分類 / 名稱
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii
板鰓亞綱 (鯊魚與魟魚) (sharks and rays) >
Rajiformes (Skates and rays)
鰩目 (Skates and rays) >
Rajidae (Skates)
鰩科 (Skates)
Etymology: Leucoraja: Greek, leykos = white + Latin, raja = a fish, Raja sp. (Ref. 45335).
More on author: Mitchill.
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
海洋 居於水底的; 海洋洄游的 (Ref. 51243); 深度上下限 10 - 914 m (Ref. 106604). 溫帶; 49°N - 33°N, 78°W - 59°W (Ref. 55277)
Western Atlantic: southern Gulf of St. Lawrence and Nova Scotia in Canada to North Carolina, USA.
西大西洋: 聖勞倫斯灣南部與加拿大的新斯科舍省到美國北卡羅萊那州。
初熟時的長度 / 大小 / 重量 / 年齡
成熟度: Lm 37.5, range 32 - 43 cm
Max length : 62.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 106604); 最大年齡: 12 年 (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).
通常在從淺的水域到 90 公尺深 (參考文獻 7251) 的沙或多碎石的底部上, 藉由 1.2-21個 ° C. 的溫差 底棲的.(參考文獻 5951) 大部份不活躍白天時, 但是活躍的在深色的情況.(參考文獻 10807) 卵生的。 明顯的成對出現。 幼魚可能傾向跟隨大的個體, 例如他們的母親.(參考文獻 205) 卵為長方形鞘囊具有僵硬的觸角沈積在沙灘或泥灘的角落.(參考文獻 205) 卵鞘是 4.6-6.3 公分長與 2.7-4.8 公分寬的, 大約 10-35個卵生產每年.(參考文獻 41250) 持有一個發電器位於.尾部.(參考文獻 10807) 發電器放電 (EOD) 活動是間歇的 (參考文獻 10011) 而且在黑暗的時候似乎更頻繁.(參考文獻 10808) 這種的個別 EOD 是單相的﹐帶負電的, 而且持續 70 ms 。 (參考文獻 10011)
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
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).西大西洋: 聖勞倫斯灣南部與加拿大的新斯科舍省到美國北卡羅萊那州。
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)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
無危 (LC) ; Date assessed: 19 July 2019
人類使用
漁業: 低經濟
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基於模型的估計
首選溫度 (參考文獻
123201): 3.3 - 11.9, mean 6.8 °C (based on 97 cells).
系統發育多樣性指數 (參考文獻
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00282 (0.00249 - 0.00320), b=3.22 (3.19 - 3.25), in cm total length, based on LWR estimates for this species (Ref.
93245).
營養階層 (參考文獻
69278): 3.6 ±0.1 se; based on diet studies.
回復力 (參考文獻
120179): 低的, 最小族群倍增時間4.5 - 14 年 (K=0.29-0.35; tm=4.5; Fec=10; tmax=12).
Prior r = 0.09, 95% CL = 0.06 - 0.14, Based on 1 full stock assessment.
釣魚的脆弱性 (Ref.
59153): Moderate to high vulnerability (50 of 100).
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氣候脆弱性 (Ref.
125649): Very high vulnerability (90 of 100).
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營養素 (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);
