Japan country information

Common names: Chishima wakasagi, Wakasagi, ????
Occurrence: native
Salinity: freshwater
Abundance: common (usually seen) | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Spawns in rivers from January to March. Cultured and released for fishery in Japan. Most common osmerid in Japan. Hokkaido (Ref. 37812). Recorded from Lake Biwa (Ref. 78994).
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/ja.html
National Fisheries Authority: https://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:

Classification / Names

Actinopterygii (ray-finned fishes) > Osmeriformes (Smelts) > Osmeridae (Smelts)
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Корюшка малоротая японская, Wakasagi, Kunashir smelt, ... more

Main reference

Saruwatari, T., J.A. López and T.W. Pietsch. 1997. (Ref. 33312)
References | Biblio | Coordinator | Collaborators

Size / Weight / Age

Max length : 17.0 cm TL male/unsexed; (Ref. 5723)

Length at first maturity
L_m ?, range 6 - 7 cm

Environment

Marine; freshwater; brackish; pelagic; anadromous (Ref. 51243)

Climate / Range

Temperate, preferred ?

Distribution

Asia: Japan to the Korean Peninsula (not confirmed by Ref. 33312). USA report adverse ecological impact after introduction.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 0; Dorsal soft rays (total): 8-10; Anal spines: 0; Anal soft rays: 12 - 19; Vertebrae: 53 - 57. Vomer T-shaped with well-developed posterior process; periphery of glossohyal bone with single row of conical teeth, central part toothless; gill rakers 10(7-11) + 23(20-25) = 32(29-36); pyloric caeca 4(1-6); base of adipose fin less then 20% of head length; eye large; adipose eyelid absent.

Found in open water of impoundments and their tributaries, in fresh and brackish water. Primarily a brackish water species (Ref.33312). Anadromous (Ref. 37812).

IUCN Red List Status (Ref. 115185)

Not Evaluated

Threat to humans

Potential pest (Ref. 13364)

Human uses

Fisheries: commercial; aquaculture: commercial

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
Stocks
Ecology
Diet
Food items
Food consumption
Ration

Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development

Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
Recruitment
Abundance

References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion

Collaborators
Pictures
Stamps, Coins
Sounds
Ciguatera
Speed
Swim. type
Gill area
Otoliths
Brains
Vision

Tools

Special reports

Check for Aquarium maintenance | Check for Species Fact Sheets | Check for Aquaculture Fact Sheets

Download XML

Summary page | Point data | Common names | Photos

Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD₅₀ = 0.5313 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
3.2 ±0.3 se; Based on size and trophs of closest relatives

Resilience (Ref. 69278)
High, minimum population doubling time less than 15 months (tm=1; Fec = 1,033; post-spawning mortality almost 100%)

Vulnerability (Ref. 59153)
Low to moderate vulnerability (29 of 100)

Price category (Ref. 80766)
Low

Hypomesus nipponensis McAllister, 1963