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Placental transfer of 3H-oleic acid in three species of viviparous lizards: a route for supplementation of embryonic fat bodies?

Citation

Jones, SM and Swain, R, Placental transfer of 3H-oleic acid in three species of viviparous lizards: a route for supplementation of embryonic fat bodies?, Herpetological Monographs, 2006, (20) pp. 186-193. ISSN 0733-1347 (2006) [Refereed Article]

DOI: doi:10.1655/0733-1347(2007)20[186:PTOHOA]2.0.CO;2

Abstract

We hypothesize that facultative placentrotrophy evolved in viviparous stimulates as a means of supplementing embryonic fat reserves. In this study, we aimed to demonstrate a capacity for placental transfer of lipid in three species of the genus Niveoscincus that differ in degree of placental complexity and in their ability to defer parturition after embryonic development is complete. In Niveoscincus metallicus, we injected gravid females at different stages of gestation with 3H- oleic acid and studied transfer of the radiolabel into maternal and embryonic lipid compartments over time. In a comparative study of N. ocellatus and N. microlepidotus, we measured transfer of 3H- oleic acid after 240 min in females with embryos at stages 39-40 only. For N. metallicus, the time course experiment showed that transfer into the embryos tends to increase with time, and that the transfer ratio is greatest in late-stage embryos. Our results demonstrate that 3H- oleic acid is transferred into embryos, and into embryonic fat bodies, of all three species, but that the magnitude of transfer does not appear to be correlated with placental complexity. © 2006 by The Herpetologists' League, Inc.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Zoology not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Jones, SM (Professor Susan Jones)
Author:Swain, R (Dr Roy Swain)
ID Code:40952
Year Published:2006
Web of Science® Times Cited:9
Deposited By:Zoology
Deposited On:2006-08-01
Last Modified:2012-03-05
Downloads:0

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