Evaluation of a broadband sound projected from the gates of a navigation lock in the Mississippi River shows it to be a weak deterrent for common carp and unable to block passage
A. Riesgraf, J. Finger, Daniel Zielinski, Clark Dennis III, J. Whitty, Peter Sorensen
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引用次数: 2
Abstract
There is an urgent need to block the passage of carp and other invasive fishes through navigational locks in large rivers. Although the broadband sound of an outboard motor has been shown to strongly repel three species of carp in laboratory flumes and to a lesser extent inside of a lock chamber, it has not yet been tested to determineif it can stop carp from entering a lock. To test this possibility, we attached speakers to lock gates and played the sound of an outboard motor while measuring its efficacy by tracking free-ranging transplanted tagged common carp in its vicinity. Eight groups of 20 carp were tested while the sound system was turned on and off for 2 week periods. When the sound system was on, these carp spent approximately one-third less time in front of the lock gates than when it was off; however, when analyzed by a GLMM this effect was shown to be no greater than the effects of river discharge or temperature. Additionally, lock entrance rates were lower, albeit non-significantly, when the sound was off. A number of factors may have contributed to the limited efficacy of this deterrent system including the sound itself.
期刊介绍:
Management of Biological Invasions, established in 2010 by Dr. Elias Dana, is an open access, peer-reviewed international journal focusing on applied research in biological invasions in aquatic and terrestrial ecosystems from around the world. This journal is devoted to bridging the gap between scientific research and the use of science in decision-making, regulation and management in the area of invasive species introduction and biodiversity conservation.
Managing biological invasions is a crisis science, with Management of Biological Invasions aiming to provide insights to the issues, to document new forms of detection, measurements and analysis, and to document tangible solutions to this problem.
In addition to original research on applied issues, Management of Biological Invasions publishes technical reports on new management technologies of invasive species and also the proceedings of relevant international meetings. As a platform to encourage informed discussion on matters of national and international importance, we publish viewpoint papers that highlight emerging issues, showcase initiatives, and present opinions of leading researchers.