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Rostroraja eglanteria (Bosc, 1800)

Clearnose skate
ارفع صور و مقاطع فيديو
Pictures | Sounds | صور قوقل
Image of Rostroraja eglanteria (Clearnose skate)
Rostroraja eglanteria
Picture by Flescher, D.

التصنيف / Names الأسماء الشائعة | مرادفات | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

أشلاق (القروش و الشفانين) (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates) > Rajinae
Etymology: Rostroraja: Latin, rostrum = beak + Latin, raja, -ae = a sting ray (Ref. 45335).

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

; بحري; مياه مخلوطة القاع; محيطية (Ref. 51243); نطاق العمق 0 - 330 m (Ref. 92298), usually 0 - 50 m (Ref. 55280).   Subtropical; 48°N - 22°N, 91°W - 59°W (Ref. 55280)

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

Western Atlantic: Massachusetts to southern Florida (USA) and eastern Gulf of Mexico. Also northern Gulf of Mexico (Ref. 26938).

Length at first maturity / الحجم / وزن / العمر

Maturity: Lm ?, range 49 - 60 cm
Max length : 84.0 cm TL ذكر/ مختلط الجنس; (Ref. 1125)

وصف مختصر الوصف الخارجي | قياسات المظهر الخارجي

Small skate, with irregular darker spots and bars on dorsal surface. Translucent area on each side of mid-dorsal ridge on snout (Ref. 26938). Single row of thorns along the midridge of the back (Ref. 6902). Disk with dark brown bars and streaks and some spots. Front edges nearly straight or slightly concave (Ref. 7251).

أحياء     المصطلحات (على سبيل المثال epibenthic)

Found from saltwater parts of estuaries and bays of 330 m (Ref. 26938). Inhabit inshore areas. Prefer waters of 10°-21°C. Feed mainly on decapod crustaceans, bivalves, polychaetes, squids and fishes (Ref. 3824). Breed while inshore (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 5.1-8.9 cm long and 3.8-5.7 cm wide (Ref. 41249, 41307, 41301, 41358).

Life cycle and mating behavior النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae

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). From the work of Libby and Gilbert (1960) (Ref. 51117) and Luer and Gilbert (1985) (Ref. 38742) male and female clearnose skates mate side by side in an upright position (Ref. 49562). Actual copulation occurs when the male bites the caudal margin of the female's pectoral, bends his tail 75 degrees beneath hers and inserts one clasper, flexed ('splayed') medially 90 degrees, into her oviduct (Ref. 49562). A female displays 'back arching' and 'pectoral fin undulations' as precopulatory behavior to attract males (Ref. 49562).

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. 120744)

  Least Concern (LC) ; Date assessed: 01 December 2008

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

خطر للأنسان


استخدامات بشرية

مصائد: غير مهمة تجارياً; طعم: occasionally
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مزيد من المعلومات

الأسماء الشائعة
علم السميات البيئية
وضع البيض
تجمعات وضع البيض
تطور البيضة
العمر/ الحجم
الطول- الترددات
قياسات المظهر الخارجي
الوصف الخارجي
حركة انتقال اليرقات
الأستزراع المائي
ملف الأستزراع المائي
تواتر الأليل
Mass conversion
Stamps, Coins Misc.
التسمم باكل السمك
نوع السباحة
منطقة الخياشيم
عظمة الأذن


تقارير خاصة

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مصادر علي الأنترنت

Estimates based on models

Preferred temperature (Ref. 115969): 9.6 - 25.7, mean 23.5 (based on 342 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00275 (0.00124 - 0.00609), b=3.25 (3.07 - 3.43), in cm Total Length, based on LWR estimates for this Genus-body shape (Ref. 93245).
مستوى غذائي (Ref. 69278):  3.9   ±0.3 se; Based on diet studies.
Generation time: 5.5 ( na - na) years. Estimated as median LN(3)/K based on 1 growth studies.
المرونه (Ref. 120179):  منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (K=0.20; Fec assumed to be <100).
عرضة للخطر (Ref. 59153):  Moderate to high vulnerability (51 of 100) .
فئة السعر (Ref. 80766):   Medium.