Ameiurus nebulosus, Brown bullhead : fisheries, aquaculture, gamefish

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Ameiurus nebulosus (Lesueur, 1819)

Brown bullhead
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Ameiurus nebulosus
Picture by Zienert, S.

Classification / Names Nomi Comuni | Sinonimi | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterigi (pesci con pinne raggiate) > 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).  More on author: Lesueur.

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

; acqua dolce demersale; distribuzione batimetrica 0 - 12 m (Ref. 1998).   Subtropical; 0°C - 37°C (Ref. 35682); 54°N - 25°N, 104°W - 61°W (Ref. 86798)

Distribuzione Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | 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.

Length at first maturity / Size / Peso / Age

Maturity: Lm ?, 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)

Short description Morfologia | Morfometria

Spine dorsali (totale): 1; Raggi dorsali molli (totale): 6-7; Spine anali 1. Caudal fin with 18-19 rays.

Biologia     Glossario (es. 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).

Life cycle and mating behavior Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve

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 | Bibliografia | Coordinatore | Collaboratori

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 Red List Status (Ref. 120744)

  Least Concern (LC) ; Date assessed: 14 October 2011

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Potential pest





Human uses

Pesca: scarso interesse commerciale; Acquacoltura: commerciale; Pesce da pesca sportiva: si
FAO(pesca: production; publication : search) | FishSource |

Informazioni ulteriori

Nomi Comuni
Sinonimi
Metabolismo
Predatori
Ecotossicologia
Riproduzione
Maturità
Deposizione
Spawning aggregation
Fecundity
Uova
Egg development
Age/Size
Accrescimento
Length-weight
Length-length
Length-frequencies
Morfometria
Morfologia
Larve
Dinamica popolazioni larvali
Reclutamento
Abbondanza
Bibliografia
Acquacoltura
Profilo di acquacoltura
Varietà
Genetica
Frequenze alleliche
Ereditarietà
Malattie
Elaborazione
Mass conversion
Collaboratori
Immagini
Stamps, Coins Misc.
Suoni
Ciguatera
Velocità
Modalità di nuoto
Area branchiale
Otoliths
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Strumenti

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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5078   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00871 (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).
Trophic Level (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.
Resilienza (Ref. 120179):  Medio, tempo minimo di raddoppiamento della popolazione 1.4 - 4.4 anni (K=0.47; tm=3; tmax=8).
Vulnerability (Ref. 59153):  Low to moderate vulnerability (30 of 100) .
Price category (Ref. 80766):   Unknown.