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Silurus biwaensis
画像によって Jean-Francois Helias / Fishing Adventures Thailand
画像 | グーグルの画像
画像によって Jean-Francois Helias / Fishing Adventures Thailand
分類 / 名前 共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
> Siluriformes (Catfishes) > Siluridae (Sheatfishes)
Etymology: Silurus: Greek, silouros = a cat fish + Greek, odous = teeth (Ref. 45335).
Etymology: Silurus: Greek, silouros = a cat fish + Greek, odous = teeth (Ref. 45335).
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. Temperate
分布 領土 | 国連食糧農業機関の区域 | エコシステム | 事件 | 目的のマップ | 導入 | Faunafri
Asia: Endemic to Lake Biwa, Japan.
サイズ / 重さ / 年齢
成熟: Lm ? range ? - ? cm
Max length : 118 cm TL オス/雌雄の選別がない; (Ref. 40637); 最大公表体重: 17.2 kg (Ref. 40637)
Max length : 118 cm TL オス/雌雄の選別がない; (Ref. 40637); 最大公表体重: 17.2 kg (Ref. 40637)
Largest species among the Japanese silurid fishes (Ref. 37518).
ライフサイクルと交尾行動 成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Based on observations, a female first searches for a spawning site, with a male following behind. Immediately the female stops, the male first places his head under that of the female and then, by bending his body towards her anal fin, positions himself such that his tail is towards the end of the female's snout. From this position, the male then begins to wrap his tail around the head of the female, gradually winding his body tighter and moving along the body of the female until positioned at the center of her body. The male then winds his body tightly around the dorsal side of the female's abdomen for 20-30 seconds. The female then shakes her head from side to side several times, and orientates her body downward. This behavior causes the male to become separated from the female. Immediately after separation, the female releases a large number of eggs, and circles around with the male following on the inside. Although gamete release by the male was not actually observed, it seems likely that the eggs are fertilized during circling. After circling, the pair turns round twice violently, causing the eggs to become widely scattered. The pair then swim away with the female in the lead.
主な参考文献
参考文献のアップロード | 参考文献 | コーディネーター | 協力者
Kobayakawa, M., 1989. Systematic revision of the catfish genus Silurus, with description of a new species from Thailand and Burma. Jap. J. Ichthyol. 36(2):155-186. (Ref. 9417)
CITES
Not Evaluated
人間に対する脅威
Harmless
人間の用途
ゲームフィッシュ: はい
FAO - Publication: search | FishSource |
より多くの情報
解剖学
カマ
脳
オトリス
カマ
脳
オトリス
生理学
体組成
栄養素
酸素消費
水泳タイプ
泳ぐ速さ
視覚色素
フィッシュ・サウンド
病気と寄生虫
毒性（LC50）
体組成
栄養素
酸素消費
水泳タイプ
泳ぐ速さ
視覚色素
フィッシュ・サウンド
病気と寄生虫
毒性（LC50）
用具
特記事項
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インターネットの情報源
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モデルに基づく推定値
系統多様性指数 (参照 82804): PD50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00562 (0.00281 - 0.01127), b=3.00 (2.83 - 3.17), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
栄養段階 (参照 69278): 4.2 ±0.8 se; based on size and trophs of closest relatives
回復力 (参照 120179): 非常に低い, １４年以上の倍増期間の最小個体群 (Preliminary K or Fecundity.).