Classification / Names
Populärnamn | synonymer | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii (hajar och rockor) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Rajella: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).
Miljö / Klimat / Range
Ekologi
; marina djupbottenlevande; djupintervall 150 - 1170 m (Ref. 5951). Deep-water, preferred 5°C (Ref. 107945); 67°N - 58°N
Northeast Atlantic: Iceland and along rise to Faroes, also Norwegian coasts and Skagerrak. Northwest Atlantic: western Greenland.
Length at first maturity / Size / Vikt / Age
Maturity: Lm ?, range 97 - ? cm
Max length : 123 cm TL hane/ej könsbestämd; (Ref. 40637); publicerad maxvikt: 11.2 kg (Ref. 40637)
Short description
Morfologi | Morfometri
Taggstrålar i ryggfenan (totalt): 0; Taggstrålar i analfenan 0; Mjukstrålar i analfenan: 0. Snout moderately long, its tip pointed and somewhat protruding; upper surface predominantly smooth, only on head and front margins more or less prickly, tail entirely spinulose, underside smooth; up to 4 thorns in front of as well as behind eye, a continuous median row of 42-51 thorns from nape to first dorsal fin (Ref. 3167). Upper surface plain fawn color, slate grey or clay grey, lower surface white, with a grey longitudinal band along tail and grey blotch on either side of cloaca (Ref. 6902).
Occur in moderately deep water but mainly around 250 m in boreal and partly arctic latitudes (Ref. 3167). Benthic (Ref. 58426). Feed on all kinds of bottom animals (Ref. 3167). Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). Eggs are oblong capsules with stiff pointed horns at the corners deposited in sandy or muddy flats (Ref. 205). Egg capsules are 10.7 cm long and 7.7 cm wide (Ref. 41251, 41301).
Life cycle and mating behavior
Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver
Oviparous (Ref. 3167). Paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205).
McEachran, J.D. and K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. (Ref. 27314)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 94142)
Not Evaluated
Threat to humans
Harmless
Human uses
Sportfisk: ja
Ytterligare information
referenserVattenbrukVattenbruksprofilAvelslinjerGenetikAllelfrekvenserÄrftlighetSjukdomarBehandlingMass conversion
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Estimates of some properties based on models
Phylogenetic diversity index (Ref.
82805): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Trofisk nivå (Ref.
69278): 3.6 ±0.50 se; Based on food items.
Resiliens (Ref.
69278): Låg, lägsta populationsfördubblingstid 4,5-14 år (Fec assumed to be <100).
Vulnerability (Ref.
59153): High to very high vulnerability (67 of 100) .
