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) >
Rhinopristiformes (Shovelnose rays) >
Pristidae (Sawfishes)
鋸鰩科 (Sawfishes)
Etymology: Pristis: Greek, pristis = saw (Ref. 45335).
More on authors: Müller & Henle.
Issue
Synonym of Pristis pristis (Linnaeus, 1758) according to Faria et al., 2012 (Ref. 93006:11) and Weigmann, 2016 (Ref. 106604); status confirmed by William White (pers. Comm., Feb 2016).
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋; 淡水; 半鹹淡水 底中水層性; 非產卵性溯降河的 (Ref. 51243); 深度上下限 1 - 122 m (Ref. 55273), usually ? - 10 m (Ref. 55273). 熱帶; 32°N - 19°S, 106°W - 15°E (Ref. 55273)
Northwest Atlantic: Texas, Florida. Northeast Atlantic: West Africa. Eastern and Western Central Pacific: off northern Australia. Indo-China: East Indies. South America: Amazon near Santárem, Brazil.
西北大西洋: 德克薩斯，佛羅里達。 東北大西洋: 非洲西方部。 中太平洋東部與西部: 外海的澳洲北部。 印度支那: 東印度群島。 南美洲: 在 Santarem 巴西附近的亞馬遜河。
Length at first maturity / 大小 / 重量 / 年齡
Maturity: Lm ?, range 300 - ? cm
Max length : 650 cm TL 雄魚/尚未辨別雌雄; (Ref. 6902); 最大體重: 591.0 kg (Ref. 6902)
簡短描述
型態特徵 | 形態測量圖
Fewer sawteeth (normally 19, rarely 20 on a side). First dorsal fin originate in advance of the origin of the pelvic fins and much more deeply concave posterior margins of the dorsal fins. Saltwater species when fresh-caught, either dark gray or golden brown, while freshwater species are mouse gray with reddish along midback posterior to first dorsal fin, reddish posterior to lower part of sides, first dorsal pale yellow with reddish free rear corner; second dorsal, pelvic fins, caudal and lower sides posterior to first dorsal dull brick red. Reddish tint either normal or result of suffusion with blood below the skin (Ref. 6902).
較少的鋸齒.(通常 19, 很少地 20 在一個側邊上) 第一背鰭開始在腹鰭的起源前面而且更加深深地凹曲背鰭的後緣。 鹽水的種新鮮時-也捕捉了深灰色或者金褐色, 然而淡水種是捕鼠灰色的有淡紅的沿著背部中央在第一背鰭後面, 淡紅的在側邊的較下面的部位後面, 第一背鰭白黃色的有淡紅的色彩自由後面的角落; 第二背鰭，腹鰭, 尾部的與下側在第一背鰭後面暗磚紅色的。 淡紅的色彩或正常或由於充滿血液在皮膚之下.(參考文獻 6902)
Inhabits shallow water in the vicinity of the shore and estuarine, particularly lagoons. Generally thought to rarely descend below 10m but have been found at 122m in Lake Nicaragua (Ref. 55273). Tends to run farther upstream in large rivers. Found in temperatures higher than 20-30°C (Ref. 6902). Ovoviviparous (Ref. 50449). Minor commercial, for the curio trade (Ref. 37548).
在鄰近海岸棲息於淺水區與河口的, 特別地潟湖。 通常在湖尼加拉瓜認為很少地下降到 10 公尺之下但是有是被發現於 122 公尺。 (參考文獻 55273) 傾向在大河游到更上游。 發現於溫度高於 20-30 °C了。 (參考文獻 6902) 卵胎生的.(參考文獻 50449) 較小的商業, 對於古董交易.(參考文獻 37548)
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).西北大西洋: 德克薩斯，佛羅里達。 東北大西洋: 非洲西方部。 中太平洋東部與西部: 外海的澳洲北部。 印度支那: 東印度群島。 南美洲: 在 Santarem 巴西附近的亞馬遜河。
Ferreira, E.J.G., J.A.S. Zuanon and G.M. dos Santos, 1998. Peixes comerciais do médio Amazonas. Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis. 211p. (Ref. 27548)
人類使用
漁業: 低經濟
更多資訊
參考文獻養殖養殖資訊品種遺傳學Electrophoreses遺傳率疾病加工NutrientsMass conversion
合作者照片Stamps, Coins Misc.聲音神經毒速度泳型鰓區Otoliths腦重體重比眼睛色素
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Estimates based on models
Preferred temperature (Ref.
123201): 26.1 - 28.5, mean 27.6 °C (based on 544 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5234 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00832 (0.00404 - 0.01712), b=3.00 (2.81 - 3.19), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
營養階層 (Ref.
69278): 4.0 ±0.6 se; based on size and trophs of closest relatives
Generation time: 12.3 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
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).
