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Pristiophorus cirratus (Latham, 1794)

Common sawshark
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Pristiophorus cirratus   AquaMaps   Data sources: GBIF OBIS
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Image of Pristiophorus cirratus (Common sawshark)
Pristiophorus cirratus
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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) > Pristiophoriformes (Saw sharks) > Pristiophoridae (Saw sharks)
Etymology: Pristiophorus: Greek, pristis = saw + Greek, pherein = to carry (Ref. 45335).

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

; 海 底生の; 深さの範囲 37 - 310 m (Ref. 6871), usually 37 - 146 m (Ref. 54709).   Subtropical; 20°S - 41°S, 112°E - 150°E (Ref. 54709)

分布 国々 | 国連食糧農業機関の区域 | エコシステム | 事件 | Point map | 導入 | Faunafri

Eastern Indian Ocean: southern Australia (Ref. 6871). Does not occur in the Western Central Pacific (Ref. 31368).

Length at first maturity / サイズ / 重さ / 年齢

Maturity: Lm ?, range 97 - ? cm
Max length : 137 cm TL オス/雌雄の選別がない; (Ref. 247); common length : 125 cm TL オス/雌雄の選別がない; (Ref. 9987); 最大記録サイズ: 15 年 (Ref. 6871)

簡単な記述 形態学 | 形態計測学

Pristiophorus cirratus has a long, narrow, and narrowly tapering rostrum (rostrum length is 27-29% of TL), distance from rostral tip to barbels about equal or slightly greater than distance from barbels to mouth (1:1.2-1.3); distance from rostral barbels to nostrils slightly less or equal to distance from nostrils to 1st to 4th gill slits. About 9-10 large rostral teeth on each side of the rostrum in front of the barbels, 9 behind them; distance from mouth to nostrils 1.3-1.4 times internarial space. Tooth rows 39-49 in upper jaw. Dorsal and pectoral fins covered with denticles in large specimens. Lateral trunk denticles largely unicuspidate. First dorsal fin origin behind free rear tips of pectorals by eye length or more (Ref. 247). P. cirratus has a body pattern of dark blotches (mostly darker bands between pectoral fin bases, over gill slits, between spiracles and below dorsal fins) and spots (occasionally faint). Nostrils, almost circular, are situated about 2/3 way from barbels to corner or mouth, width at nostrils more than 4.5 in preoral snout in adults; preoral snout length more than 2.3 times distance from barbels to snout tip (Ref. 6871). Rostral teeth with dark margins; underside abruptly uniformly white (Ref. 41394). First dorsal fin origin behind free rear tips of pectorals by eye length or more (Ref. 247). Caudal fin almost straight, with slender upper and lower lobes; pectoral well developed but are not ray-like (Ref. 6871).

生物学     用語集 (例 epibenthic)

Found on the continental shelf and upper slope. Forms schools. Feeds on small fishes, including cornet fishes (Fistularia), and crustaceans. Ovoviviparous, with 3-22 young in a litter (48360). Size at birth about 31-34 cm. May live for more than 15 years. Meat marketed fresh and frozen.

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

Ovoviviparous, embryos feed solely on yolk (Ref. 50449). Males mature at about 97 cm, born at about 38 cm (Ref. 6871). Common sawshark lives for more than 15 years. Mature females appear to breed every 1-2 years, carrying from 3-22 young, with about 10 being the average. After 12 months' gestation, the pups are born in shallow coastal areas. They are about 11-14.5 in (27-37 cm) long at birth (Ref. 48640).

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 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)

IUCNのレッドリストの状況は (Ref. 120744)

  軽度懸念 (LC) ; Date assessed: 14 April 2015

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

水産業: 商業
FAO(水産業: 種の外形; publication : search) | FishSource |

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成熟
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形態計測学
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参考文献
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シガテラ(食中毒の名前)
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インターネットの情報源

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Estimates based on models

Preferred temperature (Ref. 115969): 14 - 17.7, mean 15.4 (based on 112 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5156   [Uniqueness, from 0.5 = low to 2.0 = high].
栄養段階 (Ref. 69278):  4.2   ±0.71 se; Based on food items.
回復力 (Ref. 120179):  低い, 4.5年~14年の倍増期間の最小個体群 (tmax=15; Fec=3).
弱み (Ref. 59153):  High vulnerability (60 of 100) .
価格帯 (Ref. 80766):   High.