Elasmobranchii
板鳃亚纲 (鲨鱼与 鱼) (sharks and rays) >
Rhinopristiformes (Shovelnose rays) >
Pristidae (Sawfishes)
Etymology: Pristis: Greek, pristis = saw (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生态学
海洋; 淡水; 半咸淡水 居于水底的; 非产卵性溯降河的 (Ref. 51243); 深度上下限 10 - 88 m (Ref. 114953). 亞熱帶的; 16°C - 30°C
Atlantic and South-West Indian Oceans; once widespread.
Circumglobal。 西大西洋: 北卡羅萊那州 (美國) ，百慕達群島與墨西哥灣北部到巴西.(參考文獻 7251) 加勒比海, 稀有的在百慕達群島.(參考文獻 26938) 東大西洋: 直布羅陀到那米比亞; 可能地在地中海中.(參考文獻 9859) 印度-西太平洋: 紅海而且東非到菲律賓.(參考文獻 9859) 可能出現在東太平洋。 (參考文獻 9859)
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 760 cm TL 雄鱼/尚未辨别雌雄; (Ref. 6871); common length : 550 cm TL 雄鱼/尚未辨别雌雄; (Ref. 6871); 最大体重: 350.0 kg (Ref. 3164)
Diagnosis: Pristis pectinata is easily separable from Pristis perotteti by the following characters: its first dorsal fin originates about over the origin of its pelvic fins vs. considerably in front of origin of pelvic fins in P. perotteti; its caudal fin is much shorter, but broader relative to the length of the fin, with lower lobe only faintly indicated; its rostral teeth are numerous, 23 or more on each side vs. not more than 20 in P. perotteti; its saw is relatively somewhat shorter; its second dorsal fin has the posterior margin much less deeply concave; and its pectoral fins are smaller (Ref. 6902, 81624). Pristis pectinata agrees with Pristis pristis in the shape of its caudal fin and in the position of the first dorsal fin relative to the pelvic fins, but it can be separated from P. pristis by its more numerous rostral teeth, 23 or more on each side vs. less than 20 (Ref. 6902, 81624).
长的，平坦的，和刀剑状的喙部有 24 到 32个对齿沿着边缘; 尾鳍大的且斜没有下叶.(参考文献 26938) 深灰色对暗褐色的上方，灰白沿着鳍的边缘。 白色到白灰色或白黄色的在.之下 (参考文献 6902)
Inshore and intertidal species, but may cross deep water to reach offshore islands; also ascends rivers and can tolerate fresh water (Ref. 9859). Commonly seen in bays, lagoons, estuaries, and river mouths. Also found in rivers and lakes (Ref. 12951). Feeds on fishes and shellfishes (Ref. 58784). Ovoviviparous (Ref. 50449). Gravid females reportedly carry as many as 20 embryos, which require a year of gestation (Ref. 27549). Uses its saw to stir the bottom when feeding on bottom invertebrates and to kill pelagic fishes (Ref. 9859). Utilized as a food fish; oil is used to make medicine, soap and in leather tanning (Ref. 6871). Adults stuffed for decoration (Ref. 6871). Reported to be aggressive towards sharks when kept in tanks (Ref. 12951). This species is currently protected in several areas as populations are under severe threat (Ref. 81624).
沿海地区与潮间带的种, 但是可能越过深水域达到离岸岛屿; 也溯河而且能容忍淡水.(参考文献 9859) 常见于海湾，泻湖，河口与河口。 也发现于河川与湖泊。 (参考文献 12951) 卵胎生的.(参考文献 50449) 使用它的锯子搅动底部当捕食底栖无脊椎动物与杀大洋性的鱼.(参考文献 9859) 作为食用鱼; 油被用来制造药，肥皂与在皮革硝皮中.(参考文献 6871) 成鱼装填装饰。 (参考文献 6871) 当保存于水族箱了，报告是对鲨鱼有侵略性。 (参考文献 12951)
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
Ovoviviparous, with gravid females containing about 15-20 embryos (Ref. 3163). Embryos feed solely on yolk (Ref. 50449). Gives birth in shallow bays and estuaries (Ref. 12951). Size at birth 61 cm (Ref. 12951).Circumglobal。 西大西洋: 北卡羅萊那州 (美國) ，百慕達群島與墨西哥灣北部到巴西.(參考文獻 7251) 加勒比海, 稀有的在百慕達群島.(參考文獻 26938) 東大西洋: 直布羅陀到那米比亞; 可能地在地中海中.(參考文獻 9859) 印度-西太平洋: 紅海而且東非到菲律賓.(參考文獻 9859) 可能出現在東太平洋。 (參考文獻 9859)
Last, P.R. and J.D. Stevens, 1994. Sharks and rays of Australia. CSIRO, Australia. 513 p. (Ref. 6871)
人类利用
渔业: 低经济; 游钓鱼种: 是的
更多信息
参考文献养殖养殖信息品种遗传学Electrophoreses遗传率疾病加工NutrientsMass conversion
工具
特别资料
下载 XML
网络资源
Estimates based on models
Preferred temperature (Ref.
123201): 22.9 - 28, mean 27.1 °C (based on 776 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5234 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00407 (0.00161 - 0.01032), b=3.02 (2.80 - 3.24), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
营养阶层 (Ref.
69278): 4.5 ±0.80 se; based on food items.
Generation time: 32.3 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
回复力 (Ref.
120179): 低的, 最小族群倍增时间4.5 - 14 年 (Fec=15).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (84 of 100).
