You Go, Gill!

摘要

Behind every male leader, there's a female calling the shots. At least that's true in one type of African fish, according to research that contradicts previous notions about male-determined hierarchy. The cichlid fish Neolamprologus pulcher lives in groups in Lake Tanganyika in southeastern Africa. Each social group contains one breeding pair and about 20 other males and females that look after the young and ward off predators. When the alpha male dies or is displaced, another comes forward to breed with the alpha female.