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Taxonomic reexamination and geographic distribution of copepods known asAcartia clausi in Japanese Coastal and inlet waters

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Abstract

Abundant planktonic copepods which have been attributed toAcartia clausi in Japanese coastal and inlet waters were revised by examining specimens from various localities. It is concluded that they consist of two species,A. omorii andA. hudsonica, and no other closely related species occur in Japanese waters.A. omorii is widespread in coastal waters and bays, whileA. hudsonica is strictly confined to brackish waters and closed embayments, in which the two species usually co-occur. The two species are readily distinguished by the shape of the inner lobe of the 3rd segment of the right 5th leg in the male. But the relative lengths of the 2nd and 3rd segments of the male left 5th leg, which separate the two species in Bradford's key to the subgenusAcartiura, did not differ clearly between the specimens of the two species examined here. The body size is also an important distinctive character of the two species especially when water temperature is low.

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References

  • Bradford, J.M. (1976): Partial revision of theAcartia subgenusAcartiura (Copepoda: Calanoida: Acartiidae). N.Z. J. Mar. Freshw. Res.,10, 159–202.

    Google Scholar 

  • (1984): 1983 3,7, 344–365.

  • Mori, T. (1937): The pelagic Copepoda from the neighbouring waters of Japan. Soyo-sha, Tokyo, 1–150, pls. 1–80. (Second edition 1964)

  • (1983): No. 24, (I), 38–65.

  • (1982):39, 39–60.

  • (1977):51, 132–141.

  • (1982):11, 49–65.

  • Tanaka, O. (1965): The pelagic copepods of the Izu region, middle Japan. Systematic account XIII. Parapontellidae, Acartiidae and Tortanidae. Publ. Seto Mar. Biol. Lab.,12, 379–408.

    Google Scholar 

  • (1978):Acartia clausi 25, 55–66.

  • (1980): -I. 1975 4 854, 171–194.

  • (1982): -II. 1975 9 1976 458, 1–22.

  • Ueda, H. (1986): Redescription of the planktonic calanoid copepodAcartia hudsonica from Atlantic and Pacific waters: A new record from Japanese waters. J. Oceanogr. Soc. Japan,42, 124–133.

    Google Scholar 

  • Ueda, H., A. Kuwahara, M. Tanaka and M. Azeta (1983): Underwater observations on copepod swarms in temperate and subtropical waters. Mar. Ecol. Prog. Ser.,11, 165–171.

    Google Scholar 

  • (1985): 58, 174–194.

  • Yamazi, I. (1956): Plankton investigation in inlet waters along the coast of Japan XIX. Regional characteristics and classification of inlet waters based on the plankton communities. Publ. Seto Mar. Biol. Lab.,5, 157–193.

    Google Scholar 

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Authors and Affiliations

  1. Department of Marine Sciences, College of Science, University of the Ryukyus, Nishihara, 903-01, Okinawa, Japan

    Hiroshi Ueda

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  1. Hiroshi Ueda
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1985 11 29, 1986 2 10, 1986

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Ueda, H. Taxonomic reexamination and geographic distribution of copepods known asAcartia clausi in Japanese Coastal and inlet waters. Journal of the Oceanographical Society of Japan 42, 134–138 (1986). https://doi.org/10.1007/BF02109100

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  • DOI: https://doi.org/10.1007/BF02109100

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