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Dolphin Acoustic Deterrants tested in Shannon estuary
The SDWF have just completed successful field trials on a new acoustic deterrant, developed by BIM to deter dolphins from trawl nets.
These trials were carried out over a three week period on behalf of Galway-Mayo Institute of Technology and with partners from University College, Dublin, University of Bangor, Wales and the Agricultural University in Krakov, Poland.
The trials were designed to test the effect of dolphins to two types of pingers. One produces a regular sound at 165db and at 50-70KHz while the new pinger only produces this sound when a dolphin echolocates on the device. The range is limited and the effect short lived so no long term inpact on the dolphins or there use of the estuary is expected.
These trials were carried out at the SDWF Centre in Kilrush and have been lauded as the most extensive field programme carried out by the SDWF since it was formed in 2000. These trials were carried out with permission from the National Parks and Wildlife Service.
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