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) >
Pristiophoriformes (Saw sharks)
鋸鯊目 (Saw sharks) >
Pristiophoridae (Saw sharks)
鋸鯊科 (Saw sharks)
Etymology: Pristiophorus: pristio-, presumably derived from prio (Gr.), to saw, but treated here as a noun (a saw); phorus, from phoreus (Gr.), bearer or carrier, referring to saw-like snout (note also that pristis is Greek for sawfish). (See ETYFish); cirratus: Latin for curly or fringed, referring to long, string-like ventral barbels. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 居於水底的; 深度上下限 37 - 310 m (Ref. 6871), usually 37 - 146 m (Ref. 54709). 亞熱帶的; 28°S - 45°S, 113°E - 154°E (Ref. 54709)
Eastern Indian Ocean: southern Australia (Ref. 6871). Does not occur in the Western Central Pacific (Ref. 31368).
東印度洋: 澳洲南部.(參考文獻 6871) 不會出現在中西太平洋.(參考文獻 31368)
Length at first maturity / 大小 / 重量 / 年齡
Maturity: Lm ?, range 97 - ? cm
Max length : 137 cm TL 雄魚/尚未辨別雌雄; (Ref. 247); common length : 125 cm TL 雄魚/尚未辨別雌雄; (Ref. 9987); 最大年齡: 15 年 (Ref. 6871)
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).
長吻鋸鯊〔Pristiophorus cirratus〕 有一個長的﹐狹窄的﹐與狹窄尖端細的喙 (喙長度是 27-29% 的 TL) ，從嘴的頂端到觸鬚的距離大約相等或些微大於從觸鬚到嘴 (1:1.2-1.3) 的距離; 從嘴的觸鬚到鼻孔的距離些微比較少的或等於從到第一的鼻孔到第 4個鰓縫的距離。 大約 9-10 大的嘴在觸鬚之前牙齒在喙的兩邊,9個在後他們; 距離從嘴巴到鼻孔 1.3-1.4 倍於鼻孔間隙。 在上頜中的齒列 39-49。 背部的與胸鰭在大的個體中覆蓋著細齒了。 側面的軀幹細齒相當單尖端。 第一背鰭起點在眼徑或更多的胸鰭的鰭游離後端後面。 (參考文獻 247)
P. cirratus 有一個黑色斑點的體色 (在胸鰭基底之間的大部份比較黑的條紋, 在鰓縫之上, 在呼吸孔以下背鰭之間) 與斑點。 (偶然模糊) 鼻孔, 幾乎圓形, 大約位於從觸鬚到角落的 2/3個方法或嘴, 寬度在口前吻中的鼻孔超過 4.5 當成魚時; 口前吻的長度超過 2.3 從觸鬚到吻頂端倍距離。 (參考文獻 6871) 嘴的牙齒有黑邊; 下面突然全白色.(參考文獻 41394) 第一背鰭起點在眼徑或更多的胸鰭的鰭游離後端後面。 (參考文獻 247) 尾鰭幾乎直的, 有細長的上葉與下葉; 胸的發展良好的但是不是像鰭條一樣的.(參考文獻 6871)
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.
棲息於大陸棚與上層斜坡了。 形成魚群。 吃小魚,包括短號魚 ( Fistularia), 與甲殼動物。 卵胎生的, 有三個 -22 幼魚在一胎.(48360) 出生時的大小大約 31-34 公分。 可以活到超過 15 年。 生鮮使用與冷凍; 優良品質的肉。
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
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).東印度洋: 澳洲南部.(參考文獻 6871) 不會出現在中西太平洋.(參考文獻 31368)
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: 商業性
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Estimates based on models
Preferred temperature (Ref.
123201): 14 - 17.7, mean 15.4 °C (based on 112 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
營養階層 (Ref.
69278): 4.2 ±0.71 se; based on food items.
回復力 (Ref.
120179): 低的, 最小族群倍增時間4.5 - 14 年 (tmax=15; Fec=3).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (82 of 100).
