Prey-switching does not protect a generalist turtle from bioenergetic consequences when its preferred food is scarce

James Van Dyke, Kristen Petrov, Ricky-John Spencer, Natasha Malkiewicz, Jessica Lewis & Claudia Keitel
Background: Optimal foraging theory explains how animals make foraging decisions based on the availability, nutritional content, and handling times of different food types. Generalists solve this problem by consuming a variety of food types, and switch between them with relative ease. Specialists eat few food types, and may starve if those food types are not available. We integrated stable isotope analyses with previously-published stomach contents and environmental data to investigate how the foraging ecologies of...
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