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Keywords: Testosterone
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Journal Articles
Brain Behav Evol (2016) 87 (3): 175–183.
Published Online: 24 August 2016
... that are reviewed here are: enriched environment, social stimulation, spatial area use, season, photoperiod and temperature, and testosterone. Fewer data are available for amphibians than for reptiles, but for both groups many issues are still to be resolved. It is to be hoped that the questions raised here...
Journal Articles
Brain Behav Evol (2015) 86 (2): 110–121.
Published Online: 08 October 2015
... of the SCN and song behavior are primarily mediated by testosterone (T) and its metabolites in most species studied thus far. However, the majority of bird species are tropical and have less pronounced seasonal reproductive cycles. We have previously documented that equatorial rufous-collared sparrows...
Journal Articles
Brain Behav Evol (2012) 80 (3): 222–232.
Published Online: 17 August 2012
... by melatonin may be sexually dimorphic. Finally, melatonin did not significantly influence testosterone or estradiol concentrations of male or female frogs, respectively, suggesting that the effects of melatonin on AVT immunoreactivity are independent of changes in gonadal sex steroid hormones. Collectively...
Journal Articles
Brain Behav Evol (2012) 79 (3): 170–180.
Published Online: 20 January 2012
... proliferation can occur without gonadal hormone involvement in either male or female adult anuran amphibians, and confirms that it is independent of a behavioral response in males. Amphibian Cell proliferation BrdU Neurogenesis Acoustic communication Social behavior Estrogen Testosterone...
Journal Articles
Brain Behav Evol (2011) 76 (3-4): 279–288.
Published Online: 30 November 2010
...Rachel E. Cohen; Juli Wade The 5α-reductase (5αR) enzyme converts testosterone to 5α-dihydrotestosterone. This local metabolism within the brain is important for the full expression of male sexual behavior in many species, including green anole lizards. Two isozymes of 5αR exist and little is known...
Journal Articles
Journal Articles
Journal Articles
Brain Behav Evol (1993) 42 (4-5): 242–251.
Published Online: 23 January 2008
... as Model Systems for Studying Long-Term Steroid Action on Neural Circuits Key Words Electric organ discharge Testosterone Estrogen Na * current Abstract Weakly electric fish generate electric organ discharges (EODs) that are speciesspecific and often sexually-dimorphic. The waveform or frequency of an EOD...
Journal Articles
Brain Behav Evol (2005) 65 (4): 268–277.
Published Online: 15 April 2005
...Cynthia Corbitt; Pierre Deviche In seasonally breeding adult male songbirds, the volumes of several song control regions (SCRs) change seasonally in parallel with plasma testosterone (T) levels and decrease following gonadectomy. Testosterone treatment to castrates prevents this decrease...
Journal Articles
Brain Behav Evol (2003) 61 (4): 184–194.
Published Online: 12 June 2003
...Michael J. Watt; Gina L. Forster; Jean M.P. Joss Male jacky dragons, Amphibolurus muricatus , indicate territoriality to rivals during the mating season through the use of stereotyped motor displays. The relationship between corticosterone (B) and testosterone (T) and its effects on territorial...
Journal Articles
Brain Behav Evol (2001) 57 (5): 239–251.
Published Online: 18 October 2001
... that testosterone regulates territorial aggression in males during the breeding season, the correlation of plasma testosterone and aggression appears to be limited to periods of social instability when a male is challenged for his territory by another male, or when mate-guarding a sexually receptive female. How...
Journal Articles
Journal Articles
Brain Behav Evol (1999) 54 (1): 61–69.
Published Online: 16 September 1999
... sensitive to steroids in these species. The profile of plasma steroids in both species is typical for teleosts. Males of both species have higher plasma levels of the androgen 11 ketotestosterone (11 KT) than females [Zucker, 1997; Dunlap et al., 1998]. Both sexes have similar levels of testosterone (T...
Journal Articles
Brain Behav Evol (1999) 54 (1): 15–27.
Published Online: 16 September 1999
... are controlled by exposure to gonadal steroid hormones, either during ontogeny or in adulthood. This article reviews some of the evidence supporting the hypothesis that in mammals, testosterone or its metabolites regulate the structure and function of neural and muscle systems involved in the control...