Common names from other countries
Elasmobranchii (hajar och rockor) (sharks and rays) >
Myliobatiformes (Stingrays) >
Gymnuridae (Butterfly rays)
Etymology: Gymnura: Greek, gymnos = naked + Greek, oura = tail (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Ekologi
marina bottenlevande; djupintervall 1 - 94 m (Ref. 96339). Subtropical; 44°N -
Eastern Pacific: California, USA to Peru.
Size / Vikt / Age
Maturity: Lm ?  range ? - ? cm
Max length : 100.0 cm TL hane/ej könsbestämd; (Ref. 9255); common length : 95.0 cm WD hane/ej könsbestämd; (Ref. 1468)
Inhabits warm-temperate to tropical shallow bays and beaches (Ref. 2850). Feeds on crustaceans and small fishes (Ref. 37955). Ovoviviparous (Ref. 50449). Has a small venom apparatus which has limited use as a defense organ (Ref. 37955). Maximum length reported to reach 150 cm (Ref. 37955).
Life cycle and mating behavior
Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver
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)
CITES (Ref. 128078)
Not Evaluated
Human uses
Fiskeri: mindre kommeriell
Verktyg
Special reports
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Estimates based on models
Preferred temperature (Ref.
115969): 17.7 - 28.8, mean 23.4 (based on 100 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00352 - 0.01710), b=3.09 (2.89 - 3.29), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 4.0 ±0.65 se; based on food items.
Resiliens (Ref.
120179): Mycket låg, lägsta populationsfördubblingstid mer än 14 år (Fec assumed to be <10).
Fishing Vulnerability (Ref.
59153): High vulnerability (60 of 100).