Acoustical deterrence of Silver Carp (Hypophthalmichthys molitrix)

Biological Invasions
University of Minnesota, Duluth
By: , and 

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Abstract

The invasive Silver Carp (Hypophthalmichthys molitrix) dominate large regions of the Mississippi River drainage and continue to expand their range northward threatening the Laurentian Great Lakes. This study found that complex broadband sound (0–10 kHz) is effective in altering the behavior of Silver Carp with implications for deterrent barriers or potential control measures (e.g., herding fish into nets). The phonotaxic response of Silver Carp was investigated using controlled experiments in outdoor concrete ponds (10 × 4.9 × 1.2 m). Pure tones (500–2000 Hz) and complex sound (underwater field recordings of outboard motors) were broadcast using underwater speakers. Silver Carp always reacted to the complex sounds by exhibiting negative phonotaxis to the sound source and by alternating speaker location, Silver Carp could be directed consistently, up to 37 consecutive times, to opposite ends of the large outdoor pond. However, fish habituated quickly to pure tones, reacting to only approximately 5 % of these presentations and never showed more than two consecutive responses. Previous studies have demonstrated the success of sound barriers in preventing Silver Carp movement using pure tones and this research suggests that a complex sound stimulus would be an even more effective deterrent.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Acoustical deterrence of Silver Carp (Hypophthalmichthys molitrix)
Series title Biological Invasions
DOI 10.1007/s10530-015-0964-6
Volume 17
Issue 12
Year Published 2015
Language English
Publisher Springer
Contributing office(s) Upper Midwest Environmental Sciences Center
Description 10 p.
First page 3383
Last page 3392
Country United States
Online Only (Y/N) N
Additional Online Files (Y/N) N