Three interesting conclusions made from the studies I posted earlier.
First link- Trophy hunting has not reduced horn size in rams
Third link- Horn size mostly determined by environmental factors vs. genetics
Fourth link- Even in the prescence of mature rams (8+ years old), 50% of lambs were sired by sub-dominant rams (under 8 years old)
More reading...
http://www.skinnymoose.com/naturecont.pdf
and a suggestion... cut and paste reference material into google, may lead to the actual papers.