2023 Fiscal Year Final Research Report
Evaluation of factors determining reintroduced Oriental Stork survival and recruitment to the breeding populations
| Project/Area Number |
21K06351
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 45040:Ecology and environment-related
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| Research Institution | University of Hyogo |
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Principal Investigator |
Deguchi Tomohiro 兵庫県立大学, 地域資源マネジメント研究科, 准教授 (60414091)
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| Co-Investigator(Kenkyū-buntansha) |
大迫 義人 兵庫県立大学, 地域資源マネジメント研究科, 教授 (40326294)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 再導入 / コウノトリ / 生存率 / 繁殖率 / mtDNAハプロタイプ / 階層ベイズモデル |
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| Outline of Final Research Achievements |
Long-lived territorial bird populations are threatened by climate change and anthropogenic activities. Therefore, habitat restoration projects have been widely implemented. Conservation translocations have also been increasingly implemented. Adequate nonbreeder survival can be a key factor in the success of these attempts. The maintenance of breeding pair numbers is also influenced by the transition rate of nonbreeders to breeders. The reintroduction of Oriental Stork, a long-lived, territorial, endangered species, was initiated in Japan in 2005 using captive birds in hopes of increasing the population’s use of restored habitat. Our objective of this study was to elucidate the factors determining reintroduced stork survival and recruitment to the breeding populations. There was no significant difference in survival rate between nonbreeders and breeders. A low survival rate was detected for a specific mtDNA haplotype that accounts for the majority of the reintroduced population.
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| Free Research Field |
再導入生物学
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| Academic Significance and Societal Importance of the Research Achievements |
再導入や定着支援を長期的に成功させるためには、生息域内に放した個体のモニタリング結果を、域外保全にフィードバックすることが重要である。現在、コウノトリ再導入個体群は、生存率の低い特定のmtDNAハプロタイプを有する個体が多数派（50%以上）を占める奇妙な状況となっている。これは、野外に放つ個体が、これまで家系の多様性に基づいて選ばれており、ハプロタイプには注目してこなかったことが理由に挙げられる。今後、野外のコウノトリの加速的な回復を望む状況が生じた場合、このような遺伝形質による適応度の違いにも目を向けて、野外に放つ個体を選ぶ必要がある。
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