Environment: milieu / climate zone / depth range / distribution range
Ecologia
; acqua dolce; salmastro benthopelagico; potamodromo (Ref. 51243); distribuzione batimetrica 0 - 27 m (Ref. 11002). Subtropical; 1°C - 29°C (Ref. 12741); 70°N - 30°N, 137°W - 69°W (Ref. 86798)
North America: St. Lawrence-Great Lakes, Arctic, and Mississippi River basins from Quebec to Northwest Territories in Canada, and south to Alabama and Arkansas in the USA; possibly native to Mobile Bay basin. Widely introduced elsewhere in the USA, including Atlantic and Pacific drainages.
Length at first maturity / Size / Peso / Age
Maturity: Lm 42.5, range 36 - 44.8 cm
Max length : 107 cm FL maschio/sesso non determinato; (Ref. 1998); common length : 54.0 cm TL maschio/sesso non determinato; (Ref. 12193); peso massimo pubblicato: 11.3 kg (Ref. 4699); Età massima riportata: 29 anni (Ref. 12193)
Spine dorsali (totale) : 13 - 17; Raggi dorsali molli (totale) : 18 - 22; Spine anali: 2; Raggi anali molli: 11 - 14; Vertebre: 44 - 48. Nuptial tubercles absent. Differentiation of sexes difficult. Branchiostegal rays 7,7 or 7,8 (Ref. 1998).
Occurs in lakes, pools, backwaters, and runs of medium to large rivers. Frequently found in clear water, usually near brush (Ref. 86798). Prefers large, shallow lakes with high turbidity (Ref. 9988, 10294). Rarely found in brackish waters (Ref. 1998). Feeds at night, mainly on insects and fishes (prefers yellow perch and freshwater drum but will take any fish available) but feeds on crayfish, snails, frogs, mudpuppies, and small mammals when fish and insects are scarce (Ref. 1998). Although not widely farmed commercially for consumption, large numbers are hatched and raised for stocking lakes for game fishing (Ref. 9988). Utilized fresh or frozen; eaten pan-fried, broiled, microwaved and baked (Ref. 9988).
Spawning occurs in small groups (a larger female and two smaller males or two females and up to six males) that engage in chasing, circular swimming, and fin erection. The group then ascends to shallow water, females roll on their side, and eggs and sperm are released. Deposition of eggs usually occurs in a single night (Ref. 1998). Larvae pelagic (Ref. 7471).
Page, L.M. and B.M. Burr, 2011. A field guide to freshwater fishes of North America north of Mexico. Boston : Houghton Mifflin Harcourt, 663p. (Ref. 86798)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Pesca: commerciale; Acquacoltura: sperimentale; Pesce da pesca sportiva: si; Acquario: Acquari pubblici
Strumenti
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00631 (0.00480 - 0.00830), b=3.15 (3.07 - 3.23), in cm total length, based on LWR estimates for this species (Ref.
93245).
Trophic level (Ref.
69278): 4.5 ±0.0 se; based on diet studies.
Generation time: 3.7 (3.0 - 3.8) years. Estimated as median ln(3)/K based on 42
growth studies.
Resilienza (Ref.
120179): Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (K=0.05-0.45; tm=2-4; tmax=29; Fec=41,061).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (45 of 100).
Nutrients (Ref.
124155): Calcium = 83.9 [34.8, 196.2] mg/100g; Iron = 0.483 [0.192, 1.201] mg/100g; Protein = 18.1 [16.9, 19.3] %; Omega3 = 0.17 [0.07, 0.35] g/100g; Selenium = 7.44 [1.82, 31.88] μg/100g; VitaminA = 18.6 [6.9, 51.0] μg/100g; Zinc = 0.913 [0.526, 1.539] mg/100g (wet weight); based on
nutrient studies.
