BR-rss Archive
+3dB noise reduces ‘effective listening area’ 30%
Jim Cummings of the Acoustic Ecology Institute has posted another great synopsis of an important new bioacoustics paper that has big implications for southern resident killer whales. After defining a new bioacoustic metric “effective listening area” (which is MUCH more intuitive than “active space”), the authors clarify how slight increases in ambient noise can have [...]
Kalimari for orcas, or another salmon predator
Ron Hirschi, a local marine naturalist, is reporting Humbolt squid being caught on salmon gear in the central Strait of Juan de Fuca. Will they come all they way in in 2010? 11.30.09 Recreational salmon fishers are now catching them as far east as Sekiu in the Strait of Juan de Fuca. Watch for further [...]
Salmon court fallacy: we must spill or spew
There are some great observations and quotes in the liveblog of Matthey Preusch during the Nov 23, 2009, Salmon Court. This first one suggests a slight of hand or an ignorance of the primary findings of the Bright Future report — that we do not necessarily have to choose between spilling water for salmon in [...]
Orcas not in the NW Power Plan
Today’s the last day for killer whale advocates to ensure that the southern residents get some consideration in the power plan that guides the Pacific Northwest on a 20-year horizon and won’t be reviewed for 5 years. Currently, the complete plan PDF itself does not even include the words “orca” or “killer whale.” Clearly the [...]
The dawning era of dam breaching
This story makes it clear to me that Oregon is WAY ahead of Washington on dam removal. Whether it’s breaching of small dams like Savage Rapids or open discussion of lower Snake River Dam removal, Oregon is setting an inspirational pace in the 21st century. All this is coming from a region/State where the spotted [...]
Wireless buoys take pulse of the Salish Sea
I recently learned about a new initiative that is wirelessly networking environmental sensors on buoys around the Salish Sea. Developed by a wireless company called Intellicheck/Mobilisa in Port Townsend, most of the buoys provide real-time weather data, video, and/or surface water measurements. The NPB-1 buoy, however, offers real-time profile data from north-central Puget Sound (temperature, [...]
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