ハセガワ　ナオヒロ   HASEGAWA Naohiro   長谷川　尚弘    所属   広島修道大学  人間環境学部    職種   助教
言語種別	英語
発行・発表の年月	2020/11
形態種別	学術論文
査読	査読有り
標題	Phylogenetic comparison of egg transparency in ascidians by hyperspectral imaging
執筆形態	共著
掲載誌名	Scientific Report
掲載区分	国外
出版社・発行元	Nature research
巻・号・頁	10,pp.1-5
頁数	5
担当範囲	材料であるホヤ類の採集を共著者とともに行い、ホヤ類の一部を形態学と分子系統解析を用いて種同定した。また、分子系統解析によって、解析に用いられたホヤ類の進化の過程を推測した。論文原稿においては、系統解析に関わる部分を執筆した。
著者・共著者	◎Takumi T.Shito, Naohiro Hasegawa, Kotaro Oka, Kohji Hotta
概要	Transparent bodies are found across diverse taxa, yet how transparency has been evolutionarily acquired and by what molecular mechanisms it is maintained remain unclear. In this study, we focused on ascidian eggs to investigate the transparency of marine invertebrates. We isolated eggs from 21 individuals out of 99 ascidian specimens collected in Japan. The transparency spectra (380–1000 nm) of these eggs were measured using a hyperspectral camera, and changes in egg transparency during evolution were examined through molecular phylogenetic analysis. Our results showed that eggs of the family Ascidiidae have retained high transparency. Notably, eggs of Ascidia aspersa exhibited 90% transparency—comparable to window glass—and this transparency was maintained even during larval development. Such a high degree of transparency may serve to deceive predators. 担当部分：1, 2, 6, 9, 10頁