ScienceDaily Posted October 31, 2012 Share Posted October 31, 2012 An experiment in females uncovers male hormonal mechanism. Read the full article on ScienceDaily Link to comment Share on other sites More sharing options...
PhysOrg Posted October 31, 2012 Author Share Posted October 31, 2012 (Phys.org)—In male songbirds of the temperate zone, the concentration of sex hormones is rising in spring, which leads to an increase in song activity during the breeding season. In the tropics, there has been little evidence so far about such a clear relationship between hormonal action and behaviour, which is partly due to a lower degree of seasonal changes of the environment. Researchers of the Max Planck Institute for Ornithology in Seewiesen have now discovered that in duetting African white-browed sparrow weavers, the solo song of dominant males is linked to elevated levels of testosterone. What is more, the male-typical solo song could be activated via testosterone treatment in female birds. The study thus shows a complex relationship between song behaviour and hormone concentration also in a tropical bird species. Read the full article on PhysOrg Link to comment Share on other sites More sharing options...
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