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Published on: September 16, 2018
Examining the link between dietary specialization and foraging modes of stream-dwelling brown trout Salmo trutta
Javier Sánchez-Hernández1, Fernando Cobo1,2
1Departamento de Zooloxía, Xenética e Antropoloxía Física, Facultade de Bioloxía, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
Abstract:
The aim of this study was to explore differences in dietary specialization across two foraging modes (benthic v. surface-drift foraging) of stream-dwelling brown trout Salmo trutta. The degree of inter-individual niche variation within each foraging mode was high, but the dietary specialization was maintained between foraging modes. This study supports the view that if aquatic invertebrates are more abundant and accessible than surface prey, the individuals will not specialize on surface prey (surface-drift foraging).
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