分類 / Names
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: Malacoraja: Greek, malakos = soft + Latin, raja, -ae = ray, fis (Raja sp.) (Ref. 45335).
More on author: Barnard.
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 深海底的; 深度上下限 450 - 1570 m (Ref. 117245). 深水域; 3°C - 5°C (Ref. 117245); 67°N - 38°S, 72°W - 25°E
Eastern Atlantic: Baffin Bay-Davis Strait Offshore to Iceland-Faeroe Ridge, off northwest Africa (Rio de Oro), off southern Namibia and South Africa.
東大西洋: 到冰島-法羅群島的脊，外海的非洲 (里奧德奧羅) 西北部, 外海的那米比亞南部與南非的 Baffin 海灣- 戴維斯海峽外海。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 70.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 4426)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
Very broad, almost pentagonal disc, light above and abruptly dark below; snout bluntly pointed with a flexible tip, eyes small and close together, and a disc with broadly rounded rear margins and tips (Ref. 5578). Small juveniles with and adults without thorns and covered only with small denticles (Ref. 5578). Slate-grey or greyish-brown above except rear margins of pectoral and pelvic fins and claspers of adult males which are dark brown; dark brown below, sometimes with light blotches (Ref. 5578). Lack of large thorns on its disc posterior to the scapular region (Ref. 6902).
非常寬又幾乎五角的體盤, 背面顏色較淡與突然下方顏色較深; 吻頓尖的具有一個柔韌有彈性的頂端, 眼小的而且靠攏在一起, 與一體盤有寬廣圓形的後緣與頂端.(參考文獻 5578) 小的稚魚有而且成魚沒有刺而且僅由小的細齒覆蓋著.(參考文獻 5578) 暗藍灰色或灰褐色的上方除胸鰭的後緣，而且雄性成魚的腹鰭與釦緊物那是深褐色的; 腹面深褐色, 有時有淡的斑塊.(參考文獻 5578) 缺乏大的刺在它的體盤在肩胛區域後面.(參考文獻 6902)
A very rare species inhabiting continental slopes and probably down to the abyssal plains (Ref. 3167). Benthic (Ref. 58426). Adults usually at depths greater than 1,500 m while juveniles are mainly taken from about 450 m downward (Ref. 4426). Minimum depth reported taken from Ref. 4426. Feeds on crustaceans (Ref. 58426). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). This species is occasionally captured as by-catch (Ref. 117245).
一個非常稀有的種居住於大陸斜坡而且可能向下至深海平原.(參考文獻 3167) 底棲的.(參考文獻 58426) 在深度大於成魚通常 1,500 公尺而稚魚主要是取自大約 450 公尺向下的.(參考文獻 4426) 最小深度報告取自參考文獻 4426. 吃甲殼動物。 (參考文獻 58426) 卵生的.(參考文獻 50449) 卵在貝殼上有像觸角一樣的突出。 (參考文獻 205)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Oviparous (Ref. 3167). Paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).東大西洋: 到冰島-法羅群島的脊，外海的非洲 (里奧德奧羅) 西北部, 外海的那米比亞南部與南非的 Baffin 海灣- 戴維斯海峽外海。
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 2024-2)
無危 (LC) ; Date assessed: 20 June 2019
人類使用
漁業: 沒有興趣
工具
特別的報告
下載 XML
網路資源
Estimates based on models
Preferred temperature (Ref.
123201): 3.3 - 8.5, mean 5.9 °C (based on 122 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00141 - 0.00645), b=3.24 (3.07 - 3.41), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.8 ±0.61 se; based on food items.
回復力 (Ref.
120179): 低的, 最小族群倍增時間4.5 - 14 年 (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (48 of 100).
Nutrients (Ref.
124155): Calcium = 9.46 [1.70, 47.25] mg/100g; Iron = 0.362 [0.086, 1.103] mg/100g; Protein = 16.6 [13.7, 19.2] %; Omega3 = 0.61 [0.18, 2.41] g/100g; Selenium = 14.7 [3.9, 48.4] μg/100g; VitaminA = 7.61 [1.88, 30.80] μg/100g; Zinc = 0.341 [0.168, 0.630] mg/100g (wet weight);
