Country Species Summary

Acipenser fulvescens in Canada
Lake sturgeon

Acipenser fulvescens Rafinesque, 1817
Family:	Acipenseridae (Sturgeons) , subfamily: Acipenserinae	picture (Acful_u0.jpg) by The Native Fish Conservancy
Order:	Acipenseriformes (sturgeons and paddlefishes)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:	Lake sturgeon
Max. size:	274 cm TL (male/unsexed; Ref. 5723); max. published weight: 125.0 kg (Ref. 3672); max. reported age: 152 years
Environment:	demersal; potamodromous
Climate:	temperate; 60°N - 32°N
Global Importance:	fisheries: commercial; aquaculture: experimental; aquarium: public aquariums
Resilience:	Very low, minimum population doubling time more than 14 years (tm=16-26; tmax=97; K=0.04; Fec=50,000)
Distribution:	North America: St. Lawrence-Great Lakes, Hudson Bay, and Mississippi River basins. International trade restricted (CITES II, since 1.7.75; CMS Appendix II).
Diagnosis:	Single row of preanal shields. Soft area on the top of the head absent and black viscera. Large blotches present on anterior half of upper surface of snout and on back. Lower surface whitish (Ref. 37032).
Biology:	Inhabits bottom of lakes and large rivers (Ref. 10294), usually in 5-9 m depth, over mud, sand, and gravel. Occasionally enters brackish water. A specimen caught in 1952 was reputed to have been 152 years old (Ref. 6866). Search for food, with the aid of the sensory ability of the barbels, by constantly moving close to the substrate. Omnivorous, virtually anything edible that enters the mouth is sucked up and consumed. The food is worked or pulled in the mouth, often partly ejected and sucked in again (Ref. 1998). Spawning sites are rocky and boulder filled areas along the outside bend of rivers (Ref. 41542). Smoked and in 1951, Canada, 2,000 lbs. of caviar were made from the eggs (Ref. 37032). Threatened due to over harvesting, habitat loss and pollution (Ref. 58490)
Threatened:	, (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Page, L.M. and B.M. Burr. 1991. (Ref. 5723)
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Canada country information
Common names:	Esturgeon jaune, Lake sturgeon, Nameo, Namew, Nemeo, Némèw	Ref: Berkes, F. and M. Mackenzie, 1978
Status:	native	Ref:
Salinity:	freshwater, brackish
Importance:	of no interest	Ref: Coker, G.A., C.B. Portt and C.K. Minns, 2001
Regulations:	no regulations	Ref:
Uses:	gamefish: yes
Comments:	Ranges from Alberta to Quebec. A commercial fishery once existed, no longer occurring (Ref. 52559). Also Ref. 3881.
States/Provinces:	Alberta (native) Manitoba (native) Ontario (native) Quebec (native) Saskatchewan (native)
States/Provinces Complete?:	Yes
Country Information:	www.cia.gov/cia/publications/factbook/geos/ca.html
National Fisheries Authority:	www.ncr.dfo.ca/home_e.htm
Occurrences:	Occurrences Point map
Main Ref:	Coker, G.A., C.B. Portt and C.K. Minns, 2001
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Modified: Ortañez, Auda Kareen

Entered: Luna, Susan M.

CGNET - US

Page created by: Eli, 20.10.03, last modified by Eli, 26.06.07

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