Social Systems and Sex Allocation among Fishes

社会系统和鱼类性别分配

基本信息

批准号：
11440229
负责人：
KUWAMURA Tetsuo
金额：
$ 6.08万
依托单位：
CHUKYO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11440229/
关键词：
Fish Social system Sex Reproductive behavior Sex change Behavioral ecology Evolutionary biology

项目摘要

Field and aquarium experiments were carried out in order to investigate relationships between social/mating systems and sex allocation among several fish species on coral reefs of Sesoko Island, Okinawa and rocky reefs of Izu Peninsula. The following relationships were found.1. In the monogamous and protandrous anemone fishes Amphiprion spp., experiments keeping 2 females have been conducted, but female-to-male sex change has not yet been confirmed. The experiments will be continued.2. In the haremic and protogynous wrase Labroides dimidiatus and angel fish Centropyge ferrugatus, when males that had lost their mates met together, the smaller male changed back to female as it became subordinate.3. in the haremic trigger fish Sufflamen chrysopterus, we found female-tomale sex change by male removal experiments. Smaller, nonterritorial males were also found, and it is unknown whether males change back to females.4. In the polygamous and protogynous wrasse Halichoeres melanurus, goby Plerosicya muscarum and damselfish Dascyllus aruanus, males did not change back to female probably because subordinate smaller males have also opportunities to get reproductive success.5. In the polygamous goby Bathygobius fuscus and damselfish Dascyllus trimaculatus, we found no sign of sex change in such male-territory-visiting mating systems.

进行了田间和水族馆实验，以调查几种鱼类在Sesoko Island，冲绳，冲绳岛和Izu Peninsula的Rocky Reefs的几种鱼类中的社会/交配系统与性别分配之间的关系。找到以下关系1。在一夫一妻制和泥泞的海葵鱼两亲权属属中，已经进行了2个女性的实验，但尚未确认女性到男性的性别改变。实验将进行2。在盐血和致密性的labroides dimidiatus和Angel Fish Centropyge Ferrugatus中，当失去伴侣的雄性相遇时，较小的雄性变成了女性。3。在肺触发鱼类的chrysopterus中，我们发现了通过男性去除实验的女性性别变化。还发现了较小的非企业男性，尚不清楚雄性是否改变为女性。4。在一夫多妻制和杂物中，Melanurus，Goby Plerosicya Muscarum和Damellish Dascyllus Aruanus中，男性并没有改变雌性，可能是因为下属较小的男性也有机会获得生殖成功。5。在一夫多妻制的Goby Bathygobius fuscus和Damellish dascyllus trimaculatus中，我们没有发现这种男性访问的交配系统中没有性别改变的迹象。