Microgadus tomcod

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Microgadus tomcod
Atlantic tomcod.jpg
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Gadiformes
Family: Gadidae
Genus: Microgadus
Species: M. tomcod
Binomial name
Microgadus tomcod
(Walbaum, 1792)

Microgadus tomcod, also commonly known as frostfish, Atlantic tomcod or winter cod, is a type of cod found in North American coastal waters from the Gulf of St. Lawrence, St. Lawrence River and northern Newfoundland, south to Virginia.

The fishing season of the tomcod varies by location—one known example is the Sainte-Anne River in Quebec, where its season is from late-December to mid-February. The town of Sainte-Anne-de-la-Pérade is notable for its fishing village built on the frozen waters of the Ste-Anne, playing host to the scores of fishermen visiting the town to fish for the species.

After General Electric dumped polychlorinated biphenyls (PCBs) in the Hudson River from 1947 through 1976, tomcod living in the river were found to have developed an increased resistance to the compound's toxic effects.[2] Scientists identified the genetic mutation that conferred the resistance, and found that the mutated form was present in 99 percent of the tomcods in the river, compared to fewer than 10 percent of the tomcods from other waters.[2]

This species can reach a length of 38.1 cm (15.0 in).[3]



  1. ^ NatureServe (2015). "Microgadus tomcod". IUCN Red List of Threatened Species. Version 4.1 (4.1). International Union for Conservation of Nature. Retrieved February 25, 2016. 
  2. ^ a b Welsh, Jennifer (February 17, 2011). "Fish Evolved to Survive GE Toxins in Hudson River". LiveScience. Retrieved 2011-02-19. 
  3. ^ Froese, Rainer and Pauly, Daniel, eds. (2016). "Microgadus tomcod" in FishBase. February 2016 version.

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