Elasmobranchii (hajar och rockor) (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.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
marina bottenlevande; havsvandrande (Ref. 51243); djupintervall 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.
Längd vid första mognad / Storlek / Vikt / Ålder
Könsmognad: Lm 37.5, range 32 - 43 cm
Max length : 62.0 cm TL hane/ej könsbestämd; (Ref. 106604); rapporterad maxålder: 12 år (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 på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: mindre kommeriell
Verktyg
Särskilda rapporter
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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=0.00282 (0.00248 - 0.00320), b=3.22 (3.19 - 3.25), in cm total length, based on LWR estimates for this species (Ref. 93245). |
Trofisk nivå (Ref. 69278) |
3.6 ±0.1 se; based on diet studies. |
Resiliens (Ref. 120179) |
Låg, lägsta populationsfördubblingstid 4,5-14 år (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. |
Sårbarhet i fisket (Ref. 59153) |
Moderate to high vulnerability (50 of 100). 🛈 |
Sårbarhet för klimatet (Ref. 125649) |
Very high vulnerability (90 of 100). 🛈 |
Priskategori (Ref. 80766) |
Low.
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Näringsämnen (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); |