Elasmobranchii
板鰓亞綱 (鯊魚與魟魚) (sharks and rays) >
Rhinopristiformes (Shovelnose rays) >
Pristidae (Sawfishes)
鋸鰩科 (Sawfishes)
Etymology: Pristis: Greek, pristis = saw (Ref. 45335).
More on author: Bleeker.
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋; 淡水; 半鹹淡水 居於水底的; 深度上下限 5 - 70 m (Ref. 114953). 熱帶; 30°N - 37°S, 20°E - 155°E (Ref. 114953)
Indo-West Pacific: Persian Gulf (Ref. 68964), Red Sea and east to South Africa, western India Sri Lanka, Laos to Papua New Guinea, south to New South Wales, western to eastern Australia (Ref. 114953).
印度-西太平洋: 紅海而且東非到巴布亞新幾內亞, 北至中國南部, 南至澳洲新南威爾斯。
Length at first maturity / 大小 / 重量 / 年齡
Maturity: Lm ?, range 430 - ? cm
Max length : 730 cm TL 雄魚/尚未辨別雌雄; (Ref. 5578); common length : 550 cm TL 雄魚/尚未辨別雌雄; (Ref. 11228)
Dark grey to blackish brown above, white to yellowish below (Ref. 11228).
深灰色的對暗褐色的上方, 腹面白色到淡黃色的.(參考文獻 11228)
Demersal on both insular and continental shelves, but now thought to be extinct through much if its original range (Ref. 114953). Inshore and intertidal species known to enter freshwater in some areas (Ref. 9859). Found in shallow bays, estuaries, and lagoons (Ref. 11228). Often on the bottom with its saw elevated at an angle to the body axis (Ref. 9859). Feeds on fishes and shellfishes (Ref. 58784). Ovoviviparous (Ref. 50449). Reaches maturity after 9 years. Females have litters of approximately 12 pups. Maturity size unclear, possibly near 430 cm TL; born at approximately 80 cm TL (Ref. 114953). Flesh considered tasty (Ref. 11228).
知道的沿海地區與潮間帶的種在一些地區進入淡水.(參考文獻 9859) 發現於淺灣，河口與潟湖.。 (參考文獻 11228) 時常在底部上用它的鋸子升高的以一個角到體軸.(參考文獻 9859) 捕食魚類與貝.(參考文獻 58784) 卵胎生的.(參考文獻 50449) 肉被認為是好吃的.(參考文獻 11228)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
Ovoviviparous, embryos feed solely on yolk (Ref. 50449).印度-西太平洋: 紅海而且東非到巴布亞新幾內亞, 北至中國南部, 南至澳洲新南威爾斯。
Compagno, L.J.V. and P.R. Last, 1999. Pristidae. Sawfishes. p. 1410-1417. In K.E. Carpenter and V. Niem (eds.) FAO identification guide for fishery purposes. The Living Marine Resources of the Western Central Pacific. FAO, Rome. (Ref. 9859)
IUCN 瀕危狀態 (Ref. 130435)
極危 (CR) (A2cd); Date assessed: 11 March 2022
人類使用
漁業: 商業性; 游釣魚種: 是的
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Estimates based on models
Preferred temperature (Ref.
123201): 24.6 - 29.3, mean 28.5 °C (based on 2833 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5234 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00198 - 0.01270), b=3.05 (2.83 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 4.0 ±0.6 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): Very high vulnerability (90 of 100).
Nutrients (Ref.
124155): Calcium = 12.4 [3.1, 55.8] mg/100g; Iron = 0.505 [0.120, 1.454] mg/100g; Protein = 19.3 [17.2, 21.4] %; Omega3 = 0.11 [0.04, 0.28] g/100g; Selenium = 81.8 [22.3, 265.0] μg/100g; VitaminA = 3.88 [1.41, 10.36] μg/100g; Zinc = 0.61 [0.29, 1.12] mg/100g (wet weight);
