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No image available for this species; drawing shows typical species in Salmonidae.
分類 / 名前 共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
> Salmoniformes (Salmons) > Salmonidae (Salmonids) > Salmoninae
Etymology: Oncorhynchus:Greek, onyx, -ychos = nail + Greek, rhyngchos = snout (Ref. 45335); biwaensis:Name 'biwaensis' from the type locality of the species, Lake Biwa.
背鰭 (合計) : 14; 臀鰭: 11 - 14. This species is distinguished from its congeners by the following set of characters: dorsal, anal, pectoral and pelvic fin-rays [14 (mode 14), 11-14 (13), 13-14 (14) and 9 (9), respectively]; scales above and below lateral line [19-22 (21) and 21-24 (24), respectively)]; 43-65 (56) pyloric caeca; 0-15 (0) red spots laterally on body less than ca. 20 cm SL; body particularly slender in immature juveniles, body depth 20.9-26.7% of SL (average 23.3%); snout short, moderately pointed, length 5.5-7.0% of SL (6.2%); eye small, diameter 4.2-6.3% of SL (5.2%); interorbit narrow, width 6.7-8.0% of SL (7.4%); scales oblong, length/width ratio 1.26-1.64 (1.48); focus slightly forward of center, length of apical area/ length of basal area 0.99-1.45 (1.21); ridges circular, not disappearing in apical area (Ref 138051). Body shape (shape guide): elongated; Cross section: compressed.
Fujioka, Y., M. Kuwahara, R. Tabata, Y. Fuke and T. Nakabo, 2025. The Biwa salmon, a new species of Oncorhynchus (Salmonidae) endemic to Lake Biwa, Japan. Ichthyol. Res. 1-13. (Ref. 138051)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
系統多様性指数 (参照 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00457 (0.00176 - 0.01185), b=3.10 (2.88 - 3.32), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
栄養段階 (参照 69278): 3.6 ±0.4 se; based on size and trophs of closest relatives
回復力 (参照 120179): 手段, 1.4年~4.4年の倍増期間の最小個体群 (Preliminary K or Fecundity.).
漁業の脆弱性 (Ref. 59153): Low vulnerability (19 of 100). 🛈