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Intraspecific phylogeography of the Cape galaxias from South Africa: evidence from mitochondrial DNA sequences
Citation
Waters, JM and Cambray, JA, Intraspecific phylogeography of the Cape galaxias from South Africa: evidence from mitochondrial DNA sequences, Journal of Fish Biology, 50, (6) pp. 1329-1338. ISSN 0022-1112 (1997) [Refereed Article]
DOI: doi:10.1111/j.1095-8649.1997.tb01656.x
Abstract
Mitochondrial cytochrome b gene sequences were obtained from representatives of five populations of the Cape galaxias Galaxias zebratus. Four highly distinct genotypes were revealed, with sequence divergence values ranging from 5.8 to 13.8%. Some of the pairwise divergences are the highest yet reported for cytochrome b within a fish species, and are more typical of interspecific and intergeneric comparisons. In contrast, the low genetic divergence (0.3%) between two recently recorded populations from the Krom and Gamtoos (Kouga) Rivers indicates recent gene flow. Parsimony analysis consistently produced a tree with the population from the Olifants River on the west coast as ancestral and eastern populations as progressively more derived. Estimated divergence times for the Olifants population range from 4.4 to 6.6 million years ago. The findings suggest that another detailed revision is required to determine whether these divergent populations represent a single species or a species complex.
Item Details
Item Type: | Refereed Article |
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Research Division: | Biological Sciences |
Research Group: | Zoology |
Research Field: | Zoology not elsewhere classified |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding Knowledge |
Objective Field: | Expanding Knowledge in the Environmental Sciences |
Author: | Waters, JM (Associate Professor Jon Waters) |
ID Code: | 11116 |
Year Published: | 1997 |
Web of Science® Times Cited: | 33 |
Deposited By: | Zoology |
Deposited On: | 1997-08-01 |
Last Modified: | 2011-08-11 |
Downloads: | 0 |
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