Literaturdatenbank
Literaturdatenbank |
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Packard, G. C., Taigen, T. L., Packard, M. J., & Boardman, T. J. (1981). Changes in mass of eggs of softshell turtles (trionyx spiniferus) incubated under hydric conditions simulating those of natural nests. Journal of Zoology, London, 193, 81–90.
Added by: Admin (24 Aug 2008 19:37:46 UTC) Last edited by: Beate Pfau (16 Aug 2009 07:51:45 UTC) |
| Resource type: Journal Article BibTeX citation key: Packard1981c View all bibliographic details  |
Categories: General Keywords: Apalone, Apalone spinifera, Haltung = husbandry, Schildkröten = turtles + tortoises, Trionychidae, Zeitigung = incubation Creators: Boardman, Packard, Packard, Taigen Collection: Journal of Zoology, London |
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| Abstract |
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Trionychidae Apalone spinifera When hard, calcareous eggs of softshell turtles (Trionyx spiniferus) were incubated on substrates of vermiculite differing in water potential, eggs on all but the wettest of substrates declined in mass throughout incubation. However, rates of decline in mass were lower for eggs incubated on relatively wet substrates than for those incubated on drier substrates. Because all eggs probably experienced similar rates of transpirational water loss from that part of their shell exposed to the nest atmosphere, the several patterns of change in mass manifested by incubating eggs are attributable to different rates of water absorption from the substrate. Neither hatching success nor size of hatchlings was correlated with wetness of the substrate upon which eggs were incubated. Added by: Admin Last edited by: Beate Pfau |