Development of artificial insemination protocol in bear species: Theriogenological support in zoo animals.

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K06415
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 42020:Veterinary medical science-related
• Research Institution: Hokkaido University
• Principal Investigator: Yanagawa Yojiro 北海道大学, 獣医学研究院, 助教 (20609656)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: ホッキョクグマ / ヒグマ / 動物園 / 人工授精

Outline of Final Research Achievements

To enhance captive breeding in polar bears and brown bears, we established spermatogenesis index in males and elucidated follicular development pattern and estrus type in females. Also we determined tools and methods after detail examination of female reproductive organs, and developed ovulation induction method. Further, genetic examination in peripheral blood was suggested as marker for pregnancy during delayed implantation. In addition, I spread and shared theriogenological approach for zoo animal during collaboration with several zoo.

Free Research Field

繁殖学

Academic Significance and Societal Importance of the Research Achievements

クマ科の多くが絶滅危惧種であり、人工授精が可能となれば個体数を増やすことのみならず、これまで産子を得ることがなかった個体を繁殖計画に供することができ遺伝的多様性の維持へも寄与できる。またホッキョクグマは地球温暖化の影響による絶滅危惧種としても注目されているため、本研究が動物園および野外における保全に与える影響は大きく、臨床繁殖学的支援を受け入れる素地を作ることが可能である。