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Bagrus orientalis

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA ACTINOPTERYGII SILURIFORMES BAGRIDAE

Scientific Name: Bagrus orientalis
Species Authority: Boulenger, 1902
Synonym/s:
Bagrus orientalis
Taxonomic Notes: The taxonomic status of Bagrus meridionalis and B. orientalis needs investigation.

Assessment Information [top]

Red List Category & Criteria: Least Concern     ver 3.1
Year Published: 2010
Assessor/s: Bayona, J., Bills, R., Engelbrecht, J. & Kazembe, J.
Reviewer/s: Snoeks, J., Tweddle, D., Getahun, A., Lalèyè, P., Paugy, D., Zaiss, R., Fishar, M.R.A & Brooks, E.
Justification:
A widely distributed species effected by local decline. The wider population is, however, not impacted by any known widespread major threats, and is therefore listed as Least Concern. Although not abundant it is sufficiently widespread to be also classified as Least Concern in regional assessments for eastern and southern Africa.
History:
2006 – Least Concern (IUCN 2006)

Geographic Range [top]

Range Description: This species is found in southeastern Africa:

Eastern Africa: Within Tanzania, this species is distributed in Mtera dam , Kidatu dam, Rivers Pangani, Ruvuma and Rufiji. In Malawi, it is reported to occur in Lake Chiuta.

Southern Africa:It is present in the Rovuma River system, from the Mozambique-Tanzanian border north to the Pangani system in Tanzania. Also present in Lake Chiuta, Malawi which is tenuously linked to the Rovuma system.
Countries:
Native:
Malawi; Mozambique; Tanzania, United Republic of
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Little information is known on the population trends of this species, however it is reported to be declining in Tanzania.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: It is distributed in deep waters of large rivers and lakes. It is a predator, that feeds sometimes on shrimp.
Systems: Freshwater

Threats [top]

Major Threat(s): Threats to this species include:
  • ­Mass kills due to asphyxiation. A serious event was observed in Tanzania in 1984.
  • ­Illegal fishing practice, especially by use of under meshed gill-nets and other illegal techniques.
  • ­Weed infestation and high turbidity.

Conservation Actions [top]

Conservation Actions: No information available. More research is needed into this species population numbers and range, biology and ecology, habitat status and threats, as well as monitoring and potential conservation measures. Sustainable management of riverine fisheries is also needed.

Bibliography [top]

Pan-Africa freshwater assessment references. Currently, full citations for references used in the Pan-Africa biodiversity assessments are unavailable on the Red List web site. These will be added to the site in 2011. We apologise for any inconvenience this causes.

IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).
Citation: Bayona, J., Bills, R., Engelbrecht, J. & Kazembe, J. 2010. Bagrus orientalis. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 23 May 2012.
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