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Egg components and utilization of yolk lipids during development of the flatback turtle Natator depressus

journal contribution
posted on 06.12.2017, 00:00 by Suhashini Hewavisenthi, Clifford Parmenter
The materials and energy invested in each egg by most oviparous reptiles represent the majority of total parental investment in offspring. For Natator depressus from eastern Queensland, Australia, the shell contributed approximately 5%, the albumin 45%, and the yolk 50% to the total egg mass (74g). Water averaged 79% of the total egg mass. Lipids averaged 29% of the total dry mass of the egg and 35% of the yolk dry mass. Eggs of N. depressus contained a high proportion of yolk lipids and water, with greater "parental investment" than those of nonmarine turtles. Approximately 26-27% of lipids in the egg was used for embryogenesis, whereas 73-74% was transferred to the entire hatchling. Initial yolk lipid in the residual yolk was approximately 30-37% but varied with incubation environment. Residual yolk lipids are likely to be used as the immediate energy source for the hatchlings.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

36

Issue

1

Start Page

43

End Page

50

Number of Pages

8

ISSN

0022-1511

Location

USA

Publisher

Society for the Study of Amphibians and Reptiles

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Faculty of Arts, Health and Sciences;

Era Eligible

No

Journal

Journal of herpetology.

Exports

CQUniversity

Exports