分類 / 名稱
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Chondrostei >
Acipenseriformes (Sturgeons and paddlefishes)
鱘形目 (Sturgeons and paddlefishes) >
Polyodontidae (Paddlefishes)
匙吻鱘 (Paddlefishes)
Etymology: Psephurus: Greek, psephas, -aos = dark + Greek, oura = tail (Ref. 45335).
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
海洋; 淡水; 半鹹淡水 居於水底的; 溯河洄游 (Ref. 117880). 亞熱帶的
Asia: China, endemic to the Yangtze River and its tributaries.
亞洲: 中國, 長江與它的支流的特有種。 國際間的買賣限制 ( 引用2, 自從 1.4.98 以後; 公分 附錄 2).
大小 / 重量 / 年齡
成熟度: Lm ? range ? - ? cm
Max length : 300 cm TL 雄魚/尚未辨別雌雄; (Ref. 28581); 最大體重: 300.0 kg (Ref. 28581)
Head very long, snout extraordinarily long, pointed and paddle-like and base broad; mouth very large.
Body shape (shape guide): elongated.
頭部非常長的, 吻特別長﹐尖的與像槳一樣與基底寬的; 嘴非常大的。
This species is considered anadromous for it spends at least part of its life in the sea and migrates upriver to reproduce. It occurs in broad surfaced main streams of large rivers, usually staying in the middle and lower layers of the water column and occasionally swims into large lakes. Spawning period is in March and April with spawning sites located in the upper reaches of the Changjiang River but was also reported to take place in the lower Jinsha River between Shuifu and Yibin (Ref. 117880). It grows to 3 m in length and 300 kg in weight (Ref. 28581). Reported length of 7 m SL (Ref. 6866) and 500 kg weight (Ref. 4537, 58490) are doubtful (Paxton, pers. comm.). Piscivorous throughout most of its life. Threatened due to over harvesting and habitat loss (Ref. 58490). Expected number of mature individuals in the wild, less than 50, but more extensive surveys are needed across its range to confirm its existence; last seen in 2003 (Ref. 117880).
生長到 3 公尺長與 300 公斤重.(參考文獻 28581) 7 公尺 SL(參考文獻 6866) 與 500 公斤重量 (參考文獻 4537,58490) 的報告長度是可疑的 (Paxton ， pers. Comm.)。 以魚為食的它生命中的大部分時間。 受威脅的捕穫之上由於與棲息地損失.(參考文獻 58490)
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
亞洲: 中國, 長江與它的支流的特有種。 國際間的買賣限制 ( 引用2, 自從 1.4.98 以後; 公分 附錄 2).
Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott, 1991. World fishes important to North Americans. Exclusive of species from the continental waters of the United States and Canada. Am. Fish. Soc. Spec. Publ. (21):243 p. (Ref. 4537)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
滅絕 (EX) ; Date assessed: 14 September 2019
人類使用
漁業: 商業性
工具
特別的報告
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網路資源
基於模型的估計
系統發育多樣性指數 (參考文獻
82804): PD
50 = 1.2500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00195 - 0.01287), b=3.10 (2.88 - 3.32), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (參考文獻
69278): 4.2 ±0.73 se; based on food items.
回復力 (參考文獻
120179): 低的, 最小族群倍增時間4.5 - 14 年 (tm=5-15).
釣魚的脆弱性 (Ref.
59153): Very high vulnerability (90 of 100).
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