EAPSI: Investigating the Presence of a Female Bateman Gradient in the Japanese surfperch Ditrema Temminckii

EAPSI：调查日本冲浪鲈 Ditrema Temminckii 中是否存在雌性贝特曼梯度

• 批准号: 1714049
• 负责人: Michael Izumiyama
• 金额: $ 0.54万
• 依托单位: Izumiyama Michael S
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-06-01 至 2018-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1714049&HistoricalAwards=false
• 关键词: EAPSI; Investigating; Presence; Female; Bateman; EAPSI; Investigating; Presence; Female; Bateman

Sexual selection is a major force driving evolution. This project will examine how sexual selection and reproduction vary in the Japanese surfperch, Ditrema temminckii, and compare the variation in number of mates and offspring to other surfperches endemic to the eastern Pacific coast. This project will utilize genetic information to understand the number of mates and fathers in a unique fish that exhibits internal fertilization and gestation to the sub-adult state. The research will be conducted at Osaka City University and Niigata University in collaboration with Dr. Satoshi Awata. This collaboration will provide unique data and new insights into how sexual selection varies between different species which diverged roughly 7 million years ago and have maintained a unique reproductive strategy.This project will measure sexual selection in female Ditrema temminckii by utilizing microsatellites to assign parentage to broods of pregnant female D. temminckii. The correlation between the number of sires and number of offspring (Bateman Gradient) will be determined and compared to other species of surfperch in the family Embiotocidae. In addition, sperm storage has been observed in D.temminckii, which uniquely positions this project to address a common criticism of female Bateman gradient studies: namely, that the number of sires is an underestimate of the actual number of mates. By tracking the number of mates progressively during the reproductive season and comparing to the number of sires detected, this study will be the first of its kind with the power to validate (or reject) the use of sires as an estimate of the number of overall mates. Therefore, this project aims to provide insight into the evolution of female sexual selection within a family of fishes that exhibit a derived reproductive strategy; by doing so, we may also resolve the controversy surrounding the use of sires as a proxy for the number of mates and clear the way for future female Bateman gradient studies in surfperch.This award, under the East Asia and Pacific Summer Institutes program, supports summer research by a U.S. graduate student and is jointly funded by National Science Foundation and the Japan Society for the Promotion of Science.

性选择是推动进化的主要力量。该项目将研究日本冲浪者，ditrema temminckii的性选择和繁殖如何变化，并比较伴侣和后代的变化与东太平洋海岸特有的其他表面人物的变化。该项目将利用遗传信息来了解独特的鱼类中的伴侣和父亲的数量，这些鱼表现出内部受精和孕育于成年状态。该研究将在大阪市大学和尼加塔大学与Satoshi Awata博士合作。这项合作将为大约700万年前的不同物种之间的性选择方式提供独特的数据和新的见解，并保持了独特的生殖策略。该项目将通过利用Micrososatellites将父母分配给亲生的女性D. themminckii的亲戚来衡量女性Ditrema temminckii的性选择。将确定和比较胚胎科中其他物种的冲浪者，并将其与后代的数量（贝特曼梯度）之间的相关性（贝特曼梯度）之间的相关性。此外，在D.Temminckii中已经观察到精子储存，该项目独特地定位了该项目，以解决对女性Bateman梯度研究的普遍批评：即，父亲的数量是对实际伴侣数量的低估。通过在生殖季节逐渐跟踪伴侣的数量，并与检测到的父亲数量进行比较，这项研究将是同类产品中的第一个能力，可以验证（或拒绝）使用公主作为整体伴侣数量的估计。因此，该项目旨在深入了解女性性选择在表现出衍生的生殖策略的鱼类家庭中的进化；通过这样做，我们还可以解决围绕伴侣数量代理的主张的争议，并为在Surfperch中的未来女性Bateman梯度研究扫清了道路。该奖项，该奖项，在东亚和太平洋夏季研究所计划下，支持美国研究生的夏季研究，并由美国科学基金会和日本社会为促销科学宣传。