Arginine vasotocin (AVT) triggers courtship behavior without exposure to external stimuli and modulates the olfactory response of male hynobius leechii salamanders

Ja Kyeong Kim, Il Hun Kim, Jun Haeng Heo, Jung Hyun Lee, Nam Yong Ra, Junho Eom, Su Min Jeong, Heon Joo Lee, Daesik Park

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

To study the function of arginine vasotocin (AVT) in a specific courtship behavior (body undulation) in male Hynobius leechii, we injected various doses of AVT or an AVT V1a or V2 receptor antagonist into breeding and non-breeding males. After these injections, we placed the males alone or with breeding females in Petri dishes and measured the incidence and frequency of body undulation. Additionally, to test whether AVT modulates the olfactory response of males, we exposed breeding males that were injected with AVT to female odors and measured the same response. Both breeding and non-breeding males intraperitoneally injected with 50 or 100 g of AVT exhibited body undulation. Additionally, breeding males intraperitoneally injected with 50 or 100 g of AVT exhibited an increased frequency of body undulation when exposed to female odors. The intraperitoneal injection of 5, 25, or 50 g of the AVT V1a or V2 receptor antagonist did not significantly decrease the incidence or frequency of body undulation of 100 g AVT-injected breeding males. However, in a post-hoc experiment, the breeding males that were subcutaneously injected with 100 g of the AVT V1a receptor antagonist exhibited a significant decrease in the frequency of body undulation, induced by exposure to females. Additionally, a central injection of 1 g of AVT into the brain induced body undulation in breeding males. Our results show that AVT not only induces a specific courtship behavior in male H. leechii via AVT V1a receptors but also modulates the olfactory response.

Original languageEnglish
Pages (from-to)929-937
Number of pages9
JournalZoological Science
Volume30
Issue number11
DOIs
Publication statusPublished - 2013 Nov

All Science Journal Classification (ASJC) codes

  • Animal Science and Zoology

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