クメ　マナブ   Manabu Kume   久米　学    所属   石巻専修大学  理工学部    職種   准教授
言語種別	英語
発行・発表の年月	2019
形態種別	研究論文（国際会議プロシーディングス）
査読	査読あり
標題	Diversity of gill raker number and diets among stickleback populations in novel habitats created by the 2011 Tōhoku earthquake and tsunami
執筆形態	未選択
掲載誌名	Evolutionary Ecology Research
巻・号・頁	20(1-3),pp.213-230
著者・共著者	Takuya Hosoki,Seiichi Mori,Shotaro Nishida,Manabu Kume,Tetsuya Sumi,Jun Kitano
概要	© 2019 Jun Kitano. Background: Catastrophic disasters often create novel habitats and offer an opportunity to investigate how rapidly phenotypic diversification occurs in nature. On 11 March 2011, a large earthquake and subsequent tsunami struck the downtown area of Otsuchi Town, Iwate Prefecture, Japan. This catastrophic event created new spring water-fed ponds that sticklebacks (genus Gasterosteus) quickly colonized. In 2014, there were 48 newly formed stickleback habitats. Questions: Does trophic morphology and ecology vary among stickleback populations in newly created ponds? Is the morphological variation associated with any ecological or environmental factors in the newly formed habitats? Methods: We sampled sticklebacks from four native and 17 novel habitats in 2014. We counted the number of gill rakers (an important trophic trait in fish) and analysed their stomach contents. We measured salinity, water temperature, pH, dissolved oxygen, and the density of benthos in the habitats and conducted principal component analysis on these environmental factors. Then, we tested whether any environmental factors or environmental principal components are associated with variation in gill raker number. Results: The number of gill rakers varied significantly among the newly formed populations. Fish with fewer gill rakers had a higher proportion of benthos in their stomach, suggesting that gill raker number may contribute to the performance of benthic feeding. Furthermore, we found that sticklebacks in habitats with higher benthos density had fewer gill rakers.
ISSN	1522-0613