Carcharias taurus, Sand tiger shark : fisheries, gamefish

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Carcharias taurus Rafinesque, 1810

Sand tiger shark
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Carcharias taurus   AquaMaps   Data sources: GBIF OBIS
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Image of Carcharias taurus (Sand tiger shark)
Carcharias taurus
Picture by Choromanski, J.M.

分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, ) | ITIS | CoL | WoRMS | Cloffa

板鰓亜鋼(サメとエイ類) (sharks and rays) > Lamniformes (Mackerel sharks) > Carchariidae (Ragged-tooth sharks)
Etymology: Carcharias: From the Ancient Greek karkharías, shark, derived from kárkharos, sharp or jagged, referring to a shark’s teeth. (See ETYFish);  taurus: Latin for bull, from Pesce Tauro, local name for this shark in Sicily, Italy, type locality. (See ETYFish).
More on author: Rafinesque.

Environment: milieu / climate zone / depth range / distribution range 生態学

関連する礁; 海洋回遊性 (Ref. 51243); 深さの範囲 1 - 191 m (Ref. 247), usually 15 - 25 m (Ref. 43278). Subtropical; 45°N - 48°S, 100°W - 155°E

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Circumtropical: Except perhaps the eastern Pacific (Ref. 13568). Indo-West Pacific: Red Sea and off the coasts of South Africa to Japan, Korea and Australia (Ref. 13568). Present in Arafura Sea (Ref. 9819). Western Atlantic: Gulf of Maine to Argentina. Old record from Bermuda, south Brazil (Ref. 26938). Eastern Atlantic: Mediterranean to Cameroon. Northwest Atlantic: Canada (Ref. 5951).

Length at first maturity / サイズ / 重さ / 年齢

Maturity: Lm 225.0, range 220 - 230 cm
Max length : 330 cm TL オス/雌雄の選別がない; (Ref. 27549); common length : 250 cm TL オス/雌雄の選別がない; (Ref. 6077); 最大公表体重: 158.8 kg (Ref. 40637)

簡単な記述 形態学 | 形態計測学

背面の脊椎 (合計): 0; 背鰭 (合計): 0; 肛門の骨 0; 臀鰭: 0. A shark with a short, pointed snout, small eyes, protruding spike-like teeth and small, equal-sized dorsal and anal fins; 1st dorsal fin closer to pelvic than to pectoral fins (Ref. 5578). Caudal fin with a pronounced subterminal notch and a short ventral lobe (Ref. 13575). Pale brown or grey, paler below, with dark spots that appear faded in adults; fins plain (Ref. 6586).

生物学     用語集 (例 epibenthic)

A common littoral shark found inshore from the surf zone and in shallow bays to at least 191 m on the outer continental shelves (Ref. 13568). Often on or near the bottom but also occurs in midwater or at the surface (Ref. 247). Only shark known to gulp and store air in its stomach to maintain neutral buoyancy while swimming (Ref. 13568). Found singly or in small to large schools (Ref. 247). Feeds on bony fishes, small sharks, rays, squids, crabs, and lobsters (Ref. 5578). Ovoviviparous, embryos feeding on yolk sac and other ova produced by the mother as well as other siblings in the womb (uterine cannibalism) (Ref. 50449). Usually gives birth to 2 pups after a 9-12 months gestation period (Ref.58048). A migratory species in parts of its range, particularly in its northern and southern extremities where pronounced poleward migration occur in the summer and equatorial movements in autumn and winter (Ref. 247). Usually inoffensive and not aggressive when not provoked (Ref. 247) but has known to bite swimmers and be aggressive towards divers with speared fish (Ref. 6586). Utilized for fresh, frozen, smoked and dried for human consumption (Ref. 247); also for fishmeal, liver oil, fins, and hides for leather (Ref. 13568). Flesh highly appreciated in Japan (Ref. 36731).

Life cycle and mating behavior 成熟 | 繁殖 | 放精 | | 生産力 | 幼生

Exhibit ovoviparity (aplacental viviparity), with embryos feeding on other ova produced by the mother (oophagy) after the yolk sac is absorbed, then cannibalize siblings (adelphophagy) (Ref. 50449). Distinct pairing with embrace (Ref. 205). Eggs leave the ovaries, and while in transit in the oviducts are fertilized and enclosed in groups of 16 to 23 in egg cases. However, at some time between fertilization and birth only two (Ref. 5578, 6586) embryos of its group prevails, possibly by devouring its rivals, and proceeds to eat fertilized eggs and smaller potential siblings in utero until birth. According to Springer (1948) (Ref. 39565), it is evident that this species sends forth into the world not only large, well-developed, and even experienced young but may send them forth with a full stomach. The yolk sac is resorbed at a small size, less than 17 cm, and the umbilical scar may be lost. Gestation period may be from 8 to 9 months long. Size at birth 100 cm (Ref. 6586). Pratt (2001) (Ref. 49562) relates Gordon's (1993) (Ref. 51113) detailed account of the mating behavior of the sand tiger sharks as follows: "mating activities began when the two male C. taurus, having become reluctant to feed, increased their swimming speed, accompanied by clasper flexion and eventual interest in their female tank mates...aggressive displays such as snapping and stalking became frequent, mostly toward species of smaller Carcharhinus in the tank. The males did not become interested in the female until she slowed, moved to the sand area and started cupping her pelvic fins. The two males then became competitive toward each other, circling and tailing, until the alpha male forced the beta male out of the sand area. The female bit the male prior to copulation. She exhibited shielding behavior for several days and then resumed cupping and flaring. The female gradually changed her swimming position and began displaying the submissive behavior. The alpha male swam in increasingly larger circles and began splaying its claspers, then approached the female and exhibited tailing and nosing. Copulation occurred as the male bit into the right flank and trailing edge of the pectoral fin of the female. The male swam side by side with the female, copulating with the right clasper for one to two minutes. After copulation, the male showed little interest in the female." In captivity, males show aggression toward other species after copulation (Ref. 51113, 49562). Females avoid patrolling males by 'shielding' with pelvics close to the substrate (Ref. 51113, 49562). However, female acceptance of future male partner is indicated by a show of 'submissive' body, 'cupping' and 'flaring' of pelvic fins (Ref. 51113, 49562).

主な参考文献 Upload your references | 参考文献 | コーディネーター : Compagno, Leonard J.V. | 協力者

Last, P.R. and J.D. Stevens, 1994. Sharks and rays of Australia. CSIRO, Australia. 513 p. (Ref. 6871)

IUCNのレッドリストの状況は (Ref. 130435)

  絶滅寸前の危機的状況 (CR) (A2bd); Date assessed: 07 December 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Traumatogenic (Ref. 4690)





Human uses

水産業: 商業; ゲームフィッシュ: はい
FAO - 水産業: landings, 種の外形; Publication: search | FishSource | 私達の周りの海

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繁殖
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放精
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インターネットの情報源

Estimates based on models

Preferred temperature (Ref. 123201): 12.5 - 28, mean 24.6 °C (based on 648 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.8125   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00406 - 0.02959), b=3.03 (2.80 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  4.5   ±0.4 se; based on diet studies.
回復力 (Ref. 120179):  非常に低い, 14年以上の倍増期間の最小個体群 (Fec=2; K=0.14-0.17; tmax=17).
Fishing Vulnerability (Ref. 59153):  High vulnerability (58 of 100).
Climate Vulnerability (Ref. 125649):  Moderate vulnerability (38 of 100).
価格帯 (Ref. 80766):   Unknown.
Nutrients (Ref. 124155):  Calcium = 4.12 [0.71, 19.42] mg/100g; Iron = 0.397 [0.092, 1.092] mg/100g; Protein = 21.2 [18.7, 23.6] %; Omega3 = 0.215 [0.084, 0.534] g/100g; Selenium = 20.9 [5.9, 65.0] μg/100g; VitaminA = 20 [7, 64] μg/100g; Zinc = 0.286 [0.136, 0.590] mg/100g (wet weight);