Body size, swimming speed, or thermal sensitivity? Predator-imposed selection on amphibian larvae
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- 作者：Lumír Gvoždík ; Radovan Smolinský
- 关键词：Antipredator strategies ; Ichthyosaura ; Newts ; Performance ; fitness ; Predator–prey interaction ; Predator–prey size ratio ; Selection differential ; Selection experiment ; Viability selection
- 刊名：BMC Evolutionary Biology
- 出版年：2015
- 出版时间：December 2015
- 年：2015
- 卷：15
- 期：1
- 全文大小：755 KB
- 刊物主题：Evolutionary Biology; Animal Systematics/Taxonomy/Biogeography; Entomology; Genetics and Population Dynamics; Life Sciences, general;
- 出版者：BioMed Central
- ISSN：1471-2148
文摘
Background Many animals rely on their escape performance during predator encounters. Because of its dependence on body size and temperature, escape velocity is fully characterized by three measures, absolute value, size-corrected value, and its response to temperature (thermal sensitivity). The primary target of the selection imposed by predators is poorly understood. We examined predator (dragonfly larva)-imposed selection on prey (newt larvae) body size and characteristics of escape velocity using replicated and controlled predation experiments under seminatural conditions. Specifically, because these species experience a wide range of temperatures throughout their larval phases, we predict that larvae achieving high swimming velocities across temperatures will have a selective advantage over more thermally sensitive individuals.