Gadus ogac

Life-forms

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Osteoglossocephalai
Supercohors: Clupeocephala
Cohors: Euteleosteomorpha
Subcohors: Neoteleostei
Infracohors: Eurypterygia
Sectio: Ctenosquamata
Subsectio: Acanthomorphata
Divisio/Superordo: Paracanthopterygii
Series: Zeiogadaria
Subseries: Gadariae
Ordo: Gadiformes

Familia: Gadidae
Subfamilia: Gadinae
Genus: Gadus
Species: Gadus ogac
Name

Gadus ogac Richardson, 1836

Synonyms

Gadus morhua maris-albi Derjugin, 1920
Gadus callarias marisalbi Derjugin, 1920
Gadus morhua marisalbi Derjugin, 1920
Gadus morhua ogac Richardson, 1836
Gadus ogat Krøyer, 1847
Gadus ovak Reinhardt, 1837

References

Richardson, J. 1836. The Fish. In: Fauna Boreali-Americana; or the zoology of the northern parts of British America: containing descriptions of the objects of natural history collected on the late northern land expeditions, under the command of Sir John Franklin, R.N. Fauna Boreali-Americana; or the zoology of the northern parts of British America: ... Part 3: i-xv + 1-327, Pls. 74-97.
Gadus ogac – Taxon details on Integrated Taxonomic Information System (ITIS).

Vernacular names
English: Greenland cod
polski: ogak, dorsz grenlandzki
Türkçe: Grönland morinası

The Greenland cod (Gadus ogac), commonly known also as ogac, is a species of ray-finned fish in the cod family, Gadidae. Genetic analysis has shown that it may be the same species as the Pacific cod (Gadus macrocephalus).[1] It is a bottom-dwelling fish and is found on the continental shelf in the Arctic Ocean and northwestern Atlantic Ocean, its range extending from Alaska to West Greenland, then southwards along the Canadian coast to the Gulf of St. Lawrence and Cape Breton Island. It is a commercially harvested food fish,[2][3] but landings have been greatly reduced in recent years.
Taxonomy

Molecular genetic analyses strongly suggest that Greenland cod is not different from Pacific cod, Gadus macrocephalus - Gadus ogac is then a junior synonym of G. macrocephalus.[1] ITIS and the Catalogue of Life list Gadus ogac as synonym of G. macrocephalus.[4]
Description

In colour the Greenland cod is generally sombre, ranging from tan to brown to silvery. Its appearance is similar to that of other cod species; generally heavy-bodied, elongate, usually with a stout caudal peduncle.[3] They can grow to a length of 77 cm.[2]

They are bottom fishes inhabiting inshore waters and continental shelves, up to depths of 200 m. Their range covers the Arctic Ocean and Northwest Atlantic Ocean from Alaska to West Greenland, then south along the Canadian coast to the Gulf of St. Lawrence and Cape Breton Island generally from 45 to 75 degrees north.[3]

Their wholesome flesh is whitish and flaky but firmer and tougher and less desirable than that of the Atlantic cod.[citation needed] The stock of Greenland cod has been strongly reduced in recent years.[3]
Fisheries
Global capture of Greenland cod in tonnes reported by the FAO, 1950–2010[3]
References

Carr, S. M.; Kivlichan, D. S.; Pepin, P.; Crutcher, D. C. (1999). "Molecular systematics of gadid fishes: Implications for the biogeographic origins of Pacific species". Canadian Journal of Zoology. 77: 19–26. doi:10.1139/z98-194.
Froese, Rainer; Pauly, Daniel (eds.) (2005). "Gadus ogac" in FishBase. October 2005 version.
Gadus ogac (Richardson, 1836) FAO, Species Fact Sheet. Retrieved April 2012.

Catalogue of Life: Gadus macrocephalus.

Further reading

Hamilton LC, Brown BC and Rasmussen RO (2003) "West Greenland’s Cod-to-Shrimp Transition: Local Dimensions of Climatic Change" Archived 2013-05-10 at the Wayback Machine Arctic, 56 (3): 271–282.
Roe P (2012) "Growth variability in Atlantic cod (Gadus morhua) near its northern range of distribution" Master thesis, Aarhus University.
Therkildsen NO, Hemmer‐Hansen J, Wisz MS, Pampoulie C, Meldrup D, Bonanomi S, Retze A, Olsen SM and Nielsen EE (2013) "Spatiotemporal SNP analysis reveals pronounced biocomplexity at the northern range margin of Atlantic cod Gadus morhua" Evolutionary Applications, 6 (4): 690–705.