Country Species Summary

Alestes baremoze in Senegal
Silversides

Alestes baremoze (Joannis, 1835)
Family:	Alestidae (African tetras)	picture (Albar_u0.jpg) by Larsen, J.H.
Order:	Characiformes (characins)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:	Silversides
Max. size:	43.0 cm TL (male/unsexed; Ref. 2703); 40 cm TL (female); max. published weight: 500 g (Ref. 3023); max. reported age: 6 years
Environment:	benthopelagic; potamodromous; pH range: 6.5 - 7.80000019073486; dH range: 30
Climate:	tropical; 15 - 35°C
Global Importance:	fisheries: highly commercial
Resilience:	Medium, minimum population doubling time 1.4 - 4.4 years (K=0.42; tm=2-3; tmax=5)
Distribution:	Africa: Gambia, Senegal, Niger, the coastal basins of the Côte d'Ivoire (Comoé, Bandama and Sassandra), Volta, Chad basin, Nile, Lake Albert and Lake Turkana. Three forms exists: (Alestes baremoze soudaniensis) West African inland, (Alestes baremoze eburneensis) West African Coastal and (Alestes baremoze baremoze) Nilotic.
Diagnosis:	Dorsal spines (total): 2-2; Dorsal soft rays (total): 8-8; Anal spines: 3-3; Anal soft rays: 19-28; Vertebrae: 41-49. Silver colored with blue-gray black and white belly, grayish fins, entirely covered with scales; Sudanese fishes have orange colors on the inferior lobe of the caudal fin. External border of anal fin curves: slightly and regularly concave in females; forms an anterior lobe in males with some rays clearly longer. Well developed fontanel. Sympatric with A. dentex.
Biology:	Mainly diurnal. There is considerable flexibility in its diet, A. baremoze shifts from zooplankton to zoobenthos, detritus and macrophytes as plankton densities decline (Ref. 28714). Occurs at a temperature range of 14.6-35.0°C. In the Malamfatori area (Tchad), seine-net fishery on the River Yobe depends on seasonal upstream (from Lake Chad) and downstream migration during the flood (August-December) and dry (January-March) seasons, respectively. Also, there is an intensive gillnet fishery from July-October at the river mouth. A. baremoze moves offshore (in Lake Chad) beginning March
Threatened:	Not Evaluated, see IUCN Red List , (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Teugels, G.G., C. Lévêque, D. Paugy and K. Traoré. 1988. (Ref. 272)
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Senegal country information
Common names:	Sèlinthe, Giccal, Saara	Ref: Adams-Sow, A. (Ed.), 1996
Status:	native	Ref: Lévêque, C.D. Paugy and G.G. Teugels (eds.), 1990
Salinity:	freshwater
Uses:	no uses
Comments:	Occurs in the Senegal River (Ref. 28587).
Country Information:	www.cia.gov/cia/publications/factbook/geos/sg.html
National Fisheries Authority:	www.refer.sn/sngal_ct/eco/oeps/
Occurrences:	Occurrences Point map
Main Ref:	Adams-Sow, A. (Ed.), 1996
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Modified: Sa-a, Pascualita

Entered: Cruz, Tess

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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