2022 Fiscal Year Final Research Report
Assessing the risk of extinction in marine fish species through the monitoring of changes in the effective number of breeders
| Project/Area Number |
19K06206
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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 40030:Aquatic bioproduction science-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | 有効親個体数 / 海水魚 / 絶滅危惧種 |
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| Outline of Final Research Achievements |
In contrast to freshwater fishes, marine fishes commonly inhabit unrestricted habitats, making it difficult to quantitatively evaluate the risk of extinction through the observation of population declines over time. This could explain the limited progress in listing endangered species in marine fishes. In this study, we estimated effective number of breeders for multiple cohorts of several species from Ariake Sea, based on microsatellite DNA and genome-wide single nucleotide polymorphism analysis. Our objective was to ascertain the feasibility of assessing the risk of extinction by monitoring changes in the effective number of breeders.
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| Free Research Field |
魚類生態学
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| Academic Significance and Societal Importance of the Research Achievements |
海水魚では絶滅危険度の評価が難しく，現状では多くの種において検討が不十分と考えられるが，なかには水産重要種でありながら絶滅が懸念されるものも含まれている．万一実際に絶滅してしまった場合には，生物多様性のみならず水産業上の深刻なダメージともなるが，逆にむやみに絶滅危惧指定を行った場合にも水産業に支障が生じる可能性があるため，保全と水産業の両立のためには絶滅危険度の適切な評価が重要となる．本研究では複数年級群の稚魚について有効親個体数の推定を行い，その経年変化を絶滅危険度の評価に利用できる可能性を示した．
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