PMID:18211871
| Citation |
Sinervo, B and McAdam, AG (2008) Maturational costs of reproduction due to clutch size and ontogenetic conflict as revealed in the invisible fraction. Proc. Biol. Sci. 275:629-38 |
|---|---|
| Abstract |
Reproduction is thought to entail costs, but assessing survival costs associated with maturation as organisms express reproductive genes for the first time is problematic because many will die prior to expressing a phenotype. We quantified selection acting on this invisible fraction by measuring selection on predicted breeding values for clutch size estimated from a multigenerational pedigree of side-blotched lizards in which clutch size was heritable (h2=0.25+/-0.04). The survival effects of predicted breeding values for clutch size during maturation, however, differed between males and females indicating ontogenetic conflict. Increased mortality during maturation was associated with lower predicted breeding values for clutch size for females, but higher predicted breeding values for males who do not produce a clutch. Genetic correlations between clutch size and male and female survival were consistent with calculated selection differentials. Experimental yolk removal did not affect progeny survival during maturation, indicating that selection on maturing progeny was not due to confounding yolk-volume maternal effects, and hormone manipulations confirmed clutch size as the target of viability selection during maturation. Such episodes of selection prior to phenotypic expression of the trait will have important consequences for the evolution of reproductive investment. |
| Links |
PubMed PMC2596848 Online version:10.1098/rspb.2007.1084 |
| Keywords |
Animals; Breeding; Clutch Size/physiology; Egg Yolk; Female; Follicle Stimulating Hormone/administration & dosage; Hormones/administration & dosage; Lizards/physiology; Male; Ovarian Follicle/surgery; Reproduction/physiology; Selection, Genetic; Sexual Maturation/physiology; Survival Analysis; Zygote |
| edit table |
Significance
You can help EcoliWiki by summarizing why this paper is useful
Useful Materials and Methods
You can help Ecoliwiki by describing the useful materials (strains, plasmids, antibodies, etc) described in this paper.
Annotations
<annotationlinks/>
EcoliWiki Links
Add links to pages that link here (e.g. gene, product, method pages)
References
See Help:References for how to manage references in EcoliWiki.