Sex-reversed dominance and aggression in the cichlid fish Julidochromis marlieri
Sex-reversed dominance and aggression in the cichlid fish Julidochromis marlieri
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丽鱼科鱼类 Julidochromis marlieri 的性别逆转优势和攻击性
DOI：
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发表时间：
2005
影响因子：
0.7
通讯作者：
Jonathan S. F. Lee
中科院分区：
文献类型：
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作者：
G. Barlow;Jonathan S. F. Lee
慈鲷科大型鱼类的拟形繁殖系统是一夫一妻制的双亲对，它们照顾鱼卵，并将照顾延伸到牧养和保护小鱼苗。通常情况下，雄性比他的伴侣大并且支配着她。 Julidochromis marlieri 是一种来自坦噶尼喀湖的非洲丽鱼科鱼，遵循这种模式，但有一个重要的区别：雌性比其配偶大；雌性比它的配偶大；雌性比它的配偶大；雌性比它的配偶大。据报道，一只雌性同时与两只雄性交配（Yamagishi & Kohda 1996）。我们询问雌性是否也会支配她的配偶，就像一妻多夫、性别角色颠倒的鸟类一样。此外，记录攻击性的内在差异将阐明支持一夫一妻制物种配对的行为机制。我们在不同体型的男性和女性之间进行了比赛。当体型相等时，雌性经常赢得比赛。女性也更有可能进入更具攻击性的战斗阶段。因此，在 Julidochromis marlieri 中，优势地位和攻击性是性别逆转的。
The plesiomorphic breeding system of the large fish family Cichlidae is a monogamous, biparental pair that cares for eggs and extends care to shepherding and protecting tiny fry. Typically, the male is larger than his mate and dominates her. Julidochromis marlieri, an African cichlid from Lake Tanganyika, follows this pattern but with an important difference: the female is larger than her mate; one female was reported mated to two males simultaneously (Yamagishi & Kohda 1996). We asked whether the female also dominates her mate, as in polyandrous, sex-role reversed birds. Additionally, documenting an inherent difference in aggressiveness would clarify the behavioral mechanisms that support pair-bonding in monogamous species. We staged contests between males and females of various relative sizes. When equal in size, females regularly won contests. Females were also more likely to initiate advancement to more aggressive stages of the fight. Thus dominance and aggression are sex-reversed in Julidochromis marlieri.