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Silurus biwaensis (Tomoda, 1961)

Eurasian catfish
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Silurus biwaensis
Picture by Jean-Francois Helias / Fishing Adventures Thailand

分类 / Names 俗名 | 同种异名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii 辐鳍鱼纲 (条鳍鱼) > Siluriformes (Catfish) > Siluridae (Sheatfishes)
Etymology: Silurus: Greek, silouros = a cat fish + Greek, odous = teeth (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range 生态学

; 淡水 居于水底的.   溫帶

分布 国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri

Asia: Endemic to Lake Biwa, Japan.
亞洲: 琵琶湖,日本的特有種。

大小 / 重量 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 118 cm TL 雄鱼/尚未辨别雌雄; (Ref. 40637); 最大体重: 17.2 kg (Ref. 40637)

生物学特性     字汇 (例如 epibenthic)

Largest species among the Japanese silurid fishes (Ref. 37518).

在日本鲶鱼鱼之中的大种.(参考文献 37518)

Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | | 孕卵数 | 仔鱼

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.亞洲: 琵琶湖,日本的特有種。

主要参考文献 Upload your references | 参考文献 | 合作者 | 合作者

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)

世界自然保护联盟红皮书 (Ref. 120744)

  不评价 

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

  无害处的





人类利用

游钓鱼种: 是的
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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5001   [Uniqueness, from 0.5 = low to 2.0 = high].
营养阶层 (Ref. 69278):  4.2   ±0.8 se; Based on size and trophs of closest relatives
回复力 (Ref. 69278):  非常低的, 最小族群倍增时间超过14 年 (Preliminary K or Fecundity.).
脆弱性 (Ref. 59153):  High to very high vulnerability (71 of 100) .