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Study of reproductive ecology and sociality of Lake Tanganyika cichlids : a model system of social evolution of vertebrates

坦噶尼喀湖慈鲷的生殖生态学和社会性研究：脊椎动物社会进化的模型系统

基本信息

批准号：
14405008
负责人：
KOHDA Masanori
金额：
$ 8.19万
依托单位：
Osaka City University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

In this year, Kohda and Takeyarna as a cooperator studied in Lake Tanganyika. Kohda researched breeding ecology of cooperatively polyandrous cichlid Chalinochramis brichardi, especially on the spawning sites in wedge-shaped nests. He found further examples where egg clutches were deposited at the point in the nest to which large alpha males can reach. These were similar to depositing sites observed in previous years. These results may indicate female selectively spawn eggs at the site to which large alpha males can reach, and may lead the hypothesis that through selection of spawning sites by females of this fish, they may control paternity distribution in this fish.In laboratory experiments at the Mpulungu City, female choice of nest shape, wedge-shaped nests and wide nests was examined. AS predidted from field observation in previous years, female tended to choose wedge-shaped nests in which female can control paternity distribution. From field observation of C.brichardi, we obtained … More further examples of egg clutches. Of 11 egg olutches 10 were deposited at the site in nest to which a large alpha male can enter. We made a hypothesis that females can control paternity distribution by selecting such sita as spawning site. Female control of paternity distribution in cooperative breeding vertebrates has been suggested, The test of this hypothesis will be the first example of female control of paternity distribution in extra-fertilizing animals.N.savoryi is known as a haremic cichlid. We found that this fish has helpers, probably related. Cooperative breeding with related helpers has been reported in birds as well as cichlids, but both in birds and cichlids breeding members are of pairs. Thus ; the cooperative breeding of N.savoryi will the first example in haremio mating system. We will examine the relatedness between adults and helpers using samples. We brought ca. 40 individuals of N.savoryi to the laboratory of Osaka City University. Using these live fish, we will conduct aquarium experiment on the cooperative breeding of this fish, Less

这一年，Kohda和Takeyarna作为合作者在坦噶尼喀湖学习。Kohda研究了合作型多雄唇鱼Chalinochramis brichardi的繁殖生态，特别是楔形巢中的产卵场。他还发现了更多的例子，即蛋窝被放置在巢穴中大型阿尔法雄性可以到达的地方。这些地点与前几年观察到的沉积地点相似。这些结果可能表明，女性选择性产卵的网站，大阿尔法男性可以达到的鸡蛋，并可能导致的假设，通过选择产卵地点的女性这条鱼，他们可能会控制父系分布在这fish.In实验室实验室在Mpulungu市，女性选择的巢形，楔形巢和宽巢进行了检查。与往年野外观察结果一致，雌鸟倾向于选择楔形巢，在楔形巢中雌鸟可以控制父性分布。通过野外观察， ...更多信息更多关于鸡蛋的例子在11只卵中，有10只被放置在一个大的阿尔法雄性可以进入的巢中的位置。我们提出了一个假设，即雌性可以通过选择这样的产卵地点来控制父权分配。在合作繁殖的脊椎动物中，雌性控制了父系的分布，这一假说的检验将是雌性控制非亲鱼父系分布的第一个例子。我们发现这条鱼有帮手，可能是相关的。在鸟类和慈鲷科中也有与相关辅助者合作繁殖的报道，但鸟类和慈鲷科的繁殖成员都是成对的。因此，沙蚕的合作育种将是夏蚕交配系统的第一个实例。我们将使用样本来检验成年人和帮助者之间的关系。我们带来了卡。将40个沙佛氏猪笼草个体送至大坂市立大学实验室。利用这些活鱼，我们将对这种鱼的合作繁殖进行水族馆实验，