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: Dipturus: Greek, di = two + Greek, pteryx = fin (Ref. 45335).
Eponymy: Stewart ‘Stew’ Springer (1906–1991) was a field naturalist who dropped out of Butler College (1929) but was awarded a baccalaureate by George Washington University (1964), by which time he was world-renowned as an expert on both the taxonomy and [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 深海底的; 深度上下限 88 - 740 m (Ref. 11284), usually 400 - 500 m (Ref. 5578). 深水域; 21°N - 37°S, 11°E - 77°E (Ref. 114953)
Southeast Atlantic and Western Indian Ocean: in scattered localities from Lüderitz, Namibia round the Cape (South Africa) to central Mozambique; also off Madagascar and Kenya; also found off India and Oman (Ref. 114953).
東南大西洋與西印度洋: 分佈離散從那米比亞的盧德里茲沿著海岬 (南非) 到莫三比克中部; 也外海的馬達加斯加與肯亞。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 192 cm TL 雄魚/尚未辨別雌雄; (Ref. 114953)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
An all-dark longnose skate with its underside uniformly roughened by small denticles; snout acutely pointed and greatly elongated, and tail moderately stout and not conspicuously swollen; pectoral disc angular and broader than in other longnose skates in the area; no nape thorn (Ref. 5578). Dark grey to blackish above and below, ventral mucous pores black (Ref. 5578).
一個全身黑色的長鼻魟魚它的下面均勻地由於小的細齒而顯得粗糙了; 吻尖銳的而且非常延長, 與尾部中等短胖的而不是明顯地肥大; 胸盤有角而較寬的超過在區域中的其他長鼻的魟魚中; 沒有後頸刺.(參考文獻 5578) 深灰色的對黑色的上面與下面, 腹面黏液孔黑色.(參考文獻 5578)
Inhabits the outer shelf and upper slope (Ref. 5578). Rarely caught, probably inhabits hard bottoms that are seldom trawled (Ref. 114953). Feeds on bony fish, crabs and squid (Ref. 5578, Ref. 114953). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). Males reaches maturity at 125-135 cm TL, females at 170-190 cm TL. Smallest known specimen at 27 cm TL (Ref. 114953) Probably caught by hake trawlers (Ref. 5578).
棲息於外部的大陸棚與上層斜坡。 (參考文獻 5578) 吃硬骨魚，螃蟹與烏賊。 (參考文獻 5578) 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) 可能被鱈魚底拖網捕獲了。 (參考文獻 5578)
Life cycle and mating behavior
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). Eggs have horn-like projections on the shell (Ref. 205).東南大西洋與西印度洋: 分佈離散從那米比亞的盧德里茲沿著海岬 (南非) 到莫三比克中部; 也外海的馬達加斯加與肯亞。
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: 24 April 2018
人類使用
漁業: 沒有興趣
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Estimates based on models
Preferred temperature (Ref.
123201): 6.4 - 12.5, mean 10.4 °C (based on 32 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00275 (0.00175 - 0.00433), b=3.20 (3.07 - 3.33), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
營養階層 (Ref.
69278): 4.3 ±0.69 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): Very high vulnerability (90 of 100).
