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首页> 外文期刊>Marine ecology progress series >Are negative intra-specific interactions important for recruitment dynamics? A case study of Atlantic fish stocks
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Are negative intra-specific interactions important for recruitment dynamics? A case study of Atlantic fish stocks

机译：负面的种内相互作用对招聘动态重要吗？大西洋鱼类种群案例研究

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摘要

In fishes, strong year classes can suppress survival of the following year class because of interactions such as cannibalism and between-cohort competition. The incidence of such negative intra-specific interactions in recruitment dynamics was investigated for commercially relevant fish stocks in the Atlantic Ocean using residuals from the Ricker stock-recruitment model. The autocorrelation of recruitment residuals at lags ranging from 1 to 5 yr were computed and examined. The number of stocks that exhibited positive autocorrelation in recruitment residuals decreased with increased lag length. Negative autocorrelation of recruitment residuals at lags were found in a number of stocks from 3 to 5 yr and were interpreted as evidence of cannibalism or intra-specific competition. Autocorrelation analysis of recruitment time-series provides an easy and generally accessible method of detecting negative intra-specific interactions. However, it is a conservative method, especially when stocks have undergone periods of low abundance or are subject to other strong density-dependent or -independent influences. While the majority of stocks studied here did not exhibit evidence for negative intra-specific interactions, our findings nonetheless suggest that cannibalism and competition at high stock levels can have important consequences on the determination of sustainable biomass and harvest levels.
机译：在鱼类中，由于同类相食和群体间竞争等相互作用，强壮的一年级生可以抑制下一年级的生存。使用Ricker种群招聘模型的残差，研究了大西洋中与商业相关的鱼类种群在招聘动态中这种负面的种内相互作用的发生率。计算并检查了滞后1至5年的征募残差的自相关。在招聘残差中表现出正相关的股票数量随着滞后时间的增加而减少。在3到5年的一些种群中发现滞后时的招聘残差为负自相关，并被解释为同类相食或种内竞争的证据。募集时间序列的自相关分析提供了一种检测阴性种内相互作用的简便且通常可访问的方法。但是，这是一种保守的方法，尤其是当股票经历了低丰度时期或受到其他与密度相关或与密度无关的强烈影响时。尽管此处研究的大多数种群并未显示出种内相互作用的负面证据，但我们的发现仍然表明，高种群水平上的自相残杀和竞争可能对确定可持续生物量和收获水平产生重要影响。

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  • 来源
    《Marine ecology progress series》 |2016年第7期|211-217|共7页
  • 作者

    Ricard Daniel; Zimmermann Fabian; Heino Mikko;

  • 作者单位

    Biol Ctr AS CR, Vvi, Inst Hydrobiol, Ceske Budejovice 37005, Czech Republic|Fisheries & Oceans Canada, Gulf Fisheries Ctr, 343 Ave Univ, Moncton, NB E1C 9B6, Canada;

    Univ Bergen, Dept Biol, POB 7803, N-5020 Bergen, Norway|Univ Bergen, Hjort Ctr Marine Ecosyst Dynam, POB 7803, N-5020 Bergen, Norway|Inst Marine Res, POB 1879 Nordnes, N-5817 Bergen, Norway|Hjort Ctr Marine Ecosyst Dynam, POB 1879 Nordnes, N-5817 Bergen, Norway;

    Univ Bergen, Dept Biol, POB 7803, N-5020 Bergen, Norway|Univ Bergen, Hjort Ctr Marine Ecosyst Dynam, POB 7803, N-5020 Bergen, Norway|Inst Marine Res, POB 1879 Nordnes, N-5817 Bergen, Norway|Hjort Ctr Marine Ecosyst Dynam, POB 1879 Nordnes, N-5817 Bergen, Norway;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cannibalism; Intra-specific competition; Recruitment; Population dynamics; Atlantic Ocean;

    机译：食人主义;种内竞争;招聘;人口动态;大西洋;

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