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Latest fish diseases Stories

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2009-03-02 08:57:48

Survey of non-indigenous species finds they may outrank established dangers Many native fishes in the Pacific Northwest are threatened or endangered, notably salmonids, and hundreds of millions of dollars are expended annually on researching their populations and on amelioration efforts. Most of the attention and funding have been directed toward to the impacts of habitat alteration, hatcheries, harvest, and the hydrosystem"”the "all H's." A study published in the March 2009 issue of...

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2008-06-19 00:10:00

CHICAGO -- When thousands of bloody, hemorrhaging fish recently turned up on the Lake Michigan shore south of Milwaukee, it confirmed the worst fears of scientists worried that an Ebola-like virus stalking Great Lakes fish would strike closer to Chicago. The dead fish were round gobies, a small invasive species that many feel is better off dead. But unlike many other diseases that tend to hit one or two types of fish, this viral strain has led to large fish kills involving more than 30...

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2007-12-13 16:05:00

Researchers have new evidence that as the density of salmon farms increases, they can drive nearby wild salmon runs to extinction. The problem is sea lice, a natural parasite that normally attaches to adult salmon with little ill effect and has little contact with vulnerable juvenile salmon. All that changes, however, when fish farms move in. A study in the journal Science to be published Friday shows that sea lice infestations around salmon farms in British Columbia's Broughton Archipelago...

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2007-01-11 13:15:00

WASHINGTON (AP) - After more than seven years of study scientists have isolated a toxin that they say may have killed millions of fish along the East Coast in the 1990s. The fish kills were associated with a parasitic algae called Pfiesteria, but until now researchers have been unable to determine how the organism killed the fish. Peter Moeller, a chemist with the National Oceanic and Atmospheric Administration, said Thursday that he was able to isolate a toxin from Pfiesteria, but that the...

2006-06-23 08:45:00

By James Kilner STAVANGER, Norway -- From a large, sparsely decorated office overlooking a warehouse and a busy main road, Atle Eide controls a quarter of the world's salmon production. Just 20 years ago, fish farming was a family-run industry confined to the windswept Scottish and Norwegian coasts. Now it is a multibillion dollar business spanning the globe and, after a series of takeovers, it has a true market leader -- Norway's Pan Fish. "It's one of the most fascinating industries in the...

2006-04-24 19:06:36

SALT LAKE CITY -- A disease that can deform trout, cause them to chase their own tail and eventually lead to their starvation will get special attention this year from legislators, who want to try to reduce its effects on commercial and recreational fisheries. More than a dozen private fish hatcheries have tested positive for whirling disease in Utah since 1991, causing multiple commercial trout facilities to either shut down or be quarantined at a cost of millions of dollars to the...

2005-06-22 11:40:00

CORVALLIS, Ore. "“ Researchers have discovered that a parasite carried by an invasive species of minnow is responsible for the dramatic declines and localized extinctions of a different minnow species in Europe during the past 40 years. This parasite, which scientists have found can almost totally destroy the spawning success of the small sunbleak minnow, Leucaspius delineatus, may pose threats to the diversity and stability of freshwater ecosystems, and is genetically very similar to a...

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2004-12-03 07:25:02

PORTLAND, Ore. (AP) -- A new test could help scientists determine more quickly whether chinook salmon in the Klamath River are infected with a potentially deadly parasite. Previously, it took months to determine if the salmon contained the parasite Ceratomyxa shasta. The parasite infests and eats the lining of fish intestines. The new test, developed by researchers at Oregon State University, uses DNA sequencing to identify the parasite within hours. It can be used to find the parasite in...