Animalia > Chordata > Actinopterygii > Cypriniformes > Cyprinidae > Ptychocheilus > Ptychocheilus oregonensis

Ptychocheilus oregonensis (Seatrout; Northern squawfish; Northern pikeminnow; Gray weakfish; Gray sea trout; Columbia squawfish; Columbia River dace)

Synonyms: Cyprinus oregonensis; Leuciscus oregonensis; Ptychocheilus gracilis; Ptychocheilus oregonense; Ptychocheilus rapax
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Wikipedia Abstract

The northern pikeminnow, or Columbia River dace (Ptychocheilus oregonensis) is a large member of the minnow family, Cyprinidae. Until 1999, when the American Fisheries Society officially changed the common name to pikeminnow, the four species of this genus were known as squawfish. Female northern pikeminnow reach sexual maturity at about six years, males in three to five. They can live longer than 15 years, reaching over 24 inches and eight pounds.
View Wikipedia Record: Ptychocheilus oregonensis


Female Maturity [1]  4 years 6 months
Adult Length [1]  25 inches (63 cm)
Brood Dispersal [1]  In the open
Brood Egg Substrate [1]  Lithophils (rock-gravel)
Brood Guarder [1]  No
Diet [2]  Carnivore
Litter Size [1]  83,000
Maximum Longevity [1]  19 years

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Lake Roosevelt National Recreation Area V 103172 Washington, United States
Olympic Biosphere Reserve II 922805 Washington, United States

Prey / Diet

Acrocheilus alutaceus (Squaremouth)[3]
Cottus asper (Bullhead)[4]
Gasterosteus aculeatus (Alaskan stickleback)[3]
Micropterus dolomieu (Smallmouth bass)[4]
Mylocheilus caurinus (Redmouth sucker)[4]
Oncorhynchus kisutch (coho salmon or silver salmon)[4]
Oncorhynchus mykiss (redband trout)[4]
Oncorhynchus nerka (sockeye salmon or kokanee)[4]
Oncorhynchus tshawytscha (chinook salmon or king salmon)[4]
Pacifastacus leniusculus (signal crayfish)[4]
Ptychocheilus oregonensis (Seatrout)[4]
Richardsonius balteatus (Silver-sided minnow)[4]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Bucephala clangula (Common Goldeneye)1
Clangula hyemalis (Oldsquaw)1
Gavia stellata (Red-throated Loon)1
Larus canus (Mew Gull)1
Melanitta nigra (Black Scoter)1
Oncorhynchus clarkii (Cutthroat trout)1
Podiceps grisegena (Red-necked Grebe)1
Salmo salar (Atlantic salmon)1
Salmo trutta (Brown trout)1
Sterna paradisaea (Arctic Tern)1


Micropterus salmoides (Northern largemouth bass)[4]
Pandion haliaetus (Osprey)[4]
Ptychocheilus oregonensis (Seatrout)[4]
Sander vitreus (Walleye)[4]


Parasitized by 
Allocreadium lobatum[5]
Apophallus donicus[5]
Bothriocephalus acheilognathi[5]
Bothriocephalus opsariichthydis <Unverified Name>[5]
Dactylogyrus vancleavei <Unverified Name>[5]
Diplostomum baeri[5]
Diplostomum spathaceum[5]
Eubothrium tulipai <Unverified Name>[5]
Ichthyocotylurus platycephalus[5]
Ligula intestinalis[5]
Neoechinorhynchus cristatus[5]
Neoechinorhynchus rutili[5]
Neoechinorhynchus saginatus[5]
Neoechinorhynchus salmonis[5]
Paradilepis simoni <Unverified Name>[5]
Pomphorhynchus bulbocolli[5]
Posthodiplostomum minimum[5]
Proteocephalus ptychocheilus <Unverified Name>[5]
Raphidascaris acus <Unverified Name>[5]
Rhabdochona cascadilla[5]
Tylodelphys scheuringi <Unverified Name>[5]

Institutions (Zoos, etc.)

Institution Infraspecies / Breed 
Vancouver Aquarium Marine Science Ctr

Range Map

America, North - Inland waters; Canada; Colorado; Columbia; Fraser; Nearctic; North America: Pacific drainages from Nass River in British Columbia, Canada to Columbia River in Nevada, USA; Harney River basin in Oregon, USA; Peace River system (Arctic basin) in British Columbia and Alberta, Canada.; USA (contiguous states);



Attributes / relations provided by 1Frimpong, E.A., and P. L. Angermeier. 2009. FishTraits: a database of ecological and life-history traits of freshwater fishes of the United States. Fisheries 34:487-495. 2Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 01, 2010 at 3FOOD OF THE SQUAWFISH Ptychocheilus oregonensis (Richardson) OF THE LOWER COLUMBIA RIVER, RICHARD B. THOMPSON, FISHERY BULLETIN 158 (1959) 4Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics. 5Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
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Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access