Fat
the only fuel for migrating salmon
A technician tests
a method for electrically checking the fat content of
a king salmon on a dead fish from the Yukon River.
Front Page Photo by Joe Margraf
Alaska: Fat
the only fuel for migrating salmon by NED ROZELL - As you
read this, salmon are darting through the deep blue ocean off
Alaska, eating everything they can catch. Some of those brilliant
silver fish are packing on fat to power them 1,500 miles up the
Yukon, past Eagle and well into Canada. They will not eat during
the journey.
"Fat is the gasoline in
their tank," said biologist Joe Margraf. "Migrating
salmon start their trip with that tank, and there's no refueling
along the way."
Margraf and other scientists
have been experimenting with a method to check the primary health
indicator of migrating salmon-the fat within their bodies-without
killing the fish. Margraf is a fisheries professor with the USGS
Alaska Cooperative Fish and Wildlife Research Unit at the University
of Alaska Fairbanks.
Salmon entering the Yukon River
begin their journeys to spawning grounds with huge fat reserves.
At the Yukon River's mouth, 20 percent of a fish's body weight
might be fat.
"(Fat) is what makes salmon
such an amazing food," Margraf said. "They have this
high percentage of fat, and it's all omega-3s, the good stuff."
Fish caught on the lower Yukon
are often dripping with fat even after people preserve them by
smoking. Fish upriver have lower percentages of fat, and as they
make it to their spawning grounds, water replaces most of the
fat within their cells. A test of spawning male chum salmon on
the Delta River showed that 75 percent of their body weight was
water after an 850-mile journey from the mouth of the Yukon.
- More...
Friday - April 28, 2006
Ketchikan: Ketchikan's
Unemployment rate falls to 8.5 percent in March - Ketchikan's
unemployment rate fell in March to 8.5 percent, down from 9.3
percent in February. The Alaska Department of Labor & Workforce
Development reported a labor force of 7, 109 for Ketchikan in
March. Of Ketchikan's labor force, 604 were reported as unemployed
in March.
Alaska's unemployment rate
fell five-tenths of a percentage point in March to 7.7 percent,
according to the Alaska Department of Labor & Workforce Development.
The March rate was two-tenths of a percentage point higher than
March 2005's rate of 7.5 percent, marking the first time in 24
months that the unemployment rate hasn't shown an over-the-year
decline.
According to the Alaska Department
of Labor, it will take several more months of data, however,
before any conclusions can be drawn about a change in the downward
trend of unemployment rates statewide. The statistics are in
large part based on a survey of only about 1,000 Alaska households
and are prone to considerable month-to-month variability. - More...
Friday - April 28, 2006
National: Drive
less? Politicians won't ask By MARC SANDALOW - The remedies
prescribed by the nation's political leaders this week in response
to $3-a-gallon gasoline might hold political value. But they
largely ignore the nation's addiction to oil, raising doubts
among economists that they will accomplish their goal.
Though everyone agrees that
the nation's economic well-being, its environmental health and
perhaps its national security depend on reducing its reliance
on foreign oil, the election-year rhetoric from Washington carefully
avoids any suggestion that Americans - who hold about 2 percent
of the world's known oil reserves and consume about 25 percent
- take any steps to cut back their use.
"We want fossil fuels.
We want oil. We want gas. We want nuclear. We want renewable.
We want wind," Sen. James Inhofe, R-Okla., declared Thursday,
reflecting the widely held belief that plentiful energy is an
American right. - More....
Friday - April 28, 2006
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