Kamchatka flounder

The Kamchatka flounder, Atheresthes evermanni, is a flatfish of the family Pleuronectidae. It is a demersal fish that lives at depths of between 20 metres (66 ft) and 1,200 metres (3,900 ft). Its native habitat is the temperate waters of the northern Pacific. It can grow as long as 100 centimetres (39 in) in length, and can weigh up to 8.5 kilograms (19 lb).[1]

Kamchatka flounder
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Pleuronectiformes
Family: Pleuronectidae
Genus: Atheresthes
Species:
A. evermanni
Binomial name
Atheresthes evermanni
Synonyms
  • Reinhardtius evermanni (Jordan & Starks, 1904)
  • Reinhardtius oleosus Tanaka, 1918

Range

The native habitat of the Kamchatka flounder ranges from the Shelikof Strait and the Aleutian Islands in Alaska, across the Bering Sea, to the Gulf of Anadyr, Kamchatka Peninsula and the seas of Okhotsk and Japan.[1][2]

In the east of its range the Kamchatka flounder overlaps with the range of the arrowtooth flounder, and similarities in appearance between the two species mean that they were not distinguished in commercial fishing until 2007.[2]

Diet

The Kamchatka flounder's diet consists of fish and zoobenthos organisms such as squid, cuttlefish, shrimps, prawns, amphipods, mysids, mollusks and marine worms,[1] though the most important prey item is the walleye pollock, which accounted for 56-86% of stomach contents by weight in one study.[3]

Predators

Kamchatka flounder have been found in the stomachs of only 17 different species of fish in the Bering Sea and Aleutian Islands, including Pacific cod, Pacific halibut, pollock, arrowtooth flounder and sculpin.[2]

Commercial fishing

A market has developed for Kamchatka flounder and as such it is targeted by the commercial fishing industry. Catches have risen from 1,183 tons in 2007 to 19,662 tons in 2010 (prior to 2007 Kamchatcka flounder was not differentiated from the arrowtooth flounder catch; it is estimated that around 10% of the arrowtooth flounder catch was Kamchatka flounder). Total biomass was estimated at 128,800 tons in 2010.[2]

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References
  1. Froese, Rainer and Pauly, Daniel, eds. (2006). "Atheresthes evermanni" in FishBase. April 2006 version.
  2. Wilderbuer, Thomas K.; Nichol, Daniel G.; Lauth, Robert (December 2010). "Kamchatka Flounder" (PDF). NPFMC Bering Sea and Aleutian Islands SAFE. Alaska Fisheries Science Center. Retrieved 2011-08-03.
  3. Yang, M. S.; Livingston, P.A. (1986). "Food habits and diet overlap of two congeneric species, Atheresthes stomias and Atheresthes evermanni, in the eastern Bering sea". Fish. Bull. 82 (3): 615–623.
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