesis that long-term environmental variation (regime shifts) had a significant impact on density-dependent processes governing the anchovy recruitment during the period 1963-2004. On the basis of previous defined regimes and turning points for the Humboldt Current System, we identified two groups of years for increased recruitment of anchoveta (1963-1971 and 1986-2004), and one unfavorable period (1972-1985). A common intercept and significantly different slopes were found when the recruitment rate was plotted as a function of the spawning stock biomass during those groups of years, suggesting that density-dependent effects on recruitment were affected during different climate regimes. The favorable (unfavorable) regime was characterized by higher (lower) zooplankton volumes, and with a higher frequency of colder (warmer) waters. Dome-shaped relationships between recruitment rate, spawning stock biomass and SST, were detected with a Generalized Additive Model for the favorable regime. Thus, recruitment could be explained by non-linear effects of environmental variables. Ultimately, climatic regimes are affecting the density-dependent effects on recruitment of anchoveta and the mechanisms involved may be associated with changes in the carrying capacity of the spawning habitat of anchoveta off Peru, which in turn are related with the effects of cold and warm regimes.
机译：对秘鲁an鱼Engraulis ringens的招募率进行了研究，以检验以下假设：长期环境变化（政权转移）对1963-2004年期间控制-鱼招募的密度依赖性过程有重大影响。根据洪堡流域系统先前定义的制度和转折点，我们确定了增加groups鱼招募的两组年份（1963-1971年和1986-2004年）和一个不利时期（1972-1985年）。在这些年份中，将招聘率绘制为产卵生物量的函数时，会发现一个常见的截距和明显不同的斜率，这表明在不同气候条件下，对招聘的密度依赖性影响受到影响。有利（不利）机制的特征是浮游动物的体积较高（较低），而冷水（温暖）的频率较高。使用通用加性模型确定了有利条件下的募集率，产卵生物量和SST之间的圆顶形关系。因此，募集可以通过环境变量的非线性影响来解释。最终，气候体制影响到密度依赖性对cho鱼募集的影响，并且所涉及的机制可能与秘鲁外an鱼产卵栖息地的承载力变化有关，而这又与冷，热制度的影响有关。 。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2009年第4期|591-597|共7页
  • 作者

    Sandra M. Cahuin; Luis A. Cubillos; Miguel Niquen; Ruben Escribano;

  • 作者单位

    Programa de Doctorado en Oceanografia, Departamento de Oceanografia, Facultad de Ciencias Naturales y Oceanograficas, Universidad de Conception, Barrio Universitario S/N, Casilla 160-C, Concepcion. Chile;

    Programa de Doctorado en Oceanografia, Departamento de Oceanografia, Facultad de Ciencias Naturales y Oceanograficas, Universidad de Conception, Barrio Universitario S/N, Casilla 160-C, Concepcion. Chile　Departamento de Oceanografia, Laboratorio de Evaluation de Poblationes Marinas (EPOMAR), Universidad de Conception, Barrio Universitario S/N, Casilla 160-C, Conception, Chile;

    Instituto del Mar del Peru (IMARPE), Esquina Camarra y Valle S/N, Apartado 22, Callao, Peru;

    Departamento de Oceanografia, Centro de Investigation Oceanogrdfica en el Patifico Sur Oriental (FONDAP, COPAS), Universidad de Conception, Barrio Universitario S/N, Casilla 160-C, Concepcion, Chile;

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  • 正文语种 eng
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  • 关键词

    recruitment; spawning; anchoveta; zooplankton; climatic regimes; humboldt current system;

    机译：招聘;产卵;cho鱼浮游动物气候状况;洪堡电流系统;

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