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Correlation between Female Reproductive Condition and Plasma Corticosterone in the Lizard Uta stansburiana
Byron S. Wilson and John C. Wingfield
Vol. 1992, No. 3 (Aug. 18, 1992), pp. 691-697
Stable URL: http://www.jstor.org/stable/1446144
Page Count: 7
You can always find the topics here!Topics: Lizards, Glucocorticoids, Female animals, Corticosterone, Blood plasma, Average linear density, Animal reproduction, Eggs, Body condition, Fat body
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We describe a positive correlation between reproductive condition (=mass of reproductive tissues) and plasma corticosterone (B) level among female lizards (Uta stansburiana). Higher B levels in lizards with greater reproductive masses (i.e., with yolked ovarian follicles or oviducal eggs) do not appear to reflect merely the energetic demands, or "stress," of reproduction. Rather, as has been suggested for other oviparous vertebrates (e.g., fish, amphibians, birds), glucocorticoids may be involved in processes related directly to egg production. As with other vertebrates investigated, the causal link between reproductive condition and glucocorticoid level is obscure.