Rostroraja eglanteria, Clearnose skate : fisheries, bait

Rostroraja eglanteria (Bosc, 1800)

Clearnose skate
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Rostroraja eglanteria
Photo von Flescher, D.

Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (Haie und Rochen) (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates)
Etymology: Rostroraja: Latin, rostrum = beak + Latin, raja, -ae = a sting ray (Ref. 45335).

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

seewasser; brackwasser demersal; ozeanodrom (Ref. 51243); tiefenbereich 0 - 330 m (Ref. 92298), usually 0 - 50 m (Ref. 55280). Subtropical; 48°N - 22°N, 91°W - 59°W (Ref. 55280)

Verbreitung Territorien | FAO Gebiete | Ökosysteme | Vorkommen | Punkt Karte | Einführungen | Faunafri

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

Länge bei der ersten Reifung / Größe / Gewicht / Alter

Geschlechtsreife: Lm 53.5, range 49 - 60 cm
Max length : 84.0 cm TL Männchen/unbestimmt; (Ref. 1125)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

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).
Body shape (shape guide): other.

Biologie     Fachlexikon (Englisch) (z.B. 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).

Lebenszyklus und Paarungsverhalten Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven

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).

Hauptreferenz Laden Sie Ihre Referenzen hoch | Referenzen | Koordinator : McEachran, John | Partner

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 Rote Liste Status (Ref. 130435: Version 2025-2 (Global))

  nicht bedroht (LC) ; Date assessed: 20 June 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

Fischereien: weniger kommerziell; Köder: occasionally
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Schätzungen auf der Grundlage von Modellen

Phylogenetischer Diversitätsindex
(Ref. 82804)
PD50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00162 (0.00103 - 0.00256), b=3.27 (3.14 - 3.40), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophische Ebene
(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.
Widerstandsfähigkeit
(Ref. 120179)
niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (K=0.20; Fec assumed to be <100).
Rate of population increase Prior r = 0.07, 95% CL = 0.04 - 0.10, Based on 1 full stock assessment.
Anfälligkeit der Fischerei
(Ref. 59153)
Moderate to high vulnerability (51 of 100). 🛈
Preiskategorie
(Ref. 80766)
Medium.