Sexual Selection:  Empirical Evaluation of the Ideas
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{'SignBlockName': 'Tarri Joyner', 'PO_EMAI': 'tjoyner@nsf.gov', 'PO_PHON': '7032927742'}
Sexual selection is the cause behind the evolution of elaborate                 male ornaments in birds (e.g. the large comb and colorful                       feathers of a domestic chicken rooster).  However, exactly how                  sexual selection works to produce such structures is not                        understood.  Work to date indicates that the size of the comb and               the degree of development of other ornaments of jungle fowl                     roosters (ancestors of domestic chickens) determine their sexual                attractiveness to hens and their ability to dominate other                      roosters.  Work to date indicates that ornaments are sensitive                  indicators of a male's resistance of disease.  Thus the                         investigators have discovered l) a previously unknown                           relationship between health of males and ornamentation and 2)                   that sexual selection favors disease-resistant roosters.  This                  first finding has important implications for the poultry industry               since jungle fowl and domestic chickens are the same species.                   The disease resistance, by artificial selection on the basis of                 male ornaments, disease resistance, and sexual selection in the                 red jungle fowl.
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{'Code': '112700', 'Text': 'Evolutionary Processes'}
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