Elasmobranchii (haaien en roggen) (sharks and rays) >
Rhinopristiformes (Shovelnose rays) >
Rhinobatidae (Guitarfishes)
Etymology: omanensis: Named for its type locality, Oman.
Environment: milieu / climate zone / depth range / distribution range
Ecologie
marien benthopelagisch. Tropical; 27°N - 22°N, 56°E - 60°E (Ref. 114953)
Western Indian Ocean: Gulf of Oman.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 60.0 cm TL mannelijk / geslacht onbekend; (Ref. 114953)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
This small species has a wedge-shaped disc, is moderately elongate and with a narrow, triangular snout; anterior nasal flaps extending well across internasal space and are barely separated; dorsal surface with dense pattern of white ocelli; disc is rather thin, its length 1.3-1.4 times its width; anterior margins undulate, moderately concave before snout tip; outer corner of pectoral fins broadly rounded; snout angle ca. 64°; large eye, much larger than spiracles, orbit length 3.1-3.7 in preorbital length, 1.1-1.4 in interorbital space; rostral ridges well separated at the base; spiracle with 2 fleshy folds, inner fold rudimentary; rather large nostrils, oblique, length 1.2-1.3 times internasal space, anterior nasal flaps barely separated; velvety skin, entirely covered with minute denticles, no thorns nor thornlets, some barely enlarged denticles on preorbit and in median row between nape and first dorsal fin; tail 1.3-1.4 times longer than disc; tall dorsal fins widely spaced, interspace 2.7-3.2 times base length of first dorsal fin; apices angular to narrowly rounded; pectoral fin radials 67-72; total vertebral centra 185-188 (Ref. 114953).
Apparently a benthic species on inner continental shelf. Unknown life history. Maturity size unknown but a male was found mature at 50 cm TL (Ref. 114953).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Last, P.R., W.T. White, M.R. de Carvalho, B. Séret, M.F.W. Stehmann and G.J.P. Naylor, 2016. Rays of the world. CSIRO Publishing, Comstock Publishing Associates. i-ix + 1-790. (Ref. 114953)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-2)
Gevaar voor de mens
Harmless
Gebruik door de mens
Tools
Speciale rapporten
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Internetbronnen
Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5039 [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).
Trofisch niveau (Ref.
69278): 3.5 ±0.5 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Preliminary low fecundity).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (44 of 100).
