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Alaskan & Russian Pollock

Alaska pollock or walleye pollock (Theragra chalcogramma)
  • common name

    Alaska pollock; Walleye pollock

  • scientific name

    Theragra chalcogramm

  • habitat

    Palearctic, Nearctic

  • weight

    600 to 800g

  • length

    30 to 91cm

World's biggest source of palatable fish

Alaska pollock has distinct blotches over its entire body with an olive-green belly. Its head has lateral pores, big eyes and a protruding lower jaw. There are 2 anal fins, 3 fins on its back and pelvic fins.

Habitat

Biogeographic realm
Palearctic, Nearctic

Range States
United States of America, Japan and Mexico

Geographical Location
Northern America, West and South-Western Asia

Ecological Region
Pelagic zone, Benthic zone

Interesting facts

  • Alaska pollock have a limited thermal tolerance range. As the fish grows old, its thermal range decreases.
  • They spawn in large groups. The females lay hundreds of thousands of eggs over several days. The eggs hatch in 9 to 28 days with the number of offspring ranging from 100,000 to 1,000,000.
  • The highest recorded number of eggs laid by an Alaska Pollock female is 1 million.
  • Alaska Pollock have an average life expectancy of 17 years. The record for the longest living Alaska Pollock is 31 years.
  • Alaska Pollock is used by McDonald's for its Filet-O-Fish sandwich. It is also used by many other leading food chains in the fast food industry.

Food chain

Feeds on:

  • Zooplankton (food for Alaskan Pollock larvae)
  • Euphausiid krill
  • Tunicates
  • Copepods
  • Shrimp
  • Small pollock
     
Known predators:

  • Northern rockfish
  • Atka mackeral
  • Greenland turbot
  • Plain, great and bigmouth sculpin
  • Sablefish
  • Pacific cod
  • Pacific halibut
  • Yellow Irish lords
  • Stellar sea lions
  • Humans

The most important groundfish species in world fisheries

Alaska and Russian pollock (Theragra chalcogramma)  is a small relative of the cod.

This large-eyed fish is the most important groundfish species in world fisheries (groundfish are fish that live on, in, or near the bottom of the body of water they inhabit).

It also supports the second largest fishery in the world after the Peruvian anchovy.

Pollock is marketed under several trade names including
  • walleye pollock,
  • whiting,
  • Pacific tomcod,
  • Pacific pollock, and
  • Alaska pollock.
Pollock is usually sold to consumers as fillets or breaded and battered portions, and it is frequently used as the main fish ingredient to make surimi products such as imitation crab.

Products are consumed all over the world, most notably in the Asian Pacific
region, North America and Europe. Pollock fisheries make up an important proportion of total Russian and US seafood production in the Pacific region.

US Pollock
The main fishing pollock areas for the US pollock fishery are in the Bering Sea/Aleutian Islands and Gulf of Alaska, with the Bering Sea accounting for more than 90% of the volume of the US pollock fishery.

Fished exclusively by US vessels, the Total Allowable Catch (TAC) for the fishery in 2007 was worth about $US 1.5 billion.

The US, through its North Pacific Fisheries Management Council (NPFMC), is responsible for managing the fishery.

Russian Pollock
The main fishing areas for Russian pollock fisheries are in the western parts of the Bering Sea and in the Sea of Okhotsk.

Russian fisheries commonly refer to pollock under the trade name “Alaska
Pollock,” but the Russian fisheries only operate in Russian waters and should not be confused with the US Pollock fishery.

Fished mainly by Russian vessels, the fishery is managed by the Russian
Federation.

What you can do

Use your power as a consumer - ask for MSC certified pollock. Consumer demand for sustainable seafood can act as an extremely powerful incentive for better fisheries management

Threats

The main threat to this fish comes from overfishing by humans. A substantial and steady decrease in its population has been reported.

Alaska pollock is not evaluated by IUCN.

The Marine Stewardship Council (MSC) has certified some fisheries as being sustainable.

For more than 20 years, the US pollock fishery has been well-managed,
and the certification to the MSC standard supports that conclusion.

The Russian pollock fishery entered the MSC certification process in 2008.

For updates on the status of MSC certification, visit; http://www.msc.org

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