Entorno: milieu / zona climática / rango de profundidad / gama de distribución
Ecología
marino; agua dulce; salobre demersal; anadromo (Ref. 138280); rango de profundidad 6 - 53 m (Ref. 93286), usually 6 - 34 m (Ref. 93286). Subtropical; 49°N - 28°N, 82°W - 65°W (Ref. 54259)
North America: St. John River in Canada to St. Johns River in Florida, USA.
Longitud en la primera madurez / Tamaño / Peso / Edad
Madurez: Lm 50.0, range 45 - 55 cm
Max length : 143 cm TL macho / no sexado; (Ref. 6866); common length : 50.0 cm TL macho / no sexado; (Ref. 12193); peso máximo publicado: 23.0 kg (Ref. 6866); edad máxima reportada: 67 años (Ref. 6866)
Espinas dorsales (total) : 0; Radios blandos dorsales (total) : 33 - 42; Espinas anales: 0; Radios blandos anales: 18 - 24. Snout short, bluntly V-shaped, not upturned at tip. Barbels short (Ref. 7251). Absence of fontanelle and post dorsal shields. Single row of pre anal shields, 6-11 (Ref. 4639). Dorsal shields 7-13, lateral shields 22-34 (Ref. 4639). Blackish viscera (Ref. 37032). Head and back dark, lower surface white (Ref. 37032). Anal fin origin beneath dorsal fin origin (Ref. 86798).
Body shape (shape guide): elongated; Cross section: angular.
Inhabit river mouths, lakes, estuaries, and bays; occasionally enters the open sea. Feeds mostly at night over soft substrates; juveniles feed primarily on benthic crustaceans and insects, adults prey on benthic crustaceans, insects and mollusks (Ref. 93252). Maximum known age is 67 years for females and 30 years for males. Flesh of good quality; eggs are suitable for caviar (Ref. 3192).
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: escaso valor comercial; pesca deportiva: si; Acuario: Acuarios públicos
Herramientas
Informes especiales
Descargar XML
Fuentes de Internet
Estimaciones basadas en modelos
Temperatura preferida (Referencia
123201): 7.5 - 25.5, mean 15.6 °C (based on 138 cells).
Índice de diversidad filogenética (Referencia
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00316 (0.00155 - 0.00645), b=3.19 (3.02 - 3.36), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
Nivel trófico (Referencia
69278): 3.3 ±0.39 se; based on food items.
Generation time: 23.4 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
Resiliencia (Referencia
120179): Muy bajo, población duplicada en un tiempo mínimo superior a 14 años (K=0.04; tm=14-17; tmax=67; Fec=48,000).
Vulnerabilidad pesquera (Ref.
59153): Very high vulnerability (77 of 100).
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