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)
(Catfish) > Siluridae
Etymology: Silurus: Greek, silouros = a cat fish + Greek, odous = teeth (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
; 淡水 居于水底的. 溫帶
Asia: Endemic to Lake Biwa, Japan.
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)
Largest species among the Japanese silurid fishes (Ref. 37518).
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 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。
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 (Ref. 118484)
合作者照片Stamps, Coins Misc.声音神经毒速度泳型鳃区Otoliths脑重体重比眼睛色素
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 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. 120179
): 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) .