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首页> 外文期刊>ICES Journal of Marine Science >Abundance indices for long-lived tropical snappers: estimating standardized catch rates from spatially and temporally coarse logbook data
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Abundance indices for long-lived tropical snappers: estimating standardized catch rates from spatially and temporally coarse logbook data

机译：长寿命热带鲷鱼的丰度指数：根据时空粗壮的日志数据估算标准化捕获率

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摘要

The Northern Demersal Scalefish Fishery has historically comprised a small fleet (≤ 10 vessels year~(-1)) operating over a relatively large area off the northwest coast of Australia. This multispecies fishery primarily harvests two species of snapper: goldband snapper, Pristipomoides multidens and red emperor, Lutjanus sebae. A key input to age-structured assessments of these stocks has been the annual time-series of the catch rate. We used an approach that combined Generalized Linear Models, spatio-temporal imputation, and computer-intensive methods to standardize the fishery catch rates and report uncertainty in the indices. These analyses, which represent one of the first attempts to standardize fish trap catch rates, were also augmented to gain additional insights into the effects of targeting, historical effort creep, and spatio-temporal resolution of catch and effort data on trap fishery dynamics. Results from monthly reported catches (i.e. 1993 on) were compared with those reported daily from more recently (i.e. 2008 on) enhanced catch and effort logbooks. Model effects of catches of one species on the catch rates of another became more conspicuous when the daily data were analysed and produced estimates with greater precision. The rate of putative effort creep estimated for standardized catch rates was much lower than estimated for nominal catch rates. These results therefore demonstrate how important additional insights into fishery and fish population dynamics can be elucidated from such "pre-assessment" analyses.
机译：从历史上看，北部沉没性鳞鱼渔业由小型船队（≤10船年〜（-1））在澳大利亚西北海岸以外的较大地区作业。这种多品种渔业主要捕捞两种鲷鱼：金带鲷鱼，Pristipomoides multidens和红色皇帝Lutjanus sebae。对这些种群进行年龄结构评估的关键输入是捕获率的年度时间序列。我们采用了将广义线性模型，时空估算和计算机密集型方法相结合的方法，以标准化渔业捕捞率并报告指标的不确定性。这些分析代表了首次标准化捕捞渔获率的尝试之一，并且得到了增强，以进一步获得目标，捕捞努力量数据的时空分辨率以及捕捞量和努力量数据对捕捞渔业动态的时空分辨率的影响。将每月报告的渔获量（即1993年起）的结果与最近（即2008年起）改进的渔获量和努力日志中每日报告的结果进行比较。当分析日常数据并以更高的精度得出估算值时，一种物种的捕获量对另一种物种的捕获率的模型影响变得更加明显。对于标准捕获率，估计的推定努力蠕变率远低于对名义捕获率的估计。因此，这些结果表明，从此类“预评估”分析中可以阐明对渔业和鱼类种群动态的更多重要见解。

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  • 来源
    《ICES Journal of Marine Science》 |2014年第3期|618-627|共10页
  • 作者

    Ross J. Marriott; Michael F. ONeill; Stephen J. Newman; Craig L. Skepper;

  • 作者单位

    Western Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, PO Box 20, North Beach, WA 6920, Australia;

    Department of Agriculture, Fisheries and Forestry, Agri-Science Queensland, Maroochy Research Station, PO Box 5083, Nambour, QLD 4560, Australia;

    Western Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, PO Box 20, North Beach, WA 6920, Australia;

    Western Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, PO Box 20, North Beach, WA 6920, Australia;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    catch rate standardization; commercial logbook; spatio-temporal resolution;

    机译：捕获率标准化;商业日志;时空分辨率;

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