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Body size, swimming speed, or thermal sensitivity? Predator-imposed selection on amphibian larvae
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SYSNO ASEP 0449682 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Body size, swimming speed, or thermal sensitivity? Predator-imposed selection on amphibian larvae Tvůrce(i) Gvoždík, Lumír (UBO-W) RID, ORCID, SAI
Smolinský, Radovan (UBO-W) RID, SAI, ORCIDCelkový počet autorů 2 Číslo článku 238 Zdroj.dok. BMC Evolutionary Biology. - : BioMed Central - ISSN 1471-2148
Roč. 15, č. 1 (2015)Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Antipredator strategies ; Ichthyosaura ; Newts ; Performance-fitness ; Predator–prey interaction ; Predator–prey size ratio ; Selection differential ; Selection experiment ; Viability selection Vědní obor RIV EG - Zoologie CEP GAP506/10/2170 GA ČR - Grantová agentura ČR GA15-07140S GA ČR - Grantová agentura ČR Institucionální podpora UBO-W - RVO:68081766 UT WOS 000364184200002 EID SCOPUS 84959091711 DOI 10.1186/s12862-015-0522-y Anotace 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. Nonzero selection differentials indicated that predators selected for prey body size and both absolute and size-corrected maximum swimming velocity. Comparison of selection differentials with control confirmed selection only on body size, i.e., dragonfly larvae preferably preyed on small newt larvae. Maximum swimming velocity and its thermal sensitivity showed low group repeatability, which contributed to non-detectable selection on both characteristics of escape performance. In the newt-dragonfly larvae interaction, body size plays a more important role than maximum values and thermal sensitivity of swimming velocity during predator escape. This corroborates the general importance of body size in predator–prey interactions. The absence of an appropriate control in predation experiments may lead to potentially misleading conclusions about the primary target of predator-imposed selection. Insights from predation experiments contribute to our understanding of the link between performance and fitness, and further improve mechanistic models of predator–prey interactions and food web dynamics. Pracoviště Ústav biologie obratlovců Kontakt Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Rok sběru 2016
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