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Alestes stuhlmannii in Tanzania, United Rep. of

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Alestes stuhlmannii   Pfeffer, 1896
Family:	Alestidae (African tetras)			picture (Alstu_u0.gif) by FAO
Order:	Characiformes  (characins)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:
Max. size:	21.0 cm SL (male/unsexed; Ref. 4967)
Environment:	pelagic
Climate:	tropical
Global Importance:
Resilience:	High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)
Distribution:	Africa: coastal rivers of Tanzania (Kingani, Wami, Ruvu, Rufiji, Kilombero) (Ref. 5331).
Diagnosis:	Dorsal spines (total): 0-0; Dorsal soft rays (total): 9-11; Anal spines: 0-0; Anal soft rays: 22-27; Vertebrae: 42-44. Alestes stuhlmannii is fusiform with a terminal mouth and a snout that becomes more blunt in larger individuals (Ref. 79648). The dorsal fin is in the middle of the back, and the adipose fin is closer to the caudal than to the dorsal fin (Ref. 79648). The anal fin base is much longer than the dorsal fin base (Ref. 79648). The body is covered with large cycloid scales which extend onto the bases of the anal and caudal fins; there are no scales on the head and none on the supraoccipital crest (Ref. 79648). In preserved specimens, the flanks are usually darker dorsally than ventrally; a thin, dark line runs along the flank from the posterior edge of the opercle to the base of the caudal fin rays; it does not follow the lateral line and is not confined to a single scale row (Ref. 79648).
Biology:	Inhabits lakes and rivers (Ref. 4967)
Threatened:	, (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Paugy, D.. 1984. (Ref. 5331)
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Tanzania, United Rep. of country information
Common names:	Ngacha, Kasa		Ref:  Eccles, D.H., 1992
Status:	native		Ref:  Paugy, D., 1984
Salinity:	freshwater
Uses:	no uses
Comments:	Known from Wami River (Ref. 4967), Ruvu River (Ref. 4967), Kingani River (Ref. 4967) and Rufuji River (Ref. 4967, 79648).
Country Information:	www.cia.gov/cia/publications/factbook/geos/tz.html
National  Fisheries  Authority:	www.isp.msu.edu/AFRICANSTUDIES/PLEA/TAFIRI.HTM
Occurrences:	Occurrences    Point map
Main Ref:	Eccles, D.H., 1992
Update

More information:	Countries FAO areas Occurrences Introductions Ecosystem Ecology Diet Food items Food consumption Ration Predators Ciguatera Fish loss Common names Synonyms Pictures Sounds Reproduction Maturity Spawning Eggs Egg dev. Larvae Larval dynamics References Growth L-W relationship L-L relationship Length frequencies Recruitment Max. age & size Metabolism Morphology Morphometrics Gill area Brains Vision Collaborators Genetics Allele frequencies Heritability Strains Aquaculture Aquaculture profile Diseases Ecotoxicology Processing Speed Swim. type Stamps
	Note: No data are available if label is black .
Tools:	Biogeographic modelling | E-book | Field guide | Length-frequency Wizard | Life-history tool |
Internet sources:	BiOSC Point Data | CISTI | Google | GOBASE | GenBank ( genome, nucleotide ) | PubMed | Scirus | Tree of Life | Zoological Record
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	Modified:  Boden, Gert	Entered:  Sa-a, Pascualita

	Ref.:				Glossary
		(e.g. 9948)				(e.g. cephalopods)
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Page created by: Eli, 20.10.03, last modified by Eli, 26.06.07