Resource-dependent investment in male sexual traits in a viviparous fish

Erika Fernlund Isaksson, Charel Reuland, Ariel Kahrl, Alessandro Devigili & John Fitzpatrick
Exaggerated and conspicuous sexually selected traits are often costly to produce and maintain. Costly traits are expected to show resource-dependent expression, since limited resources prevent animals from investing maximally in multiple traits simultaneously. However, there may be critical periods during an individual’s life where the expression of traits is altered if resources are limited. Moreover, costly sexual traits may arise from sexual selection acting both before (pre-copulatory) and after mating (post-copulatory). Gaining a robust understanding...
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