Literaturdatenbank
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Clark, N. J., Gordos, M. A., & Franklin, C. E. (2008). Diving behaviour, aquatic respiration and blood respiratory properties: a comparison of hatchling and juvenile australian turtles. Journal of zoology, 275(4), 399–406.
Added by: Admin (17 Aug 2008 19:18:49 UTC) Last edited by: Beate Pfau (28 Dec 2009 18:13:22 UTC) |
| Resource type: Journal Article BibTeX citation key: Clark2008b View all bibliographic details  |
Categories: General Keywords: Chelidae, Chelodina, Chelodina latisternum, Elseya, Elseya albagula, Elusor, Elusor macrurus, Emydura, Physiologie = physiology, Rheodytes, Rheodytes leukops, Schildkröten = turtles + tortoises Creators: Clark, Franklin, Gordos Collection: Journal of zoology |
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| Abstract |
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Australia has a number of bimodally respiring freshwater turtle species that use aquatic respiration to extend their aerobic dive limit. While species variations in reliance on aquatic respiration are reflected in the diving behaviour and ecology of adults, it is unknown whether these relationships also occur in hatchling and juvenile turtles. This study compared the diving behaviour, aquatic respiration and blood respiratory properties of hatchling and juveniles from five species of Australian freshwater turtles: Rheodytes leukops, Elusor macrurus, Elseya albagula, Elseya latisternum and Emydura signata. Both diving behaviour and physiology differed significantly between species as well as age classes. Dive duration in R. leukops was 17 times longer than the other species, with two hatchlings remaining submerged for the entire 72 h recording period. The long dive duration recorded for R. leukops was supported by a high reliance on aquatic respiration (63-73%) and high blood oxygen affinity (P50=17.24 mmHg). A correlation between dive duration, aquatic respiration and blood respiratory properties was not observed in the remaining turtle species where, despite the longer dive duration of Els. albagula and Elu. macrurus compared with Em. signata and Els. latisternum, there was no difference observed in per cent aquatic respiration or blood oxygen affinity between these species. When compared with adult individuals (data from previous studies), dive duration was positively correlated with body size in Em. signata, Els. albagula and R. leukops, but a negative relationship occurred in Els. latisternum and Elu. macrurus.
Added by: Admin Last edited by: Beate Pfau |
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WIF
Added by: Sarina Wunderlich Last edited by: Beate Pfau |