Effects of testosterone administration and gonadectomy on nuptial pad morphology in overwintering male leopard frogs, Rana pipiens

in Amphibia-Reptilia
Restricted Access
Get Access to Full Text
Rent on DeepDyve

Have an Access Token?



Enter your access token to activate and access content online.

Please login and go to your personal user account to enter your access token.



Help

Have Institutional Access?



Access content through your institution. Any other coaching guidance?



Connect

Abstract

Overwintering Rana pipiens were studied to clarify physiological control of the nuptial pad, a digital specialization of male frogs that is used in mating. Testosterone cypionate implants stimulated nuptial pad growth in both castrated and sham-operated males relative to placebo-treated controls. Androgen-induced changes in the nuptial pad simulated seasonal recrudescence, and included significant increases in thickness of both the epidermis and dermis, formation of keratinized epidermal papillae, hypertrophy of the gland epithelium, enlargement of the gland lumina, and cytoplasmic accumulation of secretory product. Castration did not influence the response to testosterone, nor did it markedly affect nuptial pad morphology, probably because the pads were in maximal regression. These findings, in conjunction with previous work, implicate testicular androgens in seasonal cyclicity of the nuptial pad.

Effects of testosterone administration and gonadectomy on nuptial pad morphology in overwintering male leopard frogs, Rana pipiens

in Amphibia-Reptilia

Sections

Information

Content Metrics

Content Metrics

All Time Past Year Past 30 Days
Abstract Views 22 22 9
Full Text Views 58 58 27
PDF Downloads 6 6 2
EPUB Downloads 0 0 0