Decrease in horn size and increase in age of trophy sheep in Alberta over 37 years

@article{FestaBianchet2014DecreaseIH,
  title={Decrease in horn size and increase in age of trophy sheep in Alberta over 37 years},
  author={M. Festa-Bianchet and F. Pelletier and J. Jorgenson and C. Feder and A. Hubbs},
  journal={Journal of Wildlife Management},
  year={2014},
  volume={78},
  pages={133-141}
}
Long-term data (1974-2011) from harvested bighorn rams (Ovis canadensis) in Alberta, Canada, suggested a reduction in horn size and in the proportion of trophy rams in the provincial population over time. Age at harvest increased over time, suggesting slower horn growth. Rams that experienced favorable environmental conditions early in life had rapid horn growth and were harvested at a younger age than rams with slower horn growth. Guided nonresident hunters did not harvest larger rams than… Expand
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