Elasmobranchii (sharks and rays) >
Myliobatiformes (Stingrays) >
Dasyatidae (Stingrays) > Dasyatinae
Etymology: Dasyatis: Greek, dasys = rough, dense (Ref. 45335).
Issue
This species is a junior synonym of Hemitrygon akajei according to CofF (version 31 May 2017).
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal. Temperate
Northwest Pacific: Basargin Cape, Peter the Great Bay and off Askold Island.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 178 cm WD male/unsexed; (Ref. 7445)
Ovoviviparous (Ref. 50449).
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae
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).
Compagno, L.J.V., 1999. Checklist of living elasmobranchs. p. 471-498. In W.C. Hamlett (ed.) Sharks, skates, and rays: the biology of elasmobranch fishes. Johns Hopkins University Press, Maryland. (Ref. 35766)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
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Special reports
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Internet sources
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5002 [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): 3.8 ±0.7 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): Low, minimum population doubling time 4.5 - 14 years (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (78 of 100).
