An integrative approach to sex change: social, behavioural and neurochemical changes in Lythrypnus dalli (Pisces)
An integrative approach to sex change: social, behavioural and neurochemical changes in Lythrypnus dalli (Pisces)
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性别改变的综合方法：Lythrypnus dalli（双鱼座）的社会、行为和神经化学变化
DOI：
10.1007/pl00012232
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发表时间：
1999
期刊：
影响因子：
1.1
通讯作者：
M. Grober
中科院分区：
文献类型：
--
作者：
R. Reavis;M. Grober
摘要。本研究从三个方面考察了大理石斑鱼（Gobiidae）的原生性别变化：(1)社会对性别变化速度的影响；(2)行为变化的顺序；(3)神经内分泌的变化。社会群体要么由4个女性组成，要么由4个女性和一个随后被移除的男性组成。当变性人的体型大于其他雌性动物时，变性人在去除雄性动物的群体中发生得最为迅速。只有雌性的性别改变者和没有雄性的性别改变者的性别改变率相似。这些差异可以用影响支配地位的两个因素来解释：对社会群体的先验知识和更大的规模。在雄性被移除之前，性别改变者对其他雌性具有优势，而在雄性被移除后，较大的性别改变者将迁移率提高了三倍。在其他组中，性别改变者没有表现出这种迁移的增加。这种早期建立的优势解释了性别变化速度的总体差异。然而，在产卵之前，所有的性别转换者都增加了位移，并进行了典型的雄性表演。变性人的精氨酸抗缩素免疫反应性前脑细胞大小与野外采集的雄性相似，比野外采集的雌性大。以前筑巢的雄性也会在只有雄性的群体中改变性别，但速度很慢。这些数据与现有的研究相结合，形成了虾虎鱼性别变化的综合模型。
Abstract. This study examined three aspects of protogynous sex change in Lythrypnus dalli (Gobiidae): (1) social influences on the rate of sex change, (2) the sequence of behavioural changes, and (3) neuroendocrine changes. Social groups consisted of either four females, or four females with a male who was subsequently removed. Sex change occurred most rapidly in male- removed groups when the sex changer was larger than other females. Sex changers in female only groups and sex changers not larger than other females in male-removed groups changed sex at similar rates. These differences may be explained by two factors that affect dominance: prior knowledge of the social group and greater size. Sex changers were dominant to other females prior to male removal, and larger sex changers increased displacement rates three-fold immediately after male removal. Sex changers in the other groups did not show this increase in displacements. This early establishment of dominance accounts for the overall difference in the rate of sex change. Prior to spawning, however, all sex changers increased displacements and performed male-typical displays. Arginine vasotocin-immunoreactive forebrain cells of sex changers were similar in size to field-collected males, and larger than field-collected females. Previously nesting males also changed sex in male-only groups, but at slow rates. These data are combined with those of existing studies to generate an integrative model of sex change in this goby.
拉布拉鱼性别/角色变化的神经元相关性：LHRH 样免疫反应性。
DOI：
10.1159/000114396
发表时间：
1991
期刊：
Brain, behavior and evolution
影响因子：
--
作者：
Grober,MS;Bass,AH
通讯作者：
Bass,AH