Pollimyrus nigricans

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	ACTINOPTERYGII	OSTEOGLOSSIFORMES	MORMYRIDAE

Scientific Name:

Pollimyrus nigricans

Species Authority:

(Boulenger, 1906)

Common Name/s:

English

–

Dark Stonebasher

Taxonomic Notes:

Also reported as Marcusenius nigricans (antiquated binomen) (Seegers et al., unpublished).

Assessment Information [top]

Red List Category & Criteria:	Least Concern ver 3.1
Year Published:	2006
Assessor/s:	Twongo, T.K.
Reviewer/s:	Snoeks, J. (Freshwater Fish Red List Authority) & Darwall, W. (Freshwater Biodiversity Assessment Programme)
Contributor/s:
Justification: Wide distribution although rarely encountered. No major threats identified to impact on the whole population.

Geographic Range [top]

Range Description:	Lake Victoria basin (Seegers et al. unpub.); Lakes Nabugabo and Kyoga; the Kiruni River (Semuliki valley); upper and middle Akagera. Malagarasi drainage.
Countries:	Native: Burundi; Kenya; Tanzania, United Republic of; Uganda
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	Rarely encountered but may be locally very abundant.
Population Trend:	Unknown

Habitat and Ecology [top]

Habitat and Ecology:	Favours shallow soft bottom habitats near fringing vegetation such as papyrus and Vossia (Okedi 1971). Feeds on insects, particularly chironomid larvae, caridina and caenid larvae (Okedi 1971). A male/female ratio of 1:10.5 has been noted in this species (Okedi 1969). Max. size: 10.0 cm SL.
Systems:	Freshwater

Threats [top]

Major Threat(s):	Introduced fish species have possibly contributed to the decline of the species; loss of Papyrus swamps and other vegetated wetlands around rivers and lakes due to agriculture extension.

Major Threat(s):

Introduced fish species have possibly contributed to the decline of the species; loss of Papyrus swamps and other vegetated wetlands around rivers and lakes due to agriculture extension.

Conservation Actions [top]

Conservation Actions:	No information available.

Conservation Actions:

No information available.

Citation:	Twongo, T.K. 2006. Pollimyrus nigricans. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 21 May 2013.
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