title: Female sexual arousal in amphibians.
abstract: Rather than being a static, species specific trait, reproductive behavior in female amphibians is variable within an individual during the breeding season when females are capable of reproductive activity. Changes in receptivity coincide with changes in circulating estrogen. Estrogen is highest at the point when females are ready to choose a male and lay eggs. At this time female receptivity (her probability of responding to a male vocal signal) is highest and her selectivity among conspecific calls (measured by her probability of responding to a degraded or otherwise usually unattractive male signal) is lowest. These changes occur even though females retain the ability to discriminate different acoustic characteristics of various conspecific calls. After releasing her eggs, female amphibians quickly become less receptive and more choosy in terms of their responses to male sexual advertisement signals. Male vocal signals stimulate both behavior and estrogen changes in amphibian females making mating more probable. The changes in female reproductive behavior are the same as those generally accepted as indicative of a change in female sexual arousal leading to copulation. They are situationally triggered, gated by interactions with males, and decline with the consummation of sexual reproduction with a chosen male. The changes can be triggered by either internal physiological state or by the presence of stimuli presented by males, and the same stimuli change both behavior and physiological (endocrine) state in such a way as to make acceptance of a male more likely. Thus amphibian females demonstrate many of the same general characteristics of changing female sexual state that in mammals indicate sexual arousal.
authors.affiliation: Neuroscience Institute and Center for Behavioral Neuroscience, Georgia State University, Atlanta, GA 30302-5030, USA. wwilczynski@gsu.edu
authors.forename: Walter
authors.initials: W
authors.lastname: Wilczynski
authors.forename: Kathleen S
authors.initials: KS
authors.lastname: Lynch
mesh_terms: D000663:Amphibians / Q000502:physiology*; D000818:Animals; D004967:Estrogens / Q000097:blood / Q000502:physiology; D005260:Female; D008297:Male; D012726:Sexual Behavior, Animal / Q000502:physiology*; D014828:Vocalization, Animal / Q000502:physiology
chemical_list: D004967:Estrogens
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