Elasmobranchii (haaien en roggen) (sharks and rays) >
Rajiformes (Skates and rays) >
Rajidae (Skates)
Etymology: Leucoraja: Greek, leykos = white + Latin, raja = a fish, Raja sp. (Ref. 45335).
More on author: Mitchill.
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
marien demersaal; oceanodroom (Ref. 51243); diepte 10 - 914 m (Ref. 106604). Temperate; 52°N - 35°N, 78°W - 52°W
Northwest Atlantic: from northern North Carolina, USA to Gulf of St. Lawrence, Newfoundland and St Pierre Miquelon.
Lengte bij maturiteit / Grootte / Gewicht / Leeftijd
Maturiteit: Lm 37.5, range 32 - 43 cm
Max length : 62.0 cm TL mannelijk / geslacht onbekend; (Ref. 106604); max. gerapporteerde leeftijd: 12 Jaren (Ref. 88929)
Usually on sandy or gravelly bottoms from shoal waters to 90 m depth (Ref. 7251), with temperature range of 1.2-21°C. Benthic (Ref. 5951). Mostly inactive during daylight, but active under dark conditions (Ref. 10807). Feeds on bottom-dwelling organisms such as crabs, shrimps, polychaetes, sea squirts, mollusks, squids and bony fishes (Ref. 27549). Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). Eggs are oblong capsules with stiff pointed horns at the corners deposited in sandy or muddy flats (Ref. 205). Egg capsules are 4.6-6.3 cm long and 2.7-4.8 cm wide, about 10-35 eggs are laid annually (Ref. 41250). Possesses an electric organ located in the tail region (Ref. 10807). Electric organ discharge (EOD) activity is intermittent (Ref. 10011) and seemed more frequent during dark periods (Ref. 10808). The individual EOD of this species is monophasic, head-negative, and lasts 70 ms (Ref. 10011).
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205).
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 2025-2 (Global))
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van minder commercieel belang
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Schattingen op basis van modellen
Fylogenetische diversiteitsindex (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=0.00282 (0.00248 - 0.00320), b=3.22 (3.19 - 3.25), in cm total length, based on LWR estimates for this species (Ref. 93245). |
Trofisch niveau (Ref. 69278) |
3.6 ±0.1 se; based on diet studies. |
Weerstandsvermogen (Ref. 120179) |
laag, minimale populatieverdubbelingstijd 4,5-14 jaar (K=0.29-0.35; tm=4.5; Fec=10; tmax=12). |
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Rate of population increase |
Prior r = 0.09, 95% CL = 0.06 - 0.14, Based on 1 full stock assessment. |
Kwetsbaarheid van de visserij (Ref. 59153) |
Moderate to high vulnerability (50 of 100). 🛈 |
Kwetsbaarheid voor het klimaat (Ref. 125649) |
Very high vulnerability (90 of 100). 🛈 |
Prijsklasse (Ref. 80766) |
Low.
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Voedingsstoffen (Ref. 124155) |
Calcium = 8.66 [1.21, 152.16] mg/100g; Iron = 0.286 [0.027, 3.412] mg/100g; Protein = 15.9 [13.9, 17.9] %; Omega3 = 0.79 [0.34, 1.99] g/100g; Selenium = 11.9 [2.5, 63.8] μg/100g; VitaminA = 6.64 [0.51, 72.57] μg/100g; Zinc = 0.394 [0.028, 4.300] mg/100g (wet weight); |