Elasmobranchii (hajar och rockor) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Dipturus: Greek, di = two + Greek, pteryx = fin (Ref. 45335).
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
marina bottenlevande; djupintervall 15 - 1310 m (Ref. 26346). Deep-water; 33°S - 43°S, 166°E - 178°W (Ref. 114953)
Southwest Pacific: endemic to New Zealand.
Längd vid första mognad / Storlek / Vikt / Ålder
Könsmognad: Lm 112.0  range ? - ? cm
Max length : 240 cm TL hane/ej könsbestämd; (Ref. 26346); common length : 80.0 cm TL hane/ej könsbestämd; (Ref. 9258); rapporterad maxålder: 24 år (Ref. 47618)
Kort beskrivning
Bestämningsnycklar | Morfologi | Morfometri
Grey with scattered charcoal blotches dorsally, greyish-white ventrally (Ref. 26346).
Body shape (shape guide): other.
Occurs in coastal waters, continental shelf and upper slope (Ref. 26346). Usually found in deeper waters to 200 m (Ref. 9258). Mainly feeds on benthic decapods and bony fishes (Ref. 114953). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). Males reaches maturity at ca. 150 cm TL. This species is said to be long lived and slow growing (Ref. 114953).
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Young hatch at about 20-23 cm (Ref. 26346).
McEachran, J.D. and K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. (Ref. 27314)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: kommersiell
Verktyg
Särskilda rapporter
Ladda ner XML
Internet-källor
Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00229 (0.00137 - 0.00383), b=3.23 (3.09 - 3.37), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245). |
Trofisk nivå (Ref. 69278) |
4.1 ±0.6 se; based on size and trophs of closest relatives |
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Generation time |
11.6 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies. |
Resiliens (Ref. 120179) |
Låg, lägsta populationsfördubblingstid 4,5-14 år (Fec assumed to be <100). |
Sårbarhet i fisket (Ref. 59153) |
Very high vulnerability (80 of 100). 🛈 |
Priskategori (Ref. 80766) |
Medium.
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