DNA-based population density estimation of black bear at northern Mexico: A preliminary study

  • R Ávalos-Ramírez
  • L José Mijangos-Araujo
  • JJ Zarate-Ramos
  • A Martinez-Muñoz
  • JA Salinas-Meléndez
  • L María De Chávez-Briones
  • M Victor Riojas-Valdés

Abstract

The analysis of deoxyribonucleic acid (DNA) microsatellites from hair samples obtained by the non-invasive method of traps was used to estimate the population density of black bears (Ursus americanus eremicus) in a mountain located at the county of Lampazos, Nuevo Leon, Mexico. The genotyping of bears was performed by multiplex polymerase chain reaction (PCR) using an average of two hairs for each animal. Samples were obtained with barbed wire placed at the traps, which contained food as bait. Multiplex PCR was performed with the GenomiPhiTM, G.E. kit and genotyping with an automated DNA sequencing machine (ABI 310 System). Allelic frequency, heterozygosis and exclusion probability of seven DNA microsatellites were calculated and analyzed with computer programs to determine the population density. Three of the microsatellites had a heterozygosis higher than 0.7 and the population density was calculated in at least 1 bear/km2.

Keywords: Black bear, Ursus americanus, population size, DNA microsatellite, Mexico

African Journal of Biotechnology Vol. 12(2), pp. 103-108

Author Biographies

R Ávalos-Ramírez
Universidad Autónoma de Nuevo León, U.A.N.L., Fac. de Medicina Veterinaria y Zootecnia, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, Mexico
L José Mijangos-Araujo
Universidad Autónoma de Nuevo León, U.A.N.L., Fac. de Medicina Veterinaria y Zootecnia, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, Mexico
JJ Zarate-Ramos
Universidad Autónoma de Nuevo León, U.A.N.L., Fac. de Medicina Veterinaria y Zootecnia, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, Mexico
A Martinez-Muñoz
Universidad Autónoma de Nuevo León, U.A.N.L., Fac. de C. Forestales, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, Mexico
JA Salinas-Meléndez
Universidad Autónoma de Nuevo León, U.A.N.L., Fac. de Medicina Veterinaria y Zootecnia, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, Mexico
L María De Chávez-Briones
Universidad Autónoma de Nuevo León, U.A.N.L., Fac. de Medicina, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, Mexico
M Victor Riojas-Valdés
Universidad Autónoma de Nuevo León, U.A.N.L., Fac. de Medicina Veterinaria y Zootecnia, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo León, Mexico
Published
2015-11-28
Section
Articles

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eISSN: 1684-5315