Catch and efforts in eradication program of largemouth bass (Micropterus nigricans) in Kanabara Dam Lake, Nagano Prefecture, Japan

Catch and efforts in eradication program of largemouth bass (Micropterus nigricans) in Kanabara Dam Lake, Nagano Prefecture, Japan. Operating since 2007, the program includes the removal of spawning beds via snorkelling; removal of larvae and fry through scooping; and capture of immature and adult fish via net traps, cast nets, gill nets, fishing, and spear guns, and by hand. The M. nigricans population was monitored via snorkelling and environmental DNA analysis. Net traps were effective for capturing smaller fish, whereas 3-meter-long gill nets and spear guns were effective for larger fish.

自2007年起，在日本长野县轻井泽湖地区展开的大口黑鲈（Micropterus nigricans）灭绝计划中，实施了捕捉与努力措施。该计划包括通过潜水清除产卵场；通过捞取清除鱼苗和幼鱼；以及通过网捕、抛网、刺网、钓鱼、鱼叉枪和徒手捕捉未成熟和成年的鱼类。通过潜水监测和环境DNA分析对M. nigricans种群进行监控。网捕对捕捉较小的鱼类有效，而3米长的刺网和鱼叉枪则对捕捉较大鱼类效果显著。