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) >
Carcharhiniformes (Ground sharks)
真鯊目 (Ground sharks) >
Pseudotriakidae (False catsharks)
擬貓鮫科 (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).
Eponymy: The genus and these species are named after the fictional character, Gollum, in J R R Tolkien’s The Hobbit and Lord of the Rings. [...] (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 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 / 年齡
Maturity: Lm ?, range 70 - ? cm
Max length : 107 cm TL 雄魚/尚未辨別雌雄; (Ref. 6893); 109.2 cm TL (female)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 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).
尾鰭沒有波浪狀的上緣與腹葉但是有一個強的接近端位的凹槽; 尾鰭的椎骨軸在體軸上方稍微向上。 (參考文獻 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).
一稀有的到被發現於最外的大陸棚與紐西蘭的上層斜坡而且在毗連的海洋山脊與海底上岸堤的普遍深海底棲鯊魚.(參考文獻 13566) 似乎適應大約 10個 ° C 與 34.8個 ppt 鹽度的水域。 (參考文獻 6893) 吃各式各樣的魚，頭足類動物與其他的無脊椎動物。 (參考文獻 13566) 可能成群.(參考文獻 13566) 雌性長的稍微大於雄性。 (參考文獻 13566) 卵胎生的, 胚胎吃卵黃囊與其他的卵被產生於母親, 子宮分泌的乳汁被附加地消費。 (參考文獻 50449) 二個幼魚出生每胎。 (參考文獻 13566)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
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)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
無危 (LC) ; Date assessed: 21 June 2017
人類使用
漁業: 沒有興趣
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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).
營養階層 (Ref.
69278): 4.2 ±0.4 se; based on diet studies.
回復力 (Ref.
120179): 非常低的, 最小族群倍增時間超過14 年 (Fec=2).
Fishing Vulnerability (Ref.
59153): High to very high vulnerability (66 of 100).
