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Titolo:
Social influences on androgen levels in the Southern leopard frog, Rana sphenocephala
Autore:
Chu, J; Wilczynski, W;
Indirizzi:
Oregon State Univ, Dept Zool, Corvallis, OR 97331 USA Oregon State Univ Corvallis OR USA 97331 pt Zool, Corvallis, OR 97331 USA Univ Texas, Dept Psychol, Austin, TX 78712 USA Univ Texas Austin TX USA 78712 Texas, Dept Psychol, Austin, TX 78712 USA
Titolo Testata:
GENERAL AND COMPARATIVE ENDOCRINOLOGY
fascicolo: 1, volume: 121, anno: 2001,
pagine: 66 - 73
SICI:
0016-6480(200101)121:1<66:SIOALI>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
HORMONE-CONCENTRATING CELLS; TREEFROG HYLA-CINEREA; XENOPUS-LAEVIS; VENTRAL HYPOTHALAMUS; ACOUSTIC MODULATION; NEURAL ACTIVITY; BUFO-JAPONICUS; PREOPTIC AREA; SEX STEROIDS; BRAIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Chu, J Oregon State Univ, Dept Zool, Cordley Hall, Corvallis, OR 97331 USAOregon State Univ Cordley Hall Corvallis OR USA 97331 OR 97331 USA
Citazione:
J. Chu e W. Wilczynski, "Social influences on androgen levels in the Southern leopard frog, Rana sphenocephala", GEN C ENDOC, 121(1), 2001, pp. 66-73

Abstract

Social cues play an important role in modulating neuroendocrine and hormonal states in many vertebrates. Social cues in the form of conspecific advertisement calls have been demonstrated to modulate plasma androgen levels inmale Rana syhenocephala, the Southern leopard frog. Male R. sphenocephala were captured and brought to the laboratory for testing. Animals were exposed to one of two acoustical environments: a recording of an active conspecific breeding chorus or a recording of the same chorus in which all the spectral frequencies had been digitally shifted 500 Hz higher. Following 12 nights of exposure to either stimulus, plasma androgen levels were assessed byradioimmunoassay and gonadal morphology was examined to compare group differences. Plasma levels of dihydrotestosterone were significantly higher in males exposed to the conspecific chorus, compared with males exposed to thealtered version of the chorus. Gonadal morphology did not differ between the two groups. These results suggest that in addition to environmental cuessuch as rainfall and other seasonal changes, social cues may also serve asenvironmental synchronizers among anurans to coordinate reproductive effort, (C) 2001 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 04:02:12