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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.
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
; zoet water benthopelagisch; diepte 40 - 90 m (Ref. 138051). Subtropical
Asia: Japan.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ?  range ? - ? cm
Max length : 24.1 cm SL (female)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 14; Anale zachte stralen: 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.
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
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)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van geen belang
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Schattingen op basis van modellen
Fylogenetische diversiteitsindex (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00457 (0.00178 - 0.01174), b=3.10 (2.87 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Trofisch niveau (Ref. 69278) |
3.6 ±0.4 se; based on size and trophs of closest relatives |
Weerstandsvermogen (Ref. 120179) |
Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Preliminary K or Fecundity.). |
Kwetsbaarheid van de visserij (Ref. 59153) |
Moderate vulnerability (37 of 100). 🛈 |