‘The length of the phallus of a species is frequency frequency of forced copulations. ‘ Said, ‘In response to male their paternity their paternity on women, female waterfowl their own behaviors able to their own behaviors and anatomical means of control, the fathers say their children, ‘Brennan.. Why all the dynamic evolution? Brennan hypothesizes that the female waterfowl have anatomical features anatomical features such as physical evade evade male attempts to assert control over reproduction. ‘Despite the fact that most waterfowl form monogamous pairs, forced matings with other males – the avian equivalent of rape – are common in many waterfowl,’said Prum.
Brennan tracks these results with further exploration of the development and evolution of genitalia in birds. ‘I’m sure there are more surprises,’she said. Its further research will ask why different lines of ducks and other birds in breeding biology and genital complexity vary.The National Institutes of Health – The Country Medical Research Agency – has 27 institute and center and a component of the U.S. Department of Health and Human Services. It is the primary Protection Agency to implement and funding of basic research, clinical and translational medical science, and it investigates the causes, treatments, and cure for both common and rare diseases. For more information about NIH and its programs, visit.