Title |
Shifty salamanders: transient trophic polymorphism and cannibalism within natural populations of larval ambystomatid salamanders
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Published in |
Frontiers in Zoology, October 2014
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DOI | 10.1186/s12983-014-0076-7 |
Pubmed ID | |
Authors |
Dale M Jefferson, Maud CO Ferrari, Alicia Mathis, Keith A Hobson, Eric R Britzke, Adam L Crane, Andrew R Blaustein, Douglas P Chivers |
Abstract |
Many species of ambystomatid salamanders are dependent upon highly variable temporary wetlands for larval development. High larval densities may prompt the expression of a distinct head morphology that may facilitate cannibalism. However, few studies have characterized structural cannibalism within natural populations of larval salamanders. In this study we used two species of larval salamanders, long-toed (Ambystoma macrodactylum) and ringed salamanders (A. annulatum). Head morphometrics and stable isotopic values of carbon (δ(13)C) and nitrogen (δ(15)N) were used to identify the presence or absence of structural cannibalism. Weather conditions were also analyzed as a potential factor associated with the expression of cannibalistic morphology. |
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