Environment: milieu / climate zone / depth range / distribution range
Ecologia
marino demersale; distribuzione batimetrica 220 - 1100 m (Ref. 114953). Temperate; 42°N - 21°N, 119°E - 146°E (Ref. 114953)
Northwest Pacific: Japan and Taiwan.
Size / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 69.3 cm TL maschio/sesso non determinato; (Ref. 94813)
Inhabits shelf edges to about 1000 m (Ref. 41299). Ovoviviparous (Ref. 50449). Maturity size of males at ca. 68 cm TL; birth size at ca. 20 cm TL (Ref. 114953). Reported to be infrequently captured as by-catch, but of no commercial importance (Ref. 94813).
Life cycle and mating behavior
Maturità | Riproduzione | Deposizione | Uova | Fecundity | 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).
Mould, B., 1994. A world list of rays. The scientific nomenclature and distribution of the recent Batoidea (Batoidea, Elasmobranchii, Chondrichthyes). University of Nottingham, [UK]. 82 p. (Ref. 8630)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
Pesca: di nessun interesse
Strumenti
Special reports
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Fonti Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01479 (0.00665 - 0.03288), b=2.96 (2.77 - 3.15), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 4.2 ±0.6 se; based on size and trophs of closest relatives
Resilienza (Ref.
120179): Molto basso, tempo minimo di raddoppiamento della popolazione più di 14 anni (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (48 of 100).
