Return-path: <firstname.lastname@example.org> Received: from whale.simmons.edu by VMSVAX.SIMMONS.EDU (PMDF V5.0-4 #8767) id <01I074Q13D9S8X2P1L@VMSVAX.SIMMONS.EDU> for whalenet@VMSVAX.SIMMONS.EDU; Fri, 19 Jan 1996 14:28:58 -0400 (EDT) Received: by whale.simmons.edu (4.1/SMI-4.1) id AA12513; Fri, 19 Jan 1996 14:28:27 -0500 (EST) Date: Fri, 19 Jan 1996 14:28:27 -0500 (EST) From: Michael Williamson <email@example.com> Subject: Info: ATOC/Scientists test safety of unde (fwd) To: WhaleNet <whalenet@VMSVAX.SIMMONS.EDU> Message-id: <Pine.SUN.3.91.960119142809.12308I-100000@WHALE.SIMMONS.EDU> MIME-version: 1.0 Content-type: TEXT/PLAIN; charset=US-ASCII Content-transfer-encoding: 7BIT ---------- Forwarded message ---------- Date: Fri, 19 Jan 96 12:38:00 UTC 0000 From: firstname.lastname@example.org To: email@example.com, firstname.lastname@example.org Subject: Scientists test safety of unde Scientists test safety of undersea sound experiment SAN FRANCISCO, Jan 17 (Reuter) - After several weeks of testing a controversial experiment to measure global warming by transmitting noises deep in the ocean, scientists said on Wednesday they have so far found no change in animal behaviour. Under a plan proposed by scientists at the University of California at San Diego's Scripps Institution of Oceanography, the low-frequency sounds would be picked up by receivers located around the Pacific Ocean, enabling them to detect long-term changes in ocean temperatures since sound travels faster in warmer water. After environmentalists voiced concern about the possible effect of the noise on whales, dolphins and other marine mammals, project scientists agreed to a preliminary study by independent marine biologists to test whether the signals would have any adverse impact on the animals. The researchers installed a loudspeaker deep in the Pacific Ocean off the central California coast and began the preliminary study in early December, occasionally broadcasting the low-pitched rumbles at 185 and 195 decibels. The marine biologists, headed by Dan Costa of the University of California at Santa Cruz, said on Wednesday that during the first five transmission cycles from the loudspeaker, they had observed no apparent changes in the behaviour of marine mammals in the area. But they said in a statement that more data would have to be collected and detailed analysis done before they could draw any definitive conclusions. During each transmission cycle, which lasted from one to four days, the sound source was turned on for 20 minutes every four hours, the scientists said. The scientists said they had spotted large numbers of whales, dolphins and other animals near the loudspeaker both when the loudspeaker was on and when it was silent. Initial data from 14 elephant seals, each carrying a satellite tag that tracks their position in the ocean, showed no dramatic changes in their migration route from Alaska to California waters, the scientists said. Some environmentalists had expressed concern that the noises could affect animals' migration patterns. The loudspeaker is located 50 miles (80 kms) offshore from Half Moon Bay and 3,200 ft (1,000 metres) under the ocean surface. The first phase of the experiment to test the impact on marine mammals will run at least through September 1996 when a decision will be taken on whether to go ahead with the global warming experiment, during which the loudspeaker will broadcast more regularly.