Environment: milieu / climate zone / depth range / distribution range
Ekologi
; sötvatten bottenlevande. Temperate
Europe: British Isles in Loughs Melvin, Erne, Corrib, and Mask (Ireland), Lochs Awe, Laggan and others (Scotland), apparently also Lakes Ullswater and Bassenthwaite (Cubmria) and Llyns Padarn and Peris (Wales).
Size / Vikt / Age
Maturity: Lm ? range ? - ? cm
Max length : 80.0 cm SL hane/ej könsbestämd; (Ref. 59043); rapporterad maxålder: 23 år (Ref. 59043)
Short description
Morfologi | Morfometri
Distinguished from its congeners in British Isles by its unique body depth about 4.6-5.0 times in SL. Differs further by the combination of the following characters: body brown to silvery, black spots small (equal to or smaller than pupil), few or absent; large size; and maxilla reaching beyond posterior margin of eye (Ref. 59043).
Inhabits large oligotrophic lakes. In Scotland, this species occurs usually in lakes inhabited by Salvelinus species on which it preys. Feeds on fishes and a variety of insects. In Scotland, preys on invertebrates until about 30 cm SL, then becomes piscivorous, feeding mostly on Salvelinus species. Spawns only in the larger and deeper tributaries (Ref. 59043).
Life cycle and mating behavior
Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver
Kottelat, M. and J. Freyhof, 2007. Handbook of European freshwater fishes. Publications Kottelat, Cornol and Freyhof, Berlin. 646 pp. (Ref. 59043)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Ytterligare information
PopulärnamnsynonymerMetabolikPredatorerEkotoxikologiReproduktionKönsmognadLekSpawning aggregationFecundityÄggEgg development
Age/SizeTillväxtLength-weightLength-lengthLength-frequenciesMorfometriMorfologiLarverLarvdynamikRekryteringAbundansBRUVS
referenserVattenbrukVattenbruksprofilAvelslinjerGenetikElectrophoresesÄrftlighetSjukdomarBehandlingNutrientsMass conversion
MedarbetareBilderStamps, Coins Misc.LjudCiguateraHastighetSimsättGälytaOtolithsHjärnstorlekSyn
Verktyg
Special reports
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00488 - 0.02245), b=3.03 (2.86 - 3.20), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 3.8 ±0.58 se; based on food items.
Generation time: 8.4 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
Resiliens (Ref.
120179): Låg, lägsta populationsfördubblingstid 4,5-14 år (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): High vulnerability (59 of 100).
