Reproductive Isolation in Sympatric Populations of Pallid and Shovelnose Sturgeon
| Autor: | Donald E. Campton, Gregory J. Tranah, Bernie May, Harold L. Kincaid, Charles C. Krueger |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Sympatry
Ecology Reproductive isolation Management Monitoring Policy and Law Aquatic Science Biology biology.organism_classification Sturgeon Sympatric speciation Evolutionary biology Genetic variation Scaphirhynchus Genetic variability Ecology Evolution Behavior and Systematics Scaphirhynchus albus |
| Zdroj: | North American Journal of Fisheries Management. 21:367-373 |
| ISSN: | 1548-8675 0275-5947 |
| DOI: | 10.1577/1548-8675(2001)021<0367:riispo>2.0.co;2 |
| Popis: | Pallid sturgeon Scaphirhynchus albus and shovelnose sturgeon S. platorynchus are recognized morphologically as separate species. A previous genetic study with allozymes was unable to distinguish between the two species or demonstrate their reproductive isolation in regions of sympatry. Our main objective was to measure the genetic variability within and among populations of pallid and shovelnose sturgeon at the northern and southern extremes of their sympatric ranges to determine if genetic variation within the two species exhibits patterns consistent with reproductive isolation. Additionally, we examined a sample of individuals identified morphologically as hybrids of the two species to determine their genetic relationship to fish identified morphologically as pallid and shovelnose sturgeon. Data from five nuclear DNA microsatellite loci indicated that pallid and shovelnose sturgeon were genetically distinct at three sympatric localities. Pallid sturgeon from two northern populations in the uppe... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text