There are a couple of interesting whale stories in the news today.
For nearly nine years Cornell University researcher Christopher Clark -- together with former U.S. Navy acoustics experts Chuck Gagnon and Paula Loveday -- has been trying to answer these questions by listening to whale songs and calls in the North Atlantic using the navy's antisubmarine listening system. Instead of being used to track Soviet subs as they move through the Atlantic, the underwater microphones of the Sound Surveillance System (SOSUS) can track singing blue, fin, humpback and minke whales.
From the acoustical maps he and his colleagues have obtained, Clark has come to realize that he has been thinking about whales at the wrong time scale. "There is a time delay in the water, and the response times for their communication are not the same as ours. Suddenly you realize that their behavior is defined not by my scale, or any other whale researcher's scale, but by a whale's sense of scale -- ocean-basin sized," he says.
Fuller version here.
Whalemeat samples bought from a Japanese sushi market and analysed by scientists indicate that experts have seriously underestimated the size of the populations that roamed the seas before industrial-scale hunting began more than a century ago. The numbers of some species may have been 10 times greater than previously calculated.
Fuller version here.
For nearly nine years Cornell University researcher Christopher Clark -- together with former U.S. Navy acoustics experts Chuck Gagnon and Paula Loveday -- has been trying to answer these questions by listening to whale songs and calls in the North Atlantic using the navy's antisubmarine listening system. Instead of being used to track Soviet subs as they move through the Atlantic, the underwater microphones of the Sound Surveillance System (SOSUS) can track singing blue, fin, humpback and minke whales.
From the acoustical maps he and his colleagues have obtained, Clark has come to realize that he has been thinking about whales at the wrong time scale. "There is a time delay in the water, and the response times for their communication are not the same as ours. Suddenly you realize that their behavior is defined not by my scale, or any other whale researcher's scale, but by a whale's sense of scale -- ocean-basin sized," he says.
Fuller version here.
Whalemeat samples bought from a Japanese sushi market and analysed by scientists indicate that experts have seriously underestimated the size of the populations that roamed the seas before industrial-scale hunting began more than a century ago. The numbers of some species may have been 10 times greater than previously calculated.
Fuller version here.