Ameiurus nebulosus  (Lesueur, 1819)

Brown bullhead
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Ameiurus nebulosus   AquaMaps   Data sources: GBIF OBIS
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Image of Ameiurus nebulosus (Brown bullhead)
Ameiurus nebulosus
Picture by Zienert, S.

Classification / Names Populärnamn | synonymer | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (strålfeniga fiskar) > Siluriformes (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).

Miljö / Klimat / Range Ekologi

; sötvatten; brackvatten bottenlevande; djupintervall ? - 40 m (Ref. 1998).   Temperate; 0°C - 37°C (Ref. 35682); 54°N - 25°N

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

North America: Atlantic and Gulf Slope drainages from Nova Scotia and New Brunswick in Canada to Mobile Bay in Alabama in USA, and St. Lawrence-Great Lakes, Hudson Bay and Mississippi River basins from Quebec west to Saskatchewan in Canada and south to Louisiana, USA. Introduced into several countries. Several countries report adverse ecological impact after introduction. Asia: Iran and Turkey (Ref. 39702).

Size / Vikt / Age

Maturity: Lm ?  range ? - ? cm
Max length : 55.0 cm TL hane/ej könsbestämd; (Ref. 40637); common length : 25.0 cm TL hane/ej könsbestämd; (Ref. 556); publicerad maxvikt: 2.7 kg (Ref. 40637); rapporterad maxålder: 9 år (Ref. 59043)

Short description Morfologi | Morfometri

Taggstrålar i ryggfenan (totalt): 1; Mjukstrålar i ryggfenan (totalt): 6-7; Taggstrålar i analfenan 1. Caudal fin with 18-19 rays.

Biologi     Ordlista (t.ex. epibenthic)

Occurs in pools and sluggish runs over soft substrates in creeks and small to large rivers. Also found in impoundments, lakes, and ponds. 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).

Life cycle and mating behavior Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver

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.

Main reference Upload your references | referenser | Koordinator | Medarbetare

Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Potential pest




Human uses

Fiskeri: mindre kommeriell; Vattenbruk: kommersiell; sportfisk: ja
FAO(fiskeri: produktion; publication : search) | FisheriesWiki | Sea Around Us

Ytterligare information

Age/Size
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Length-weight
Length-length
Length-frequencies
Morfometri
Morfologi
Larver
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referenser
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Otoliths
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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5078   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00933 (0.00573 - 0.01519), b=3.07 (2.93 - 3.21), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trofisk nivå (Ref. 69278):  3.7   ±0.1 se; Based on diet studies.
Resiliens (Ref. 69278):  Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (K=0.47; tm=3; tmax=8).
Prior r = 1.01, 2 SD range = 0.75 - 1.36, log(r) = 0.01, SD log(r) = 0.15, Based on: 1 K, 2 tgen, 1 tmax, records
Vulnerability (Ref. 59153):  Low to moderate vulnerability (30 of 100) .
Price category (Ref. 80766):   Unknown.