Influence of the Hydric Environment on Water Exchange and Hatchlings of Rigid-Shelled Turtle Eggs

Booth, D. T. and Yu, C. Y. (2009) Influence of the Hydric Environment on Water Exchange and Hatchlings of Rigid-Shelled Turtle Eggs. Physiological and Biochemical Zoology, 82 4: 382-387. doi:10.1086/589870

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Author Booth, D. T.
Yu, C. Y.
Title Influence of the Hydric Environment on Water Exchange and Hatchlings of Rigid-Shelled Turtle Eggs
Journal name Physiological and Biochemical Zoology   Check publisher's open access policy
ISSN 1522-2152
Publication date 2009-07
Year available 2008
Sub-type Article (original research)
DOI 10.1086/589870
Open Access Status File (Publisher version)
Volume 82
Issue 4
Start page 382
End page 387
Total pages 6
Place of publication Chicago, IL United States
Publisher University of Chicago Press
Language eng
Subject C1
970106 Expanding Knowledge in the Biological Sciences
060806 Animal Physiological Ecology
Formatted abstract
To examine the possible influence of incubation substrate water potential on rigid‐shelled chelonian eggs and hatchlings, rigid‐shelled eggs from four clutches of Brisbane River turtle (Emydura signata) were incubated buried in vermiculite at water potentials of approximately −100, −350, and −850 kPa, and patterns of egg mass change and hatchling attributes were examined. All eggs hatched successfully, and there was no apparent effect of water potential on incubation period, fresh hatchling mass, hatchling water content, or hatchling size. Clutch of origin also had no apparent effect on these attributes when initial egg mass was used as a covariate. However, clutch of origin affected initial egg mass, and clutch of origin and incubation water potential influenced the amount of water exchanged between the eggs and their environment during incubation and the amount of residual yolk found in hatchlings. Substrate water potential has little effect on hatchling outcomes other than the proportion of yolk converted to hatchling tissue during incubation in the rigid‐shelled eggs of E. signata. It would appear that in general, the substrate water potential during incubation affects the quality of chelonian hatchlings by influencing the amount of yolk converted to hatchling tissue during embryonic development and that this influence is stronger in flexible‐shelled eggs than in rigid‐shelled eggs.
Q-Index Code C1
Q-Index Status Provisional Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Biological Sciences Publications
Ecology Centre Publications
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 3 times in Scopus Article | Citations
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Created: Thu, 03 Sep 2009, 08:04:04 EST by Mr Andrew Martlew on behalf of School of Biological Sciences