Incubation temperature, energy expenditure and hatchling size in the green turtle (Chelonia mydas), a species with temperature-sensitive sex determination

Booth, D. T. and Astill, K. (2001) Incubation temperature, energy expenditure and hatchling size in the green turtle (Chelonia mydas), a species with temperature-sensitive sex determination. Australian Journal of Zoology, 49 4: 389-396. doi:10.1071/ZO01006


Author Booth, D. T.
Astill, K.
Title Incubation temperature, energy expenditure and hatchling size in the green turtle (Chelonia mydas), a species with temperature-sensitive sex determination
Journal name Australian Journal of Zoology   Check publisher's open access policy
ISSN 0004-959X
Publication date 2001-01-01
Year available 2001
Sub-type Article (original research)
DOI 10.1071/ZO01006
Open Access Status Not yet assessed
Volume 49
Issue 4
Start page 389
End page 396
Total pages 8
Editor D. Morton
Place of publication Collingwood
Publisher CSIRO Publishing
Language eng
Subject C1
270799 Ecology and Evolution not elsewhere classified
779903 Living resources (flora and fauna)
Abstract Eggs from the Heron Island, Great Barrier Reef, nesting population of green turtles (Chelonia mydas) were incubated at all-male-determining (26 degreesC) and all-female-determining (30 degreesC) temperatures. Oxygen consumption and embryonic growth were monitored throughout incubation, and hatchling masses and body dimensions were measured from both temperatures. Eggs hatched after 79 and 53 days incubation at 26 degreesC and 30 degreesC respectively. Oxygen consumption at both temperatures increased to a peak several days before hatching, a pattern typical of turtle embryos, and the rate of oxygen was higher at 30 degreesC than 26 degreesC. The total amount of energy consumed during incubation, and hatchling dimensions, were similar at both temperatures, but hatchlings from 26 degreesC had larger mass, larger yolk-free mass and smaller residual yolks than hatchlings from 30 degreesC. Because of the difference in mass of hatchlings, hatchlings from 30 degreesC had a higher production cost.
Keyword Zoology
Chelydra-serpentina
Snapping Turtles
Oxygen-consumption
Metabolic-rate
Avian Embryos
Growth
Eggs
Patterns
Water
Differentiation
Q-Index Code C1
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Biological Sciences Publications
Ecology Centre Publications
 
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Created: Wed, 15 Aug 2007, 01:38:56 EST