详情

原文传递 Study Of Acoustic Asian Carp Deterrent Begins At Upper Mississippi River Lock 19

题名：	Study Of Acoustic Asian Carp Deterrent Begins At Upper Mississippi River Lock 19
正文语种：	eng
摘要：	Scientists, engineers and contractors were scheduled to begin installing a temporary, experimental underwater Acoustic Deterrent System, or uADS, at Mississippi River Lock and Dam 19 between Keokuk, Iowa, and Hamilton, Ill., on January 11, the U.S Geological Survey (USGS) announced. The construction is part of a study to understand how invasive Asian carp respond to acoustic, or sound, signals. Asian carp, including silver carp, big-head carp, black carp and grass carp, grow quickly and aggressively compete with native fish for food and habitat. According to Randy Hines, a biologist with the Upper Midwest Biological Sciences Center, the site was chosen for two reasons. Scientists already had a wealth of data on existing native fish stocks at the site; and it is the only lock and dam in the area through which carp can only pass through the lock gates. Like many fish species, Asian carp use navigation locks to bypass dams and move upstream in rivers for reproduction or to extend their range. At other locks and dams, carp can pass through the locks at low water, or over the tops of the dams at high water. Structures like Dam 19, over which fish cannot pass, force the fish to traverse the lock, making the navigation lock and its approach ideal areas to place control technologies to deter upstream fish movement. Lock 19 is a particularly useful test site because scientists previ- ously studied movements of native fish and Asian carp around and through the lock, Hines said.
出版年：	2021
期刊名称：	Waterways Journal
卷：	134
期：	42
页码：	19-19