Carcharhinus leucas, Bull shark : fisheries, gamefish
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Carcharhinus leucas (Müller & Henle, 1839)

Bull shark
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Image of Carcharhinus leucas (Bull shark)
Carcharhinus leucas
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分類 / Names 共通名の | 類義語 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

板鰓亜鋼(サメとエイ類) (sharks and rays) > Carcharhiniformes (Ground sharks) > Carcharhinidae (Requiem sharks)
Etymology: Carcharhinus: Greek, karcharos = sharpen + Greek, rhinos = nose (Ref. 45335).  More on authors: Müller & Henle.

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

; 海; 新鮮な水; 汽水性の 関連する礁; 両側回遊性 (Ref. 51243); 深さの範囲 1 - 152 m (Ref. 30573), usually 1 - 30 m (Ref. 55183).   Subtropical; 42°N - 39°S, 180°W - 180°E (Ref. 55182)

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Cosmopolitan in tropical and subtropical waters (Ref. 81283): widespread in warm oceans, rivers and lakes (Ref. 4716). Western Atlantic: Massachusetts, USA to Argentina (Ref. 58839); eastern Atlantic: Morocco, Senegal to Angola (Ref. 81283, 81623); Indo-Pacific: Kenya and South Africa to India, then, Viet Nam to Australia; southern Baja California, Mexico to Ecuador and possibly occurring in Peru. Africa: in freshwater found in rivers of West Africa from Gambia River to Ogowe River (Ref. 81283) and in the Cuanza in Angola (Ref. 120641). Sympatric with Carcharhinus amboinensis, Glyphis gangeticus.

Length at first maturity / サイズ / 重さ / 年齢

Maturity: Lm 193.0, range 180 - 230 cm
Max length : 360 cm TL オス/雌雄の選別がない; (Ref. 85726); 400.0 cm TL (female); common length : 260 cm TL オス/雌雄の選別がない; (Ref. 9253); 最大公表体重: 316.5 kg (Ref. 40637); 最大記録サイズ: 32 年 (Ref. 42004)

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. Diagnosis: Carcharhinus leucas is a massive shark with a short, broad and blunt snout, small eyes and triangular saw-edged upper teeth, and lack of interdorsal ridge, characters which are sufficient to distinguish this species (Ref. 26938).

生物学     用語集 (例 epibenthic)

A coastal and freshwater shark inhabiting shallow waters especially in bays, estuaries, rivers, and lakes (Ref. 244). It readily penetrates far up rivers and hypersaline bays and littoral lagoons (Ref. 9997, 44894, 81283). Capable of covering great distances (up to 180 kilometers in 24 hours), moving between fresh and brackish water at random (Ref. 44894). Adults often found near estuaries and freshwater inflows to the sea; young enter rivers and may be found hundreds of km from the sea (Ref. 4967, 44894, 58304). Feeds on bony fishes, other sharks, rays, mantis shrimps, crabs, squid, sea snails, sea urchins, mammalian carrion, sea turtles, and occasionally garbage (Ref. 244, 5578, 44894). Viviparous (Ref. 50449). Gives birth to litters of up to 13 young (Ref. 26938, 44894). Size at birth is 56-81 cm TL (Ref. 81623). Sexual maturity is attained after 10-15 years (at a length between 160-200 centimeters) (Ref. 44894). Though not commercially important, this species is a good food fish (Ref. 12484). Utilized fresh, fresh-frozen or smoked for human consumption, fins for soup, hide for leather, liver for oil, and carcass for fishmeal (Ref. 244). Very hardy and lives well in captivity (Ref. 244). This large shark is potentially dangerous to man (Ref. 81283), probably the most dangerous species of tropical shark (Ref. 244), and it is repeatedly implicated in attacks on humans (Ref. 4967, 44894); attacks in fresh water are rare (Ref. 44894).

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

Viviparpous, with a yolk-sac placenta, 1-13 young in a litter. Size at birth about 60 cm TL (Ref. 9997). In the western North Atlantic off Florida and the Gulf of Mexico, and off South Africa, young are born in late spring or early summer. Off Nicaragua, females may have young throughout the year, with a peak in spring and early summer. Estimated gestation period is 10 to 11 months (Ref. 244). Distinct pairing with embrace (Ref. 205). Females often have courtship scars, but males are rarely seen with fighting scars (Ref. 244).

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

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のレッドリストの状況は (Ref. 120744)

  絶滅危惧に近い (NT) ; Date assessed: 01 October 2005

CITES (Ref. 118484)

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: 代謝; publication : search) | FishSource | 私達の周りの海

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Estimates based on models

Preferred temperature (Ref. 115969): 23.2 - 29, mean 27.5 (based on 2930 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00427 (0.00339 - 0.00537), b=3.07 (3.03 - 3.11), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
栄養段階 (Ref. 69278):  4.3   ±0.5 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 (K=0.04-0.15; tm=6-21; tmax=32; Fec=1-13).
弱み (Ref. 59153):  Very high vulnerability (88 of 100) .
価格帯 (Ref. 80766):   Medium.