絶滅したはずのチョウザメが北海道で続々発見？？チョウザメの定着や繁殖について考察

Sturgeon, thought to be extinct, have appeared in the waters of northern Hokkaido? If you spot a sturgeon, please contact Arakawa. Professor Hagiwara's Twitter https://x.com/shagi1983?s=21&t=88cZ6Z... Sturgeon footage courtesy of Wani-san    • 庭に作った池で巨大チョウザメを飼育をします！   Please follow Arakawa on social media! Instagram→ https://instagram.com/arakawa455?igsh... TikTok → https://vt.tiktok.com/ZSeYWqH2V/ Twitter → https://twitter.com/turisaitama?s=2 About Citations and References Sturgeon Photo by Saeri https://x.com/samiryua?s=21&t=88cZ6ZM... About the Ainu and Sturgeon https://www.ff-ainu.or.jp/about/files... Niigata Prefectural Fisheries and Oceanography Research Institute, Fisheries and Research Information Catch of Daurian Sturgeon in Niigata https://www.pref.niigata.lg.jp/site/s... enkyu/mochikomi110407.html Shibetsu Salmon Museum https://shibetsusalmon.blogspot.com/2... Source: Hokkaido Regional Development Bureau website https://www.hkd.mlit.go.jp/ky/kn/kawa... Quote: Sturgeon allegedly caught https://www.instagram.com/p/C6AiyW3PE... Quote: Sturgeon swimming in a fishing port https://x.com/nisekometsa/status/1778... #ArakawaChannel #Rusty #Sturgeon #Extinct ※This video is not intended to infringe copyright, personal rights, or property rights. It is intended for research and reporting purposes, and all materials in the video fall under one of the following categories: Originally created by me "Use of an incidental covered work" under Article 30, Paragraph 2 of the Copyright Act "Quotation" under Article 32, Paragraph 1 of the Copyright Act "Use for reporting current events" under Article 41 of the Copyright Act "Use of a copyrighted work with permission" under Article 63 of the Copyright Act -----------------------------------------------------------------