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Pollimyrus nigricans

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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Taxonomic Notes: Also reported as Marcusenius nigricans (antiquated binomen) (Seegers et al., unpublished).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
Date Assessed: 2006-01-31
Assessor(s): Twongo, T.K.
Reviewer(s): Snoeks, J. (Freshwater Fish Red List Authority) & Darwall, W. (Freshwater Biodiversity Assessment Programme)
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.

Conservation Actions [top]

Conservation Actions: No information available.

Citation: Twongo, T.K. 2006. Pollimyrus nigricans. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 29 August 2014.
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