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Ameiurus nebulosus (Lesueur, 1819)

Brown bullhead
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Ameiurus nebulosus
Picture by Zienert, S.

Classificatie / Names Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

> 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.

Environment: milieu / climate zone / depth range / distribution range Ecologie

; zoet water demersaal; diepte 0 - 12 m (Ref. 1998). Subtropical; 0°C - 37°C (Ref. 35682); 54°N - 25°N, 104°W - 61°W (Ref. 86798)

Verspreiding Landen | FAO regio's | Ecosystemen | Voorkomen | Point map | Introducties | Faunafri

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.

Lengte bij maturiteit / Grootte / Gewicht / Leeftijd

Maturity: Lm 26.6, range 20 - 33 cm
Max length : 55.0 cm TL mannelijk / geslacht onbekend; (Ref. 40637); common length : 25.0 cm TL mannelijk / geslacht onbekend; (Ref. 556); max. gepubliceerd gewicht: 2.7 kg (Ref. 40637); max. gerapporteerde leeftijd: 9 Jaren (Ref. 59043)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale stekels (totaal) : 1; Dorsale zachte stralen (totaal) : 6 - 7; Anale stekels: 1. Caudal fin with 18-19 rays.

Biologie     Verklarende woordenlijst (bv. epibenthic)

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).

Levenscyclus en paargedrag Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven

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.

Hoofdreferentie Upload your references | Referenties | Coördinator | Medewerkers

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)

Status op de Rode Lijst van het IUCN (Ref. 130435)

  Niet bedreigd (LC) ; Date assessed: 14 October 2011

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Potential pest





Gebruik door de mens

Visserij: van minder commercieel belang; Aquacultuur: commercieel; sportvis: ja
FAO - visserij: aanvoer; Publication: search | FishSource |

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Life cycle
Voortplanting
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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.5078   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00871 (0.00540 - 0.01405), b=3.09 (2.95 - 3.23), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trofisch niveau (Ref. 69278):  3.7   ±0.1 se; based on diet studies.
Weerstandsvermogen (Ref. 120179):  Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (K=0.47; tm=3; tmax=8).
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (38 of 100).
Prijsklasse (Ref. 80766):   Unknown.