Classificação / Names
Nomes comuns | Sinónimos | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (peixes com raios nas barbatanas)
(Catfish) > 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.
Environment: milieu / climate zone / depth range / distribution range
; Água doce demersal; intervalo de profundidade 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.
Length at first maturity / Tamanho / Peso / Idade
Maturity: Lm ?, range 20 - 33 cm
Max length : 55.0 cm TL macho/indeterminado; (Ref. 40637); common length : 25.0 cm TL macho/indeterminado; (Ref. 556); peso máx. Publicado: 2.7 kg (Ref. 40637); Idade máx. registada: 9 anos (Ref. 59043)
Espinhos dorsais (total): 1; Raios dorsais moles (total): 6-7; Espinhos anais 1. Caudal fin with 18-19 rays.
Occurs in pools and sluggish runs over soft substrates in creeks and small to large rivers. Also found in impoundments, lakes, and ponds (Ref. 86798). Rarely enters brackish waters (Ref. 1998). A nocturnal feeder that feeds mollusks, insects, leeches, crayfish and plankton, worms, algae, plant material, fishes and has been reported to feed on 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). Has 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)
Categoria na Lista Vermelha da IUCN (Ref. 120744)
CITES (Ref. 118484)
Ameaça para o homem
Pescarias: pouco comercial; Aquacultura: espécies comerciais; peixe desportivo: sim
Fontes da internet
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00871 (0.00535 - 0.01418), b=3.09 (2.95 - 3.23), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Nível Trófico (Ref. 69278
): 3.7 ±0.1 se; Based on diet studies.
Generation time: 2.3 ( na - na) years. Estimated as median LN(3)/K based on 1 growth studies.
Resiliência (Ref. 120179
): Médio, tempo mínimo de duplicação da população 1,4 - 4,4 anos (K=0.47; tm=3; tmax=8).
Vulnerabilidade (Ref. 59153
): Low to moderate vulnerability (30 of 100) .