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)
角鯊目 (Sleeper and dogfish sharks) >
Dalatiidae (Sleeper sharks)
鎧鯊科 (Sleeper sharks)
Etymology: Isistius: Etymology not explained, probably iso-, from isos (Gr.), equal; istius, from histion (Gr.), sail (i.e., dorsal fin), referring to its two similarly shaped and sized (and posterior) dorsal fins, a character Gill used to diagnose genus. José I. Castro, The Sharks of North America (Oxford University Press, 2011), suggests name may allude to the Egyptian goddess Isis, represented in statuary with her head veiled, or to the dark collar encircling throat of I. brasiliensis, “which could also suggest a veil over the head” (p. 145). This interpretation is rejected by the fact that Gill often used “istius” in the names of several genera distinguished (at least in part) by their dorsal fins (Acanthistius, Brachyistius, Caristius, Dichistius, Goniistius, Iniistius, Micromesistius, Nematistius). (See ETYFish); plutodus: ploutos (Gr.), wealth or abundance; odon (Gr.), tooth, referring to larger size of lower jaw teeth compared with congeners. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋; 深度上下限 60 - 200 m (Ref. 52580). 亞熱帶的; 44°N - 33°S (Ref. 52580)
Atlantic: off Alabama, USA and the Gulf of Mexico; including Brazil and West Sahara and off Azores. Northwest Pacific: off Okinawa, Japan and Australia (NSW). A very rare species (Ref. 52580).
西大西洋: 外海的美國阿拉巴馬州與墨西哥灣; 包括巴西。 西北太平洋: 外海的日本琉球。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 42.3 cm TL (female)
背棘 (總數): 0; 背的軟條 (總數): 0. The largetooth cookiecutter shark Isistius plutodus has no collar marking around throat, a small asymmetrical caudal fin with a short ventral lobe less than half the length of dorsal caudal margin, bigger mouth and gigantic lower teeth (proportionately the largest in any living shark) in 19 rows (upper teeth = 29 rows). Eyes set well forward on head, with extensive anterior binocular field. Pectoral fins rounded, pelvic fins smaller than dorsal fins.
As with the other member of the genus Isistius, it has a characteristic small cigar-shaped body with two small close-set spineless dorsal fins far posterior on back, no anal fin, huge, triangular-cusped teeth without blades, short, bulbous snout and a unique suctorial lips (Ref. 247).
大齒的雪茄鯊 大齒達摩鯊〔Isistius plutodus〕 咽喉的周圍沒有環紋, 一小的不對稱的在 19 列中尾鰭有一個短的腹葉少於一半的後背側緣的長度, 較大的嘴與巨人般的下顎齒 (比例上在任何的活鯊魚中最大的).(上顎齒 =29 列) 眼睛位於在頭部上相當向前, 藉由廣闊的前方雙眼的視野。 胸鰭圓的, 比背鰭小的腹鰭。
與本屬 Isistius 的另一個成員相較, 它有一個特殊的小雪茄-形狀的身體有二小的靠攏在一起無棘的背鰭在背上極後端又沒有臀鰭, 極大的﹐三角形沒有葉片的尖牙﹐和短又凸起的吻與一個獨特的吸吮式嘴唇.(參考文獻 247)
A very rare species known only from few localities in epipelagic waters. Apparently feeds on small epibenthic and epipelagic invertebrates and fish. Its powerful jaws, big mouth and enormous lower teeth enable it to bite off large portion of its prey in one sweeping motion. A facultative ectoparasite evidenced by its suctorial lips and feeding apparatus. It has extremely short snout and anteriorly positioned eyes which allows for binocular vision (Ref. 247). Caught by mid-water trawl (Ref. 55584). Ovoviviparous (Ref. 205). Has large oily liver which helps it to become neutrally buoyant (`hepatic float').
發現於深水域了。 卵胎生的.(參考文獻 205) 有幫助它變成中立有浮力的大的多油肝臟。 (肝臟的漂流物') 它的有力顎, 大的嘴與巨大的下顎齒使它能夠在一個襲擊行動中咬下它的獵物的大部分。 一個官能性體外寄生動物證據為它的吸吮式嘴唇與進食器官了。 它有非常短的吻與眼睛向前那一個考慮到雙眼的視野。
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Distinct pairing with embrace (Ref. 205).西大西洋: 外海的美國阿拉巴馬州與墨西哥灣; 包括巴西。 西北太平洋: 外海的日本琉球。
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)
人類使用
漁業: 沒有興趣
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參考文獻養殖養殖資訊品種遺傳學Electrophoreses遺傳率疾病加工NutrientsMass conversion
合作者照片Stamps, Coins Misc.聲音神經毒速度泳型鰓區Otoliths腦重體重比眼睛色素
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Estimates based on models
Preferred temperature (Ref.
123201): 14.1 - 25.1, mean 18.8 °C (based on 225 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7520 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00141 - 0.00976), b=3.12 (2.89 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 4.2 ±0.4 se; based on size and trophs of closest relatives
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): Low to moderate vulnerability (32 of 100).
