Latest fish diseases Stories
Norwegian salmon is a popular holiday treat for many, but the fish is threatened by a small parasite that is spreading quickly among wild and farmed salmon.
Entire populations of North American fish already are being affected by several emerging diseases, a problem that threatens to increase in the future with climate change and other stresses on aquatic ecosystems, according to a noted U.S. Geological Survey researcher giving an invited talk on this subject today at the Wildlife Disease Association conference in Blaine, Wash.
Researchers funded by the Biotechnology and Biological Sciences Research Council (BBSRC) have gained a key insight into a disease that is devastating the UK's fish farming industry.
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.
Scientists are worried that as the disease continues to spread, infected fish might end up swimming into the Chicago River system, which links the Great Lakes to the Mississippi River and the nation's vast middle section.
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.
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.
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.
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.
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.
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