Literaturdatenbank
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Spencer, R.-J., & Janzen, F. J. (2011). Hatching behavior in turtles. Integrative and Comparative Biology, (epub. ahead of print).
Added by: Sarina Wunderlich (25 Jun 2011 12:42:13 UTC) |
| Resource type: Journal Article DOI: 10.1093/icb/icr045 BibTeX citation key: Spencer2011 View all bibliographic details  |
Categories: General Keywords: Schildkröten = turtles + tortoises, Zeitigung = incubation Creators: Janzen, Spencer Collection: Integrative and Comparative Biology |
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Views index: 14% Popularity index: 3.5% |
| Abstract |
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Incubation temperature plays a prominent role in shaping the phenotypes and fitness of embryos, including affecting developmental rates. In many taxa, including turtles, eggs are deposited in layers such that thermal gradients alter developmental rates within a nest. Despite this thermal effect, a nascent body of experimental work on environmentally cued hatching in turtles has revealed unexpected synchronicity in hatching behavior. This review discusses environmental cues for hatching, physiological mechanisms behind synchronous hatching, proximate and ultimate causes for this behavior, and future directions for research. Four freshwater turtle species have been investigated experimentally, with hatching in each species elicited by different environmental cues and responding via various physiological mechanisms. Hatching of groups of eggs in turtles apparently involves some level of embryo–embryo communication and thus is not a purely passive activity. Although turtles are not icons of complex social behavior, life-history theory predicts that the group environment of the nest can drive the evolution of environmentally cued hatching.
Added by: Sarina Wunderlich |