Locatello L, Mazzoldi C, Rasotto M B
Dipartimento di Biologia, Università di Padova, 35131 Padova, Italy.
J Exp Zool. 2002 Nov 1;293(6):601-5. doi: 10.1002/jez.10168.
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.
黑口虾虎鱼（Gobius niger）表现出两种不同的雄性交配策略，即亲代雄鱼和偷腥雄鱼。雄鱼会释放一种性信息素，该信息素能够吸引雌鱼，并激发雄鱼之间的攻击性展示行为。这种信息素由中睾腺分泌，中睾腺在亲代雄鱼体内发育良好，而在偷腥雄鱼体内则明显发育不全。我们测量了亲代雄鱼对采取不同繁殖策略的雄鱼精液的行为反应。亲代雄鱼对其他亲代雄鱼的精液会做出刻板的攻击性行为反应，但对偷腥雄鱼的精液则无反应；因此，偷腥雄鱼的精液似乎在信息素方面不明显。
