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Biochemical evidence of hybrid gene introgression in some reservoir populations of tilapia in southern Sri Lanka
Author(s) -
SILVA C. D.,
RANASINGHE J.
Publication year - 1989
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1989.tb00352.x
Subject(s) - introgression , biology , hatchery , tilapia , oreochromis mossambicus , sri lanka , fishery , oreochromis , fish hatchery , zoology , fish farming , aquaculture , fish <actinopterygii> , gene , genetics , socioeconomics , tanzania , sociology
. Two species of tilapia, Oreochromis mossambicus (Peters) and O. niloticus (L.), from five reservoirs in southern Sri Lanka as well as fish from a fish hatchery and laboratory stock were studied by starch gel electrophoresis at 18 enzyme loci, to determine the degree of mixing of the two species. Two reservoirs showed little or no mixing between O. mossambicus and O. niloticus , while two other reservoirs as well as the hatchery stock showed a high degree of mixing of the two species. The laboratory stock of O. niloticus also showed introgression of O. mossambicus alleles. The similarities of the local stocks to the original African as well as other Asian stocks is discussed.