Keys to the Freshwater Fishes
of Japan Fully Illustrated in Colors(2)
One of three species of Silurus
that are in Japan. The rock catfish, S.lithophilus,
the Biwi catfish,S.
the far eastern catfish S.
This species primarily occurs in lakes but is also
found in rivers (Ministry of the Environment Government
of Japan 2015). Remarks:
The extent of occurrence (EOO) for this species is
1,239 km2, it is known from six locations (based on
the number of spawning grounds) and there is continuing
decline in the extent and quality of the spawning
habitat due to road construction and construction
of embankments for flood control. The population size
is in decline due to overharvesting. There has been
a decline in catches in recent years and it is considered
to be overfished (Ministry of the Environment Government
of Japan 2015). This species therefore qualifies for
listing as Vulnerable (IUCN 2017).
Biwa and Lake Yogo, Japan. Type locality:
Near Onoé, Lake Biwa-ko, Japan.
Keys to the Freshwater Fishes of Japan Fully Illustrated
in Colors. Hokuryukan, 1963. Ferraris, C.J. Jr., 2007. Checklist
of catfishes, recent and fossil (Osteichthyes: Siluriformes),
and catalogue of siluriform primary types. Zootaxa
1418:1-628. Hasegawa, K., Kanao, S. & Mukai, T.
2019. Silurus lithophilus. The IUCN Red List of Threatened
Species 2019. Eschmeyer, W.N., Fricke, R. and Van der Laan,
R. (eds). 2017. Catalog of Fishes: genera,
species, references. Updated 03 January 2017.