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Corbicula japonica:   (click for more)

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Synonyms
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  • Corbicula bifrons  Reinhaldt, 1877
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  • Corbicula ovalis  Reinhaldt, 1877
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  • Corbicula fuscata atrata  Renhaldt, 1878
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  • Corbicula transversa  Martens, 1877
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  • Corbicula martensi  Clessin, 1878
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  • Corbicula doenitziana  Clessin, 1878
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  • Corbicula sadoensis  Pilsbry, 1901
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  • Corbicula nipponensis  Pilsbry, 1907
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  • Corbicula n.delicata  Pilsbry, 1907
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  • Corbicula yokohamensis  Sowerby, 1877
    FAO Names
    En - Japanese corbicula, Fr - Cyrène japonaise, Sp - Corbicula japonesa.
    3Alpha Code: CMJ     Taxonomic Code: 3162102502
    Diagnostic Features
    Shell rounded trigonal, well-inflated, with thick dark brown or black periostracum. Beak high.  Outer surface ornamented with more or less regularly spaced commarginal ribs which are more distantly spaced in young shell.  Young shell with yellowish green radial streaks. The shell color inside is violet, sinus absent. 
    Geographical Distribution
    The species is widespread in Japan Sea from East Korea Bay to western coast of Sakhalin. Distributed in brackish water lakes and tidal flats of rivers from the South of Japan (35ºN) to South of Sakhalin (50ºN), (Kafanov, 1991).
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    Habitat and Biology
    Occurs on sands and aleurite sands. Live burrowed in soft bottoms of shallow subsaline waters near river estuaries, firths, lagoons and lakes connected with sea by canals.Suspension filter-feeders (Yamamuro, M. & Koike, 1993).
    Sexes separate. Spawning season: July to September (Maru, 1981) 
    Size
    Largest specimen is about 60 mm long.
    Interest to Fisheries
    Very popular in Japan. In Primorye, the mollusk is landed commercially with subsequent export abroad. FAO's Yearbook of Fishery Statistics reports a range of yearly capture production from around 27597 mt in 1995 to 21015 mt in 1999 (Japan, Korea Rep) Inland waters Asia. FAO's Yearbook of Fishery Statistics reports a range of yearly aquaculture production from around 10232 mt in 1995 to 11171 mt in 1999 (China, Taiwan).
    It is famous as material of miso soup in Japan
    Local Names
    JAPAN : Yamato shijimi .
    Bibliography
    Kafanov, AI. - 1991Bivalves on continental shelf and continental slope of Northern Pacific. Redaktsionno-izdatelskii otdel DVO AN SSSR, Vladivostok. .  81-82..
    Maru, K. - 1981. Reproductive cycle of the brackish-water bivalve, Corbicula japonica, in lake Abashiri. Sci. Rep. Hokkaido Fish. Exp. Stn. .  23: 83-95.. in Japanese.
    McMahon, R. F. - 1983. Ecology of an invasive pest bivalve, Corbicula. In W. D. Russell-Hunter, editor. The mollusca. Ecology. Academic Press, New York. .  pp 505-561 ..
    Yamamuro, M & Koike, I - 1993. Nitrogen metabolism of the filter-feeding bivalve Corbicula japonica and its significance in primary production of a brackish lake in Japan. Limnology and Oceanography. .  38, 997-1007..
     
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