Evaluating the effect of temporal and spatial change in a species with temperature dependent sex determination: from primary to operational sex ratio

繁殖对于所有物种的延续和成功都是必不可少的。了解促进生殖的行为和机制可提供有关人口如何应对环境变化的信息。这在依赖温度决定性别的物种中尤其重要，因为后代的性别是由环境条件决定的。在这个项目中，我将调查鹿头海龟(Caretta Aretta)在整个交配季节的性别比(OSR)是如何变化的，多配偶交配系统对整个佛得角群岛的多父亲子关系的影响，以及多配偶交配系统对佛得角群岛多父关系比率的影响。具体地说，我将1)描述在繁殖季节内和在不同繁殖季节之间使用无人机(UAV)的成体性别比和OSR的变化；2)使用微卫星分析确定多胎亲子关系的比率；3)描述一夫多妻制与使用大型孵化场的一夫多妻制之间的成本-效益平衡；4)确定初级和运营性别比之间的相关性。

Reproduction is essential for the continuation and success of all species. Understanding the behaviours and mechanisms which facilitate reproduction provides information on how populations may respond to environmental change. This is particularly important in species with temperature-dependent sex determination, as the sex of offspring is determined by environmental conditions. During this project, I will investigate how the operational sex ratio (OSR) of loggerhead sea turtles (Caretta caretta) changes throughout the mating season, impact of polyandrous mating systems on the rate of multiple paternity across the determining the impact of polyandrous mating systems on the rate of multiple paternity across the archipelago of Cape Verde. Specifically, I will i) describe changes in the adult sex ratio and OSR using unmanned aerial vehicles (UAVs) within and between breeding seasons, ii) determine the rate of multiple paternity in clutches using microsatellite analysis iii) describe the cost-benefit balance of polyandry vs monandry using a largescale hatchery, iv) determine the correlation between primary and operational sex ratio.