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- W2726872006 abstract "Predicting the magnitude and nature of changes in a species’ range is becoming ever more important as an increasing number of species are faced with habitat changes or are introduced to areas outside of the species’ native range. An organism’s investment in life-history traits is expected to change during range shifts or range expansion because populations encounter new ecological conditions. While simulation studies predict that dispersal and reproductive allocation should increase at the range edge, we suggest that reproductive allocation might decrease at the range edge due to energy allocation trade-offs. We studied the reproductive investment of an invasive amphibian, Xenopus laevis, and measured reproductive allocation in three clusters of populations distributed from the centre to the edge of the colonized range of X. laevis in France. Resource allocation was estimated with the scaled mass index of gonads of both sexes during the local period of reproduction of the species. The level of resources allocated to reproduction was lower at the periphery of the colonized range compared to the centre and may be the result of changes in trade-offs between life-history traits. Such a pattern could be explained by interspecific competition or enhanced investment in dispersal capacity." @default.
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- W2726872006 date "2017-06-29" @default.
- W2726872006 modified "2023-10-12" @default.
- W2726872006 title "Resources allocated to reproduction decrease at the range edge of an expanding population of an invasive amphibian" @default.
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- W2726872006 doi "https://doi.org/10.1093/biolinnean/blx048" @default.
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