Raiamas moorii

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	ACTINOPTERYGII	CYPRINIFORMES	CYPRINIDAE

Scientific Name:

Raiamas moorii

Species Authority

(Boulenger,1900)

Common Name/s:

English

–

Lake Rukwa Minnow

Assessment Information [top]

Red List Category & Criteria:	Least Concern ver 3.1
Year Assessed:	2006
Assessor/s	Natakimazi, G. & Hanssens, M.
Evaluator/s:	Snoeks, J. (Freshwater Fish Red List Authority) & Darwall, W. (Freshwater Biodiversity Assessment Programme)
Justification: Widespread distribution with no major widespread threats identified.

Geographic Range [top]

Range Description:	Endemic to Lake Tanganyika and the Lake Kivu systems linked by the Rusizi. It is found in the streams and rivers flowing into these lakes, including the Malagarasi. Also found in Lake Rukwa.
Countries:	Native: Burundi; Rwanda; Tanzania, United Republic of

Population [top]

Population:	This species contribution to the fisheries catch compositions in Lake Rukwa declined from 1.77% in 1977 (Bernacsek 1980) to less than 0.3% by 1994 (Fish. Div. 1994). Similarly CPUE has declined from 0.2 tons/vessel in 1977 to less than 0.1 tons/vessel in 1994 (Fish. Div. 1994, 1977). The Lake Rukwa population has therefore declined by about 50%. It is still common in fishery catches in inshore waters of lakes Tanganyika and Kivu and in the lower parts of rivers Rusizi and Malagarasi.
Population Trend:	Unknown

Population:

This species contribution to the fisheries catch compositions in Lake Rukwa declined from 1.77% in 1977 (Bernacsek 1980) to less than 0.3% by 1994 (Fish. Div. 1994). Similarly CPUE has declined from 0.2 tons/vessel in 1977 to less than 0.1 tons/vessel in 1994 (Fish. Div. 1994, 1977). The Lake Rukwa population has therefore declined by about 50%. It is still common in fishery catches in inshore waters of lakes Tanganyika and Kivu and in the lower parts of rivers Rusizi and Malagarasi.

Population Trend:

Unknown

Habitat and Ecology [top]

Habitat and Ecology:	Found in sandy bays of lakes and rivers (Eccles 1992) where it feeds on smaller fishes and insects. In the Rukwa drainage it is found in lake itself and in the rivers entering the lake, but prefers the latter habitat (Seegers 1996). It migrates up the rivers to spawn (Seegers 1996). Feeds on small fish fry and, in the rivers, probably also on insects and other small animals (Seegers 1996).
Systems:	Freshwater

Threats [top]

Major Threat(s):	Land based pollution; illegal fishing practice; and erosion and siltation.

Major Threat(s):

Land based pollution; illegal fishing practice; and erosion and siltation.

Conservation Actions [top]

Conservation Actions:	No information.

Conservation Actions:

No information.

Citation:	Natakimazi, G. & Hanssens, M. 2006. Raiamas moorii. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 22 November 2008.
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