Classification / Names
Populärnamn | synonymer | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (strålfeniga fiskar)
(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
; sötvatten; brackvatten bottenlevande; flodvandrande (Ref. 51243); djupintervall 5 - 9 m (Ref. 117245). Temperate; 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 / Size / Vikt / Age
Maturity: Lm 97.0, range 90 - 120 cm
Max length : 274 cm TL hane/ej könsbestämd; (Ref. 5723); common length : 97.5 cm TL hane/ej könsbestämd; (Ref. 12193); publicerad maxvikt: 125.0 kg (Ref. 3672); rapporterad maxålder: 152 år (Ref. 72475)
Morfologi | Morfometri
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)
IUCN Red List Status (Ref. 123251)
Threat to humans
Fiskeri: kommersiell; Vattenbruk: experimentell; sportfisk: ja; Akvarium: Offentliga akvarier
MedarbetareBilderStamps, Coins Misc.LjudCiguateraHastighetSimsättGälytaOtolithsHjärnstorlekSyn
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00275 (0.00213 - 0.00356), b=3.18 (3.12 - 3.24), in cm total length, based on LWR estimates for this species (Ref. 93245
Trofisk nivå (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.
Resiliens (Ref. 120179
): Mycket låg, lägsta populationsfördubblingstid mer än 14 år (tm=16-26; tmax=97; K=0.04; Fec=50,000).
Vulnerability (Ref. 59153
): Very high vulnerability (89 of 100) .