Entorno: milieu / zona climática / rango de profundidad / gama de distribución
Ecología
; agua dulce; salobre demersal; potamodromo (Ref. 116361); rango de profundidad 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.
Longitud en la primera madurez / Tamaño / Peso / Edad
Madurez: Lm 99.7, range 90 - 120 cm
Max length : 274 cm TL macho / no sexado; (Ref. 5723); common length : 97.5 cm TL macho / no sexado; (Ref. 12193); peso máximo publicado: 125.0 kg (Ref. 3672); edad máxima reportada: 152 años (Ref. 72475)
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).
Body shape (shape guide): elongated.
Adults inhabit 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). In the 1800s, it was extensively exploited for oil to fire boilers on steamboats, animal feed and fertilizer. Later is was high-valued as smoked, caviar and isinglass (Ref. 117245). In 1951, Canada, 2,000 lbs. of caviar were made from the eggs (Ref. 37032). It continous to be an important source of food for Indigenous people in North America (Ref. 117245). 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)
Situación en la Lista Roja de la UICN (Ref. 130435: Version 2025-2 (Global))
Amenaza para el ser humano
Harmless
Usos humanos
Pesquerías: comercial; Acuicultura: experimental; pesca deportiva: si; Acuario: Acuarios públicos
Herramientas
Informes especiales
Descargar XML
Fuentes de Internet
Estimaciones basadas en modelos
Índice de diversidad filogenética (Referencia 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00269 (0.00213 - 0.00340), b=3.19 (3.14 - 3.24), in cm total length, based on LWR estimates for this species (Ref. 93245). |
Nivel trófico (Referencia 69278) |
3.3 ±0.49 se; based on food items. |
Resiliencia (Referencia 120179) |
Muy bajo, población duplicada en un tiempo mínimo superior a 14 años (tm=16-26; tmax=152; K=0.04; Fec=50,000). |
Vulnerabilidad pesquera (Ref. 59153) |
Very high vulnerability (86 of 100). 🛈 |
Categoría de precios (Ref. 80766) |
Unknown.
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