Country Species Summary

Ameiurus nebulosus in Chile
Brown bullhead

Ameiurus nebulosus (Lesueur, 1819)
Family:	Ictaluridae (North American freshwater catfishes)	picture (Amneb_u2.jpg) by Zienert, S.
Order:	Siluriformes (catfish)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:	Brown bullhead
Max. size:	55.0 cm TL (male/unsexed; Ref. 40637); max. published weight: 2,740 g (Ref. 40637); max. reported age: 9 years
Environment:	demersal ; depth range - 40 m
Climate:	temperate; 0 - 38°C; 54°N - 25°N
Global Importance:	fisheries: minor commercial; aquaculture: commercial
Resilience:	Medium, minimum population doubling time 1.4 - 4.4 years (K=0.47; tm=3; tmax=8)
Distribution:	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).
Diagnosis:	Dorsal spines (total): 1-1; Dorsal soft rays (total): 6-7; Anal spines: 1-1. Caudal fin with 18-19 rays.
Biology:	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)
Threatened:	Not Evaluated, see IUCN Red List , (Ref. 36508)
Dangerous:	potential pest
Coordinator:
Main Ref:	Page, L.M. and B.M. Burr. 1991. (Ref. 5723)
Update \| Add

Chile country information
Common names:	[ No common name ]	Ref:
Status:	introduced	Ref: Pérez, J.E., C. Alfonsi, M. Nirchio, C. Muñoz and J.A. Gómez, 2003
Salinity:	freshwater
Uses:	no uses
Comments:	Has created adverse situation for native species (Ref. 52860).
Country Information:	www.cia.gov/cia/publications/factbook/geos/ci.html
Occurrences:	Occurrences Point map
Main Ref:	Welcomme, R.L., 1988
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Modified: Casal, Christine Marie V.

Entered: Welcomme, Robin L.

CGNET - US

Page created by: Eli, 20.10.03, last modified by Eli, 26.06.07

	Ref.:		Glossary
		(e.g. 9948)		(e.g. cephalopods)
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