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

今年，Kohda和Takeyarna是Tanganyika湖的合作组织。 Kohda研究了合作多态的丽鱼酸辣椒Chalinochramis brichardi的繁殖生态，尤其是在楔形巢中的产卵地点。他发现了进一步的例子，其中将卵离合器沉积在巢穴中可以到达大型alpha雄性的位置。这些类似于前几年观察到的沉积位点。这些结果可能表明女性在大型α雄性可以到达的位置有选择性地产卵，并可能引起一个假设，即通过选择这种鱼的女性通过选择产卵位点，它们可能会控制这种鱼类的亲子关系分布。在Mpulungu City的实验室实验中，Mpulungu City进行了Mpulungu City，对巢形，楔形的巢形巢和宽巢的选择。正如往年的野外观察结果所致，女性倾向于选择楔形巢，而女性可以控制亲子关系分布。根据对布里卡迪的现场观察，我们获得了……更多的鸡蛋离合器例子。在11个鸡蛋Olutches 10中，有一个大α雄性可以进入的巢穴中。我们假设女性可以通过选择诸如产卵位点之类的位点来控制亲子鉴定分布。已经提出了女性对合作育种脊椎动物中亲子关系分布的控制，该假设的检验将是女性对额外动物中亲子关系分布的控制的第一个例子。我们发现这条鱼有帮助者，可能有关。据报道，鸟类和丽鱼科，但在鸟类和丽鱼科繁殖的成员中都有与相关助手的合作育种。那; N.Savoryi的合作育种将是Haremio交配系统中的第一个例子。我们将使用样品检查成年人和助手之间的相关性。我们带来了CA。 40个N.Savoryi的人到大阪市大学实验室。使用这些活鱼，我们将对这种鱼的合作育种进行水族馆实验，更少