Bagrus orientalis

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Bibliography

View Printer Friendly

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 Assessed:

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 map to view full version)

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.

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.

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).

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 09 February 2012.
Disclaimer:	To make use of this information, please check the <Terms of Use>.
Feedback:	If you see any errors or have any questions or suggestions on what is shown on this page, please fill in the feedback form so that we can correct or extend the information provided