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Mitochondrial DNA variability among Lake Baikal omul Coregonus autumnalis migratorius (Georgi)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Burnham-Curtis, Mary K. Ramme, Tina M. Todd, Thomas N. Bronte, Charles R. Fleischer, Guy W. Pronin, Nikolai M. Maistrenko, S. G. |
| Copyright Year | 2002 |
| Abstract | Omul, Coregonus autumnalis, are a commercially important coregonine fish from Lake Baikal, Siberia, Russia. In Lake Baikal, three morphotypes recognized by fishery experts occupy different zones in the lake; they are referred to as "littoral," "pelagic," and "benthic". Expressed character divergence was supported by whole-body morphometric analysis, but it is not known whether discrete genetic differ- ences accompany the observed morphological variation. This study was designed to assess the genetic variation of three different omul morphotypes sampled from different locations in Lake Baikal that were segregated by morphotype in multivariate analysis. We surveyed genetic variation with restriction frag- ment length polymorphism analysis of specific gene loci amplified with the polymerase chain reaction. Sequence variation was localized in the mitochondrial control region. Though no discrete genetic mark- ers were found, there'is evidence of reproductive segregation by geographic location that corroborates geographic variation in morphological characters. The omul, Coregonus autumnalis migratorius (Georgi), is the most important fish in the Lake Baikal region, comprising a major portion of both commercial and subsistence fisheries for centuries. After decades of intense harvest, environmental modification, and technological improvements in harvest methods, omul population abundance began to decline sharply (SMIR- NOV 1992). Virtually all populations were considered endangered by the mid-1900s and the fishery was closed from 1969-1975. Today, omul account for approximately 50% of the annu- al harvested biomass in the lake; commercial and subsistence fisheries are supported by wild |
| Starting Page | 85 |
| Ending Page | 95 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| Volume Number | 57 |
| Alternate Webpage(s) | https://www.fws.gov/lab/pdfs/Burnham-Curtis_etal.2002.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |