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The geography of snake reproductive mode : a global analysis of the evolution of snake viviparity [Global Ecology and Biogeography]

Keywords : cold climate hypothesis, maternal manipulation hypothesis, oviparity, predictability, reproductive mode, seasonality, Serpentes, temperature, viviparity

par Frédéric Magné - publié le

Although most reptiles are oviparous, viviparity is a common mode of reproduction in squamates and has evolved multiple times in different lineages. We test two prevailing hypotheses regarding the biogeography of reptile reproductive modes to evaluate the selective forces driving the evolution of viviparity in snakes. The cold climate hypothesis posits that viviparity is selected for in cold climates, whereas the climatic predictability hypothesis predicts that viviparity is advantageous in seasonal climates.

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