期刊
HORMONES AND BEHAVIOR
卷 42, 期 2, 页码 109-115出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1006/hbeh.2002.1810
关键词
round goby; Neogobius melanostomus; sex pheromones; steroid; behavior; ventilation; sexual dimorphism; masculinization; methyl-testosterone; androgen
Male round gobies (Neogobius melanostomus) transiently increase their rate of ventilation when exposed to nanomolar concentrations of three putative steroidal pheromones (etiocholanolone, ETIO; estrone, El; estradiol-glucuronide, E2-3g), whereas females exhibit this response only to ETIO. In this study we implanted females with Silastic capsules that were empty (Blank) or filled with methyl-testosterone (MT) to determine whether androgen induces a male-typical pattern of ventilatory response. As with untreated females in our previous studies, Blank females increased ventilation only in response to ETIO. In contrast, MT females tested 2-3 weeks postimplant responded not only to ETIO, but also to E1 and E2-3g. These results provide the first demonstration of an androgen inducing a male-typical behavioral response to a steroidal pheromone in adult female fish. Together with our previous findings of sexually isomorphic sensory responses to steroid odorants, the present results also suggest that a central action of androgen is responsible for sexually dimorphic behavioral responses to putative pheromonal steroids in Neogobius. (C) 2002 Elsevier Science (USA).
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