Fivizzani A J, Colwell M A, Oring L W
Gen Comp Endocrinol. 1986 Apr;62(1):137-44. doi: 10.1016/0016-6480(86)90102-4.
Blood samples collected from free-living Wilson's phalaropes during the reproductive season were analyzed for testosterone, dihydrotestosterone, estradiol-17 beta, and progesterone. Levels of testosterone were seven times greater in nonincubating males than in females. During incubation males underwent a reduction in testosterone and dihydrotestosterone to levels similar to those of females. Estradiol-17 beta values were higher in females than in incubating males and comparable to values reported for other avian species. Progesterone was significantly greater in females than in incubating or nonincubating males. Maximum levels of progesterone were detected in laying females. Progesterone levels increased in males during incubation while testosterone and dihydrotestosterone levels decreased. These results indicate that the greater intensity of competition for mates among females and exclusive male parental care characteristic of this species is not based upon a reversal of the typical avian levels of androgens and estrogens in males and females.
在繁殖季节从自由生活的斑胸滨鹬采集的血样被分析检测睾酮、双氢睾酮、雌二醇 - 17β和孕酮。非孵卵雄性的睾酮水平比雌性高七倍。在孵卵期间，雄性的睾酮和双氢睾酮水平降低到与雌性相似的水平。雌性的雌二醇 - 17β值高于孵卵雄性，且与其他鸟类物种报告的值相当。雌性的孕酮水平显著高于孵卵或非孵卵雄性。在产卵雌性中检测到孕酮的最高水平。孵卵期间雄性的孕酮水平升高，而睾酮和双氢睾酮水平降低。这些结果表明，该物种雌性之间对配偶的竞争强度更大以及雄性专属育雏的特征并非基于雄性和雌性中雄激素和雌激素的典型鸟类水平的逆转。
