My own experience is that younger Orcas seem to like a boat leaving it's sounder on as they cavort around-older ones just ignore the sound AFAICT.What about the every day sonar units recreational fishermen and guides use. I am aware the sonar the navy uses causes extreme harm to orcas.
I would also think that it would scare the crap out of the salmon too, no?? As the Orcas eat salmon quite a bit right?I believe that would be the Orca frequency!! I.e. the sound Orca's make in the water. I believe there is some posts about that elsewhere on this forum, where folks have tried playing Orca sounds through hydrophones into the water to scare seals and have had some success.........
Anyone know what frequency would drive the whiskered rock sausages NUTS? heh heh heh ;-)
I would also think that it would scare the crap out of the salmon too, no?? As the Orcas eat salmon quite a bit right?
Well the Southern residents eat salmon. But the Northern transients eat only marine mammals. Presumably these different pods will have different sound dialects. Therefore play the right sounds and maybe you can scare seals without affecting salmon (even assuming the salmon are as smart as seals and would recognise Orca sounds as a "danger signal" in the first place, which they might not).
Anyone know what frequency would drive the whiskered rock sausages NUTS? heh heh heh ;-)