期刊名称：Western Australia. Fisheries Department. Fisheries Research Reports
印刷版ISSN：1035-4549
出版年度：2008
卷号：173
出版社：Government of Western Australia / Department of Fisheries
摘要：¡°Savewave¡± acoustic pingers were trialed on one vessel to determine if they would deter
dolphins entering the trawl net. During daylight hours, the pingers were deployed on alternate
shots in the configuration recommended by the manufacturer. On the other alternate shots, no
pingers were deployed. A video camera in an underwater housing was attached to the headrope
facing downstream for 18 trawl shots. On the 14 shots where usable video footage was obtained
(11 with pingers deployed and 7 with pingers not deployed) the number of dolphins viewed
in the camera frame was counted for the 1.5 hours filming time, with no account being taken
for double counting. The results indicated there was no reduction in the numbers of dolphins
inside the net when pingers were deployed.
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