Extremely high genetic differentiation between two populations of the river goby, Glossogobius callidus (Smith, 1937)

Two populations, an estuarine and freshwater population, of Glossogobius callidus were studied using protein gel electrophoresis to compare the extent of genetic variation and differentiation within and between them. Thirty protein coding loci were resolved of which eleven loci were polymorphic. The...

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Bibliographic Details
Published in:Water S. A. 1999, Vol.25 (1), p.85-90
Main Authors: ENGELBRECHT, G. D, MULDER, P. F. S
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Freshwater
Fundamental and applied biological sciences. Psychology
Genetics of eukaryotes. Biological and molecular evolution
Glossogobius callidus
Population genetics, reproduction patterns
Vertebrata
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Summary:Two populations, an estuarine and freshwater population, of Glossogobius callidus were studied using protein gel electrophoresis to compare the extent of genetic variation and differentiation within and between them. Thirty protein coding loci were resolved of which eleven loci were polymorphic. The Nhlabane Estuary population displayed higher expected heterozygosity (H sub(E) = 0.066) than the freshwater population (H sub(E) = 0.025). Rogers' and Nei's genetic distance values as well as genetic heterogeneity estimates (F sub(ST) values) indicate a high degree of genetic differentiation between the two populations. The possible reasons for the low variability and the extensive differentiation are discussed.
ISSN:0378-4738