SREL Reprint #1954

 

 

 

 

CAPITULO 5
VARIABILIDAD GENETICA EN LA POBLACION DE VENADO COLA BLANCA EN LA ISLA SAN LUCAS, COSTA RICA, Y LAS IMPLICACIONES PARA SU MANEJO


Christopher Vaughan, Krishna Fisher, Miguel A. Rodriguez,
Paul Johns y Michael Smith

ABSTRACT

Muscle, liver and blood were collected from seventeen white-tailed deer on Isla San Lucas (,SL), Costa Rica, in December, 1985 to determine the genetic characteristics of the population. Thirty-four loci were analyzed using electrophoretic techniques. Genetic information from white-tailed deer samples was compared between three sites: 1) ISL (n = 17), 2) Savannah River Plant, Georgia, USA (SRP) (n = 6.349), and 3) Suriname (SSA) (n = 1 0). From 18 loci assayed from deer across the three locations for multilocus heterozygosity (H), alleles per locus (A), and polymorphism (P). it was found that SRP white-tailed deer had H = 0, 1 0; A = 2,17; y P = 38,9%; the SSA white-tailed deer sample had H = 0,039; A = 1, 1 1; y P = 1 1, 1; and the white-tailed deer sample from ISL had H = 0,039; A = 1,1 1; y P = 1 1, 1. Genetic distances between the three white-tailed deer populations (ISL, SRP, SSA) was: ISL vs. SRP, D = 0,085; SRP vs. SSA, D = 0.164; y ISL vs. SSA, D = O,l 12. Two new alleles not previously reported in North American or SSA white-tailed deer were observed in ISL deer for two of the 34 loci angled, EST-2 (110) and TF (108). Thirty-two loci were assayed from ft ISL and SRP samples. White-tailed deer from ISL had H = 0,055; A = 1, 1 9; y P = 18,75%, while the white-tailed deer from SRP had H = O,l 17; A = 2,22; y P = 46,88%. Genetic distance between the two populations was D = 0, 1 69. These results show that the low genetic variability of the ISL deer population is more similar to SSA then to SRP. Possible explanations for this low genetic variability include: insularity, small island size, founder and bottleneck effects resulting in small effective population size. The same factors may explain low H and P values for ISL deer. Deer selected for reintroductions should have the highest genetic variability possible. However, to date apparently the use of fawn and adult white-tailed deer from ISL for reintroductions has been successful and we recommend to continue this work until new information shows the contrary.

 

SREL Reprint #1954

Vaughan, C., K. Fisher, M.A. Rodriguez, P. Johns, and M. Smith. 1995. Variabilidad genetica en la poblacion de venado cola blanca en la isla San Lucas, Costa Rica, y las implicaciones para su manejo. Ecologia y manejo del venado cola blanca en Mexico y Costa Rica 91-102.

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