Abstract

Females of the sevenspine goby Gymnogobius heptacanthus are more colorful and active in courtship display than males. Females tend to exhibit agonistic behavior in female-female competition reaching its highest level in their completed readiness to spawn. In addition, females are sex-role reversed, performing courtship displays. Fish behavioral patterns are rather simple. Thus, the level of male aggression is very low. They do not initiate any courtship display. The spawning ground is not a strictly-guarded site of importance. A small number of male spawners can be a key factor for the sex-role reversal occurrence.

中文翻译：

---

在Sevenspine虾虎鱼，Gymnogobius heptacanthus（Gobiidae）中求爱角色反转

摘要

Sevenspine虾虎鱼Gymnogobius heptacanthus的雌性比雄性更艳丽，活跃于求爱。雌性倾向于在雌性-雌性竞争中表现出激动的行为，达到完全产卵的最高水平。此外，女性的性角色颠倒，表现出求爱的表现。鱼的行为方式非常简单。因此，男性的攻击水平很低。他们不会启动任何求爱显示。产卵场不是严格保护的重要场所。少数雄性产卵器可能是性角色反转发生的关键因素。