| 要旨トップ | ESJ73 シンポジウム 一覧 | | 日本生態学会第73回全国大会 (2026年3月、京都) 講演要旨 ESJ73 Abstract

シンポジウム S25 3月13日 14:00-17:00 Room C: 京大4号21

#### 外来魚問題：近年の取り組みとマネージメント課題
Invasive freshwater fish in Japan: Current trends and management perspectives

ピーターソンマイルズ（富山大学）
Miles Isao PETERSON（University of Toyama）

Japan has a long history of productive freshwater fisheries that have been sustained by ample native fish stocks. However, many non-native fish species have been introduced, mainly for food supply and recreational opportunities, and are causing issues related to the decline of native species. These invasive fish species range from Largemouth and Smallmouth bass, Bluegill, Carp, salmonids such as Brown trout, Rainbow trout, Lake charr and Brook charr, as well as a host of cyprinids. The impacts of these species also vary based on habitat and species assemblage, but the direct predation of native species, for example Smallmouth bass predation of native stream fishes such as Ayu and Japanese Dace, tend to be highlighted. This symposium brings together a wide range of fisheries biologists and professionals to explore the recent trends in the distribution and effects of these invasive freshwater fish. Our speakers range from seasoned veteran government fisheries managers and professors to young researchers. We will attempt to not only explore the prevalent management techniques currently used in Japan, mainly targeted removal of invasive fish, but will also focus on emerging methods and strategies to enhance native species survival even when a complete removal of the invasive species is not possible. We will also focus on lesser-known invasive fish issues, such as domestic non-native introductions of popular game-species such as Masu salmon and White-spotted charr. A special focus will be placed not only on the research and management aspects of these issues, but also on the community education and involvement that is crucial for their long-term success. This symposium will predominantly focus on the management of invasive freshwater fish in Japan but will also reference historical and emerging practices in other areas, especially North America, and Europe which have a long history of invasive fish management. We hope that through examining past successes and failures in invasive fish management; while exploring emerging methods currently being used globally, we can provide insights into how to best tackle these issues going forward.
* This symposium will be conducted predominantly in Japanese
*本シンポジウムは主に日本語で開催されます

[S25-1]
コクチバス：近年のトレンドと対策 *Miles Isao PETERSON（University of Toyama）
Smallmouth bass in Japan: Recent trends and management *Miles Isao PETERSON（University of Toyama）

[S25-2]
金原ダム湖におけるオオクチバスの機能的根絶 *坪井潤一（水研機構）, 片野修（水研機構）, 水本寛基（水研機構）, 荒木仁志（北海道大学）
Functional eradication of largemouth bass in a dam reservoir *Jun-ichi TSUBOI（FRA）, Osamu KATANO（FRA）, Hiroki MIZUMOTO（FRA）, Hitoshi ARAKI（Hokkaido University）

[S25-3]
四国の在来アマゴ分布域における外来イワナの定着 *東垣大祐（道総研）
Settlement of introduced white-spotted charr in headwater reaches dominated by native red-spotted masu salmon in Shikoku Island *Daisuke TOGAKI（HRO）

[S25-4]
大出水を契機に激減した千曲川本流のコクチバス *北野聡（諏訪湖環境研究セ）, 松永寛之（筑波大学）, Miles Isao PETERSON（University of Toyama）
Drastic decline of the smallmouth bass population by a huge flood event in the Chikuma River *Satoshi KITANO（Lake Suwa Env. Res. Center）, Hiroyuki MATSUNAGA（University of Tsukuba）, Miles Isao PETERSON（University of Toyama）

[S25-5]
国内外来魚問題の解決に向けて：札幌市を流れる琴似発寒川のサクラマスでの取り組み *長谷川功（水研機構）, 渡辺恵三（北海道技術コンサ）, 中村慎吾（札幌市さけ科学館）, 佐橋玄記（水研機構）
Toward the solution for domestic nonnative fish problems: A case study of masu salmon in Kotonihassamu stream, Sapporo *Koh HASEGAWA（FRA）, Keizo WATANABE（Hokkaido Gijutsu Con. INC）, Shingo NAKAMURA（Sapporo Salmon Museum）, Genki SAHASHI（FRA）

[S25-6]
外来生物法に基づいたわが国の外来種対策：淡水魚類をめぐる経緯・現状と課題 *中井克樹（ルイ・パストゥール医）
Invasive species management in Japan based on Invasive Alien Species Act: historical review and present issues concerning freshwater fish *Katsuki NAKAI（Louis Pasteur C. for M. R.）

日本生態学会