Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Cypriniformes Cyprinidae

Scientific Name: Achondrostoma occidentale
Species Authority: (Robalo, Almada, Sousa Santos, Moreira & Doadrio, 2005)

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2008
Date Assessed: 2008-01-01
Assessor(s): Freyhof, J. & Kottelat, M.
Reviewer(s): Bogutskaya, N., & Smith, K. (IUCN Freshwater Biodiversity Unit)
This species has a very restricted range (area of occupancy <500 km², extent of occurrence <5,000 km²), and found in only three streams (possibly two as the species is believed to be extirpated in Safarujo after it dried up) in Estremadura in Portugal where it is heavily impacted by domestic and agricultural pollution and water abstraction, especially during the summer dry period where the streams dry up.

Geographic Range [top]

Range Description:Portugal: Estremadura, in Alcabrichel, Sizandro and Safarujo drainages. It is believed the population in the Safarujo is extirpated after the stream dried up.
Countries occurrence:
Range Map:Click here to open the map viewer and explore range.

Population [top]

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

Habitat and Ecology [top]

Habitat and Ecology:Habitat:
Lower stretches of rivers.

No data. Spawns in April-May.

Threats [top]

Major Threat(s): The species is heavily impacted by pollution from domestic and agricultural sewage and water abstraction.

Conservation Actions [top]

Conservation Actions: No information.

Classifications [top]

5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)
suitability: Suitable  major importance:Yes

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
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

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

Bibliography [top]

IUCN. 2008. 2008 IUCN Red List of Threatened Species. Available at: (Accessed: 5 October 2008).

Kottelat, M. and Freyhof, J. 2007. Handbook of European Freshwater Fishes. Publications Kottelat, Cornol, Switzerland.

Robalo, J.I., Almada, V.C., Sousa-Santos, C., Moreira, M.I. and Doadrio, I. 2005. A new species of the genus Chondrostoma Agassiz, 1832 (Actynopterigii, Cyprinidae) from western Portugal.

Citation: Freyhof, J. & Kottelat, M. 2008. Achondrostoma occidentale. In: The IUCN Red List of Threatened Species 2008: e.T135683A4180158. . Downloaded on 07 October 2015.
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