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Life-history and activity shape catchability in a sedentary fish

机译：久坐不动鱼类的生活史和活动形状可捕获性

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摘要

Catchability, a key parameter in stock assessment, is often considered constant in time and space. However, when fishing with passive gears like traps or gillnets, fish behavior determines the odds of encounter with the fishers and thus catchability. Few studies have presented comprehensive empirical evidence of the link between behavior measured in the wild and catchability from a life-history strategy perspective. Here, a suite of different variables, including environmental cues, physiological states, fish activity, home range and catchability, were modeled using a sinusoidal function to describe their seasonality over the year and the degree of coupling among them in a sedentary coastal fish (Labrus bergylta). All the variables except the home range size showed a significant variation over the year, following a sinusoidal pattern. The models showed a tight match between the seasonality of catchability and fish activity, with high values of both variables occurring in late spring to early summer, when the highest levels of feeding and the period of reproductive inactivity occurred. Lower catchability values were predicted in late autumn to early winter, coinciding with the spawning season and the associated reduced activity. This integrative research shows that the spatio-temporal dimension of fish life-history strategy has a key role in shaping catchability even in highly sedentary species. Time-varying catchability needs to be incorporated into stock assessment models that aim to accurately describe fish population health and to estimate abundance indices.
机译：可捕获性是库存评估中的关键参数，通常被认为在时间和空间上是恒定的。但是，当使用诸如诱捕器或刺网之类的被动装置捕鱼时，鱼类的行为决定了与渔民相遇的几率，从而决定了其可捕性。很少有研究提供全面的实证证据，从生命历史策略的角度来看野外测量的行为与可捕获性之间的联系。在这里，使用正弦函数对一组变量进行了建模，包括环境提示，生理状态，鱼类活动，住所范围和可捕捞性，以描述它们一年四季的季节性以及它们在久坐的沿海鱼类中的耦合程度（拉布鲁斯bergylta）。除家庭范围大小外，所有变量均呈正弦曲线型变化，且一年中变化很大。这些模型显示出可捕获性与鱼类活动之间的紧密联系，在春季末至夏季初这两个变量的值都很高，这时发生了最高的摄食水平和生殖活动期。预计在秋末至冬初会出现较低的可捕获性值，这与产卵季节及相关的活动减少相吻合。这项综合研究表明，即使在高度久坐的物种中，鱼类生活史策略的时空维度对塑造可捕性也具有关键作用。需要将随时间变化的可捕获性纳入种群评估模型，以准确描述鱼类种群健康并估计丰度指数。

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  • 来源
    《Marine ecology progress series》 |2014年第18期|239-250|共12页
  • 作者

    David Villegas-Rios; Josep Aids; Miquel Palmer; Susan K. Lowerre-Barbieri; Rafael Banon; Alexandre Alonso-Fernandez; Fran Saborido-Rey;

  • 作者单位

    Institute de Investigacions Marinas (IIM-CSIC), 36208 Vigo, Spain,Flodevigen Marine Research Station, Institute of Marine Research (IMR), 4817 His, Norway;

    Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Mueggelseedamm 310, 12587 Berlin, Germany;

    Instituto Mediterraneo de Estudios Avanzados (CSIC-UIB), 07190 Esporles, Spain;

    Florida Fish and Wildlife Conservation Commission, Florida Fish and Wildlife Research Institute, St. Petersburg, Florida 33711, USA;

    Servizo de Planificacion, Direccion Xeral de Desenvolvemento Pesqueiro, Conselleria do Mar e Medio Rural (Xunta de Galicia), 15701 Santiago de Compostela, Spain;

    Institute de Investigacions Marinas (IIM-CSIC), 36208 Vigo, Spain;

    Institute de Investigacions Marinas (IIM-CSIC), 36208 Vigo, Spain;

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  • 正文语种 eng
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  • 关键词

    Feeding; Fish activity; Home range; Movement ecology; Reproduction; Seasonality; Sedentary fish; Vulnerability;

    机译：馈送;鱼类活动;家庭范围运动生态学;再生产;季节性;久坐的鱼;脆弱性;

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