Population Genetic Structure of Two Mayflies (Ephemerella subvaria, Eurylophella verisimilis) in the Delaware River Drainage Basin
| Autor: | Bernard W. Sweeney, David H. Funk, Robin L. Vannote |
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| Rok vydání: | 1986 |
| Předmět: | |
| Zdroj: | Journal of the North American Benthological Society. 5:253-262 |
| ISSN: | 1937-237X 0887-3593 |
| Popis: | The population genetic structure of two species of mayflies was studied using protein electrophoresis at eight locations in the headwater region of the Delaware River drainage basin. Study sites were located upstream and downstream from two large reservoirs. The working hypothesis was that little or no genetic differentiation occurs between conspecific populations within and among tributaries of the same drainage basin. A total of 24 and 28 loci were examined for Eurylophella verisimilis and Ephemerella subvaria respectively. Geographic differentiation was significant for three of nine polymorphic loci (average F ST =0.028) for Ep. subvaria when all populations were compared. Spatial variation in allele frequencies among populations of Ep. subvaria was substantially higher in the West Branch than in the East Branch of the Delaware River. The spatial cline of allele frequencies for certain loci of Ep. subvaria paralleled environmental gradients in the vicinity of the two reservoirs but no cause-ef... |
| Databáze: | OpenAIRE |
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