Data from: Maternal investment increases with altitude in a frog on the Tibetan plateau

Wei Chen, David A. Pike, Z. H. Tang, X. G. Fan & Y. Wang
Reproducing females can allocate energy between the production of eggs of different size or number, both of which can strongly influence fitness. Environmental conditions often drive these reproductive tradeoffs, because of direct influences on offspring survival. Many vertebrates show positive relationships between female body size and altitude, resulting in the production of larger clutches at higher altitudes. We report a different tradeoff in the high-altitude endemic frog Rana kukunoris (n=11 populations, 2000-3500 m): females living...
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