Genetic variation in tilapia populations in man-made reservoirs in Sri Lanka |
| |
| Authors: | CD de Silva |
| |
| Institution: | (1) School of Aquatic Science and Natural Resources Management, Deakin University, Warrnambool, Victoria, Australia |
| |
| Abstract: | An electrophoretic analysis of six populations of Oreochromis mossambicus (Peters) and four populations of O. niloticus (L.) from several rivers and a fish hatchery in Sri Lanka was conducted to determine the degree of mixing within and between stocks. Genetic characterization of the O. mossambicus stocks showed that some degree of mixing with O. niloticus occurred in all but two of the populations examined, while in the case of the O. niloticus, all the populations had some degree of mixing of O. mossambicus alleles. Genetic identity calculated using Nei's coefficient gave values ranging from 0.9484 to 0.9895 for O. niloticus populations and 1.0 to 0.9940 for O. mossambicus populations, while interspecies comparisons ranged from 0.7531 to 0.9002. The implications of these results for fisheries management and aquaculture are discussed. |
| |
| Keywords: | Electrophoresis Genetic variation Introgression Tilapia (Oreochromis mossambicus and O niloticus) |
| 本文献已被 SpringerLink 等数据库收录！ |
|
