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Gen Comp Endocrinol

Title:		"Male-typical courtship, spawning behavior, and olfactory sensitivity are induced to different extents by androgens in the goldfish suggesting they are controlled by different neuroendocrine mechanisms"
Author(s):		Ghosal R; Sorensen PW;
Address:		"Department of Fisheries, Wildlife and Conservation Biology, University of Minnesota, St. Paul, MN 55108, USA. Electronic address: rghosal@umn.edu. Department of Fisheries, Wildlife and Conservation Biology, University of Minnesota, St. Paul, MN 55108, USA"
Journal Title:		Gen Comp Endocrinol
Year:		2016
Volume:		20160427
Issue:
Page Number:		160 - 173
DOI:		10.1016/j.ygcen.2016.04.028
ISSN/ISBN:		1095-6840 (Electronic) 0016-6480 (Linking)
Abstract:		"Male-typical reproductive behaviors vary greatly between different species of fishes with androgens playing a variety of roles that appear especially important in the gonochorist cypriniform fishes. The goldfish is an important model for the cypriniformes and while it is clear that male goldfish are fully feminized by prostaglandin F2alpha(PGF2alpha), it is not clear whether females will exhibit normal levels of male-typical reproductive behaviors as well as olfactory function when treated with androgens. To answer this question, we exposed sexually-regressed adult female goldfish to several types of androgen and monitored their tendencies to court (inspect females) and mate (spawn, or attempt to release gametes) while monitoring their olfactory sensitivity until changes in these attributes were maximized. Untreated adult males (intact) were included to determine the extent of masculinization. Treatments included the natural androgens, 11-ketotestosterone and testosterone (KT and T), administered via capsules (KT+T-implanted fish); the artificial androgen, methyltestosterone (MT), administered via capsules (MT-C); and MT administered in the fishes' water (MT-B). Male-typical olfactory sensitivity to a pheromone (15keto-PGF2alpha) increased in all androgen-treated groups and by week 6 was fully equivalent to that of males. Male-typical courtship behavior increased in all androgen-treated groups although slowly, and only MT-B females came to exhibit levels equivalent to those of males after 18weeks. In contrast, male-typical mating activity increased only slightly, with MT-B females reaching levels one-third that of males after 30weeks. We conclude that while androgens fully masculinize olfactory sensitivity and courtship behavior in goldfish, mating behavior is controlled by a different neuroendocrine mechanism(s) that has yet to be fully elucidated"
Keywords:		"Androgens/*metabolism/pharmacology Animals Courtship Female Goldfish/*growth & development Male Reproduction/*drug effects *Sexual Behavior, Animal Smell Androgen Bipotential Masculinization Olfaction Pheromone Spawning;"
Notes:		"MedlineGhosal, Ratna Sorensen, Peter W eng 2016/05/02 Gen Comp Endocrinol. 2016 Jun 1; 232:160-73. doi: 10.1016/j.ygcen.2016.04.028. Epub 2016 Apr 27"