鸟类性别分配研究是当前国际动物行为学研究的前沿领域和进化生物学热点问题。针对朱鹮野生种群出现的后代性比偏雌现象，项目组在多年合作的基础上，充分发挥各方的技术优势和资源优势，采用彩色数字环志和分子性别鉴定技术，配合野外栖息地质量调查、补充投食和环志监测等方法，对当前朱鹮野生种群的性比偏离现象进行深入系统的研究，探究其原因并制定相应的栖息地管理和野外投食对策，所得结果对朱鹮的保护工作具有重要的指导和促进作用。同时，利用朱鹮这个理想的物种，调查栖息地质量、食物状况、雌鸟年龄、产卵时间和出生地扩散等对朱鹮性别分配的影响，通过野外投食验证本地资源竞争假说，应用适合度和进化稳定对策理论，从初级性比、次级性比和成鸟性比3个水平上深入探讨朱鹮性比调控的适应性机制，在国际上的同类研究中也很少见，将使研究结果具有较强的说服力。对丰富鸟类性别分配理论，拓展我国鸟类生态学和保护生物学研究的新领域具有重要意义。

The sex ratio of the wild population of the endangered Crested Ibis was recently discovered in female-biased condition. Sex allocation theory is one of the most controversial topics in evolutionary ecology. Using the numbered-color banding method and the Crested Ibis molecular sex identification technique, the project is proposed to investigate the sex allocation status and the conservation strategy of the wild population of the Crested Ibis intensively. The breeding habitat quality, food abundant status, maternal condition, female age, egg-laying dates and natal dispersal will be detected, linking the adaptive offspring sex ratio adjustment of the Crested Ibis. The Local Resource Competition hypnosis will be tested by food supplement in the wild and fitness and ESS theories will be used to explain the results and to improve the bird sex allocation theory. This project will benefit to the current conservation management of Crested Ibis, and provide evidence to improve the theories in avian ecology, animal behavior and conservation biology.