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Population divergence by local adaptation to acoustic environments in the Ruddy Kingfisher (Halcyon coromanda)
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| Title: | Population divergence by local adaptation to acoustic environments in the Ruddy Kingfisher (Halcyon coromanda) |
| Other Titles: | アカショウビンにおける音響環境への局所適応がもたらす集団の分化に関する研究 |
| Authors: | 植村, 慎吾1 Browse this author |
| Authors(alt): | Uemura, Shingo1 |
| Issue Date: | 25-Sep-2020 |
| Publisher: | Hokkaido University |
| Abstract: | Differing quality and quantity of available resources among habitats, causes differentiation in mating signals. The acoustic environment is one such resource, and it can readily be divided by frequency (Hz). Among avian species that learn their calls, there are many examples showing that the characteristics of calls diverge in relation to the gradient or variance in the acoustic environment, such as the amplitude of environmental noise and sound attenuation, even among adjacent regions. In this study, we targeted a species that does not learn its calls, but inherits them. In such a species, adapting to the local acoustic environment may cause isolation among populations and eventually lead to speciation. Here we show that the differences between the acoustic environments of adjacent islands may cause pre-mating isolation in the Ruddy Kingfisher. We investigated differences in the characteristics of this migratory kingfisher’s innate calls among populations in the Ryukyu Archipelago. Their innate calls parallel their genetic structure. The kingfisher seems to avoid the loud environmental noise caused by cicadas. In addition, a playback experiment revealed that assortative mating might be occurring. Our results show that even nearby populations of birds that have flight capability may speciate due to acoustical adaptation. |
| Conffering University: | 北海道大学 |
| Degree Report Number: | 甲第14198号 |
| Degree Level: | 博士 |
| Degree Discipline: | 理学 |
| Examination Committee Members: | (主査) 教授 髙木 昌興, 教授 増田 隆一, 准教授 江田 真毅（総合博物館） |
| Degree Affiliation: | 理学院（自然史科学専攻） |
| Type: | theses (doctoral) |
| URI: | http://hdl.handle.net/2115/82613 |
| Appears in Collections: | 課程博士 (Doctorate by way of Advanced Course) > 理学院(Graduate School of Science)
学位論文 (Theses) > 博士 （理学）
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