Environment: milieu / climate zone / depth range / distribution range
Ecología
marino; agua dulce; salobre demersal; anadromo (Ref. 51243); 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.
Length at first maturity / Tamaño / Peso / Age
Maturity: 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).
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)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Pesquerías: escaso valor comercial; pesca deportiva: si; Acuario: Acuarios públicos
Más información
ReferenciasAcuiculturaPerfil de acuiculturaRazasGenéticaElectrophoresesheritabilidadEnfermedadesProcesamientoNutrientsMass conversion
ColaboradoresImágenesStamps, Coins Misc.SonidosCiguateraVelocidadTipo de nataciónSuperficie branquialOtolitosCerebrosVisión
Herramientas
Special reports
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Fuentes de Internet
Estimates based on models
Preferred temperature (Ref.
123201): 7.5 - 25.5, mean 15.6 °C (based on 138 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00324 (0.00142 - 0.00736), b=3.17 (2.99 - 3.35), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Nivel trófico (Ref.
69278): 3.3 ±0.39 se; based on food items.
Resiliencia (Ref.
120179): Muy bajo, población duplicada en un tiempo mínimo superior a 14 años (K=0.04; tm=14-17; tmax=67; Fec=48,000).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (86 of 100).
