Northern pikeminnow
| Northern pikeminnow | |
|---|---|
| |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Cypriniformes |
| Family: | Cyprinidae |
| Genus: | Ptychocheilus |
| Species: | P. oregonensis
|
| Binomial name | |
| Ptychocheilus oregonensis J. Richardson, 1836
| |
The northern pikeminnow, or Columbia River dace (Ptychocheilus oregonensis) is a large member of the minnow family, Cyprinidae.[2][3] This predatory freshwater fish is native to northwestern North America, ranging from the Nass River basin to the Columbia River basin.[2] A good deal of concern has been expressed regarding the impact northern pikeminnow populations may have on salmon in Columbia and Snake river impoundments.[4]
Naming
Until 1999, when the American Fisheries Society officially changed the common name to pikeminnow, the four species of this genus Ptychocheilus were known as squawfish.[5]
Behavior and habitat
Northern pikeminnows can live at least 11 years, reaching up to 25 in (63 cm) in total length and 7.5 lb (3.4 kg) in weight.[2] Female northern pikeminnow reach sexual maturity at about six years, males in three to five. A mature female can lay 30,000 eggs annually. Pikeminnow are adept predators, and in the Columbia and Snake Rivers, salmon smolts comprise a large part of their diets. Their populations have flourished with the development of the Columbia River hydropower system.[6] The reservoirs have provided excellent habitat for pikeminnow and given them an advantage over depressed salmon and steelhead populations.[7]
The northern pikeminnow has been shown to consume terrestrial insects, benthic invertebrates, other fish, aquatic insects, and plant matter.[8]
Relationship with people
While historically northern pikeminnow have not been of interest commercially nor to sport anglers, Washington and Oregon state fisheries agencies and the Bonneville Power Administration have placed a bounty[9] on them to reduce predation on scarce salmon stocks. A commercial fishery has developed based on that bounty. The current International Game Fish Association all tackle world record for northern pikeminnow is 7 lb 14 oz (3.6 kg) from the Snake River near Almota, Washington.[10]
References
- ^ NatureServe (2013). "Ptychocheilus oregonensis". IUCN Red List of Threatened Species. 2013: e.T202359A18233204.
- ^ a b c Froese, Rainer; Pauly, Daniel (eds.). "Ptychocheilus oregonensis". FishBase. May 2019 version.
- ^ "Ptychocheilus oregonensis". Integrated Taxonomic Information System. Retrieved 26 July 2006.
- ^ Blecha, Peter. 2018. "Pikeminnow reward program remains strong". The Columbian. https://www.columbian.com/news/2018/jul/25/pikeminnow-reward-program-remains-strong/. Accessed 8/21/18
- ^ "Former squawfish hooks new name". Indian Country Today (Lakota Times). September 14, 1998. Archived from the original on November 2, 2012.
- ^ Mesa, M. 1994. Effects of multiple acute stressors on the predator avoidance ability and physiology of juvenile chinook salmon. Transactions of the American Fisheries Society 123:786–793.
- ^ Petersen, J. 1994. Importance of spatial pattern in estimating predation on juvenile salmonids in the Columbia River. Transactions of the American Fisheries Society 123:924–930.
- ^ Haggerty, M. 2009. Lake Ozette Sockeye Limiting Factors Analysis. p 2-33.
- ^ Pikeminnow Bounty Program
- ^ "Pikeminnow, Northern". igfa.org. International Game Fish Association. Retrieved 9 April 2019.