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Incubation Conditions Are More Important in Determining Early Thermoregulatory Ability than Posthatch Resource Conditions in a Precocial Bird

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dc.contributorG. R. Hepp, heppgar@auburn.eduen_US
dc.creatorDuRant, S. E.
dc.creatorHopkins, W. A.
dc.creatorCarter, A. W.
dc.creatorStachowiak, C. M.
dc.creatorHepp, G. R.
dc.description.abstractRecent research in birds suggests that investing in incubation is one mechanism by which parents can enhance the phenotype of their offspring. Posthatch environmental conditions can also shape an individual’s phenotype, and it is thus possible for preand posthatch conditions to have interactive effects on an individual’s phenotype. In this study, we examined the individual and interactive effects of prehatch incubation temperature and posthatch food availability on growth, food consumption, and thermoregulatory ability in wood duck (Aix sponsa) ducklings. Eggs were incubated at one of three temperatures (35.0, 35.9, or 37.0C), and then ducklings were reared on an either ad lib. or time-restricted diet for 12 d after hatching. We found that food availability influenced duckling growth, with the slowest growth occurring in ducklings fed the restricted diet. Incubation temperature also interacted with food conditions to influence duckling growth: ducklings fed ad lib. from the lowest incubation temperature grew slower than ducklings fed ad lib. from the higher incubation temperatures. Most importantly, we found that the improvement in a duckling’s ability to maintain body temperature in the face of a thermal challenge was influenced by embryonic incubation temperature but not feeding conditions. Ducklings from the highest incubation temperature experienced the greatest improvement in thermoregulatory performance with age. Our findings suggest that the prehatch environment is more important than posthatch resource conditions in determining some physiological functions and underscores the important role that incubation temperature plays in determining offspring phenotype in birds.en_US
dc.publisherUniversity of Chicago Pressen_US
dc.relation.ispartofPhysiological and Biochemical Zoologyen_US
dc.rights©The Authors 2013. ©University of Chicago Press 2013. This is this the version of record published by the University of Chicago Press. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: DuRant, S. E., Hopkins, W. A., Carter, A. W., Stachowiak, C. M., & Hepp, G. R. (2013). Incubation conditions are more important in determining early thermoregulatory ability than posthatch resource conditions in a precocial bird. Physiological and Biochemical Zoology, 86(4), 410-420.en_US
dc.titleIncubation Conditions Are More Important in Determining Early Thermoregulatory Ability than Posthatch Resource Conditions in a Precocial Birden_US
dc.type.genreJournal Article, Academic Journalen_US

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