Ελασμοβράγχιοι (καρχαρίες και σαλάχια) (sharks and rays) >
Rhinopristiformes (Shovelnose rays) >
Rhinobatidae (Guitarfishes)
Etymology: Rhinobatos: Greek, rhinos = nose + Greek, batis, -idos = a ray (Raja sp.) (Ref. 45335).
More on author: Norman.
Environment: milieu / climate zone / depth range / distribution range
Οικολογία
Θαλασσινό(ά) βενθικό(ς); εύρος βάθους 75 - 253 m (Ref. 11228). Deep-water; 2°S - 31°S, 30°E - 43°E (Ref. 114953)
Western Indian Ocean: Kenya to Natal, South Africa.
Μέγεθος / Βάρος / Age
Maturity: Lm ? range ? - ? cm
Max length : 127 cm TL αρσενικό/απροσδιόριστο; (Ref. 3919)
Short description
Μορφολογία | Μορφομετρία
A guitarfish with a narrow, sharply pointed snout and a narrow pectoral disc; nasal flaps extend only to the inner nostril edges (Ref. 5578). Plain olive-green above, without spots; prominent black blotch on underside of snout (Ref. 5578).
A rare and unknown species found offshore on the shelf (Ref. 5578). Ovoviviparous (Ref. 50449). Taken as bycatch of trawl and gillnet fisheries (Ref. 114953).
Life cycle and mating behavior
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref. 50449).
Compagno, L.J.V., 1986. Rhinobatidae. p. 128-131. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref. 3919)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
αλιεία: χωρίς ενδιαφέρον
Περισσότερες πληροφορίες
Age/SizeΑύξησηLength-weightLength-lengthLength-frequenciesΜορφομετρίαΜορφολογίαΠρονύμφεςΔυναμική προνυμφώνΣτρατολόγησηΑφθονίαBRUVS
ΑναφορέςΥδατοκαλλιέργειεςΠροφίλ υδατοκαλλιέργειαςΣτελέχοιΓενετικήElectrophoresesΚληρονομικότηταΑσθένειεςΜεταποίησηNutrientsMass conversion
Εργαλεία
Special reports
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Διαδικτυακές πηγές
Estimates based on models
Preferred temperature (Ref.
123201): 18 - 22.3, mean 19.8 °C (based on 23 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00295 (0.00151 - 0.00578), b=3.13 (2.96 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Τροφικό Επίπεδο (Ref.
69278): 3.8 ±0.4 se; based on size and trophs of closest relatives
Ελαστικότητα (Ref.
120179): Χαμηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού 4,5 - 14 έτη (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (76 of 100).
