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Towards a mechanistic understanding of vulnerability to hook-and-line fishing : boldness as the basic target of angling-induced selection [Evolutionary Applications]

Keywords : angling, catchability, evolutionary change, growth, selection

par Frédéric Magné - publié le

In passively operated fishing gear, boldness-related behaviors should fundamentally affect the vulnerability of individual fish and thus be under fisheries selection. To test this hypothesis, we used juvenile common-garden reared carp (Cyprinus carpio) within a narrow size-range to investigate the mechanistic basis of behavioral selection caused by angling. We focused on one key personality trait (i.e., boldness), measured in groups within ponds, two morphological traits (body-shape and head-shape), and one life-history trait (juvenile growth capacity) and studied mean standardized selection gradients caused by angling.(...)

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