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Ejaculate of sneaker males is pheromonally inconspicuous in the black goby,Gobius niger (Teleostei, Gobiidae)

✍ Scribed by Locatello, L. ;Mazzoldi, C. ;Rasotto, M.B.

Publisher: John Wiley and Sons
Year: 2002
Tongue: English
Weight: 84 KB
Volume: 293
Category: Article
ISSN: 0022-104X
DOI: 10.1002/jez.10168

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✦ Synopsis

Abstract

The black goby, Gobius niger, shows alternative male mating tactics, i.e., parental and sneaker males. Males release a sexual pheromone that attracts females and stimulates aggressive displays in males. This pheromone is produced by the mesorchial gland, a structure well developed in parental males but markedly undeveloped in sneakers. We measured the behavioral response of parental males to the ejaculates of males performing different reproductive tactics. Parental males reacted to the ejaculate of other parental males, with stereotypic aggressive behaviors, but not to the ejaculate of sneakers; consequently sneaker male ejaculate appears to be pheromonally inconspicuous. J. Exp. Zool. 293:601–605, 2002. © 2002 Wiley‐Liss, Inc.

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## Abstract This study focuses on the consequences of the switch of tactic from parasitic to parental male in the black goby, __Gobius niger__ (Teleostei: Gobiidae), a species showing two alternative male mating tactics. Older and larger males defend nests, court, and perform parental care on eggs,