(Sturgeons and paddlefishes) > Acipenseridae
(Sturgeons) > Acipenserinae
Etymology: Acipenser: Latin, acipenser = sturgeon, 1853 (Ref. 45335); fulvescens: From the words Acipenser, meaning sturgeon and fulvescens, yellowish (Ref. 10294) More on author: Rafinesque.
Environment: milieu / climate zone / depth range / distribution range
; eau douce; saumâtre démersal; potamodrome (Ref. 51243); profondeur 5 - 9 m (Ref. 117245), usually - m (Ref. ). Temperate; 0°C - ; 60°N - 30°N, 100°W - 71°W
North America: St. Lawrence-Great Lakes, Hudson Bay, and Mississippi River basins. CMS Appendix II).
Length at first maturity / Taille / Poids / Âge
Maturity: Lm 97.0, range 90 - 120 cm
Max length : 274 cm TL mâle / non sexé; (Ref. 5723); common length : 97.5 cm TL mâle / non sexé; (Ref. 12193); poids max. publié: 125.0 kg (Ref. 3672); âge max. reporté: 152 années (Ref. 72475)
Morphologie | Morphométrie
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).
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).
Spawning sites are rocky and boulder filled areas along the outside bend of rivers (Ref. 41542).
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)
Statut dans la liste rouge de l'IUCN (Ref. 124695)
Menace pour l'homme
Utilisations par l'homme
Pêcheries: commercial; Aquaculture: expérimental; pêche sportive: oui; Aquarium: Aquariums publics
RéférencesAquacultureProfil d'aquacultureSouchesGénétiqueFréquences alléliquesHéritabilitéPathologiesTraitementNutrientsMass conversion
CollaborateursImagesStamps, Coins Misc.SonsCiguateraVitesseType de nageSurface branchialeOtolithesCerveauxVision
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Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00282 (0.00219 - 0.00363), b=3.18 (3.13 - 3.23), in cm total length, based on LWR estimates for this species (Ref. 93245
Niveau trophique (Ref. 69278
): 3.3 ±0.49 se; based on food items.
Generation time: 49.9 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies.
Résilience (Ref. 120179
): Très faible, temps minimum de doublement de population supérieur à 14 ans (tm=16-26; tmax=97; K=0.04; Fec=50,000).
Vulnérabilité (Ref. 59153
): Very high vulnerability (89 of 100) .