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Zingel asper

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA ACTINOPTERYGII PERCIFORMES PERCIDAE

Scientific Name: Zingel asper
Species Authority: (Linnaeus, 1758)
Common Name/s:
English Apron, Asper

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B2ab(iii) ver 3.1
Year Published: 2006
Date Assessed: 2006-01-31
Assessor/s: Crivelli, A.J.
Reviewer/s: Kottelat, M. & Darwall, W. (Mediterranean Workshop, Dec. 2004)
Justification:
Z. asper survives in four fragmented subpopulations with a combined area of occupancy (AOO) <10 km² with no hope of connectivity between them due to dam construction. A continuous decline in habitat quality has been observed due to pollution and water extraction. Two, or maybe three populations out of four have less than 250 adults. The fourth is probably larger. One or two of those subpopulations might become extinct over the next 10 years.
History:
1996 Critically Endangered
1994 Endangered (Groombridge 1994)
1990 Endangered (IUCN 1990)

Geographic Range [top]

Range Description: It is restricted four fragmented subpopulations in the Rhône River basin in France and Switzerland. May occur in more locations.
Countries:
Native:
France; Switzerland
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Decreasing. There are only four fragmented subpopulations remaining: the Drome subpopulation with few fish; the Durance subpopulation with 200 fish/ha; the Beaume subpopulation with 80 fish/ha; and a subpopulation in the upper part of River Doubs in Switzerland with a total number of individuals estimated between 80–160 individuals. Today it only occupies 17% of its former range.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: It inhabits the grayling zone and the upper barbel zone. It is a strictly nocturnal species feeding on benthic invertebrates. It prefers pebbles and stones, intermediate depth (0.3–0.8 m) and moderate water velocities (0.05–0.4 m/s). During reproduction, it prefers riffles. It is short-lived species up to 3.5 years old reproducing generally once, maximum twice in a life time.
Systems: Freshwater

Threats [top]

Major Threat(s): Fragmentation, modification and destruction of the habitat due to dams and water pollution.

Conservation Actions [top]

Conservation Actions: It is listed in Annexes II and IV of the European Union Habitats Directive and in Appendices II and III of the Bern Convention.
Citation: Crivelli, A.J. 2006. Zingel asper. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 16 April 2014.
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