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. The current world record weight for the pikeminnow, 13½ pounds, is held by Christopher Borger and Michael Ray of Edmonton, Alberta. A mature female can lay 30,000 eggs annually. Pikeminnow are voracious predators, and in the Columbia and Snake Rivers, salmon smolts comprise a large part of their diets. Their populations have flourished with the
View Wikipedia Record: Ptychocheilus oregonensis


Female Maturity [1]  4 years 6 months
Diet [2]  Carnivore
Adult Length [1]  25 inches (63 cm)
Brood Dispersal [1]  In the open
Brood Egg Substrate [1]  Lithophils (rock-gravel)
Brood Guarder [1]  No
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
Salvelinus alpinus (Arctic charr)1
Sterna paradisaea (Arctic Tern)1
Tringa melanoleuca (Greater Yellowlegs)1


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


Parasitized by 
Apophallus donicus[5]
Bothriocephalus opsariichthydis <Unverified Name>[5]
Dactylogyrus vancleavei[5]
Diplostomum baeri[5]
Diplostomum spathaceum[5]
Eubothrium tulipai[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]
Proteocephalus ptychocheilus <Unverified Name>[5]
Raphidascaris acus <Unverified Name>[5]
Rhabdochona cascadilla[5]
Schyzocotyle acheilognathi[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
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