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Opsaridium microcephalum

Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_onStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA ACTINOPTERYGII CYPRINIFORMES CYPRINIDAE

Scientific Name: Opsaridium microcephalum
Species Authority: (Günther, 1864)

Assessment Information [top]

Red List Category & Criteria: Vulnerable A2bcd ver 3.1
Year Published: 2006
Date Assessed: 2006-01-31
Assessor(s): Kazembe, J., Magombo, Z., Khawa, D. & Kaunda, E.
Reviewer(s): Snoeks, J. (Freshwater Fish Red List Authority) & Darwall, W. (Freshwater Biodiversity Assessment Programme)
Justification:
Endemic to Lake Malawi and its catchment area. Population reduction has been estimated at not less than 30% in the last 10 years. The causes of decline are overfishing and habitat degradation and these have not ceased.

Geographic Range [top]

Range Description: Endemic to Lake Malawi and its catchment area
Countries:
Native:
Malawi; Mozambique; Tanzania, United Republic of
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Declining due to overfishing and habitat degradation.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: Adults are found in shallow water in the lake over sand habitats. Juveniles occur in streams and near river outlets in the lake. It feeds on small zooplanktivorous fish, which move in shoals along the shoreline. It migrates upstream into large rivers to spawn in the cool waters of mountain streams. It spawns in a gravel substratum, often in very shallow water.
Systems: Freshwater

Threats [top]

Major Threat(s): Over-fishing of adults causes extremely high mortalities during spawning runs. Fish poisoning is widely practised although illegal. Deterioration of spawning grounds due to siltation from soil erosion (bad land practise as well as deforestation along rivers).

Conservation Actions [top]

Conservation Actions: None at present.

Citation: Kazembe, J., Magombo, Z., Khawa, D. & Kaunda, E. 2006. Opsaridium microcephalum. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 26 July 2014.
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