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Individual variation in thermal performance curves: swimming burst speed and jumping endurance in wild-caught tropical clawed frogs
journal contribution
posted on 2014-06-01, 00:00 authored by Vincent Careau, Peter BiroPeter Biro, C Bonneaud, E B Fokam, A HerrelThe importance of studying individual variation in locomotor performance has long been recognized as it may determine the ability of an organism to escape from predators, catch prey or disperse. In ectotherms, locomotor performance is highly influenced by ambient temperature (Ta), yet several studies have showed that individual differences are usually retained across a Ta gradient. Less is known, however, about individual differences in thermal sensitivity of performance, despite the fact that it could represent adaptive sources of phenotypic variation and/or additional substrate for selection to act upon. We quantified swimming and jumping performance in 18 wild-caught tropical clawed frogs (Xenopus tropicalis) across a Ta gradient. Maximum swimming velocity and acceleration were not repeatable and individuals did not differ in how their swimming performance varied across Ta. By contrast, time and distance jumped until exhaustion were repeatable across the Ta gradient, indicating that individuals that perform best at a given Ta also perform best at another Ta. Moreover, thermal sensitivity of jumping endurance significantly differed among individuals, with individuals of high performance at low Ta displaying the highest sensitivity to Ta. Individual differences in terrestrial performance increased with decreasing Ta, which is opposite to results obtained in lizards at the inter-specific and among-individual levels. To verify the generality of these patterns, we need more studies on individual variation in thermal reaction norms for locomotor performance in lizards and frogs.
History
Journal
OecologiaVolume
175Issue
2Pagination
471 - 480Publisher
SpringerLocation
Heidelberg, GermanyPublisher DOI
ISSN
0029-8549eISSN
1432-1939Language
engPublication classification
C1 Refereed article in a scholarly journal; C Journal articleCopyright notice
2014, SpringerUsage metrics
Categories
Keywords
AnimalsPhysical EnduranceSwimmingTemperatureXenopusScience & TechnologyLife Sciences & BiomedicineEcologyEnvironmental Sciences & EcologyAnuraClimate changeRandom regressionRepeatabilitySiluranaMAXIMAL SPRINT SPEEDLOCOMOTOR PERFORMANCENATURAL-POPULATIONSXENOPUS-LAEVISINTERINDIVIDUAL VARIATIONANTIPREDATOR DISPLAYSLIMNODYNASTES-PERONIIANURAN AMPHIBIANSREACTION NORMSAQUATIC FROGEcology
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