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Raja clavata Linnaeus, 1758

Thornback ray
إضافة ملاحظاتك Fish Watcher
Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Raja clavata   AquaMaps   Data sources: GBIF OBIS
ارفع صور و مقاطع فيديو
Pictures | Videos | صور قوقل
Image of Raja clavata (Thornback ray)
Raja clavata
Picture by Stergiou, K.I.


Spain country information

Common names: Arraizabala, Bastina rajada, Bramante
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Found in Galicia (Ref. 86578). Recorded from the Balearic Islands (Ref. 26178).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/sp.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Muus, B. and P. Dahlström, 1978
National Database: ICTIMED

Common names from other countries

التصنيف / Names الأسماء الشائعة | مرادفات | Catalog of Fishes(جنس, الانواع) | ITIS | CoL | WoRMS | Cloffa

أشلاق (القروش و الشفانين) (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates)
Etymology: Raja: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).
  More on author: Linnaeus.

Environment: milieu / climate zone / depth range / distribution range البيئة

بحري القاع; نطاق العمق 5 - 1020 m (Ref. 114953).   Subtropical; 70°N - 38°S, 25°W - 50°E

التوزيع دول | مناطق الفاو | النظام البيئي | الظهور | Point map | مقدمة | Faunafri

Eastern Atlantic and Southwest Indian Ocean: Iceland to Madagascar, including the Mediterranean Sea.

Length at first maturity / الحجم / وزن / العمر

Maturity: Lm 76.6, range 47 - 87.5 cm
Max length : 105 cm TL ذكر/ مختلط الجنس; (Ref. 53748); 139.0 cm TL (female); common length : 85.0 cm TL ذكر/ مختلط الجنس; (Ref. 9987); أعلا وزن تم نشرة: 18.0 kg (Ref. 35388); العمر: 15 سنين (Ref. 41305)

وصف مختصر مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي

الأشواك الظهرية (المجموع) : 0; شوكة شرجية: 0. Sub-rhomboid in shape with pointed wing-tips; disc-width 1,25 to 1,36 times in its length, its length 1,70 to 1,83 times in total length. Short rostrum, rounded at his extremity; pectoral fins with clear angles on lateral side; triangular pelvic fins (Ref. 39246). Dorsally prickly; large females also prickly throughout their ventral surface; juveniles and large males prickly along the margins of their discs and the underside of their snout. 30-50 thorns form a median row from the nape to the first dorsal fin; additional large 'buckler' thorns with swollen bases scattered on upper surface of disc in adults (Ref. 3167). Coloration is highly variable, with the dorsal surface having all shades of brown with dark and light spots and blotches; ventral surface white (Ref. 3167, 58137).

أحياء     المصطلحات (على سبيل المثال epibenthic)

Inhabits shelf and upper slope waters. Reported depth ranges varies, from 10-300 m (Ref. 4426, 82319, 88187), and from 300-577 m in the eastern Ionian Sea (Ref. 56504); most common in coastal waters between 10-60 m depth (Ref. 58137). Tolerates low salinities (Ref. 88171). Found on mud, sand and gravel bottoms, rarely on rougher bottoms (Ref. 6808, 58137). Nocturnal species. Feeds on all kinds of bottom animals, preferably crustaceans (Ref. 3167) and fishes (Ref. 114953). Undertakes migrations with mean distances of 54-117 km per month; shows a clear annual migration cycle (Ref. 89017, 89018), moves from deeper offshore waters (10-30 m) in autumn and winter to shallower areas (<10 m) in spring (Ref. 82319). Young are non-migratory, inhabiting inshore nursery grounds (Ref. 89019, 89020, 89022); in the Bay of Douarnenez (France) they are found to remain in shallow waters for at least 2 years (Ref. 89023). Maturity age 7-8 years (Ref. 114953). Oviparous. Young may tend to follow large objects, such as their mother (Ref. 205). Detects weak electric fields generated by other organisms (prey detection and predator avoidance) but may also generate its own weak electric fields (Ref. 10311, 88171). Utilized fresh and frozen (Ref. 9987).

Life cycle and mating behavior Maturities | التكاثر | Spawnings | Egg(s) | Fecundities | Larvae

Oviparous. Distinct pairing with embrace. Polyandrous species (Ref. 89024). Paired eggs are laid and deposited on shallow sand, mud, pebble or gravel bottoms (Ref. 205, 89025). Up to 170 egg cases can be laid by a single female in a year (Ref. 3167), but average fecundity is much lower (around 48-74 eggs) (Ref. 3603, 31302). In northwestern Europe, egg cases are laid during spring (Ref. 3167) and in the Mediterranean during winter and spring (Ref. 3167). Egg cases are oblong capsules with stiff pointed horns at the corners, each containing one embryo (Ref. 205). Capsules are 5.0-9.0 cm long without the horns (Ref. 41250, 88187) and 3.4-6.8 cm wide (Ref. 41250). Egg cases are anchored with an adhesive film (Ref. 82399). Embryos feed solely on yolk (Ref. 50449). Egg cases hatch after about 4-5 months and pups are about 11-13 cm TL (Ref. 88864). Mating season from February to September, peaking in June (Ref. 74501). Adults observed to form same-sex aggregations during the mating season with females moving to shallower inshore waters approximately a month before the males (Ref 3603, 58137, 74501). Mating does not occur in the Baltic Sea (Ref. 82311).

المرجع الرئيسي Upload your references | مراجع | المنظم : McEachran, John | المتعاونين

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. 130435)

  قريب من التهديد بالخطر (NT) ; Date assessed: 03 October 2005

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

خطر للأنسان

  Harmless




استخدامات بشرية

مصائد: تجاري; لعبة سمكه: نعم
FAO(مصائد: الأنتاج; publication : search) | FishSource | البحر حولنا

مزيد من المعلومات

Trophic ecology
عناصر الغذاء
Diet compositions
Food consumptions
Food rations
مفتريسات
Ecology
البيئة
Home ranges
Life cycle
التكاثر
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
Larvae
حركة انتقال اليرقات
Distribution
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Physiology
Body compositions
Nutrients
Oxygen consumptions
نوع السباحة
Swimming speeds
Visual pigment(s)
أصوات الأسماك
Diseases / Parasites
Toxicities (LC50s)
Genetics
جيني
Electrophoreses
Heritabilities
Human related
Aquaculture systems
ملامح تربية الأحياء المائية
سلالات
Ciguatera cases
Stamps, coins, misc.
References
مراجع

أدوات

تقارير خاصة

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مصادر علي الأنترنت

Estimates based on models

Preferred temperature (Ref. 115969): 7.1 - 15.8, mean 10.7 (based on 474 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00200 (0.00175 - 0.00228), b=3.26 (3.23 - 3.29), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
مستوى غذائي (Ref. 69278):  3.8   ±0.2 se; based on diet studies.
المرونه (Ref. 120179):  منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (K=0.09-0.14; tm=10; tmax=23; Fec=150).
Prior r = 0.18, 95% CL = 0.12 - 0.26, Based on 4 full stock assessments.
Fishing Vulnerability (Ref. 59153):  High vulnerability (60 of 100).
Climate Vulnerability (Ref. 125649):  High vulnerability (60 of 100).
فئة السعر (Ref. 80766):   Medium.