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001-es BibID:	BIBFORM051129
Első szerző:	Tökölyi Jácint (biológus)
Cím:	Climate and mammalian life histories / Jácint Tökölyi, Júlia Schmidt, Zoltán Barta
Dátum:	2014
ISSN:	0024-4066
Megjegyzések:	Mammals display considerable geographical variation in life history traits. To understand how climatic factors might influence this variation, we analysed the relationship between life history traits-adult body size, litter size, number of litters per year, gestation lengh, neonate body mass, weaning age and age at sexual maturity - and several environmental variables quantifying the seasonality and predictability of temperature and precipitation across the distribution range of five terretrial mammal groups. Environmental factors correlated strongly with each other; therefore, we used principal components analysis to obtain orthogonal climatic predictors that could be used in multivariate models. We found that in bats, primates and even-toed ungulates adult body size tends to be larger in species inhabiting cold, dry, seasonal environments, whereas in carnivores and rodents a smaller body size in characteristic of warm, dry environments, suggesting that low food availability might limit adult size. Species inhabiting cold, dry, seasonal habitats have fewer, larger litters and shorter gestation periods; however, annual fecundity in these species is not higher, implying that the large litter size of mammals living at high latitudes is probably a consequence of time constraints imposed by strong seasonality. On the other hand, the number of litters per year and annual fecundity were greater in species inhabiting environments with higher seasonality in precipitation. Lastly, we found little evidence for specific effects of environmental variability. Our results highlight the complex effects of environmental factors in the evolution of life history traits in mammals.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban body size Comparative analysis macroecology predictability reproductive traits seasonality Élettudományok - Biológiai tudományok
Megjelenés:	Biological Journal of the Linnean Society. - 111 (2014), p. 719-736. -
További szerzők:	Schmidt Júlia Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:	MTA-DE Lendület MTA Viselkedésökológiai Kutatócsoport
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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