Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Publication Type
- File Type
Articles 1 - 3 of 3
Full-Text Articles in Life Sciences
Sex-Specific Developmental Plasticity In Response To Yolk Corticosterone In An Oviparous Lizard, Tobias O. Uller, Johan Hollander, Lee Astheimer, Mats M. Olsson
Sex-Specific Developmental Plasticity In Response To Yolk Corticosterone In An Oviparous Lizard, Tobias O. Uller, Johan Hollander, Lee Astheimer, Mats M. Olsson
Faculty of Science - Papers (Archive)
Corticosterone exposure during prenatal development as a result of maternal upregulation of circulating hormone levels has been shown to have effects on offspring development in mammals. Corticosterone has also been documented in egg yolk in oviparous vertebrates, but the extent to which this influences phenotypic development is less studied. We show that maternal corticosterone is transferred to egg yolk in an oviparous lizard (the mallee dragon, Ctenophorus fordi Storr), with significant variation among clutches in hormone levels. Experimental elevation of yolk corticosterone did not affect hatching success, incubation period or offspring sex ratio. However, corticosterone did have a sex-specific effect …
Polymorphic Ros Scavenging Revealed By Cccp In A Lizard, Mats Olsson, Mark Wilson, Caroline Isaksson, Tobias Uller
Polymorphic Ros Scavenging Revealed By Cccp In A Lizard, Mats Olsson, Mark Wilson, Caroline Isaksson, Tobias Uller
Mark R Wilson
Ingestion of antioxidants has been argued to scavenge circulating reactive molecules (e.g., free radicals), play a part in mate choice (by mediating access to this important resource), and perhaps increase life span. However, recent work has come to question these relationships. We have shown elsewhere in the polychromatic lizard, Ctenophorus pictus, that diet supplementation of carotenoids as antioxidants does not depress circulating natural reactive oxygen species (ROS) levels and leads to no corresponding improvement of color traits. However, a much stronger test would be to experimentally manipulate the ROS levels themselves and assess carotenoid-induced ROS depression. Here, we achieve this …
Variation In Levels Of Reactive Oxygen Species Is Explained By Maternal Identity, Sex And Body-Size-Corrected Clutch Size In A Lizard, Mark Wilson, Mats Olsson, Tobias Uller, Caroline Isaksson, Beth Mott
Variation In Levels Of Reactive Oxygen Species Is Explained By Maternal Identity, Sex And Body-Size-Corrected Clutch Size In A Lizard, Mark Wilson, Mats Olsson, Tobias Uller, Caroline Isaksson, Beth Mott
Mark R Wilson
No abstract provided.