What are the effect of pingers on cetaceans when approaching gill nets ?
How do they deter cetaceans ?
I'm not familiar with the scientific literature on pingers so I can't give
a technical answer, but the theory and practice seems to be that the sounds
become associated with the nets, thus the cetaceans soon learn that when
they hear those sounds they should be on the lookout for nets. Sounds
travel great distances in water and cetaceans are highly sensitive to
sound, whereas the visual sight of the nets could easily be missed until
too late, after the animals are tangled in them.
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