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Clupeiformes (Herrings) >
Alosidae (Shads and Sardines)
Etymology: Alosa: Latin, alausa = a fish cited by Ausonius and Latin, halec = pickle, dealing with the Greek word hals = salt; it is also the old Saxon name for shad = "alli" ; 1591 (Ref. 45335).
More on author: Regan.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
; sötvatten pelagic-neritic. Temperate
Europe: Endemic to Ireland.
Storlek / Vikt / Ålder
Könsmognad: Lm ?  range ? - ? cm
Max length : 20.0 cm SL hane/ej könsbestämd; (Ref. 59043); rapporterad maxålder: 5 år (Ref. 59043)
Kort beskrivning
Bestämningsnycklar | Morfologi | Morfometri
This species is distinguished from its congeners entering the freshwater in Atlantic basin by having 43-53 thin gill rakers at about 15-20 cm SL (Ref. 59043).
Body shape (shape guide): fusiform / normal.
Adults are pelagic in lacustrine areas (Ref. 59043). The females are larger than males. They spawn in June to July on gravel bars and gravelled shallows around large islands of the lake. Feed mainly on zooplankton. Population occupies a very small range and is threatened by eutrophication (Ref. 59043).
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Kottelat, M., 1997. European freshwater fishes. An heuristic checklist of the freshwater fishes of Europe (exclusive of former USSR), with an introduction for non-systematists and comments on nomenclature and conservation. Biologia, Bratislava, 52/Suppl. 5:1-271. (Ref. 13696)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: kommersiell
Verktyg
Särskilda rapporter
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Internet-källor
Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00692 (0.00329 - 0.01457), b=3.09 (2.92 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
Trofisk nivå (Ref. 69278) |
3.6 ±0.4 se; based on size and trophs of closest relatives |
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Generation time |
1.8 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies. |
Resiliens (Ref. 120179) |
Hög, lägsta populationsfördubblingstid mindre än 15 månader (Preliminary K or Fecundity.). |
Sårbarhet i fisket (Ref. 59153) |
Low vulnerability (23 of 100). 🛈 |