Lock 19 underwater acoustic deterrent system study—Interim project update, through 2022

First posted August 11, 2023 For additional information, contact: Director, Upper Midwest Environmental Sciences CenterU.S. Geological Survey2630 Fanta Reed RoadLa Crosse, Wisconsin 54603Contact Pubs Warehouse Invasive carp (Hypophthalmichthys nobilis [Richardson, 1845; Bighead Carp], H. molitrix [Valenciennes in Cuvier and Valenciennes, 1844; Silver Ctenopharyngodon idella Grass Mylopharyngodon piceus 1846; Black Carp]) expansion threatens the Laurentian Great Lakes other major waterways. Numerous tools techniques are being tested or developed to curtail upstream of invasive carps while minimizing effect native species. Underwater sound is one technology that has shown promise as a deterrent laboratory ponds considered for use at bottleneck locks dams reduce risk moving uninvaded areas. To test this management-relevant scale, an underwater acoustic system (UADS) was designed installed Lock 19 on Mississippi River 2021. The experimental UADS operates continuous schedule 80 hours off allow comparisons fish behavior during varying environmental, operational, navigation traffic conditions. Two telemetry systems, operating 69 307 kilohertz, were deployed evaluate how may affect movement During 2021–22, Carp twice likely pass over into lock when it compared on; however, Bigmouth Buffalo, fish, 1.2 times more make passage on.