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Few dietary studies of pronghorn (Antilocapra americana) have been conducted in semidesert grasslands and little mention has been made of Mexican-tea or ephedra (Ephedra spp.) as a browse species. During summer 2003, we estimated the mortality rate of a pronghorn population in southwestern New Mexico to be nearly 75%. As the severity of the summer drought progressed, pronghorn used ephedra (Ephedra torreyana) until many plants showed signs of heavy browsing. Perennial browse is limited in this area, and we suspect this normally winter forage species was used as an emergency food. If pronghorn carrying capacity in semidesert areas is limited by insufficient forage during dry years, browse occurrence and condition...
Categories: Publication;
Types: Citation,
Conference Citation;
Tags: Antilocapra americana,
Ephedra torreyana,
Managing Wildlife in the Southwest,
Mexican tea,
Southwest Section of The Wildlife Society, All tags...
browse,
cacti,
diet,
drought,
pronghorn,
semidesert grassland, Fewer tags
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