Abstract
Life history theory and empirical studies suggest that large size or earlier metamorphosis are suitable proxies for increased lifetime fitness. Thus, across a gradient of larval habitat quality, individuals with similar phenotypes for these traits should exhibit similar post-metamorphic performance. Here we examine this paradigm by testing for differences in post-metamorphic growth and survival independent of metamorphic size in a temperate (spring peeper, Pseudacris crucifer) and tropical (red-eyed treefrog, Agalychnis callidryas) anuran reared under differing larval conditions. For spring peepers, increased food in the larval environment increased post-metamorphic growth efficiency more than predicted by metamorphic phenotype and led to increased mass. Similarly, red-eyed treefrogs reared at low larval density ended the experiment at a higher mass than predicted by metamorphic phenotype. These results show that larval environments can have delayed effects not captured by examining only metamorphic phenotype. These delayed effects for the larval environment link larval and juvenile life history stages and could be important in the population dynamics of organisms with complex life cycles.
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Acknowledgments
We thank Anssi Laurila and three anonymous reviewers for valuable comments on an earlier version of this manuscript. We thank J. Hite, J. Kraus, K. Grayson, V. Rudolf, K. Warkentin, and R. Niccoli for help during research and manuscript preparation. We thank the Virginia Department of Game and Inland Fisheries (permit number 031450), the Virginia Commonwealth University (VCU) Animal Use and Care Committee (IACUC no. AM10112), the Smithsonian Tropical Research Institute and the Panamanian Autoridad Nacional del Ambiente for permission to conduct this research. Financial support was provided by NSF DEB-0717220, Grants-In-Aid of Research from the National Academy of Science administered by Sigma Xi, the scientific research society, the VCU Rice Center Student Research Funding Grant, and the Smithsonian Tropical Research Institute. The authors declare that all experiments followed the current laws of the countries they were conducted in. This is Rice Center contribution number 013.
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Communicated by Anssi Laurila.
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Van Allen, B.G., Briggs, V.S., McCoy, M.W. et al. Carry-over effects of the larval environment on post-metamorphic performance in two hylid frogs. Oecologia 164, 891–898 (2010). https://doi.org/10.1007/s00442-010-1728-8
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DOI: https://doi.org/10.1007/s00442-010-1728-8