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Boa constrictor occidentalis, the only subspecies of the genus Boa present inArgentina, is endangered because of the strong hunting pressure due to theskin and pet-shop trade and the destruction and fragmentation of itshabitat. We estimated levels of protein polymorphism and determined thedegree of genetic differentiation between two populations of B. c.occidentalis in Córdoba province, Argentina. We obtained blood samples from93 specimens in two sampling sites 200 km apart. A total of 17 proteinsaffording information on 25 presumptive loci were studied by gelelectrophoresis techniques. Only four loci were polymorphic: 6-Pgdh-1,Cat-1, Ldh and Hp. The mean heterozygosity per locus was low (0.06 and0.07). Life history and ecological traits of this snake may explain the lowlevels of polymorphism found. No evidence of inbreeding was detected. Theaverage genetic differentiation between the two sampled areas was notsignificant ( = 0.004). These results would indicate a relatively recentfragmentation of an original gene pool. 				

Protein polymorphism in populations of Boa constrictor occidentalis (Boidae) from Córdoba province, Argentina