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Dynamics of snails and their parasitic cercariae on tidal flats in Japan

Research Project

Project/Area Number 13680604
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionKagawa Medical University

Principal Investigator

HARADA masakazu  Kagawa Medical University, Fac. Med., Res. Assoc., 医学部, 助手 (90127580)

Co-Investigator(Kenkyū-buntansha) SUGURI setsuo  Kagawa Medical University, Fac. Med., Res. Assoc. Prof., 医学部, 助教授 (00032897)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2002: ¥400,000 (Direct Cost: ¥400,000)
Keywordscercaria / tidal flat / estuary / snail / environmental pollution / indicator species / 汚染
Research Abstract

As tidal flats have sharply decreased during this half century in Japan, the organisms living mainly in the habitat are on the crisis of extinction. So we planned to recognize the present condition of the snails and their trematode parasites in tidal flats. We surveyed many tidal flats in Japan. In the Sanbanse, the Fujimae flat, the Shimanto River, the Kakise River and the Kokuba River, the snails were hardly collected. In the Yoshino River snails were living on the very restricted area, and the infected snails were not detected. In the Sone flat many snails belonging to four species are living on the flat, but no snails were infected by any cercariae. In the four tidal flats in Kagawa Pref. five species of cercaria were detected from three species of snails. Especially in the Doki River Cerithidea rhizophorarum were parasitized by two species of cercariae with high rate, but co-infection rates of two species were significantly lower than the expectation value when two species of cercaria infect to the snail independently. It is concluded that two species of ceracaria infect the snails avoiding each other, but not completed exclusive. In the Awase tidal flat four species of snails were infected by cercariae. And in the Urauchi River two species of snails were coexist sympatric in the restricted area, but the parasite rates were significantly different between snail species. It is concluded that the one species were preferred to the other. Snails and cercariae living in the tidal flats in Japan were decreased more than we expected. However, in Kagawa Pref. and Okinawa Pref. the tidal flats maintained the diversity of organisms.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] H.Ishikawa: "A mathematical model for the transmission of Plasmodium vivax malaria"Parasitol.Int.. 52. 81-93 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 高 静花: "大阪市居住者にみられた東洋眼虫寄生の1症例"日本眼科紀要. 54(印刷中). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Harada: "Superoxide-dependent and -independent pathways are involved in the transmission blocking of malaria"Parasitol.Res.. 87. 605-608 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Harada: "A histochemical study of the secretory gland cells of Cercaria shikokuensis and their role during development from cercaria to metacercaria"Parasitol.Int.. 50. 149-156 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Owhashi: "The role of saliva of Anopheles stephensi in inflammatory response : identification of a high molecular weight neutrophil chemotactic factor"Parasitol.Res.. 87. 376-382 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 高橋 優三: "虫のしらせ"三恵社. 448 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H. Ishikawa, et al.: "A mathematical model for the transmission of Plasmodium vivax malaria"Parasitol. Int.. 52. 81-93 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S. Koh, et al.: "A case of human Thelaziasis with a resident in Osaka city"Folia Ophthalmologica Japnonica. 54 in press. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Harada, et al.: "Superoxide-dependent and -independent pathways are involved in the transmission blocking of malaria"Parasitol Res.. 87. 605-608 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Harada, et al.: "A histochemical study of the secretory gland cells of Cercaria shikokuensis and their role during development from cercaria to metacercaria"Parasitol. Int.. 50. 149-156 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Owhashi, et al.: "The role of saliva of Anopheles stephensi in inflammatory response: identification of a high molecular weight neutrophil chemotactic factor"Parasitol Res.. 87. 376-382 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Harada, et al. (Eds. Y. Takahashi and S. Kasuya): "A hunch, Snails and their parasitic cercariae inhabiting the tidal flats and estuaries - As a candidate of the indicator species -."Sankeisha. 427-433 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S. Suguri, et al. (Eds. Y. Takahashi and S. Kasuya): "A hunch, Species identification using the diversity of the sequences of the COI gene in sand fly and tse-tse fly"Sankeisha. 361-364 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M. Owhashi, et al. (Eds. Y. Takahashi and S. Kasuya): "A hunch, Neutrophil chemotactic factor and neutrophilstimulating factor derived from Anopheles stephensi"Sankeisha. 185-192 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Ishikawa: "A mathematical model for the transmission of Plasmodium vivax malaria"Parasitol. Int.. 52. 81-93 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 高 静花: "大阪市居住者にみられた東洋眼虫寄生の1症例"日本眼科紀要. 4(印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Harada: "Superoxide-dependent and -independent pathways are involved in the transmission blocking of malaria"Parasitol Res. 87. 605-608 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Harada: "A histochemical study of the secretory gland cells of Cercaria shikokuensis And their role during development from cercaria to metacercaria"Parasitol. Int.. 50. 149-156 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Owhashi: "The role of saliva of Anopheles stephensi in inflammatory response : identification of a high molecular weight neutrophil chemotactic factor"Parasitol Res. 87. 376-382 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] 高橋優三: "虫のしらせ"三恵社. 448 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Harada: "A histochemical study of the secretory gland cells of Cercaria shikokuensis and their role during development from cercaria to metacercaria"Parasitol. Int.. 50. 149-156 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Harada: "Superoxide-dependent and-independent pathways are involved in the transmission blocking of malaria"Parasitol. Res.. 87. 605-608 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 原田正和: "吸血性ベクターのPCRによる吸血源同定法の研究-各種動物DNAのPCRによる鑑別-"Med. Entomol. Zool.. 52(2). 158 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Owhashi: "The role of saliva of Anopheles in infiammatory response : identification of a high molecular weight neutrophil chemotactic factor"Parasitol. Res.. 87. 367-382 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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