Acipenser fulvescens  Rafinesque, 1817

Lake sturgeon
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Acipenser fulvescens
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Acipenseriformes (Sturgeons and paddlefishes) > Acipenseridae (Sturgeons) > Acipenserinae
Etymology: Acipenser: Latin, acipenser = sturgeon, 1853 (Ref. 45335).

Environment / Climate / Range Ecology

Freshwater; brackish; demersal; potamodromous (Ref. 51243).   Temperate; 60°N - 32°N

Length at first maturity / Size / Weight / Age

Maturity: Lm 97.0, range 90 - 120 cm
Max length : 274 cm TL male/unsexed; (Ref. 5723); common length : 97.5 cm TL male/unsexed; (Ref. 12193); max. published weight: 125.0 kg (Ref. 3672); max. reported age: 152 years (Ref. 72475)

Short description Morphology | Morphometrics

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). Anal fin origin behind dorsal fin origin; scutes on back and along side same color as skin (Ref. 86798).

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

North America: St. Lawrence-Great Lakes, Hudson Bay, and Mississippi River basins. International trade restricted (CITES II, since 1.7.75; CMS Appendix II).

Biology     Glossary (e.g. epibenthic)

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).

Main reference Upload your references | References | Coordinator | Collaborators

Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)

IUCN Red List Status (Ref. 90363)

CITES (Ref. 94142)

Threat to humans

  Harmless




Human uses

Fisheries: commercial; aquaculture: experimental; gamefish: yes; aquarium: public aquariums
FAO(fisheries: species profile; publication : search) | FisheriesWiki | Sea Around Us

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00219 (0.00181 - 0.00264), b=3.20 (3.15 - 3.25), based on LWR estimates for this species (Ref. 93245).
Trophic Level (Ref. 69278):  3.3   ±0.49 se; Based on food items.
Resilience (Ref. 69278):  Very Low, minimum population doubling time more than 14 years (tm=16-26; tmax=97; K=0.04; Fec=50,000).
Vulnerability (Ref. 59153):  Very high vulnerability (89 of 100) .
Price category (Ref. 80766):   Unknown.