Social Systems and Sex Allocation among Fishes

社会系统和鱼类性别分配

• 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

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.

通过野外和水族箱实验，研究了冲绳珊瑚礁和伊豆半岛岩礁上几种鱼类的社会/交配系统与性别分配的关系。发现以下关系。1.在一夫一妻制和雄性先熟的海葵鱼类双锯鱼属中，已经进行了保持2只雌性的实验，但雌性到雄性的性别变化尚未得到证实。实验将继续进行。在雌雄同体和先雌后雌的濑鱼中，当失去配偶的雄性相遇时，较小的雄性变回雌性，成为从属。在黄鳍笛鲷（Sufflamen chrysopterus）中，通过雄性去除实验发现了雌性-雄性的性别变化。也发现了较小的，无领土的男性，不知道男性是否会变回女性。在一夫多妻和先雌先孕的濑鱼中，雄性没有变回雌性，可能是因为从属的较小雄性也有机会获得生殖成功.在一夫多妻的虾虎鱼Bathygobius fuscus和雀鲷Dascyllus trimaculatus中，我们没有发现这种雄性领地访问交配系统的性别变化迹象。

项目成果

Nakashima,Y.: "Famale-female spawning and sex change in a haremic coral-reef fish ladroidesdimidiatus"Zoological Science. 17(7). 967-970 (2000)

Nakashima，Y.：“雌性珊瑚礁鱼 ladroidesdimidiatus 中的雌性产卵和性别变化”动物学。

桑村 哲生: "生命の意味"裳華房. 173 (2002)

桑村哲夫：《生命的意义》Shokabo 173 (2002)。

Sakai, Y., Kohda, M. & Kuwamura, T.: "Effect of changing harem on timing of sex change in female cleaner fish Labroides dimidiatus"Animal Behavior. 62. 251-257 (2001)

Sakai，Y.，Kohda，M.

Kuwamura, T.: "Status-dependent sex change related with mate choice in reef fishes"Advances in Ethology. 36. 8 (2001)

Kuwamura, T.：“与珊瑚礁鱼类配偶选择相关的状态依赖性性别变化”动物行为学进展。

KUWAMURA, T: "Status-dependent sex change related with mate choice in reef fishes"Advances in Ethology(Supplements to Ethology). 36. 8 (2001)

KUWAMURA, T：“与珊瑚礁鱼类配偶选择相关的状态依赖性性别变化”行为学进展（行为学补充）。