Behavioural aspects of protandrous sex change in the anemonefish, Amphiprion melanopus, and endocrine correlates
Behavioural aspects of protandrous sex change in the anemonefish, Amphiprion melanopus, and endocrine correlates
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小丑鱼、Amphiprion melanopus 的先雄性别变化的行为方面和内分泌相关性
DOI：
10.1006/anbe.1994.1275
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发表时间：
1994
期刊：
影响因子：
2.5
通讯作者：
J. Godwin
中科院分区：
文献类型：
--
作者：
J. Godwin
摘要Abstract.行为和内分泌的差异，男性和女性之间，并在protandrous性别变化的特点是在海葵，Amphiprion melanopus。女性是社会群体中最大的和行为上占主导地位的成员，经常表现出对较小的男性伴侣和其他较小的非生殖个体的攻击。在1989年和1991年，通过移除雌性动物的实验刺激了性别变化。在1989年雌性动物迁移前和迁移后10至45天以及1991年迁移后1至20天采集了行为样本。性别改变的个人表现出显着增加的侵略1天内，女性删除。虽然变性个体发起的攻击行为的频率在5天、10天和20天的样本中逐渐下降，但仍显着高于基线男性水平。1989年，在女性被移除后的20至45天内，也观察到攻击性下降。介绍了一个模型入侵者的性别变化的个人在不同阶段揭示了变化的模式，女性的领土防御特征。整体侵略增加和攻击的比例在该领土的边缘，那些在中心随着时间的推移后，女性删除。没有令人信服的证据表明测量的5种类固醇的血浆水平与（1）雄性/雌性行为差异或（2）行为变化与性别变化之间存在关系。
Abstract Abstract. Behavioural and endocrine differences between males and females, and during protandrous sex change were characterized in the anemonefish, Amphiprion melanopus. Females are the largest and behaviourally dominant members of social groups, displaying frequent aggression towards their smaller male mates and other smaller non-reproductive individuals. Sex change was stimulated experimentally through female removals in 1989 and 1991. Behavioural samples were taken prior to female removal and from 10 to 45 days after removal in 1989 and 1-20 days after removal in 1991. Sex-changing individuals showed striking increases in aggression within 1 day following female removal. While the frequency of aggressive acts initiated by sex-changing individuals decreased gradually over the 5-, 10- and 20-day samples, it remained significantly elevated over baseline male levels. A decrease in aggression was also observed from 20 to 45 days after female removal in 1989. Presentations of a model intruder to sex-changing individuals at various stages revealed changes to a pattern of territorial defence characteristic of females. Overall aggression increased and the ratio of attacks at the periphery of the territory to those at the centre increased with time after female removal. There was no convincing evidence of a relationship between plasma levels of the five steroids measured and (1) male/female behavioural differences or (2) behavioural changes with sex change.