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) >
Squaliformes (Sleeper and dogfish sharks) >
Somniosidae (Sleeper sharks)
Etymology: Scymnodon: scymnus, an ancient name for some kind of shark, derived from a Greek word meaning young animal, cub or whelp; odon (Gr.), tooth, referring to large, triangular cutting teeth on lower jaw of S. ringens (See ETYFish); macracanthus: macro-, from makros (Gr.), long or large; acanthus (L.), from akantha (Gr.), thorn, referring to stout, prominent dorsal-fin spines (See ETYFish).
More on author: Regan.
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 深海底的; 深度上下限 219 - 1550 m (Ref. 6871), usually 550 - 732 m (Ref. 247). 深水域; 50°S - 54°S
Indo-Pacific: southern distribution, discontinuous across Pacific and Indian Oceans.
東南太平洋: 麥哲倫海峽。 西南太平洋: 紐西蘭.(參考文獻 26346) 西南大西洋: 阿根廷.(參考文獻 58839)
Length at first maturity / 大小 / 重量 / 年齡
Maturity: Lm 149.5, range 129 - 170 cm
Max length : 131 cm TL 雄魚/尚未辨別雌雄; (Ref. 247); 170.0 cm TL (female)
背棘 (總數) : 2; 臀棘: 0. Dark brown or blackish in color, dorsal fins with fairly prominent fin spines, moderately long snout, lanceolate upper teeth and bladelike lower teeth with short, oblique cusps, stocky body that tapers abruptly from pectoral region, and moderately large tricuspidate and tricarinate lateral trunk denticles (Ref. 247).
深褐色或黑色的顏色, 背鰭具有非常突出的鰭棘, 中等長度的吻又矛尖形的上顎齒與刀葉狀的下顎齒有短的, 斜的尖頭，從胸的區域突然變細的矮胖的身體, 與普通大的三尖與 tricarinate 側部軀幹細齒.(參考文獻 247)
A rare species inhabiting lower continental slopes (Ref. 26346), also on insular slopes in large schools near the bottom which are segregated according to size and sex, and feeds on cephalopods and bony fishes (Ref. 247). Up to 36 young in a litter, ths size at birth between 32 and 36 cm (Ref. 247). Used for fishmeal and liver oil (Ref. 6871). Minimum depth from Ref. 247. Ovoviviparous (Ref. 205).
一個稀有的種居住於大陸坡下層.(參考文獻 26346) 卵胎生的.(參考文獻 205)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Ovoviviparous (Ref. 26346). Distinct pairing with embrace (Ref. 205).東南太平洋: 麥哲倫海峽。 西南太平洋: 紐西蘭.(參考文獻 26346) 西南大西洋: 阿根廷.(參考文獻 58839)
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
人類使用
漁業: 沒有興趣
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5313 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00220 - 0.00627), b=3.12 (2.98 - 3.26), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
營養階層 (Ref.
69278): 4.5 ±0.59 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).
