Japan country information

Common names: Amago, Honmasu, Sakuramasu
Occurrence: native
Salinity: freshwater
Abundance: common (usually seen) | Ref: Sokolovskaya, T.G., A.S. Sokolovskii and E.I. Sobolevskii, 1998
Importance: minor commercial | Ref: FAO, 1994
Aquaculture: commercial | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from north eastern Japan, western Japan and Lake Biwa (Ref. 559). Recorded from Nagara River, Honshu Island (Ref.6376), and Hokkaido (Ref. 37812). Also Ref. 12218, 27683, 78994. Category in the 2005 Red Data Book of Shiga Prefecture: important distribution (Ref. 79825). Status of threat: Near threatened (Ref. 94887).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ja.html
National Fisheries Authority: http://www.maff.go.jp/eindex.html
Occurrences: Occurrences Point map
Main Ref: Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984
National Database:

Common names from other countries

Saumon du Japon, Salmón japonés, Сима, ... more

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Salmoniformes (Salmons) > Salmonidae (Salmonids) > Salmoninae
Etymology: Oncorhynchus: Greek, onyx, -ychos = nail + Greek, rhyngchos = snout (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; freshwater; brackish; benthopelagic; anadromous (Ref. 51243); depth range 0 - 200 m (Ref. 50550). Temperate; 65°N - 34°N, 127°E - 158°E

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Northwest Pacific: Japan and adjacent waters.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 79.0 cm TL male/unsexed; (Ref. 56527); max. published weight: 10.0 kg (Ref. 9988)

The fluviatile form generally inhabits headwaters and often maintains a territory; it feeds mainly on insects but also on small crustaceans and fishes. The sea-run form goes downstream forming schools, and after a short stay in the brackish zone enters the sea where it feeds on small fishes and pelagic crustaceans. Oviparous (Ref. 205). Eggs are buried in unguarded nests (Ref. 205). Marketed fresh and frozen; eaten broiled and baked (Ref. 9988).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Distinct pairing (Ref. 205). Reproductive strategy: synchronous ovarian organization, determinate fecundity (Ref. 51846).

Main reference Upload your references | References | Coordinator | Collaborators

Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984. The fishes of the Japanese Archipelago. Vol. 1. Tokai University Press, Tokyo, Japan. 437 p. (text). (Ref. 559)

IUCN Red List Status (Ref. 130435)

Endangered (A1ac; B2abcde+3abd); Date assessed: 01 August 1996

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: commercial; aquaculture: commercial; gamefish: yes

FAO(Aquaculture: production; Fisheries: production; publication : search) | FishSource | Sea Around Us

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Estimates based on models

Preferred temperature (Ref. 115969): 0.3 - 16.5, mean 3.3 (based on 86 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00955 (0.00605 - 0.01506), b=3.03 (2.90 - 3.16), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.6 ±0.59 se; based on food items.

Resilience (Ref. 120179): Medium, minimum population doubling time 1.4 - 4.4 years (tm=4; tmax=6; Fec=1,000).

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (52 of 100).

Climate Vulnerability (Ref. 125649): Moderate to high vulnerability (49 of 100).

Price category (Ref. 80766): High.

Oncorhynchus masou (Brevoort, 1856)