Animalia > Chordata > Elasmobranchii > Rajiformes > Rajidae > Raja > Raja clavata
 

Raja clavata (Roker; Thornback ray; Maiden ray; Rocker; Skate; Thornback; Thornback maid ray; Thornback rough ray; Thornback skate; Thorny)

Synonyms: Cephaleutherus maculatus; Hieroptera abredonensis; Malacoraja clavata; Raia aspera; Raia rhizacanthus; Raia rubus; Raja aspera; Raja bonaespeiensis; Raja leiobatos; Raja pontica; Raja rubus
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Wikipedia Abstract

The thornback ray (Raja clavata) or thornback skate is a species of fish in the Rajidae family. It is found in coastal waters of Europe and the Atlantic coast of Africa, possibly as far south as Namibia and even South Africa. Its natural habitats are open seas and shallow seas. It is sometimes seen trapped in large estuarine pools at low tide.Etymology: Raja: Latin, raja, -ae = a sting ray .
View Wikipedia Record: Raja clavata

Attributes

Adult Weight [1]  21.83 lbs (9.90 kg)
Female Maturity [1]  10 years
Male Maturity [1]  10 years
Litter Size [1]  142
Maximum Longevity [1]  12 years

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Cardigan Bay/ Bae Ceredigion 236876 Wales, United Kingdom
Carmarthen Bay and Estuaries/ Bae Caerfyrddin ac Aberoedd 163340 Wales, United Kingdom
Fal and Helford 15785 England, United Kingdom    
Glen Creran Woods 1739 Scotland, United Kingdom  
Humber Estuary 90582 England, United Kingdom
Karadagskiy Zapovednik Nature Zapovednik 13876 Ukraine  
Loch Creran 3030 Scotland, United Kingdom  
Loch nam Madadh 5734 Scotland, United Kingdom
Lochs Duich, Long and Alsh Reefs 5883 Scotland, United Kingdom  
Luce Bay and Sands 120487 Scotland, United Kingdom
Lyme Bay and Torbay 77215 England, United Kingdom
Margate and Long Sands 160406 England, United Kingdom
Morecambe Bay 151985 England, United Kingdom
Pembrokeshire Marine/ Sir Benfro Forol 341177 Wales, United Kingdom  
Pen Llyn a`r Sarnau/ Lleyn Peninsula and the Sarnau 360832 Wales, United Kingdom
Plymouth Sound and Estuaries 15820 England, United Kingdom
Sefton Coast 11278 England, United Kingdom
South Wight Maritime 49082 England, United Kingdom
Start Point to Plymouth Sound & Eddystone 84204 England, United Kingdom  
Taynish and Knapdale Woods 2388 Scotland, United Kingdom
Tsitsikamma National Park II 34343 Southern Cape, South Africa  
Waddensea Area Nature Reserve with Management Subsidy IV 600666 Netherlands  
Y Fenai a Bae Conwy/ Menai Strait and Conwy Bay 65440 Wales, United Kingdom  

Prey / Diet

Abra alba (white furrow shell)[2]
Agonus cataphractus (Pogge)[2]
Alloteuthis media (little squid)[2]
Alloteuthis subulata (European Common Squid)[3]
Alpheus glaber (red snapping shrimp)[3]
Ammodytes tobianus (lesser sand eel)[2]
Ampelisca brevicornis[3]
Ampelisca spinipes[3]
Ampelisca unidentata[3]
Aphrodita aculeata (Sea mouse)[2]
Arctozenus risso (Spotted barracudina)[2]
Argentina sphyraena (Lesser silver smelt)[3]
Atelecyclus rotundatus (circular crab)[3]
Athanas nitescens[3]
Bathyporeia pelagica[2]
Belone belone (Garfish)[3]
Buccinum undatum (common whelk)[2]
Buglossidium luteum (Yellow sole)[2]
Calappa granulata (Shame-faced crab)[2]
Callianassa subterranea (mud shrimp)[2]
Callianassa tyrrhena (sand ghost shrimp)[3]
Callionymus lyra (european dragonet)[2]
Calocaris macandreae[2]
Cancer pagurus (Rock crab)[2]
Capros aper (cuckoofish)[2]
Carcinus maenas (green crab)[2]
Cerastoderma edule (Common cockle)[2]
Chlorotocus crassicornis (green shrimp)[3]
Chromis limbata (Damsel fish)[2]
Ciliata mustela (Rockling)[2]
Clupea harengus (Yawling)[2]
Conilera cylindracea[3]
Corystes cassivelaunus (masked crab)[2]
Crangon allmanni[2]
Crangon crangon (common shrimp)[2]
Diastylis bradyi[2]
Echiichthys vipera (Lesser weever)[2]
Eledone cirrhosa (Curled octopus)[3]
Engraulis encrasicolus (Southern African anchovy)[2]
Eunereis longissima (zager)[2]
Eurydice pulchra (gewone pissebed)[3]
Eurynome aspera (strawberry crab)[3]
Fenestraria rhopalophylla (babies toes)[2]
Gadella maraldi (Morid cod)[2]
Galathea dispersa[2]
Galathea intermedia[3]
Gammarellus homari[2]
Gastrosaccus spinifer[2]
Glossanodon leioglossus (Small-toothed argentine)[4]
Goneplax rhomboides (angular crab)[3]
Hippolyte varians[2]
Hippomedon denticulatus[2]
Hyas araneus (Atlantic lyre crab)[2]
Illex coindetii (southern shortfin squid)[3]
Leander serratus[2]
Lepidopus caudatus (Southern frostfish)[2]
Lepidotrigla cavillone (Large-scaled gurnard)[3]
Liocarcinus corrugatus (wrinkled swimming crab)[2]
Liocarcinus depurator (harbour crab)[3]
Liocarcinus holsatus (flying crab)[2]
Liocarcinus marmoreus (marbled swimming crab)[3]
Liocarcinus pusillus (dwarf swimming crab)[2]
Liparis liparis (striped seasnail)[2]
Loligo vulgaris (European Squid)[3]
Lophogaster typicus[3]
Macropipus tuberculatus (portunid crab)[4]
Macropodia rostrata (common spider crab)[2]
Macroramphosus scolopax (Trumpetfish)[2]
Maurolicus muelleri (Silvery lightfish)[2]
Merlangius merlangus (Whiting)[2]
Merluccius merluccius (Herring hake)[3]
Metacarcinus anthonyi (yellow crab)[2]
Micromesistius poutassou (Poutassou)[3]
Mullus surmuletus (Red mullet)[2]
Munida rutlanti[3]
Mytilus edulis (Blue mussel)[2]
Necora puber (velvet crab)[2]
Neocalanus tonsus[2]
Nephrops norvegicus (Norway lobster)[2]
Ophelia limacina (ophélie)[2]
Pagellus bogaraveo (Sea-bream)[2]
Pagurus bernhardus (Bernhard's hermit crab)[3]
Pagurus prideauxi (Brown-legged hermit crab)[4]
Palinurus elephas (common spiny lobster)[2]
Pandalus montagui (Aesop shrimp)[2]
Paracallionymus costatus (Ladder dragonet)[2]
Paromola cuvieri (Crab)[2]
Pasiphaea sivado (white glass shrimp)[3]
Philocheras gorei[2]
Pholis gunnellus (Tissy)[2]
Pleuronectes platessa (European plaice)[2]
Pomatoschistus minutus (freckled goby)[3]
Pontocaris lacazei (hardshell shrimp)[3]
Pontophilus spinosus (spiny lobster)[3]
Praunus inermis[2]
Processa canaliculata (processa shrimp)[3]
Processa edulis (nika shrimp)[3]
Processa hemphilli[2]
Processa macrophthalma[3]
Raja clavata (Roker)[2]
Sabinea septemcarinata (sevenline shrimp)[2]
Sardina pilchardus (European pilchard)[2]
Sardinops sagax (Australian pilchard)[2]
Scaeurgus unicirrhus (Atlantic warty octopus)[2]
Scomber japonicus (Striped mackerel)[2]
Scomber scombrus (Split)[3]
Scyllarus arctus (small european locust lobster)[2]
Sepia australis (southern cuttlefish)[5]
Sepiola atlantica (Atlantic Bobtail)[2]
Solea solea (True sole)[2]
Solenocera membranacea (Atlantic mud shrimp)[3]
Sprattus sprattus (Whitebait)[2]
Sufflogobius bibarbatus (Pelagic goby)[2]
Taurulus bubalis (longspined sea scorpion)[2]
Thia scutellata (thumbnail crab)[3]
Thyrsites atun (snake mackerel)[2]
Trachinus draco (Greater weever)[2]
Trachurus picturatus (Scad)[2]
Trachurus trachurus (Scad)[3]
Trisopterus esmarkii (Norway pout)[2]
Trisopterus luscus (Whiting-pout)[3]
Trisopterus minutus (poor cod)[2]
Upogebia deltaura[2]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Amblyraja radiata (Starry ray)2
Arnoglossus laterna (Scald-fish)2
Balaenoptera acutorostrata (Minke Whale)1
Chelidonichthys capensis (Gurnard)1
Chelidonichthys cuculus (cockoo gurnard)2
Chelidonichthys lastoviza (Streaked gurnard)1
Chelidonichthys lucerna (Sapphirine gurnard)1
Conger conger (Conger)1
Coryphaena hippurus (Mahi-mahi)5
Crangon crangon (common shrimp)1
Ctenolabrus rupestris (Rock cook)1
Delphinus delphis (Short-beaked Saddleback Dolphin)5
Dipturus batis (Blue skate)1
Eledone cirrhosa (Curled octopus)1
Eutrigla gurnardus (Grey gurnard)4
Gadus morhua (rock cod)4
Gobius niger (Black goby)1
Grampus griseus (Risso's Dolphin)2
Hydrobates pelagicus (European Storm-Petrel)1
Lagenorhynchus albirostris (White-beaked Dolphin)3
Lamna nasus (Porbeagle shark)1
Lepidopus caudatus (Southern frostfish)1
Leucoraja naevus (Cuckoo ray)9
Merlangius merlangus (Whiting)1
Merluccius capensis (Cape hake)1
Merluccius merluccius (Herring hake)3
Morus bassanus (Northern Gannet)1
Mustelus mustelus (Sweet William)1
Octopus vulgaris (common octopus)1
Pagellus bogaraveo (Sea-bream)1
Phoca vitulina (Harbor Seal)1
Phocoena phocoena (Harbor Porpoise)1
Pollachius pollachius (Pollock)2
Pollachius virens (Sillock)2
Pomatoschistus microps (Common goby)1
Prionace glauca (Tribon blou)1
Raja montagui (Homelyn ray)18
Raja undulata (Painted ray)4
Scorpaena porcus (Black scorpion fish)1
Scorpaena scrofa (Bigscale scorpionfish)1
Scyliorhinus canicula (Small-spotted catshark)2
Squalus acanthias (Common spiny)1
Thunnus thynnus (horse mackerel)2
Trisopterus capelanus (Poor cod)3
Uranoscopus scaber (Stargazer)1
Uria aalge (Common Murre)1

Predators

Chelidonichthys lucerna (Sapphirine gurnard)[2]
Dipturus batis (Blue skate)[2]
Eutrigla gurnardus (Grey gurnard)[2]
Gadus morhua (rock cod)[2]
Hexanchus griseus (Bluntnose six-gill shark)[2]
Raja clavata (Roker)[2]

Consumers

Parasitized by 
Acanthobothrium benedeni[6]
Acanthobothrium coronatum[6]
Acanthobothrium dujardini <Unverified Name>[6]
Acanthobothrium floridensis[6]
Acanthobothrium ponticum[6]
Acanthocotyle elegans[6]
Acanthocotyle lobianchi[6]
Acanthocotyle oligoterus[6]
Ascaris succisa <Unverified Name>[6]
Calicotyle kroyeri[6]
Christianella minuta <Unverified Name>[6]
Echeneibothrium minimum[6]
Echeneibothrium variabile[6]
Echinobothrium clavatum[6]
Echinobothrium typus[6]
Empruthotrema raiae[6]
Grillotia erinaceus[6]
Gyrodactylus flesi[6]
Gyrodactylus nov <Unverified Name>[6]
Lecithochirium rufoviride[6]
Leptocotyle minor[6]
Micropharynx parasitica <Unverified Name>[6]
Proleptus acutus[6]
Proleptus obtusus <Unverified Name>[6]
Proleptus robustus <Unverified Name>[6]
Pseudanisakis baylisi <Unverified Name>[6]
Pseudanisakis rajae <Unverified Name>[6]
Rajonchocotyle emarginata[6]
Rajonchocotyle prenanti[6]
Rajonchocotyloides emarginata <Unverified Name>[6]

Institutions (Zoos, etc.)

    Maps
Institution Infraspecies / Breed 
Acquario di Genova
Dierenrijk Europa
London Aquarium
Oresundsakvariet (Oresund Aquarium)
Universeum Science Center

Distribution

Eastern Atlantic: Iceland, Norway, North Sea and the western Baltic southward to Morocco and Namibia, including the Mediterranean and the Black Sea. Although reported from southern Africa, its status in the area is uncertain (Ref. 5578).;

Photos

Citations

Attributes / relations provided by 1de Magalhaes, J. P., and Costa, J. (2009) A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology 22(8):1770-1774 2Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics. 3Diet comparison of four ray species (Raja clavata, Raja brachyura, Raja montagui and Leucoraja naevus) caught along the Portuguese continental shelf, Inês Farias, Ivone Figueiredo, Teresa Moura, Leonel Serrano Gordo, Ana Neves and Bárbara Serra-Pereira, Aquat. Living Resour. 19, 105–114 (2006) 4Feeding ecology of demersal elasmobranchs from the shelf and slope off the Balearic Sea (western Mediterranean), MARIA VALLS, ANTONI QUETGLAS, FRANCESC ORDINES and JOAN MORANTA, Scientia Marina 75(4) December 2011, 633-639, Barcelona (Spain) 5CephBase - Cephalopod (Octopus, Squid, Cuttlefish and Nautilus) Database 6Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
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