Adaptive accuracy of temperature oviposition preferences in newts

0337625 - ÚBO 2011 RIV NL eng J - Journal Article
Dvořák, J. - Gvoždík, Lumír
Adaptive accuracy of temperature oviposition preferences in newts.
Evolutionary Ecology. Roč. 24, č. 5 (2010), s. 1115-1127. ISSN 0269-7653. E-ISSN 1573-8477
R&D Projects: GA ČR GA206/06/0953; GA MŠMT LC06073
Institutional research plan: CEZ:AV0Z60930519
Keywords : maternal effect * oviposition-site choice * predictability of thermal environment * temporary waters * thermal adaptation
Subject RIV: EG - Zoology
Impact factor: 2.398, year: 2010

Oviposition-site choice has profound fitness consequences for both a mother and her offspring. The adaptive significance of oviposition behaviour for both generations depends on two rarely considered assumptions: (1) the fit of maternal oviposition preferences with local phenotypic optimum (adaptive accuracy) and (2) the predictability of future conditions for developing offspring based on conditions at the time of oviposition. We examined both assumptions using temperature oviposition preferences (/T/_p,o ) in the alpine newt, /Ichthyosaura /(formerly /Triturus/)/ alpestris/. Analyses of temperature time series in the newt natural environment revealed that (1) /T/_p,o were closer to phenotypic optima at the water surface than at the maximal depth (bottom) and (2) bottom thermal conditions were more predictable than those at the water surface. We concluded that female newts have to trade the adaptive accuracy of /T/_p,o for the predictability of future thermal conditions at the time of oviposition.
Permanent Link: http://hdl.handle.net/11104/0181576