12 Apr '11, 10pm

Now It's Octopus and Squid

One concern we’ve frequently voiced about ocean noise pollution is the potential for impacts across a wide range of species, up and down the food chain. A new study in Frontiers in Ecology gives yet more reason for serious worry. A group of Spanish researchers exposed four species of squid, octopus, and cuttlefish to moderate levels of low-frequency, underwater sound for two hours. What they found in all of the animals was massive trauma “not compatible with life.” Most of the damage occurred within the statocysts, a group of small air sacs around the animals’ head that helps them balance and orient themselves in the water. Over the course of two hours sensitive hair cells were destroyed, nerve fibers swelled and degenerated, sac linings were pocked with holes. At first the captive animals tried to escape; then they froze in their tanks. The damage is analogous to someone ...

Full article: http://switchboard.nrdc.org/blogs/mjasny/now_its_octopus_...

Tweets

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grist.org 13 Apr '11, 9pm

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