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首页> 外文期刊>ICES Journal of Marine Science >Hierarchical analysis of a remote, Arctic, artisanal longline fishery
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Hierarchical analysis of a remote, Arctic, artisanal longline fishery

机译：偏远北极手工延绳钓渔业的层次分析

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摘要

This is the first paper to explore trends in catch per unit effort (cpue) through time of a Greenland halibut Reinhardtius hippoglossoides stock targeted by an artisanal, winter fishery in Cumberland Sound on southern Baffin Island, Canada. We modelled cpue data from 1987 to 2003, looking at two questions: what factors have driven cpue trends, and is cpue an accurate index of a stock's abundance? In the context of limited data availability, we used generalized linear models (GLMs) and hierarchical models to assess important predictors of cpue. Hierarchical models with multiple fixed environmental effects contained fishing location or individual fisher as random effects. A month effect showed greatest catch rates during February and March; the monthly North Atlantic Oscillation index was positively associated with catch rates; and a change from decreasing to increasing cpue after 1996 was linked to reduced fishery participation following a large storm. The best Akaike's information criterion-ranked CLM identified a negative relationship of cpue with shark bycatch. Although data limitations precluded conventional stock assessment, our models implicated the environment and fisher behaviour as drivers of cpue trends. Additionally, using multiple hierarchical models to predict cpue provided a more informative analysis for understanding trends in cpue than a GLM alone.
机译：这是第一篇探讨格陵兰大比目鱼Reinhardtius hippoglossoides种群在加拿大巴芬岛南部坎伯兰峡的冬季手工捕捞过程中单位捕捞量（cpue）趋势的论文。我们对1987年至2003年的cpue数据进行了建模，着眼于两个问题：哪些因素驱动了cpue趋势，并且cpue是股票丰度的准确指数吗？在数据可用性有限的情况下，我们使用广义线性模型（GLM）和分层模型来评估cpue的重要预测因子。具有多个固定环境影响的层次模型包含捕鱼位置或单个渔民作为随机影响。一个月的影响显示2月和3月的捕获率最高；每月北大西洋涛动指数与捕获率呈正相关； 1996年后从cpue减少到增加的变化与大风暴后渔业参与减少有关。最好的Akaike信息准则等级CLM确定了cpue与鲨鱼兼捕的负相关关系。尽管数据有限，无法进行常规种群评估，但我们的模型将环境和渔民行为作为线索趋势的驱动因素。此外，与单独使用GLM相比，使用多个层次模型预测cpue提供了更多信息分析来了解cpue趋势。

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  • 来源
    《ICES Journal of Marine Science》 |2010年第1期|41-51|共11页
  • 作者

    Susan T. Dennard; M. Aaron MacNeil; Margaret A. Treble; Steven Campana; Aaron T. Fisk;

  • 作者单位

    Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, ON, Canada N9B 3P4;

    Australian Institute of Marine Science, PMB 3 Townsville MC, Townsville 4870, Queensland, Australia;

    Freshwater Institute, Canada Department of Fisheries and Oceans, Arctic Aquatic Research Division, 507 University Crescent, Winnipeg Canada MB R3T 2N6;

    Bedford Institute of Oceanography, Canada Department of Fisheries and Oceans, Eastern Scotian Shelf, 1 Challenger Drive, Dartmouth, NS, Canada B2Y 4A2;

    Great Lakes Institute for Environmental Research, University of Windsor, 401 Sunset Avenue, Windsor, ON, Canada N9B 3P4;

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

    catch per unit effort; cumberland sound; greenland halibut; mixed effects models; North atlantic oscillation;

    机译：捕捉每单位努力;坎伯兰声音格陵兰大比目鱼混合效应模型;北大西洋振荡;

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