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Alosa vistonica

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 CLUPEIFORMES CLUPEIDAE

Scientific Name: Alosa vistonica
Species Authority: Economidis & Sinis, 1986
Taxonomic Notes: Considered by some people to be a subspecies.

Assessment Information [top]

Red List Category & Criteria: Critically Endangered A2ace; B1ab(iii,v) ver 3.1
Year Published: 2006
Date Assessed: 2006-01-31
Assessor(s): Crivelli, A.J.
Reviewer(s): Barbieri, R, & Bianco, G. (Mediterranean Workshop, Dec. 2004)
Justification:
This species is restricted to a small coastal lake (estimated extent of occurrence (EOO) 40 km²). A major decline in the population was observed some 20 years previously. Although no one has surveyed the population in the last 20 years there is no reason to suspect this trend is not continuing (the threats all remain). The species is assessed as Critically Endangered where a greater than 80% decline in the population is suspected in the last 10 years based on direct observations of habitat decline, reduction in water quality, and increasing salinity and pollutants.

Geographic Range [top]

Range Description: It is restricted to coastal Lake Vistonis in northern Greece.
Countries:
Possibly extinct:
Greece
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: According to the available information the species is possibly extinct. A small population is hypothesized to survive in some channels or streams outflow into the lake (Bobori et al. 2001).
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: It mainly occupies the upper part of Lake Vistonis where the water is exclusively fresh. It is probably a non-migratory shad. Reproduction occurs in the spring.
Systems: Freshwater

Threats [top]

Major Threat(s): Habitat destruction and pollution (organic and industrial). Sewage enters the lake from the nearby town of Xanthi. Water extraction from the inflowing streams is also a serious threat as it may lead to increasing salinity within the lake.

Conservation Actions [top]

Conservation Actions: On paper Greek laws on fishery management protect it, but they are rarely enforced.

Citation: Crivelli, A.J. 2006. Alosa vistonica. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 19 September 2014.
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