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Salmon in Biological News

Technology improves salmon passage at hydropower dams

SPOKANE, Wash. - Acoustic tags and numerical river models are two technologies developed by researchers at the Department of Energy's Pacific Northwest National Laboratory that are helping improve salmon passage at the Columbia Basin's hydroelectric dams. PNNL researchers will discuss these tech...

Hatchery fish may hurt efforts to sustain wild salmon runs

CORVALLIS, Ore. Steelhead trout that are originally bred in hatcheries are so genetically impaired that, even if they survive and reproduce in the wild, their offspring will also be significantly less successful at reproducing, according to a new study published today by researchers from Oregon S...

Invasives threaten salmon in Pacific Northwest

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...

Transporting juvenile salmon hinders adult migration

Scientists have discovered that management efforts intended to assist migrations of salmon and steelhead trout can have unintended consequences for fish populations. Juveniles that are transported downstream on boats can lose the ability to migrate back to their breeding grounds, reducing their su...

UBC study establishes formula for predicting climate change impact on salmon stocks

University of British Columbia researchers have found a way to accurately predict the impact of climate change on imperilled Pacific salmon stocks that could result in better management strategies. The findings, among the first to quantify a relationship between river temperature and salmon mo...

Scientists achieve first tracking of salmon from headwaters in Rockies through Pacific to Alaska

Scientists have proven new miniature tagging and tracking technologies can follow the travels of small salmon through vast distances and highly dissimilar waters - from as far as the Rocky Mountain headwaters of USA's Columbia River through the ocean to the coast of Alaska. And, experts say, th...

Research challenges conventional notions about salmon survival

In a paper published in the open access journal PLoS Biology, researchers used new tagging and tracking technologies to show the surprising result that the survival of juvenile salmon in two major west coast rivers was similar, despite the presence of an extensive network of dams in one river s...

Similar survival rates for Pacific salmon in Fraser, Columbia Rivers raises new questions

Canadian and U.S. researchers have made a surprising discovery that some endangered Pacific salmon stocks are surviving in rivers with hydroelectric dams as well as or better than in rivers without dams. This is the first study of its kind and is carried out by an international team of scienti...

Signals from the Atlantic salmon highway

For years scientists have struggled to understand the decline and slow recovery of Atlantic salmon, a once abundant and highly prized game and food fish native to New England rivers. Biologists agree that poor marine survival is affecting salmon in the U.S. and Canada, but specific causes are diff...

Hatchery fish outnumber wild chinook salmon in troubled fall run

SANTA CRUZ, CA--A recent study indicates that wild salmon may account for just 10 percent of California's fall-run chinook salmon population, while the vast majority of the fish come from hatcheries. The findings are especially troubling in light of the disastrous decline in the population this ye...

Unfavorable ocean conditions likely cause of low 2007 salmon returns along West Coast

NOAA scientists are reviewing unusual environmental conditions in the Pacific Ocean as the likely culprit for the dramatically low returns of Chinook and coho salmon to rivers and streams along the West Coast of the United States in 2007. Researchers from NOAAs Northwest and Southwest Fisheries...

Fish farms drive wild salmon populations toward extinction

A study appearing in the December 14 issue of the journal Science shows, for the first time, that parasitic sea lice infestations caused by salmon farms are driving nearby populations of wild salmon toward extinction. The results show that the affected pink salmon populations have been rapidly dec...

Wolves would rather eat salmon

Although most people imagine wolves chasing deer and other hoofed animals, new research suggests that, when they can, wolves actually prefer fishing to hunting. The study, published today in the open access journal BMC Ecology, shows that when salmon is available, wolves will reduce deer hunting...

UW launches cutting-edge DNA 'fin-printing' project for salmon

Some salmon make one heck of a commute. The record holder in the Pacific Northwest, for example, is a steelhead that was tagged in the Clearwater River, Idaho, in April 2003. A year and a half later, it was caught off the southern Kuril Islands near Japan. The most direct route between those two...

New paper examines dams' effects on California salmon

DURHAM, N.C. -- Spring-run Chinook salmon and other fish in the rivers of Californias Central Valley could be harmed by more water-storage dams, according to researchers at Duke University and the National Oceanic and Atmospheric Administration. The findings of a recent paper may serve as a cau...

New report: Explosive growth changes salmon industry

A new report, the first to take a comprehensive look at market competition between wild and farmed salmon, sheds new light on the contentious and complex issues surrounding farmed and wild salmon. The Great Salmon Run: Competition Between Wild and Farmed Salmon, released by TRAFFIC, the wildlife...

Farmed salmon could become an invasive species in forest streams

Ever since the Norwegians expanded commercial farming of salmon in the 1960s, the industry has continued to rapidly grow worldwide. It has expanded to such a degree that prices for farmed salmon have plummeted and, there is concern that farmed fish may become the next invasive species. "Farmed f...

Special chip provides better picture of salmon health

How do you tell if a fish is fit and well? This is a question which has troubled farmers and biologists for years, but now scientists may have come up with the answer - using DNA chips. By studying the genes of Atlantic salmon scientists from three UK universities are developing a DNA chip to monit...

Leave it to salmon to leave no stone unturned

Like an armada of small rototillers, female salmon can industriously churn up entire stream beds from end to end, sometimes more than once, using just their tails. For decades ecologists have believed that salmon nest-digging triggered only local effects. But a University of Washington researcher...

Escapee farmed salmon infiltrate fitter wild populations

There is growing concern about the threats that farmed Atlantic salmon escapees constitute to wild salmon populations. Consumers and environmentalists are concerned about farmed salmon yet heritable changes that have accumulated in farmed strains at the genetic level are largely unknown. In ne...

To sea or not to sea: When it comes to salmon sex, size sometimes doesn't matter

The ones that stay and the ones that stray are biological puzzles among Pacific salmon, of whom the vast majority ?but not all ?travel thousands of miles to sea and back to the streams where they hatched. There are chinook salmon populations in Idaho in which an occasional male stays put and matu...

Alaskan puzzles, monitoring provide insight about North Pacific salmon runs

The University of Washington Alaska Salmon Program, the world's longest-running effort to monitor salmon and their ecosystems, has received nearly $2.4 million from the Gordon and Betty Moore Foundation to expand its sampling scope and sophistication. The Alaska-based program has applications for...

Researchers reveal the infectious impact of salmon farms on wild salmon

A new study published in the March 30th edition of the prestigious scientific journal Proceedings of the Royal Society B (a publication of the UK's national academy of science) shows that the transfer of parasitic sea lice from salmon farms to wild salmon populations is much larger and more extensi...

Omega-3 fatty acids appear to impact AMD progression

... BOSTON (June 18, 2009) - Omega-3 fatty acids found in fatty fish such as tuna and salmon may protect against progression of age-related macular degeneration (AMD), but the benefits appear to depend on the stage of disease and whether certa...

Eating fatty fish once a week reduces men's risk of heart failure

... BOSTON Eating salmon or other fatty fish just once a week helped reduce men's risk of heart failure, adding to growing evidence that omega-3 fatty acids are of benefit to ...

New tracking tags are providing fish-eye views of ways to manage depressed fisheries

...Thus, they collected juveniles and transported them past the Snake-Columbia river system's eight dams before releasing them downstream. However, adult salmon numbers returning from the ocean did not increase. The Pacific Ocean Shelf Tracking project, which tagged juvenile fish, showed that the smaller, l...

Teenage boys who eat fish at least once a week achieve higher intelligence scores

...searchers are now keen to carry out further research to see if the kind of fish consumed - for example lean fish in fish fingers or fatty fish such as salmon - makes any difference to the results. "But for the time being it appears that including fish in a diet can make a valuable contribution to cogni...

BioScience tip sheet, March 2009

...n Washington, Oregon, and Idaho, especially around the Columbia River corridor and the Willamette River basin. Non-native fish prey on juvenile native salmon in large numbers and appear to represent a major source of mortality comparable to better-known threats, such as harvest, hatcheries, the hydrosystem,...

When fish farms are built along the coast, where does the waste go?

... If you are a fish eater, it's likely that the salmon you had for dinner was not caught in the wild, but was instead grown in a mesh cage submerged in the open water of oceans or bays. Fish farming, a rel...

Ocean fish farming harms wild fish, study says

... Larger numbers of lice are especially dire for salmon because juvenile salmon must transit coastal areas where salmon farms are located. Juvenile pink and chum...

A fisheries catch-22

...andid look at whether these breeding programs are fulfilling their mandates. Using salmonids (the economically crucial group of fish that include salmon and trout) to illustrate his point, Fraser questions whether captive breeding is doing more harm than good. In his comprehensive review of over 300 p...

No place like home: New theory for how salmon, sea turtles find their birthplace

...ed the secret. At the beginning of their lives, salmon and sea turtles may read the magnetic field of the...propose. Previous studies have shown that young salmon and sea turtles can detect the Earth's magnetic fi...o specific areas rich in food. Sea turtles and salmon are among nature's most impressive ocean travelers...

Pitt researchers use fluorescence to develop method for detecting mercury in fish

... Other fluorescent detectors are often not compatible with samples that have been oxidized. In testing fish, Koide and his team oxidized a piece of salmon (about the size of a fingertip) in water mixed with a chlorine solution similar to household bleach. The conversion process is safe and relatively sim...

The 156th Acoustical Society of America Meeting, Nov. 10-14, Miami, Fla.

...rg/press/156th/deutsch.html (Includes Sound Clips) HOW WHALES FIND THE salmon THEY PREFER TO EAT "Killer whales use their biosonar when hunting for prey...hoes from these biosonar pulses are different when reflecting off different salmon species." http://www.acoustics.org/press/156th/au.html (Includes Sound C...

Acoustical Meeting, Nov. 10-14, 2008 in Miami, Florida

... Learning 1) KILLER WHALES PICKY ABOUT THEIR salmon Killer whales swimming the waters off British C...n the Chinook make up just 10 to 15 percent of the salmon swimming in the waters. How is it that the killer... to 12,000 pounds, can sort through the schools of salmon and find the Chinook swimming among the Coho and S...

Salmon smolt survival similar in Columbia and Fraser rivers

...itish Columbia has found that survival of juvenile salmon and steelhead during their migration to the sea th... fish reach the ocean." Columbia River juvenile salmon can be stressed by navigating the series of dams f...kened condition can be the difference when a young salmon tries to adapt to a salt water environment." Sc...

Lack of vitamin D linked to Parkinson's disease

...ts; fortified foods such as milk and packaged cereals are a minor source. Only a few foods in nature contain substantial amounts of vitamin D, such as salmon and tuna. The body's ability to produce vitamin D using UV-B radiation from the sun decreases with age, making older individuals at increased risk ...

Scientists Find new migratory patterns for Mediterranean and Western Atlantic bluefin tuna

...g for a large, highly migratory fish. "Our study clearly shows that bluefin tuna possess remarkable natal homing abilities that rival those of Pacific salmon and migratory birds. Nearly all of the adults from both the Gulf of Mexico and Mediterranean Sea returned to their place of origin to spawn," noted Ro...

Case Western Reserve University project ties soil conservation and river management together

...an choke out freshwater bugs and fish that require cleaner water. Fine sediment deposited on the stream bottom can smother eggs laid by fish including salmon and walleye. To preserve these populations of fish, we often try to rehabilitate streams by reducing the amount of sediment supplied to the stream. ...

Algal biomonitor

...ms across the globe. The approach outlined could help reduce the economic impact on fisheries, recreational activities, and aquaculture sites, such as salmon and shellfish farms, and pearl oyster farms. It could also help decrease the outbreaks of food poisoning due to contamination of seafood by the toxins...
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Breaking Biology News(10 mins):Biodiversity in the Mediterranean is threatened by alien species 2First comprehensive meshfree numerical simulation of skeletal muscle tissue achieved 2Rating the planet's oceans 2Rating the planet's oceans 3
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