Japan country information

Common names: Chousen-etsu, Estuarine tapertail anchovy, Etsu
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Occurs only in Ariake Sound (Ref. 189). Status of threat: Endangered (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

刀鲚(刀鱼), Anchovies, Pesce topo pelagico, ... more

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

Teleostei (teleosts) > Clupeiformes (Herrings) > Engraulidae (Anchovies) > Coiliinae
Etymology: Coilia: Greek, koilia, -as = abdomen, hollow (Ref. 45335).
More on authors: Temminck & Schlegel.

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

Marine; freshwater; brackish; pelagic-neritic; anadromous (Ref. 51243); depth range 0 - 50 m (Ref. 189). Subtropical; 42°N - 21°N, 109°E - 134°E (Ref. 189)

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

Northwest Pacific: Canton north to Ariake Sound, southwestern Japan, including all of Yellow Sea and off western coasts of Korea. Penetrates over 1000 km up the Yangtze River.

Length at first maturity / Size / Weight / Age

Maturity: L_m ?, range 24 - 27 cm
Max length : 41.0 cm TL male/unsexed; (Ref. 189)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 0; Anal spines: 0; Anal soft rays: 80. Body tapering, belly rounded before pelvic fins, with 16 to 26 + 25 to 36 = 43 to 61 keeled scutes from isthmus to anus. Maxilla long, reaching to or almost to base of first pectoral fin ray. Pectoral fin with 6 filaments; branched fin rays longer than those of pelvic fin.

Occurs in coastal waters, estuaries and reaching up to middle parts of rivers, apparently able to tolerate freshwater (Ref. 189, 11230). Lives in not really clean water but not really turbid water either (Ref. 12218). Goes to the deep water areas of rivers at night (Ref. 12218). Planktivore (Ref. 12218). Spawns around three times in a lifetime and spawning occurs in between reeds (Ref. 12218). In Ariake Sound, Japan it breeds from May to August, the fishes running about 15 km up the Chikugo River and spawning in freshwater, the spherical eggs floating down and hatching near the river mouth. Its relatively large size makes it a more esteemed food fish than most Coilia. Used in Chinese medicine (Ref. 12166).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Spawn in school (Ref. 205).

Main reference Upload your references | References | Coordinator | Collaborators

Whitehead, P.J.P., G.J. Nelson and T. Wongratana, 1988. FAO Species Catalogue. Vol. 7. Clupeoid fishes of the world (Suborder Clupeoidei). An annotated and illustrated catalogue of the herrings, sardines, pilchards, sprats, shads, anchovies and wolf-herrings. FAO Fish. Synop. 125(7/2):305-579. Rome: FAO. (Ref. 189)

IUCN Red List Status (Ref. 130435)

Endangered (EN) (A2bd); Date assessed: 01 March 2017

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: commercial

FAO(Publication : search) | FishSource |

More information

Trophic ecology
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Ecology
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Population dynamics
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Length-weight rel.
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Life cycle
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Anatomy
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Genetics
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Stamps, coins, misc.

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Summary page | Point data | Common names | Photos

Internet sources

Estimates based on models

Preferred temperature (Ref. 115969): 12.3 - 25.2, mean 17.5 (based on 218 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00251 (0.00190 - 0.00332), b=3.07 (3.02 - 3.12), in cm Total Length, based on LWR estimates for this species (Ref. 93245).

Trophic level (Ref. 69278): 3.0 ±0.00 se; based on food items.

Resilience (Ref. 120179): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.35; tmax=5).

Fishing Vulnerability (Ref. 59153): Low to moderate vulnerability (25 of 100).

Price category (Ref. 80766): Medium.

Coilia nasus Temminck & Schlegel, 1846