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Involvement of thuroid gland on the seasonal breeding of Japanese monkeys

Research Project

Project/Area Number 04640688
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 動物形態・分類学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

NOZAKI Masumi  Primate Res.Inst.Kyoto Univ.Assistant professor, 霊長類研究所, 助手 (70136232)

Co-Investigator(Kenkyū-buntansha) SHIMIZU Keiko  Primate Res.Inst.Kyoto Univ.Technicians, 霊長類研究所, 教務職員 (90135616)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1993: ¥600,000 (Direct Cost: ¥600,000)
KeywordsJapanese monkeys / Seasonal breeding / Menstrual cycle / Thyroid gland / Thyroxine / Primates / Photoreflactoriness / プロラクチン分泌 / 甲状腺ホルモン / ゴナドトロピン / プロラクチン / 甲状腺摘除
Research Abstract

To examine the role of thyroid hormones on the seasonal breeding of Japanese monkeys (Macaca fuscata), sexually mature females were thyroidectomized (n=6) in early December, during the mid-breeding season, or they remained thyroid intact (n=4). They were housed indoors individually, and blood samples were collected three times a week to monitor gonadotropin and gonadal hormone secretions. All animals ovulated during the breeding season before operation. Thyroidectomy resulted in earlier termination of the breeding season in all animals : ovulatory cycles of thyroidectomized animals were terminated soon after thyroidectomy. Thyroidectomized animals exhibited significantly higher levels of plasma prolactin than those of controls. These results suggest that thyroid hormones are involved in the regulation of the seasonal breeding of Japanese monkeys at least by mediating the modification of prolactin secretion.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] 野崎真澄: "ニホンザルの繁殖特性" J.Reprod.Develop.39. j93-j107 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Masumi Nozaki: "Effects of thyroidectomy on seasonal breeding of Japanese monkeys" Zool.Sci.9. 1265 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Masumi Nozaki: "Reproductive characteristics of Japanese monkeys" J.Reprod.Develop.39. j93-j107 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Masumi Nozaki: "Effects of thyroidectomy on seasonal breeding of Japanese monkeys" Zoological Sci.9. 1265 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 野崎眞澄: "ニホンザルの繁殖特性" J.Reprod.Develop.39. j93-j107 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Nozaki: "Effects of thyroidectomy on seasonal breeding of Japanese monkeys" Zool.Sci.9. 1265 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Nozaki,K.Shimizu and F.Mitsunaga: "Effects of thyroidectomy on seasonal breeding of Japanese monlceys" Zoological Science. 9. 1265-1265 (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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