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| Native range | All suitable habitat | Point map | Year 2050 |
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| This map was computer-generated and has not yet been reviewed. |
| Amblyraja radiata AquaMaps Data sources: GBIF OBIS |
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Bilder | Google image
Amblyraja radiata
Bild av Ueberschär, B.
Bilder | Google image
Bild av Ueberschär, B.
Klassificering / Namn Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii (hajar och rockor) (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates)
Etymology: Amblyraja: Greek, amblys = darkness + Latin, raja, -ae = ray (Raja sp.) (Ref. 45335).
Etymology: Amblyraja: Greek, amblys = darkness + Latin, raja, -ae = ray (Raja sp.) (Ref. 45335).
Miljö: miljö / Klimatzon / djupintervall / distributionsområde Ekologi
marina; brackvatten bottenlevande; havsvandrande (Ref. 51243); djupintervall 5 - 1540 m (Ref. 117245), usually 25 - 440 m (Ref. 114953). Boreal; -1°C - 14°C (Ref. 49751); 79°N - 38°N, 95°W - 54°E (Ref. 55275)
Utbredning Territorier | FAO områden | Ekosystem | Förekomster | Prickkarta | Utplanteringar | Faunafri
North Atlantic and adjacent Arctic.
Längd vid första mognad / Storlek / Vikt / Ålder
Könsmognad: Lm 87.5 range ? - ? cm
Max length : 105 cm TL hane/ej könsbestämd; (Ref. 53748); publicerad maxvikt: 11.4 kg (Ref. 53748); rapporterad maxålder: 28 år (Ref. 88929)
Max length : 105 cm TL hane/ej könsbestämd; (Ref. 53748); publicerad maxvikt: 11.4 kg (Ref. 53748); rapporterad maxålder: 28 år (Ref. 88929)
Kort beskrivning Bestämningsnycklar | Morfologi | Morfometri
Taggstrålar i ryggfenan (totalt) : 0; Taggstrålar i analfenan: 0. Adults are rhomboid in shape, young are rounder (Ref. 7251). Short, stiff, bluntly triangular snout; tail shorter than body (Ref. 5578). Upper surface very rough, with solid thornlets scattered all over disc and tail, underside smooth, except for some prickles on snout; a constant pattern of separate orbital thorns, a regular row of 13-17 large thorns from nape to first dorsal fin (Ref. 3167); large, close-set thorns with star-shaped bases at upper disc (Ref. 5578). Coloration highly variable; brownish grey with scattered irregular black blotches dorsally; white ventrally; with darker spots and blotches on tail and pelvic fins; black spot on tip of tail (Ref. 2708).
Body shape (shape guide): other.
Body shape (shape guide): other.
Eurybathic, eurythermic (Ref. 4426) and benthic (Ref. 58426). Cold temperate species found in offshore waters (Ref. 88171) on all kinds of bottoms (Ref. 3167), mainly sandy and muddy (Ref. 82311). In the northeast Atlantic most common between 50-100 m depth (Ref. 88187) at temperatures of 2-5 °C (Ref. 89120). Some seasonal migrations have been reported from the western Atlantic (Ref. 52109, 89121). Migration experiments showed that 85 % of tagged individuals remained within 93 km of the release site, with longest distance travelled at 180 km (Ref. 82319). Feed mainly on fish, crustaceans (Ref. 5951) and polychaete worms (Ref. 5578), but also on hydroids, molluscs, cephalopods and echinoderms (Ref. 49751); known to be a scavenger (Ref. 89122). Diet changes with increasing body size (Ref. 82311). Different populations of starry rays mature at different ages and sizes (Ref. 88171). Oviparous (Ref. 3167). Maturity size varies from 44-90 cm TL. Young hatch at ca. 8-12 cm TL (Ref. 114953). Young may tend to follow large objects, such as their mother (Ref. 205). Rarely reaches 60 cm in the North Sea (Ref. 88187). Able to detect weak electric fields generated by potential prey organisms and may also generate its own weak electric fields (Ref. 10311). Probably taken by hake trawlers (Ref. 5578). Few are dried and salted in Iceland (Ref. 6902). It is a common Skate whose landings are converted to fish-meal (Ref. 117245). It has been mentioned that North American specimens grow to a larger size than East-Atlantic specimens (Arve Lynghammar, pers.comm., 11/09).
Livscykel och parningsbeteende Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Distinct pairing with embrace. Oviparous, laying 10-45 egg cases each year (Ref. 44869, 41305). Eggs are oblong capsules with stiff pointed horns at the corners deposited in sandy or muddy flats (Ref. 205). Egg capsules are 3.4-8.9 cm long and 2.3-6.8 cm wide (Ref. 41250). Paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). In the North Sea, fully formed individuals hatch after 4 months and pups are about 8-11 cm in length (Ref. 44869, 37969). In the Barents Sea, low water temperature may lengthen embryonic development time to 2.5-3 years (Ref. 44869).
Huvudreferens
Ladda upp dina referenser | referenser | Koordinator : McEachran, John | Medarbetare
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)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Sårbar (VU) (A2bcd); Date assessed: 01 July 2019
CITES
Not Evaluated
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: mindre kommeriell; sportfisk: ja
FAO - fiskeri: landningar; Publication: search | FIRMS - Stock assessments | FishSource |
Ytterligare information
Populationsdynamik
Tillväxtparametrar
Max. åldrar / storlekar
Längd-vikt rel.
Längd-längd rel.
Längd-frekvenser
Massakonvertering
Rekrytering
Abundans
Tillväxtparametrar
Max. åldrar / storlekar
Längd-vikt rel.
Längd-längd rel.
Längd-frekvenser
Massakonvertering
Rekrytering
Abundans
Livscykel
Reproduktion
Könsmognad
Mognad/Gills rel.
Fekunditet
Lek
Lekande aggregat
Ägg
Utveckling av ägg
Larver
Larvdynamik
Reproduktion
Könsmognad
Mognad/Gills rel.
Fekunditet
Lek
Lekande aggregat
Ägg
Utveckling av ägg
Larver
Larvdynamik
Fysiologi
Kroppssammansättning
Näringsämnen
Syreförbrukning
Typ av simning
Simhastighet
Visuella pigment
Ljud från fisk
Sjukdomar & Parasiter
Toxicitet (LC50)
Kroppssammansättning
Näringsämnen
Syreförbrukning
Typ av simning
Simhastighet
Visuella pigment
Ljud från fisk
Sjukdomar & Parasiter
Toxicitet (LC50)
Människorelaterad
Vattenbrukssystem
Vattenbruksprofiler
Avelslinjer
Ciguatera-fall
Frimärken, mynt, diverse.
Vattenbrukssystem
Vattenbruksprofiler
Avelslinjer
Ciguatera-fall
Frimärken, mynt, diverse.
Verktyg
E-bok | Fälthandbok | Bestämningsnycklar | Längdfördelnings-verktyg | Livshistorie-verktyg | Prickkarta |
Fångst-MSY |
Särskilda rapporter
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Ladda ner XML
Internet-källor
AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Släkte, Arter | DiscoverLife | ECOTOX | FAO - fiskeri: landningar; Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | Nationella databaser | OceanAdapt | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | Offentliga akvarier | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, sök | World Records Freshwater Fishing | Zoologiskt register
Uppskattningar baserade på modeller
Önskad temperatur (Ref. 123201): -0.8 - 5, mean 1 °C (based on 340 cells).
Index för fylogenetisk mångfald (Ref. 82804): PD50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00324 (0.00279 - 0.00375), b=3.24 (3.20 - 3.28), in cm total length, based on LWR estimates for this species (Ref. 93245).
Trofisk nivå (Ref. 69278): 4.2 ±0.3 se; based on diet studies.
Resiliens (Ref. 120179): Låg, lägsta populationsfördubblingstid 4,5-14 år (K=0.17; tm=4; Fec=13-20).
Prior r = 0.09, 95% CL = 0.06 - 0.13, Based on 1 full stock assessment.
Näringsämnen (Ref. 124155): Calcium = 7.77 [1.30, 39.92] mg/100g; Iron = 0.366 [0.079, 1.119] mg/100g; Protein = 17 [14, 20] %; Omega3 = 0.661 [0.208, 2.577] g/100g; Selenium = 14.9 [3.6, 47.2] μg/100g; VitaminA = 9.24 [1.90, 45.37] μg/100g; Zinc = 0.284 [0.141, 0.547] mg/100g (wet weight);