Ελασμοβράγχιοι (καρχαρίες και σαλάχια) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Neoraja: Greek, neos = new + Latin, raja = fish, Raja sp. (Ref. 45335).
Eponymy: Dr Matthias F W Stehmann (d: 1943) is a German ichthyologist whose university career at Kiel University (1962–1969) resulted in degrees covering marine sciences, zoology and limnology and culminated with a doctorate in marine sciences. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Οικολογία
Θαλασσινό(ά) βαθύβιο(ς); εύρος βάθους 102 - 1025 m (Ref. 5578). Deep-water; 29°S - 40°S
Southeast Atlantic: off the Orange River mouth to south of the Agulhas Bank, South Africa.
Μέγεθος / Βάρος / Age
Maturity: Lm ? range ? - ? cm
Max length : 37.6 cm TL αρσενικό/απροσδιόριστο; (Ref. 106604)
Short description
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
A dwarf softnose skate with a bluntly pointed snout and very large close-set eyes; tail longer than body in adult; pectoral disc angular with rounded corners, and anterior edges more undulated in adult male than in female; large thorns around eyes, on shoulders, and in interrupted single row from back to dorsal fins (Ref. 5578). Brownish-grey above, with 6-7 crossbars on tail; underside pale with dark brown areas along the front and rear edges of disc, on snout and on underside of tail (Ref. 5578).
Found on the upper slope (Ref. 5578). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). Probably taken by hake trawlers (Ref. 5578).
Life cycle and mating behavior
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).
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: Version 2024-1)
Threat to humans
Harmless
Human uses
Εργαλεία
Special reports
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Διαδικτυακές πηγές
Estimates based on models
Preferred temperature (Ref.
123201): 6.1 - 12.1, mean 10.8 °C (based on 9 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00646 (0.00364 - 0.01145), b=3.29 (3.14 - 3.44), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Τροφικό Επίπεδο (Ref.
69278): 3.7 ±0.6 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): Low to moderate vulnerability (28 of 100).
