Literaturdatenbank
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Du, W.-G., & Ji, X. (2003). The effects of incubation thermal environments on size, locomotor performance and early growth of hatchling soft-shelled turtles, pelodiscus sinensis. Journal of Thermal Biology, 28(4), 279–286.
Added by: Admin (14 Aug 2008 20:36:22 UTC) Last edited by: Beate Pfau (28 Mar 2010 06:25:27 UTC) |
| Resource type: Journal Article BibTeX citation key: Du2003a View all bibliographic details  |
Categories: General Keywords: Pelodiscus, Pelodiscus sinensis, Schildkröten = turtles + tortoises, Trionychidae, Trionyx, Zeitigung = incubation Creators: Du, Ji Collection: Journal of Thermal Biology |
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| Abstract |
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We incubated eggs of the soft-shell turtle (Pelodiscus sinensis) at constant (ranging from 23°C to 34°C) and fluctuating temperatures (varying from 22.3°C to 32.8°C) to assess influence of incubation thermal environments on duration of incubation, hatching success and hatchling traits likely affecting fitness. Duration of incubation decreased as temperature increased, from 97.2 days at 23°C to 39.4 days at 34°C. Hatching success differed considerably among temperature treatments, with eggs incubated at lowest (23°C) and highest (34°C) temperatures exhibiting much lower hatching success (23°C: 44.0%; 34°C: 73.7%) than did those incubated at intermediate temperatures (81.7–96.9%). Eggs incubated at different temperatures produced hatchlings that differed in both carapace width and body mass, with those incubated at 23°C producing the smallest hatchlings. Hatchlings from different incubation thermal environments did not differ each other in carapace width, but eggs incubated at fluctuating temperatures produced the heaviest hatchlings, which were significantly heavier than those derived from eggs incubated at 24°C, 33°C and 34°C. Within the range from 24°C to 33°C (including fluctuating temperatures), hatchlings from 24°C performed more poorly in the racetrack than did those from higher incubation temperatures. Within the range from 26.5°C to 34°C, hatchlings from 26.5°C grew significantly faster than did those from 34°C. The most noticeable advantage of incubating eggs at the fluctuating temperature regime designed in this study is to widen the range of incubation temperatures yielding larger and well-performed hatchlings.
Added by: Admin Last edited by: Beate Pfau |
| Notes |
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Zusammenfassung in Schildkröten im Fokus 1 (1) 2004
Added by: Sarina Wunderlich Last edited by: Beate Pfau |