Environment: milieu / climate zone / depth range / distribution range
Ecologia
marino demersale. Subtropical; 31°N - 7°N, 103°E - 123°E (Ref. 114953)
Northwest Pacific: Shanghai, China to Cambodia.
Size / Peso / Age
Maturity: Lm ? range ? - 32 cm
Max length : 32.0 cm WD maschio/sesso non determinato; (Ref. 114953)
A poorly known species; attains at least 32 cm DW, mature at this size (Ref. 114953). Ovoviviparous (Ref. 50449).
Life cycle and mating behavior
Maturities | Riproduzione | Spawnings | Egg(s) | Fecundities | Larve
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). Distinct pairing with embrace (Ref. 205).
Nishida, K. and K. Nakaya, 1990. Taxonomy of the genus Dasyatis (Elasmobranchia, Dasyatidae) from the North Pacific. In: Pratt Jr., H. L., S. H. Gruber and T. Taniuchi (eds.): Elasmobranchs as living resources: advances in the biology, ecology, systematics, and the status of the fisheries. NOAA (National Oceanic and Atmospheric Administration) Tech. Rept. NMFS 90:327-346. (Ref. 7445)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Strumenti
Special reports
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Fonti Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00646 (0.00265 - 0.01571), b=3.06 (2.86 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.7 ±0.5 se; based on size and trophs of closest relatives
Resilienza (Ref.
120179): Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
