Social control of terminal phase transition in primary males of the diandric wrasse, Halichoeres poecilopterus (Pisces: Labridae)
Social control of terminal phase transition in primary males of the diandric wrasse, Halichoeres poecilopterus (Pisces: Labridae)
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DOI：
10.1007/s10164-006-0207-5
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发表时间：
2007-01-01
影响因子：
0.9
通讯作者：
Gushima, Kenji
中科院分区：
文献类型：
--
作者：
Sakai, Yoichi;Kuniyoshi, Hisato;Gushima, Kenji
在许多双头鱼，大领土男性明亮的身体着色（终端阶段（TP）男性）来自初始阶段（IP）女性改变性别的男性或IP主要男性改变颜色和行为，但不改变性别。控制IP初级雄性向TP雄性转变的机制还不清楚。我们进行了同居实验，以研究社会条件下，有利于TP过渡的主要男性在diarcic濑鱼，海猪鱼poecilopterus。IP主要男性总是开始TP特定的性行为中存在的一个较小的下属，随后获得TP体着色。相比之下，处于从属地位的初级雄性往往表现出类似雌性的性行为。在对相似的身体大小，这两个人发起TP男性行为。结果表明，TP过渡在初级男性可能密切相关的优势关系（或大小顺序）的社会群体内，因为它是在由女性的性别变化的情况下。
In many diandric fishes, large territorial males with bright body coloration (terminal phase (TP) males) are derived either from initial phase (IP) females that change sex to male or from IP primary males that change color and behavior, but do not change sex. The mechanism controlling the transition of IP primary males into TP males is not well understood. We conducted cohabitation experiments to examine social conditions favoring TP transition by primary males in the diandric wrasse, Halichoeres poecilopterus. IP primary males always started TP-specific sexual behavior in the presence of a smaller subordinate, and subsequently acquired TP body coloration. In contrast, primary males under subordinate conditions often performed female-like sexual behavior. In pairs with similar body sizes, both individuals initiated TP male behavior. The results suggest that TP transition in primary males may be closely related to a dominance relationship (or size order) within social groups, as it is in the case of sex change by females.