Mixed stock analysis and the power of different classes of molecular markers in discriminating coastal and oceanic Atlantic cod (Gadus morhua L.) on the Lofoten spawning grounds, Northern Norway
Wennevik, V.; Jørstad, K.E.; Dahle, G.; Fevolden, S.-E. (2008). Mixed stock analysis and the power of different classes of molecular markers in discriminating coastal and oceanic Atlantic cod (Gadus morhua L.) on the Lofoten spawning grounds, Northern Norway. Hydrobiologia 606(1): 7-25. https://dx.doi.org/10.1007/s10750-008-9349-5 In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, more Related to:Wennevik, V.; Jørstad, K.E.; Dahle, G.; Fevolden, S.-E. (2008). Mixed stock analysis and the power of different classes of molecular markers in discriminating coastal and oceanic Atlantic cod ( Gadus morhua L.) on the Lofoten spawning grounds, Northern Norway, in: Davenport, J. et al. Challenges to Marine Ecosystems: Proceedings of the 41st European Marine Biology Symposium, held in Cork, Ireland, 4-8 September 2005. Developments in Hydrobiology, 202: pp. 7-25. https://dx.doi.org/10.1007/978-1-4020-8808-7_1, more |  |
| Keywords | Acids > Organic compounds > Organic acids > Nucleic acids > DNA
Analysis > Genetic analysis
Biomarkers
Classification
Coastal zone
Fauna > Aquatic organisms > Aquatic animals > Fish
Fisheries
Genetic engineering
Marine biology
Otoliths
Population dynamics
Spawning grounds
Stock assessment
Stocks
Gadus morhua Linnaeus, 1758 [WoRMS]
ANE, Norway, Lofoten I. [Marine Regions]; ANE, Norway, Vestfjorden [Marine Regions]
Marine/Coastal | | Author keywords | Atlantic cod; mixed stock analysis; Pan I |
| Authors | | Top | - Wennevik, V.
- Jørstad, K.E.
- Dahle, G.
- Fevolden, S.-E.
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| Abstract | Atlantic cod (Gadus morhua) encompasses many different populations or stocks, which in part are managed separately. In the northeast Atlantic cod is divided into two main management units; northeast Arctic cod and coastal cod. These two groups have traditionally been separated by otolith classification. In this study, the power of different classes of genetic markers in separating the two cod groups was investigated. The variation in thirteen genetic markers, including allozymes, haemoglobin, the scDNA locus Pantophysin (Pan I) and a number of microsatellites was investigated, and mixed stock analysis and individual assignment tests were performed on samples comprising a mixture of individuals of putative coastal and oceanic type cod. The genetic analyses showed a large genetic differentiation between outer stations and stations located closer to the mainland shore. Mixed stock analysis and individual assignment tests used for estimation of stock proportions gave results similar to those obtained by otolith classification. |
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