Echoing porpoise clicks as an alert
Extract from http://tinyurl.com/3ye7jp :
The PPD alerts porpoises to the presence of fishing nets using resonant acoustic reflectors that increase the net’s “acoustic visibility”, and do so in a less complicated way than the currently used pingers.
When a porpoise emits a click, the reflectors transmit back a stronger echo, making the reflectors appear to the porpoise to be much larger objects than they are, and thus alerting them to danger.
posted by serge at 9/09/2008 06:51:00 PM
3 Comments:
Hey Serge,
I like your blog and I applaud your efforts on behalf of whales and dolphins. In a similar vein, I believe that public interest and concern for these magnificent beings can be heightened by blending scientific fact with speculative fiction as I have done in my newest book, The Tempest's Roar. Please visit my website www.rarclouston.com or read my blog http://whaleanddolphintalk.blogspot.com/
Bob
P.S. I grew up in Montreal.
Thanks for the comment, R. I will visit your site, blog, and your books. I agree that fiction is a great tool, particularly because so little info is provided these days by scientists.
Some of the interactions that I had with dolphins and whales were possibly more fantastic than most speculations. The truth may be stranger than fiction in the case of whales and dolphins. But we need science for the truth.
Regards,
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