Alestes affinis

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Bibliography

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	ACTINOPTERYGII	CHARACIFORMES	ALESTIDAE

Scientific Name:

Alestes affinis

Species Authority:

Günther,1894

Common Name/s:

English

–

Redfin Robber

Assessment Information [top]

Red List Category & Criteria:	Least Concern ver 3.1
Year Published:	2006
Assessor/s:	Hanssens, M. & Snoeks, J.
Reviewer/s:	Snoeks, J. (Freshwater Fish Red List Authority) & Darwall, W. (Freshwater Biodiversity Assessment Programme)
Justification: Widespread species. Threatened by netting during migrations but there is no information to indicate current decline.

Geographic Range [top]

Range Description:	Distributed in Ruaha-Rufiji system: Kidatu dam (extent of occurrence (EOO) = 10 km²), Mtera dam (EOO = 585 km²), Mindu dam (EOO = 4 km²) and rivers Ruaha, Pangani, Wami, and Rufiji. Total EOO <20,000 km².
Countries:	Native: Tanzania, United Republic of
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	Observed declining in Mtera dam (Chale and Mwaya 1984, Tamatamah 1996). Similarly a decline in population was reported for Mindu dam (Bwathondi and Kulekana 1986). The species composed less than 0.14% of fishery catches in the systems where present (Fish. Div. 1994, 1996).
Population Trend:	Unknown

Habitat and Ecology [top]

Habitat and Ecology:	The species occupies open waters or the pelagic environment. It migrates up the rivers for spawning during the rainy season. It is carnivorous, feeding on invertebrates, especially zooplankton, snails and insect larvae.
Systems:	Freshwater

Threats [top]

Major Threat(s):	Fishing across rivers during the migration using illegal small mesh nets and other methods. Siltation. Land based pollution.

Major Threat(s):

Fishing across rivers during the migration using illegal small mesh nets and other methods. Siltation. Land based pollution.

Conservation Actions [top]

Conservation Actions:	No information available.

Conservation Actions:

No information available.

Bibliography [top]

	Eccles, D.H. 1992. FAO species identification sheets for fishery purposes. Field guide to the freshwater fishes of Tanzania. Food and Agriculture Organization of the United Nations, Rome. IUCN. 2006. 2006 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 04 May 2006. Paugy, D. 1984. Characidae. In: J. Daget, J.-P. Gosse & D.F.E. Thys van den Audenaerde (eds). Checklist of the Freshwater Fishes of Africa (CLOFFA I). pp. 140?183. ORSTOM, Paris, France and MRAC, Tervuren, Belgium.

Eccles, D.H. 1992. FAO species identification sheets for fishery purposes. Field guide to the freshwater fishes of Tanzania. Food and Agriculture Organization of the United Nations, Rome.

IUCN. 2006. 2006 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 04 May 2006.

Paugy, D. 1984. Characidae. In: J. Daget, J.-P. Gosse & D.F.E. Thys van den Audenaerde (eds). Checklist of the Freshwater Fishes of Africa (CLOFFA I). pp. 140?183. ORSTOM, Paris, France and MRAC, Tervuren, Belgium.

Citation:	Hanssens, M. & Snoeks, J. 2006. Alestes affinis. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 23 May 2012.
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