Folly and fantasy in the analysis of spatial catch rate data

  title={Folly and fantasy in the analysis of spatial catch rate data},
  author={C. Walters},
  journal={Canadian Journal of Fisheries and Aquatic Sciences},
  • C. Walters
  • Published 2003
  • Art, Biology
  • Canadian Journal of Fisheries and Aquatic Sciences
  • 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… CONTINUE READING

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