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Siluriformes (Catfishes) >
Ictaluridae (North American freshwater catfishes)
Etymology: Ictalurus: Greek, ichtys = fish + Greek, ailouros = cat (Ref. 45335); punctatus: Ictalurus (Greek)=fish cat; punctatus (Latin)=spotted (referring to the dark spots on the body) (Ref. 79012).
More on author: Rafinesque.
Environment: milieu / climate zone / depth range / distribution range
Ökologie
; süßwasser demersal; pH range: 6.0 - 8.0; dH range: 4 - 30; tiefenbereich 0 - 15 m (Ref. 9988). Subtropical; 10°C - 32°C (Ref. 12741); 55°N - 25°N, 110°W - 70°W (Ref. 86798)
North America: St. Lawrence-Great Lakes, Hudson Bay (Red River drainage), and Missouri-Mississippi river basins from southern Quebec to southern Manitoba and Montana south to Gulf. Possibly native on Atlantic and Gulf slopes from Susquehanna River to Neuse River, and from Savannah River to Lake Okeechobee, Florida, and west to northern Mexico and eastern New Mexico. Introduced throughout most of US.
Length at first maturity / Size / Gewicht / Alter
Maturity: Lm 43.1, range 54 - 67.2 cm
Max length : 132 cm TL Männchen/unbestimmt; (Ref. 26550); common length : 57.0 cm SL Männchen/unbestimmt; (Ref. 59043); max. veröff. Gewicht: 26.3 kg (Ref. 4699); max. veröff. Alter: 24 Jahre (Ref. 59043)
Usually bluish olive, gray or black on the upper part of the body, becoming white below; dark spots usually scattered along the sides; older males dark in color, the head looking very wide when seen from the top; long barbels surrounding the mouth and the tail deeply forked (Ref. 44091).
Inhabits lakes and deep pools and runs over sand or rocks in small to large rivers (Ref. 86798). Adults occur in rivers and streams and prefer clean, well oxygenated water (Ref. 9988), but also in ponds and reservoirs (Ref. 10294, 44091). Recorded as having been or being farmed in rice fields (Ref. 119549). Feeds primarily on small fish, crustaceans (e.g. crayfish), clams and snails; also on aquatic insects and small mammals (Ref. 9669, 10294, 44091). Marketed fresh, smoked and frozen; eaten steamed, fried, broiled, boiled, microwaved and baked (Ref. 9988). Albino form common in the aquarium trade (Ref. 13371).
Spawning happens, depending on latitude, during the months of April-July, with temperatures between 27-28°C. Females lay their egges on a hole dug on sandy grounds. Incubation lasts 3-8 days, and larval development between 12-16 days, depending on temperature. The pair builds a depression in the ground, which is guarded by the male (Ref. 1672). Channel catfish requires cool water and short day lengths during the winter months for proper egg development; an egg mass can contain up to 20,000 eggs (Ref. 44091). Sexual maturity is reached at 2-3 years.
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 Rote Liste Status (Ref. 130435)
Bedrohung für Menschen
Potential pest (Ref. 13371)
Nutzung durch Menschen
Fischereien: hoch kommerziell; Aquakultur: kommerziell; Sportfisch: ja; Aquarium: Kommerziell
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00525 (0.00423 - 0.00651), b=3.13 (3.07 - 3.19), in cm total length, based on LWR estimates for this species (Ref.
93245).
Trophic level (Ref.
69278): 4.2 ±0.3 se; based on diet studies.
Widerstandsfähigkeit (Ref.
120179): niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (K=0.06; tmax=16).
Fishing Vulnerability (Ref.
59153): High to very high vulnerability (73 of 100).
Nutrients (Ref.
124155): Calcium = 22.8 [11.8, 67.3] mg/100g; Iron = 0.813 [0.451, 1.504] mg/100g; Protein = 16.6 [15.0, 18.5] %; Omega3 = 0.562 [0.205, 1.585] g/100g; Selenium = 37.9 [14.7, 99.1] μg/100g; VitaminA = 22.8 [6.5, 76.8] μg/100g; Zinc = 0.765 [0.504, 1.122] mg/100g (wet weight); based on
nutrient studies.
