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Acipenseriformes (Sturgeons and paddlefishes) >
Polyodontidae (Paddlefishes)
Etymology: Polyodon: Greek, polys = a lot of + Greek, odous = teeth (Ref. 45335); spathula: From the words Poly, meaning many; don, tooth; and spathula, meaning blade or paddle (Ref. 10294).
More on author: Walbaum.
環境:環境 / 気候帯 / 深さの範囲 / 分布範囲
生態学
; 新鮮な水 底生の; potamodromous (Ref. 130035); 深さの範囲 2 - ? m. Subtropical; 10°C - 18°C (Ref. 2060); 49°N - 29°N, 112°W - 77°W (Ref. 86798)
North America: Mississippi River basin from southwestern New York to Montana and south to Louisiana; Gulf Slope drainagaes from Mobile Bay in Alabama, to Galveston Bay in Texas, USA. Formerly in Great Lakes basin, probably extirpated. At least one country reports adverse ecological impact after introduction.
サイズ / 重さ / 年齢
成熟: Lm ?  range ? - ? cm
Max length : 221 cm TL オス/雌雄の選別がない; (Ref. 86798); common length : 120 cm TL オス/雌雄の選別がない; (Ref. 12193); 最大公表体重: 90.7 kg (Ref. 3221); 最大記録サイズ: 55 年 (Ref. 46974)
Snout long, canoe-paddle-shaped; gill cover with large, fleshy, pointed flap (Ref. 86798).
Body shape (shape guide): elongated.
Adukts usually inhabit water deeper than 1.2 m in slow-flowing large rivers, lakes, and impoundments (Ref. 86798). They feed on plankton. The extended upper jaw (= paddle) may help to channel plankton into the mouth. Threatened due to over harvesting, habitat loss and pollution (Ref. 58490).
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Page, L.M. and B.M. Burr, 2011. A field guide to freshwater fishes of North America north of Mexico. Boston : Houghton Mifflin Harcourt, 663p. (Ref. 86798)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
脆弱 (VU) (A2cd); Date assessed: 14 September 2019
人間の用途
水産業: 商業; ゲームフィッシュ: はい; 水族館・水槽: 公共の水族館
用具
特記事項
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インターネットの情報源
モデルに基づく推定値
系統多様性指数 (参照
82804): PD
50 = 1.2500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00646 (0.00429 - 0.00971), b=3.09 (2.98 - 3.20), in cm total length, based on LWR estimates for this species (Ref.
93245).
栄養段階 (参照
69278): 3.1 ±0.0 se; based on diet studies.
回復力 (参照
120179): 低い, 4.5年~14年の倍増期間の最小個体群 (tm=6-9; tmax=30).
漁業の脆弱性 (Ref.
59153): Very high vulnerability (90 of 100).
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栄養素 (Ref.
124155): Calcium = 29.6 [13.4, 59.0] mg/100g; Iron = 1.11 [0.65, 1.86] mg/100g; Protein = 18.1 [15.6, 20.7] %; Omega3 = 0.356 [0.139, 0.908] g/100g; Selenium = 71.4 [29.0, 167.5] μg/100g; VitaminA = 11.8 [3.6, 39.5] μg/100g; Zinc = 0.737 [0.499, 1.125] mg/100g (wet weight);