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2000 Fiscal Year Final Research Report Summary

Study on sexal-selection and mating success of a subsocial spider mite.

Research Project

Project/Area Number 11640626
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 生態
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

SAITO Yutaka  Hokkaido Univ., Graduate School of Agriculture, Professor, 大学院・農学研究科, 教授 (20142698)

Project Period (FY) 1999 – 2000
KeywordsSEXUAL SELECTION / AGGRESSION / TETRANY CHIDAE / SUBSOCIALITY
Research Abstract

1999 : I conducted behavioral and morphological observations on Schizotetranychus miscanthi Saito which has subsocial life. I first established several morphological characters of S.miscanthi which reflect mite body size regardless of mounting methods. Then I conducted field surveys on male distribution patters over nests in order to know how the male-male aggressions observed under experimental conditions really reflect male behavior in fields. The result showed that the male-male aggression in S.miscanthi well correspond to the male aggregation pattern per nest in fields. Furthermore, it was revealed that the two groups of S.miscanthi having different levels of male aggression are sexually isolated and they are considered to be different sub-species or species.
2000 : The potential males (just before molting) and actual males (adult) of S.miscanthi were collected in various districts and inspected their morphology. The male leg I length of Iriomote population showed bimodal frequency distribution, though it showed uni-modal distribution in most populations of Honshu and Kyushu Islands, seggesting division of male mating tactic in Iriomote population. Under experimental conditions, I could get small and large adults by controlling food conditions. Then the mating success of males and females having different body size was evaluated. The result showed that there is no significant difference among all combinations during 24 hr mating period. However, in order to know more precise result, I should continue this experiment by shortening the mating period in the future.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Saito,Yutaka: "Inbreeding depression by recessive deleterious genes affecting female fecundity of a haplo-diploid mite."J.Evolutionary Biology. 13. 668-678 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Saito,Yutaka: "Correspondence of male-to-male aggression to spatial distribution of individulas in field populations of a subsocial spider mite."J.Ethology. 18. 79-83 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sato,Yukie: "Reproductive lsolation between populations showing different aggression in a subsocial spider mite, Schiozotetranychus miscanthi Saito (Tetranychidae : Acari)."Applied Entomology and Zoology. 35. 605-610 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sato,Yukie: "Patterns of reproductive isolation between two groups of Schizotetranychus miscanthi Saito (Tetra-nychidae : Acari) showing different male aggression traits."Applied Entomology and Zoology. 35. 611-618 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Saito,Yutaka: "Do kin selection and itra-sexual selection operate in spider mites?"Experimental and Applied Acarology. 24. 351-363 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Saito, Y., K.Sahara and K.Mori.: "Inbreeding depression by recessive deleterious genes affecting female fecundity of a haplo-diploid mite."J.Evolutionary Biolology. 13. 668-678 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Saito Y., K.Mori, A.R.Chittenden and Y.Sato: "Correspondence of male-to-male aggression to spatial distribution of individulas in field populations of a subsocial spider mite."J.Ethol.. 18. 79-83 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sato Y., Y.Saito and K.Mori: "Reproductive isolation between populations showing different aggression in a subsocial spider mite, Schiozotetranychus miscanthi Saito (Tetranychidae : Acari)."Applied Entomology Zoology. 35. 605-610 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sato Y., Y.Saito and K.Mori: "Patterns of reproductive isolation between two groups of Schizotetranychus miscanthi Saito (Tetra-nychidae : Acari) showing different male aggression traits."Applied Entomology Zoology. 35. 611-618 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Saito Y.: "Do kin selection and itra-sexual selection operate in spider mites?"Experimental and Applied Acarology. 24. 351-363 (2000)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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