Folly and fantasy in the analysis of spatial catch rate data
Folly and fantasy in the analysis of spatial catch rate data
复制标题
空间捕获率数据分析中的愚蠢和幻想
DOI：
10.1139/f03-152
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发表时间：
2003
影响因子：
2.4
通讯作者：
C. Walters
中科院分区：
文献类型：
--
作者：
C. Walters
每次努力渔获量的空间数据可提供有用的种群趋势指数，但前提是对这些指数进行平均，以便纠正捕捞活动分布变化的影响。在这种分析中不应该使用简单的、非空间的比率估计。任何时间段的平均值都必须对尚未或不再捕捞的空间地层的渔获率做出一些假设。忽视未捕捞层(仅在已捕捞区域平均)相当于假设它们的行为与已捕捞层相同，并可能导致在大片区域内逐渐发展的渔业丰度指数严重过度枯竭。
Spatial catch per effort data can provide useful indices of population trends provided that they are averaged so as to correct for effects of changes in the distribution of fishing activity. Simple, nonspatial ratio estimates should not be used in such analyses. The averaging for any time period must necessarily make some assumptions about what catch rates would have been in spatial strata that had not yet, or were no longer, being fished. Ignoring the unfished strata (averaging only over the areas that were fished) amounts to assuming that they behaved the same as the fished strata and can lead to severe hyperdepletion in abundance indices for fisheries that developed progressively over large regions.