Pollimyrus castelnaui (Boulenger, 1911)

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IUCN Red List Assessment:
Red List Category

LC
Least Concern

Red List Criteria

Version

3.1

Year Assessed

2010

Assessor/s

Bills, R., Marshall, B., Moelants, T., Tweddle, D. & Vreven, E.

Reviewer/s

Snoeks, J., Tweddle, D., Getahun, A., Laly, P., Paugy, D., Zaiss, R., Fishar, M.R.A & Brooks, E.

Contributor/s

Justification

This species has a wide distribution, with no known major widespread threats. It is therefore listed as Least Concern. It has also been assessed regionally as Least Concern for eastern and southern Africa, however taxonomic changes may affect the listings for isolated eastern populations. It is estimated that less than 5 % of the species is found in the central Africa region, and it is therefore categorized as Not Applicable.
Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorInternational Union for Conservation of Nature and Natural Resources
Sourcehttp://www.iucnredlist.org/apps/redlist/details/182769

Population:

Population

In southern Africa, the populations are widespread, although in some areas the species is uncommon where it occurs, e.g. in the Ruvuma Bills (2004) found it to be rare, while in the Lake Malawi system it is restricted to low-lying, well-watered areas on the northern lakeshore (Tweddle and Willoughby 1978). Also extremely rare in the Buzi River system. No information is available for other regions.

Population Trend

Unknown
Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorInternational Union for Conservation of Nature and Natural Resources
Sourcehttp://www.iucnredlist.org/apps/redlist/details/182769

Threats:

Major Threats

The species is widely distributed and has no immediate threats.
Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorInternational Union for Conservation of Nature and Natural Resources
Sourcehttp://www.iucnredlist.org/apps/redlist/details/182769

Least Concern (LC)

Licensehttp://creativecommons.org/licenses/by-nc/3.0/
Rights holder/AuthorRainer Froese, FishBase
Sourcehttp://www.fishbase.org/summary/SpeciesSummary.php?id=8769

Biology:

Inhabits dense vegetation along margins of rivers and floodplain lagoons (Ref. 7248). Often found in lagoons and backwaters in shallow water just underneath the surface vegetation (Ref. 13337). Feeds on aquatic insect larvae including a large component of Chironomidae (Ref. 13337).

Licensehttp://creativecommons.org/licenses/by-nc/3.0/
Rights holder/AuthorRainer Froese, FishBase
Sourcehttp://www.fishbase.org/summary/SpeciesSummary.php?id=8769

Conservation Actions:

Conservation Actions

The species is protected in reserves such as Kafue National Park on the Kafue River. More research is needed into this species taxonomy, population numbers and range, biology and ecology, and threats, as well as monitoring of population trends.
Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorInternational Union for Conservation of Nature and Natural Resources
Sourcehttp://www.iucnredlist.org/apps/redlist/details/182769

Range Description:

This species is found from the Democratic Republic of Congo to Tanzania, to Namibia to Mozambique.

Central Africa: Pollimyrus castelnaui is only known from the one location in the Zambian Congo River system (Luanshya junction Kitwe/Ndola road).

Eastern Africa: It is present in affluent streams in the northern part of Lake Malawi.

Southern Africa: This species is widespread throughout the Cunene, Okavango, This species is known from upper Zambezi and Kafue.

Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorInternational Union for Conservation of Nature and Natural Resources
Sourcehttp://www.iucnredlist.org/apps/redlist/details/182769

Importance:

fisheries: of no interest; aquarium: potential

Licensehttp://creativecommons.org/licenses/by-nc/3.0/
Rights holder/AuthorRainer Froese, FishBase
Sourcehttp://www.fishbase.org/summary/SpeciesSummary.php?id=8769

Africa: Okavango basin and upper Zambezi River; also from the Kafue and Cunene Rivers and northern areas of Lake Malawi (Ref. 52193). Also reported from the Luongo (lower Luapula tributary, upper Congo River basin) in Zambia (Ref. 27609, 94890).

Licensehttp://creativecommons.org/licenses/by-nc/3.0/
Rights holder/AuthorRainer Froese, FishBase
Sourcehttp://www.fishbase.org/summary/SpeciesSummary.php?id=8769

Southern Africa.

Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/
Rights holder/AuthorFishWise Professional, FishWise Professional
Sourcehttp://www.fishwisepro.com/Species/details.aspx?Zoom=True&SId=13241
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith