| Kingdom | Phylum | Class | Order | Family |
|---|---|---|---|---|
| ANIMALIA | CHORDATA | ACTINOPTERYGII | CHARACIFORMES | ALESTIDAE |
| Scientific Name: | Alestes affinis | |||
| Species Authority: | Günther,1894 | |||
Common Name/s:
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| Red List Category & Criteria: | Least Concern ver 3.1 |
| Year Assessed: | 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. |
|
| 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
|
| 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: | 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 |
| Major Threat(s): | Fishing across rivers during the migration using illegal small mesh nets and other methods. Siltation. Land based pollution. |
| Conservation Actions: | No information available. |
| 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 07 February 2012. |
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