80 0 0 0 OA エゾリスの貯食行動とその回収行動の観察事例
- 著者
- 伊藤 萌林 佐鹿 万里子
- 出版者
- 日本哺乳類学会
- 雑誌
- 哺乳類科学 (ISSN:0385437X)
- 巻号頁・発行日
- vol.63, no.1, pp.103-108, 2023 (Released:2023-02-09)
- 参考文献数
- 26
北海道大学札幌キャンパス内に設置した自動撮影カメラによって,オニグルミJuglans mandshuricaの種子を地面に貯食し,それを積雪下から回収するエゾリスSciurus vulgaris orientisの行動を記録した.エゾリスは2021年12月16日に非積雪状態で貯食したオニグルミの種子を,23日後の2022年1月8日に21 cmの積雪下から回収した.本観察事例ではエゾリスは嗅覚や視覚記憶を使っておらず,エゾリスが貯食物の探索に空間的記憶を重視していることが示唆された.また,貯食行動から回収行動までの23日間にわたって,貯食場所を再確認することがなかったにも関わらず,迷うことなく貯食場所に到達したことは,エゾリスが精度の高い記憶能力を持つことを示唆する.
2 0 0 0 OA 三重・愛知・岐阜県境地域の言語使用と言語意識
- 著者
- 金谷 弦 多留 聖典 柚原 剛 海上 智央 三浦 収 中井 静子 伊藤 萌 鈴木 孝男
- 出版者
- 日本ベントス学会
- 雑誌
- 日本ベントス学会誌 (ISSN:1345112X)
- 巻号頁・発行日
- vol.73, no.2, pp.84-101, 2019-03-31 (Released:2019-05-22)
- 参考文献数
- 45
- 被引用文献数
- 3 2
To assess macrozoobenthic diversity and habitat conditions following the 2011 tsunamis, we conducted a series of field surveys in the Samegawa and Momiya River estuaries (Fukushima and Ibaraki Prefectures, respectively). We compared measured parameters with existing published datasets for 10 sites along the northeastern Honshu coast. Faunal diversity was higher at the Samegawa site (140 taxa in total, of which 31 were endangered and 51 were endemic; the faunal list included stenohaline marine taxa), likely because of the high habitat diversity at this location and seawater discharge from the thermal power plant. Cluster analysis differentiated distinct faunal community groupings associated with two habitat types: (i) marine-dominated sites, including the Samegawa Lagoon, Mangoku-ura, and Matsushima Bay and (ii) sites with riverine influence, including the mouths of the Samegawa and Momiya Rivers and brackish lagoons along Sendai Bay. The population size of the dominant mud snail Batillaria attramentaria in the Samegawa Lagoon declined steeply after the tsunamis but gradually recovered within five years. Microsatellite DNA analysis showed that the genetic diversity of this population did not significantly change following the tsunamis. After 2016, ongoing restoration work caused drastic habitat degradation at the Samegawa site, resulting in mass mortalities of polyhaline and stenohaline marine taxa and overall reductions in faunal diversity.
- 著者
- 森岡 千廣 北野 朋子 蔵本 成美 伊藤 萌夏
- 出版者
- 日本語教育方法研究会
- 雑誌
- 日本語教育方法研究会誌 (ISSN:18813968)
- 巻号頁・発行日
- vol.28, no.2, pp.22-23, 2022 (Released:2022-06-13)
- 参考文献数
- 2
The authors have conducted an activity aimed at creating a video for exchange students in a Japanese language school describing “life as exchange students in Japan.” The purpose of the video is to help with enhancing these exchange students’ language skills and intercultural awareness. The video also aims to encourage Japanese people with whom the video is shared to be interested in foreigners living in Japan. The creators were interviewed twice – once after editing the video, and again after receiving feedback from Japanese people who watched it. The results were that they felt a sense of achievement, especially regarding collaboration with classmates. They were also proud to see that Japanese viewers and exchange students had deepened their willingness to communicate with each other.
