Sex-specific regulation of marking behavior by sex hormones and conspecifics scent in tree shrews (Tupaia belangeri)

Physiology & Behavior
D V Holst, F Eichmann

Abstract

In tree shrews (Tupaia belangeri), both males and females mark their surroundings with urine and skin gland secretions. In this study we examined in standard tests the modulation of marking behavior of male and female tree shrews by hormones and chemical signals of conspecifics. Males mark more frequently than females in the absence of conspecific scent. Female scent elicits only low marking responses in both sexes. Male scent stimulates marking of both sexes, with a much higher response in females. Increasing amounts of male scent result in a corresponding increase in marking by females. In contrast, male marking is maximally stimulated by low scent concentrations of male conspecifics, whereas higher scent concentrations inhibit male marking. Gonadectomy diminishes male marking activities under all scent conditions, whereas in females only the response to male scent is reduced. In unscented cages, the low marking activities of castrated males and intact females are stimulated by treatment with testosterone or estradiol. In the presence of male scent, however, only testosterone, but not estradiol, stimulates marking of castrated males. Marking of intact males or females is not increased by either hormone. As this study shows, e...Continue Reading

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Citations

Jan 17, 2004·Journal of the American Academy of Child and Adolescent Psychiatry·Jame Ortiz, Adrian Raine
Jul 9, 2009·Physiological Reviews·Roberto TirindelliAnna Menini
Oct 10, 2006·Die Naturwissenschaften·Gloria Cuenca-Bescós, Juan Rofes
Jul 12, 2018·Journal of Chemical Ecology·Holly A CoombesJane L Hurst

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