New tactic to move whales: Shoot water at them
By Todd Milbourn - Bee Staff Writer
Last Updated 10:15 am PDT Friday, May 25, 2007
The whale rescuers are trying a new tact to get Delta and Dawn moving toward the ocean.
In a morning press conference at U.S. Coast Guard headquarters in Rio Vista, officials said they will shoot water from a fire hose toward the whales in hopes that the bubbles or changes in water pressures prompts them to swim downstream.
"We don't know if it is going to work. One thing we heard from the public, is that we need to experiment and try new things. This is definitely a new thing," said Greg Hurner with the California Department of Fish and Game.
The humpback whales are swimming near the Ryer Island ferry in the same vicinity where they have been in recent days.
Scientists said they continue to be concerned about the whales' wounds and deterioration of their skin in the fresh water of the Sacramento River delta.
A flotilla of four U.S. Coast Guard boats will stay close to the pair over the Memorial Day weekend, rigorously enforcing a 500-yard boat-free zone around the whales. The Coast Guard advises slowing down to "no-wake speed" when boaters are anywhere near the huge mammals.
"You'll be able to recognize us -- stay clear!" said Coast Guard Ensign Brian Trapp, adding that violators could face prosecution under the Endangered Species Act or the Marine Mammal Protection Act.
Adding to the river congestion will be several hundred boats heading for Sacramento's Jazz Jubilee.

Trapp said recreational boaters can tune into marine radio Channels 16 and 22A, which will broadcast updates on the whales' location on the hour.
Frances Gulland, lead veterinarian in the rescue effort, said the anticipated weekend boat traffic is a concern for scientists trying to head the whales back to the Pacific.
"I would love it if no one were on the water at all, but we're realistic," she said at a news briefing Thursday.
The mother and her calf had a peaceful day Thursday after scientists decided to halt temporarily their attempts to point the mammals in the right direction.
Gulland reported that they stayed in a three-mile stretch of the Delta, between Cache Creek and Marker 43 in the Deep Water Shipping Channel.
Excerpt from: SacBee