Can predator control help native fish?

From the FishBio blog:

Striped-bass-predation2“Even introduced, non-native fishes get their day on Capitol Hill. On June 3, the House of Representatives passed an amendment to the Commerce, Justice and Science Appropriation Act that requires consideration of predator control efforts in recovery plans for federal Endangered Species Act (ESA)-protected species. If this amendment passes the Senate, it could open up new avenues for handling introduced fish species that prey on protected salmonids and minnows in Sacramento-San Joaquin waterways. Striped, largemouth, and smallmouth bass and white and channel catfish are all non-native fishes that consume ESA-protected species in Sacramento-San Joaquin waterways (Nobriga and Feyrer 2007). Little is known about the abundances, distributions and predation rates for many of these non-native piscivores – but we do know that abundances and predation rates can be very high. In fact, scientists at the recent San Joaquin River Restoration Program Science Meeting reported that more than 20,000 non-native fish have been captured in fyke nets aimed to trap juvenile Chinook salmon during a two-year-old trap-and-transport program on the river. In one of their tagging studies, the group found the overwhelming majority of collected predators of sufficient size ate salmon, with up to six salmon in the stomachs of individual captured predators. … ”

Continue reading at the FishBio blog here:  Can predator control help native fish?

Leave a Reply

Your email address will not be published. Required fields are marked *