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Correlation between Female Reproductive Condition and Plasma Corticosterone in the Lizard Uta stansburiana

Byron S. Wilson and John C. Wingfield
Copeia
Vol. 1992, No. 3 (Aug. 18, 1992), pp. 691-697
DOI: 10.2307/1446144
Stable URL: http://www.jstor.org/stable/1446144
Page Count: 7
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Correlation between Female Reproductive Condition and Plasma Corticosterone in the Lizard Uta stansburiana
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Abstract

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.

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