Ker Than
for National Geographic News
Published May 3, 2011
When giant squid were found dead off Spain about a decade ago, scientists suspected that powerful sound pulses from ships had harmed the animals. Now the evidence may be in.
A new study says low-frequency sounds from human activities can affect squid and other cephalopods, not just whales and other marine mammals, which have long been thought to be vulnerable to such pulses. (See "U.S. Navy Sonar May Harm Killer Whales, Expert Says.")
The finding suggests noise pollution in the ocean is having a much broader effect on marine life than previously thought, said study leader Michel André, a marine bioacoustician at Barcelona's Technical University of Catalonia.
"We know that noise pollution in the oceans has a significant impact on dolphins and whales
. ... but this is the first study indicating a severe impact on invertebrates, an extended group of marine species that are not known to rely on sound for living," André said in a statement.
more
http://news.nationalgeographic.com/news/2011/05/110503-giant-squid-octopus-sonar-acoustic-tests-science-whales-sound/