Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
Biển gần đáy. Subtropical; 31°N - 7°N, 103°E - 123°E (Ref. 114953)
Northwest Pacific: Shanghai, China to Cambodia.
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ?  range ? - 32 cm
Max length : 32.0 cm WD con đực/không giới tính; (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 | Sự tái sinh sản | Spawnings | Egg(s) | Fecundities | Ấu trùng
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
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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).
Mức dinh dưỡng (Ref.
69278): 3.7 ±0.5 se; based on size and trophs of closest relatives
Thích nghi nhanh (Ref.
120179): thấp, thời gian nhân đôi của chủng quần tối thiểu là 4.5 - 14 năm (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).