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Myliobatiformes (Stingrays) >
Aetobatidae (Pacific eagle rays)
Etymology: Aetobatus: Greek, aetos = eagle + Greek, batis, batidos = a ray (Raja sp.) (Ref. 45335); narutobiei: Named for its common name in the Japanese waters ‘Naru tobi-ei’ (pronounced ‘Nar-oo-tobee-ay’), Naru’ referring to Naru Island and ‘Tobi-ei’ the Japanese name used for eagle rays which translates to black kite (a bird); noun in apposition.
Eponymy: Though it looks as if it could be an eponym, the binomial combines ‘Naru’ (Naru Island, Japan) with ‘tobi-ei’ – the Japanese name for eagle rays. (Ref. 128868), visit book page.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
marin benthopélagique. Subtropical
Northwest Pacific: eastern Vietnam, Hong Kong, China, Korea and southern Japan.
Taille / Poids / Âge
Maturité: Lm ? range ? - 80 cm
Max length : 100.0 cm WD mâle / non sexé; (Ref. 94821); 150.0 cm WD (female); poids max. publié: 14.4 kg (Ref. 94821); poids max. publié: 14.4 kg
Description synthétique
Clés d'identification | Morphologie | Morphométrie
This medium to large-sized Aetobatus (reaching 150 cm DW) possess the following diagnostic characters: uniformly greenish grey to brownish dorsal surfaces, without pale spots or ocelli; long head, ventral length 27.4-31.9% DW; long to very long rostral lobe (longest in adult males) and narrow, tapering evenly to tip; single row of teeth plates, those in lower jaw chevron-shaped; width of lower tooth plate about 2.4 times its width and in about 18 series; 100-104 pectoral-fin radials (excluding propterygial radials anterior of eyes); 88-90 total vertebral centra (including synarcual); pelvic-fin radials 1 (with 2-5 fused elements) +17-18; males mature by about 80 cm DW; born at 33.4-35.2 cm DW (Ref. 94821).
Body shape (shape guide): other (see remarks); Cross section: flattened.
Found in shallow waters at water temperature above 15-17°C; in winter months, the species leave the shallower bays for nearby sea where water temperature is above 15°C brought by the Kuroshio current-derived warm waters (Ref. 94821).
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
White, W.T., K. Furumitsu and A. Yamaguchi, 2013. A new species of Eagle ray Aetobatus narutobiei from the Northwest Pacific: an example of the critical role taxonomy plays in fisheries and ecological sciences. Plos One 8(12)e83785:1-12. (Ref. 94821)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
Outils
Articles particuliers
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Sources Internet
Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Niveau trophique (Réf.
69278): 3.6 ±0.5 se; based on size and trophs of closest relatives
Vulnérabilité de la pêche (Ref.
59153): Very high vulnerability (83 of 100).
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