Preliminary Study of the Social Behavior of Male Gambusia affinis (Baird and Girard) (Pisces: Poeciliidae) in Aquaria

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Abstract
Male Gambusia affinis spend more time courting stationary females or those swimming slowly than those swimming at a faster speed. During courtship there is considerable interaction with the other fish, and this causes each male to spend only brief periods with each female. Males are highly aggressive toward each other and are submissive to the usually larger females. Aggression between males is significantly reduced in the absence of females.