Consequently, pronghorn showed a reduced amount of mtDNA variation within most populations relative to other mammalian species. We found 9 mitochondrial haplotypes in the NADH dehydrogenase (ND-2) gene region. We used restriction-fragment analysis to measure mitochondrial DNA (mtDNA) variation in 110 individuals representing most of the pronghorn range. This pattern was consistent with recognition of Mexican pronghorn (A.
Population from southwestern Texas and southern New Mexico clustered in several groups outside the Oregon-American pronghorn cluster. Clustering values obtained from Rogers' distance, using unweighted pair-group method analysis, indicated close affinities between Oregon (A.
Twenty of 33 presumptive genetic loci were polymorphic. We assessed allozyme variation in 330 pronghorn from 29 populations. To help preserve and manage pronghorn (Antilocapra americana), it is important to characterize genetic variation of pronghorn populations. Further studies to evaluate supplementation strategies during critical times, to promote forb development and the dynamics of interaction with other ruminant animal species in the same rangeland, are necessary. It is concluded that the pronghorn will continue to be endangered despite these translocation programmes. Competition with cattle for grazing would occur under drought conditions. Births averaged 0.17 +/- 0.075 and 4 and 3 deaths were recorded in 19, respectively. Of the total diet consumed by the pronghorns, forbs ranked highest (75 %) while grasses and shrubs were consumed in almost similar quantities (12.5 % of each). Fifty-nine vegetation species were identified in the pronghorn diet and the poisonous plants: Solanum rostratum and Solanum eleagnifolium were determined in the pronghorn diet all-year round, though percentages consumed varied with season (0.96 % in wet season versus 11.2 % in dry season). Greatest diversity was obtained in the natural grass community (0.77), followed by halophyte grass community (0.74) and rosetophyll shrubs (0.53).
One hundred and seventeen vegetation species belonging to 32 different species were identified. Vegetation characteristics, botanical composition of the pronghorn diet and birth and mortality rates were monitored. This study covering three years (1995-1998) was conducted to evaluate the factors determining the success of the reintroduction of pronghorn in the Mexican state of Coahuila. The pronghorn (Antilocapra americana mexicana), an endemic ruminant species of North America is classified as an endangered species.
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