分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii
板鳃亚纲 (鲨鱼与 鱼) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Pseudotriakidae (False catsharks)
Etymology: Gollum: Named for the antihero of Tolkien’s “Lord of the Rings” trilogy, to which G. attenuatus “bears some resemblance in form and habits”. (See ETYFish); attenuatus: Latin for drawn out or tapered, refer- ring to its “attenuate, almost anguilliform as though emaciated” shape. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
生态学
海洋 深海底的; 深度上下限 120 - 660 m (Ref. 26346), usually 400 - 600 m (Ref. 13566). 深水域; - 46°S
Southwest Pacific: occurs off New Zealand and on rises between New Zealand and the east coast of Australia, New Caledonia, and Fiji just south of the Western Central Pacific. Placement in Proscyllidae provisional, probably will be relocated in Pseudotriakidae.
西南太平洋: 出現外海的紐西蘭與在紐西蘭與澳洲東岸，新加勒多尼亞與斐濟之間的隆起上正好向南方中西太平洋。 放在 Proscyllidae 中暫時的, 可能意志被重新放在 Pseudotriakidae 中。
Length at first maturity / 大小 / 重量 / 年龄
Maturity: Lm ?, range 70 - ? cm
Max length : 107 cm TL 雄鱼/尚未辨别雌雄; (Ref. 6893); 109.2 cm TL (female)
简单描述
检索表 | 型态特徵 | 形态测量图
背棘 (总数) : 0; 臀棘: 0. Caudal fin without a rippled dorsal margin and ventral lobe but with a strong subterminal notch; vertebral axis of caudal fin little raised above body axis (Ref. 13566).
尾鳍没有波浪状的上缘与腹叶但是有一个强的接近端位的凹槽; 尾鳍的椎骨轴在体轴上方稍微向上。 (参考文献 13566)
An uncommon to common deep-water bottom-dwelling shark found on the outermost continental shelf and upper slope of New Zealand and on adjacent seamounts and submarine banks (Ref. 13566). Seems adapted to waters of about 10°C and 34.8 ppt salinity (Ref. 6893). Feeds on a wide variety of fishes, cephalopods, and other invertebrates (Ref. 13566). Probably in schools (Ref. 13566). Females grow slightly larger than males (Ref. 13566). Ovoviviparous, embryos feeding on yolk sac and other ova produced by the mother, uterine milk is consumed additionally (Ref. 50449). Two young are born per litter (Ref. 13566).
一稀有的对发现于最外的大陆棚与纽西兰的上层斜坡的普遍深海底栖鲨鱼而且在毗连的海洋山脊与海底上岸堤.(参考文献 13566) 似乎适应大约 10 °C 与 34.8个 ppt 盐度的水域。 (参考文献 6893) 吃各式各样的鱼，头足类动物与其他的无脊椎动物。 (参考文献 13566) 可能成群.(参考文献 13566) 雌性长的稍微大于雄性。 (参考文献 13566) 卵胎生的, 胚胎吃卵黄囊与其他的卵产生于母亲了, 子宫分泌的乳汁附加地被消费.(参考文献 50449) 二个幼鱼出生每胎。 (参考文獻 13566)
Exhibit ovoviparity (aplacental viviparity), embryos feed on yolk and ova, also consume uterine milk (Ref. 50449). With usually 2 young per litter (Ref. 13566). Fetuses eat unfertilized eggs and store consumed yolk in their yolk sacs (Ref. 13566). Distinct pairing with embrace (Ref. 205).西南太平洋: 出現外海的紐西蘭與在紐西蘭與澳洲東岸，新加勒多尼亞與斐濟之間的隆起上正好向南方中西太平洋。 放在 Proscyllidae 中暫時的, 可能意志被重新放在 Pseudotriakidae 中。
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 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
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Estimates based on models
Preferred temperature (Ref.
123201): 7.9 - 10.1, mean 9.5 °C (based on 24 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.8125 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00209 (0.00112 - 0.00389), b=3.21 (3.04 - 3.38), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
营养阶层 (Ref.
69278): 4.2 ±0.4 se; based on diet studies.
回复力 (Ref.
120179): 非常低的, 最小族群倍增时间超过14 年 (Fec=2).
Fishing Vulnerability (Ref.
59153): High to very high vulnerability (66 of 100).
