Walleye

Walleye
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Perciformes
Family:	Percidae
Subfamily:	Luciopercinae
Genus:	Sander
Species:	S. vitreus
Binomial name
Sander vitreus (Mitchill, 1818)
Synonyms[2]
Perca vitrea Mitchill, 1818 Stizostedion vitreum (Mitchill, 1818) Lucioperca americana Cuvier, 1828 Lucioperca grisea DeKay, 1842 Stizostedion glaucum Hubbs, 1926

The walleye (Sander vitreus, synonym Stizostedion vitreum), also called the walleyed pike,^[3] yellow pike, yellow pikeperch or yellow pickerel,^[4] is a freshwater perciform fish native to most of Canada and to the Northern United States. It is a North American close relative of the European zander, also known as the pikeperch. The walleye is sometimes called the yellow walleye to distinguish it from the blue walleye, which is a color morph that was once found in the southern Ontario and Quebec regions, but is now presumed extinct.^[5] However, recent genetic analysis of a preserved (frozen) 'blue walleye' sample suggests that the blue and yellow walleye were simply phenotypes within the same species and do not merit separate taxonomic classification.^[6]

In parts of its range in English-speaking Canada, the walleye is known as a Pickerel, though the fish is not related to the true pickerels, which are members of the family Esocidae.^[7]

Walleyes show a fair amount of variation across watersheds. In general, fish within a watershed are quite similar and are genetically distinct from those of nearby watersheds. The species has been artificially propagated for over a century and has been planted on top of existing populations or introduced into waters naturally devoid of the species, sometimes reducing the overall genetic distinctiveness of populations.