Elasmobranchii (haaien en roggen) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Dipturus: Greek, di = two + Greek, pteryx = fin (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Ecologie
marien demersaal; diepte 15 - 1310 m (Ref. 26346). Deep-water; 33°S - 43°S, 166°E - 178°W (Ref. 114953)
Southwest Pacific: endemic to New Zealand.
Lengte bij maturiteit / Grootte / Gewicht / Leeftijd
Maturity: Lm 112.0  range ? - ? cm
Max length : 240 cm TL mannelijk / geslacht onbekend; (Ref. 26346); common length : 80.0 cm TL mannelijk / geslacht onbekend; (Ref. 9258); max. gerapporteerde leeftijd: 24 Jaren (Ref. 47618)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Grey with scattered charcoal blotches dorsally, greyish-white ventrally (Ref. 26346).
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).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
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 op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-2)
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: commercieel
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Estimates based on models
Preferred temperature (Ref.
123201): 6.4 - 12.9, mean 8.2 °C (based on 173 cells).
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00224 (0.00133 - 0.00376), b=3.24 (3.10 - 3.38), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 4.1 ±0.6 se; based on size and trophs of closest relatives
Generation time: 11.6 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
Weerstandsvermogen (Ref.
120179): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (80 of 100).