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Siluriformes (Catfishes) >
Ictaluridae (North American freshwater catfishes)
Etymology: Ameiurus: Greek, a = without + Greek, meiouros, -os, -on = without tail (Ref. 45335); nebulosus: nebulosus meaning clouded, in relation to mottled and grey coloring (Ref. 1998).
More on author: Lesueur.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
; acqua dolce demersale; potamodromo (Ref. 126106); distribuzione batimetrica 0 - 12 m (Ref. 1998). Subtropical; 0°C - 37°C (Ref. 35682); 54°N - 25°N, 104°W - 61°W (Ref. 86798)
North America: Atlantic and Gulf Slope drainages from Nova Scotia and New Brunswick in Canada to Mobile Bay in Alabama in USA; St. Lawrence-Great Lakes, Hudson Bay, and Mississippi River basins from Quebec west to southeastern Saskatchewan in Canada, and south to Louisiana, USA. Introduced into several countries. Several countries report adverse ecological impact after introduction.
Lunghezza alla prima maturità / Dimensione / Peso / Età
Maturità: Lm 26.6, range 20 - 33 cm
Max length : 55.0 cm TL maschio/sesso non determinato; (Ref. 40637); common length : 25.0 cm TL maschio/sesso non determinato; (Ref. 556); peso massimo pubblicato: 2.7 kg (Ref. 40637); Età massima riportata: 9 anni (Ref. 59043)
Spine dorsali (totale) : 1; Raggi dorsali molli (totale) : 6 - 7; Spine anali: 1. Caudal fin with 18-19 rays.
Body shape (shape guide): fusiform / normal.
Adults occur in pools and sluggish runs over soft substrates in creeks and small to large rivers. Also found in impoundments, lakes, and ponds (Ref. 86798). They rarely enter brackish waters (Ref. 1998). They are nocturnal feeders that feed on mollusks, insects, leeches, crayfish and plankton, worms, algae, plant material, fishes, eggs of least cisco, herring and lake trout (Ref. 1998). Juveniles (3-6 cm) feed mostly on chironomid larvae, cladocerans, ostracods, amphipods, bugs and mayflies (Ref. 1998). Can tolerate high carbon dioxide and low oxygen concentrations and temperatures up to 31.6 °C although experiments show upper lethal temp. to be 37.5 °C; resistant to domestic and industrial pollution (Ref. 1998). They have been observed to bury itself in mud to escape adverse environmental conditions (Ref. 1998). Prepared hot-smoked and also cooked in various ways (Ref. 1998).
Nests are built by one or both sexes. After a period of caressing each other with their barbels, male and female settle over the nest, face opposite directions (while maintaining body contact) and spawn. Although eggs are cared for by one or both parents, there have been reports of parents eating their own eggs. Caring entails fanning by the paired fins, moving and stirring by the barbels, and may be picked up and ejected from the mouth; this ensures hatching.
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)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Potential pest
Usi umani
Pesca: scarso interesse commerciale; Acquacoltura: commerciale; Pesce da pesca sportiva: si
Strumenti
Rapporti speciali
Scarica XML
Fonti Internet
Stime basate su modelli
Indice di diversità filogenetica (Fonte Biblio.
82804): PD
50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00832 (0.00640 - 0.01081), b=3.12 (3.04 - 3.20), in cm total length, based on LWR estimates for this species (Ref.
93245).
Livello trofico (Fonte Biblio.
69278): 3.7 ±0.1 se; based on diet studies.
Resilienza (Fonte Biblio.
120179): Medio, tempo minimo di raddoppiamento della popolazione 1.4 - 4.4 anni (K=0.47; tm=3; tmax=8).
Vulnerabilità della pesca (Ref.
59153): Moderate vulnerability (38 of 100).
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