Evolutionary ecology of sex-ratio variation

性别比例变异的进化生态学

• 批准号: 138090-2010
• 负责人: Anholt, Bradley
• 金额: $ 2.91万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=475766
• 关键词: Evolutionary; ecology; sex; ratio; variation

Understanding why sex-ratio is usually equal and predicting when it should deviate from equality is one of the success stories of evolutionary biology. In diploid organisms there is very little variation for sex ratio so the supporting data is almost all observational. The small crustacean copepod Tigriopus californicus has heritable variation for sex ratio and extraordinary wide variation in sex ratio. This makes it ideal to test sex ratio theory experimentally. This animal lives in the splash zone above the high tide line in small pools that frequently dry out. Populations are maintained by frequent dispersal. They are easily maintained in the laboratory and experimental breeding programs are easy to implement.

理解为什么性别比例通常是相等的，并预测何时应该偏离平等是进化生物学的成功故事之一。 在二倍体生物中，性别比例的变化非常小，因此支持数据几乎都是观察数据。 小型甲壳桡足类加州虎足虫的性比具有可遗传变异性，且性比变异范围极广。 这使得通过实验来检验性别比例理论成为一种理想的方法。 这种动物生活在高潮线以上的飞溅区，在经常干涸的小水池里。 种群是通过频繁的扩散来维持的。 它们很容易在实验室中维护，实验性育种计划也很容易实施。