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Induction of Orange Head Coloration and Activation of Courtship and Aggression by Testosterone in the Male Broad-Headed Skink (Eumeces laticeps)

William E. Cooper, Jr., Mary T. Mendonca and Laurie J. Vitt
Journal of Herpetology
Vol. 21, No. 2 (Jun., 1987), pp. 96-101
DOI: 10.2307/1564469
Stable URL: http://www.jstor.org/stable/1564469
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Induction of Orange Head Coloration and Activation of Courtship and Aggression by Testosterone in the Male Broad-Headed Skink (Eumeces laticeps)
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Abstract

Male Eumeces laticeps develop bright orange head coloration during the spring breeding season, when they fight with other males and engage in sexual behavior with females. Outside the breeding season the head color fades and the sexual and agonistic behaviors cease. Intraperitoneal implantation of testosterone propionate in Silastic capsules restores the bright orange head coloration and activates courtship and agonistic behaviors in castrated males.

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