Rajella fyllae  (Lütken, 1887)

Round ray
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Rajella fyllae   AquaMaps   Data sources: GBIF OBIS
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Image of Rajella fyllae (Round ray)
Rajella fyllae
Picture by Byrkjedal, I.

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 170 - 2050 m (Ref. 3167), usually 300 - 800 m (Ref. 3167).   Deep-water; 1°C - 7°C (Ref. 3167), preferred ?; 80°N - 45°N, 77°W - 37°E

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

Northeast Atlantic: Spitsbergen [=Svalbard] to southern Norway, southern Greenland, Iceland, Faeroe Islands to Shetlands, western coasts of British Isles and Bay of Biscay. Northwest Atlantic: Greenland to Nova Scotia, Canada.

Size / Vikt / Age

Maturity: Lm ?  range ? - ? cm
Max length : 60.0 cm TL hane/ej könsbestämd; (Ref. 35388)

Short description Morfologi | Morfometri

Snout is short and obtuse. Midbelt of its disc and upper surface of its tail are rough with large thorns in irregular rows. Upper surface ash gray to chocolate brown. Lower surface white, grayish white, pale gray or light fawn color, sooty patches on pelvic fins and axils of pectoral fins (Ref. 6902).

Biologi     Ordlista (t.ex. epibenthic)

Found in deeper shelf and slope waters, in 3-5.5°C water temperature (6902). Benthic (Ref. 58426). Feed on all kinds of bottom animals with preference for invertebrates (Ref. 3167) like copepods, amphipods and mysids (Ref. 6902). 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 3.8-4.2 cm long and 2.4-2.6 cm wide (Ref. 41303, 41251, 41301).

Life cycle and mating behavior Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver

Oviparous, 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).

Main reference Upload your references | 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)

IUCN Red List Status (Ref. 109396)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fiskeri: saknar intresse
FAO(Publication : search) | FisheriesWiki | Sea Around Us

Ytterligare information

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Ekosystem
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synonymer
Metabolik
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Reproduktion
Könsmognad
Lek
Fecundity
Ägg
Egg development
Age/Size
Tillväxt
Length-weight
Length-length
Length-frequencies
Morfometri
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Internet-källor

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, sök) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00309 (0.00138 - 0.00693), b=3.20 (3.02 - 3.38), based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisk nivå (Ref. 69278):  3.4   ±0.2 se; Based on diet studies.
Resiliens (Ref. 69278):  Låg, lägsta populationsfördubblingstid 4,5-14 år (Fec assumed to be <100).
Vulnerability (Ref. 59153):  Moderate to high vulnerability (47 of 100) .