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Aphanius saourensis 

Scope:Global
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_onStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Cyprinodontiformes Cyprinodontidae

Scientific Name: Aphanius saourensis
Species Authority: Blanco, Hrbek & Doadrio, 2006
Common Name(s):
English Sahara aphanius
French Aphanius saharien
Spanish Afanius sahariano

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) ver 3.1
Year Published: 2010
Date Assessed: 2007-10-17
Assessor(s): Azeroual, A.
Reviewer(s): Kraïem, M. & Smith, K.
Justification:
The species is endemic to the Oued Saoura basin, and was once thought to occur throughout it. It is now only known from one remnant population (Oued Saoura basin near Mazzer) in the Sahara desert, having known to have disappeared from numerous other localities (Oued Zousfana basin at Igli, El Ouata and Kerzaz - all in the greater Saoura basin). Numerous attempts have been made to record from these localities and no specimens were found. The major threats are the introduced Gambusia species, which currently outnumber Aphanius 100 to one. Excessive groundwater extraction (for agriculture), drought and water pollution are also threatening the species. Its survival in the wild is unlikely, but a small captive breeding program is under way. It has an extent of occurrence of less than 100 km² and an area of occupancy of less than 10 km².

Geographic Range [top]

Range Description: The species is endemic to the Oued Saoura basin, and was once thought to occur throughout it. It is now only known from one remnant population (near Mazzer) in the Sahara desert, having known to have disappeared from numerous other localities (Oued Zousfana basin at Igli, El Ouata and Kerzaz - all in the greater Saoura basin). Numerous attempts have been made to record from these localities and no specimens were found.

Recorded from Mazzer (30° 19'N, 2°16'W) inside the Oued Saoura basin, Villwock and Scholl (1982) analyzed specimens from Igli Oasis, Oued Zousfana basin, a tributary basin to the Saoura. Specimens from El Ouata (MRAC 83-002-P-0082-0111) and Kerzaz (MRAC A3-045-P-0906) are deposited in Royal African Museum in Tervuren, both of which are within the greater Oued Saoura basin and in geographic proximity to Mazzer; Kerzaz is the most distant locality, approximately 120 km away.
Countries occurrence:
Native:
Algeria
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: No information available.
Current Population Trend: Unknown
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: It is a benthopelagic species with preferred subtropical climate.
Systems: Freshwater

Use and Trade [top]

Use and Trade: This species is part of the aquarium trade.

Threats [top]

Major Threat(s): Introduced Gambusia holbrooki poses a serious threat, with current densities of Gambusia to Aphanius being more than 100 to one. In addition, excessive groundwater withdrawal for agricultural purposes, the drying of wetlands, and water pollution are also main threats to the species.

Conservation Actions [top]

Conservation Actions: A small captive breeding program is underway. More research is needed for this species, and it would benefit from habitat restoration, and the development of a Protected Area within its range.

Classifications [top]

5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)
suitability: Suitable  major importance:Yes
5. Wetlands (inland) -> 5.9. Wetlands (inland) - Freshwater Springs and Oases
suitability: Suitable  
1. Land/water protection -> 1.1. Site/area protection
2. Land/water management -> 2.3. Habitat & natural process restoration

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
  Subject to ex-situ conservation:Yes
In-Place Education
7. Natural system modifications -> 7.2. Dams & water management/use -> 7.2.8. Abstraction of ground water (unknown use)
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

8. Invasive & other problematic species & genes -> 8.1. Invasive non-native/alien species -> 8.1.2. Named species (Gambusia holbrooki)
♦ timing: Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.3. Indirect species effects -> 2.3.2. Competition

9. Pollution -> 9.1. Domestic & urban waste water -> 9.1.3. Type Unknown/Unrecorded
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

9. Pollution -> 9.2. Industrial & military effluents -> 9.2.3. Type Unknown/Unrecorded
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

9. Pollution -> 9.3. Agricultural & forestry effluents -> 9.3.4. Type Unknown/Unrecorded
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

11. Climate change & severe weather -> 11.2. Droughts
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats
1. Research -> 1.6. Actions
3. Monitoring -> 3.1. Population trends

♦  Pets/display animals, horticulture
 Local : ✓   National : ✓  International : ✓ 

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: Azeroual, A. 2010. Aphanius saourensis. The IUCN Red List of Threatened Species 2010: e.T182964A8012469. . Downloaded on 31 May 2016.
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