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Hydrobia acuta

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA MOLLUSCA GASTROPODA LITTORINIMORPHA HYDROBIIDAE

Scientific Name: Hydrobia acuta
Species Authority: (Draparnaud, 1805)
Synonym/s:
Hydrobia neglecta Muus, 1963
Taxonomic Notes: Two subspecies are recognised, Hydrobia acuta acuta (Draparnaud 1805) and Hydrobia acuta neglecta (Muus 1963). Synonyms include Peringia minoricensis Paladilhe, 1875; Paludestrina tetropsoides, Paladihe, 1870; Obrovia salaria, Radoman, 1973; Obrovia testadura, Radoman, 1973 (D.V. Damme pers. comm. 2011).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2011
Date Assessed: 2011-07-22
Assessor/s: Van Damme, D.
Reviewer/s: Böhm, M. & Collen, B.
Justification:
Hydrobia acuta has been assessed as Least Concern. Whilst in parts of its range this species is known to be undergoing localised declines, this species is widespread throughout the coastal zones of Europe and the Mediterranean. In parts of its European range, the subspecies H. a. neglecta  is listed on national Red List assessments, and although it may be affected by localised threat processes, further research into the species' population trends is needed to assess the impacts of these threats on a global scale.

Geographic Range [top]

Range Description: This species is found in the Sea of Azov, Black Sea and western Russia (Selifonova 2008). The subspecies H. a. acuta is distributed throughout the western Mediterranean, whilst subspecies H. a. neglecta has a scattered distribution across the eastern English Channel, North Sea, Baltic Sea and Norwegian Sea (Wilke and Pfenninger 2002).
Countries:
Native:
Algeria; Belgium; Denmark; France; Germany; Greece (Greece (mainland)); Ireland; Italy (Italy (mainland), Sardegna, Sicilia); Latvia; Lithuania; Macedonia, the former Yugoslav Republic of; Malta; Morocco; Netherlands; Norway; Poland; Russian Federation (Kaliningrad, Northwest European Russia); Spain (Spain (mainland)); Sweden; Tunisia; Ukraine (Krym, Ukraine (main part)); United Kingdom (Great Britain)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is described as abundant in salt water lagoons (Britton 1985, Koutsoubas et al. 2000), however H. a. neglecta is known to be undergoing large localised declines in Ireland and has suffered large population losses, particularly in Northern Ireland (Byrne et al. 2009). The maximum density of 6,000 individuals per m2 was found in a hypersaline lagoon in the Camargue (France) (Britton 1985).
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: This species is found in shallow brackish and saline coastal lagoons and estuaries, and in the littoral zones of inland seas (Britton 1985, Pantazidou et al. 2006). This species is a deposit feeding herbivore, and occurs on aquatic macrophytes, sandy and muddy substrates (Koutsoubas et al. 2000, Evagelopoulos et al. 2009).
Systems: Freshwater; Marine

Threats [top]

Major Threat(s): Localised threats to this species include lagoonal salination, organic pollution, land reclamation and infilling of coastal habitats (Oliver 2007).

Conservation Actions [top]

Conservation Actions: Subspecies H. a. neglecta is listed as Endangered under B2ab(iii,iv) on the Irish Red List (Byrne et al. 2009), and as Endangered on the Red List of Malta (under pre-1994 criteria) (Schembri and Sultana 1989). Further research is required into the population trends of H. a. neglecta elsewhere throughout its range.
Citation: Van Damme, D. 2011. Hydrobia acuta. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 18 April 2014.
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