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Tag: "salmon" at biology news

Researchers reveal the infectious impact of salmon farms on wild salmon

...shows that the transfer of parasitic sea lice from salmon farms to wild salmon populations is much larger and more extensive than previously believed. This quantitative analysis ...

Alaskan puzzles, monitoring provide insight about North Pacific salmon runs

...ram, the world's longest-running effort to monitor salmon and their ecosystems, has received nearly $2.4 mil... Alaska-based program has applications for Pacific salmon all along the West Coast, providing insights into the fluctuating fortunes of salmon runs and their ...

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

...the streams where they hatched. There are chinook salmon populations in Idaho in which an occasional male s...le has avoided the harrowing journey taken by most salmon to the ocean and back, bypassing hazards such as dams, sharks and fishermen. "In some species, all ...

Divergent life history shapes gene expression in brains of salmon

Scientists working with salmon have found that gene expression in the brain can d...tudy indicates that roughly 15 percent of Atlantic salmon genes show differential expression in males who migrate from their freshwater birthplaces to mature ...

Clear rules needed to govern deep sea bioprospecting: UNU

...i-irritant in cosmetics. A hormone extracted from salmon has been found effective in preventing osteoporosis while a salmon-derived sulfate is an antidote to the anticoagulant heparin. Sponges are particularly targeted as potential sources of pharmaceutical products. One of the most effective treatments f...

A Father’s Day Gift: Free DNA Paternity Testing

...i-irritant in cosmetics. A hormone extracted from salmon has been found effective in preventing osteoporosis while a salmon-derived sulfate is an antidote to the anticoagulant heparin. Sponges are particularly targeted as potential sources of pharmaceutical products. One of the most effective treatments f...

Bacteria which sense the Earth's magnetic field

... some years that certain animals -- like migratory salmon or homing pigeons -- have magnetite crystal chains in particular tissue. These chains are astoundingly similar to those in bacteria, and possibly develop through a related mechanism. ...

Marine mammals are on the frontline of failing ocean health

...s. Sub-populations once thought to feed mainly on salmon in Alaska are now suspected to be feeding on high trophic-level fish, such as shark or tuna, in California during the winter. Until recently, information about these animals was based on limited field studies. "This approach allows you to go where ...

High-tech tags on marine animals yield valuable data for biologists and oceanographers

...lifornia sea lions, northern elephant seals, tuna, salmon sharks, and albatross in the North Pacific, as well as southern elephant seals, Antarctic fur seals, and crabeater seals in the Southern Ocean. California sea lions are proving to be an excellent platform for monitoring oceanographic conditions alo...

Escapee farmed salmon infiltrate fitter wild populations

...ing concern about the threats that farmed Atlantic salmon escapees constitute to wild salmon populations. Consumers and environmentalists are concerned about farmed salmon yet heritable change...

Exotic crab poised for widespread UK invasion

...tive species such as the white-clawed crayfish and salmon eggs and fry. They also settle in river banks, burrowing into them and riddling them with bore holes up to half a metre long which may eventually cause the bank to collapse. The Newcastle University study, published in the academic journal Biologi...

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... tails. For decades ecologists have believed that salmon nest-digging triggered only local effects. But a University of Washington researcher writes in this ...

Contaminants linked to sturgeon decline in Columbia river

...d source for Oregon's Native Americans, and now as salmon runs diminish, white sturgeon fillets and steaks are increasingly sold in fish markets. But because of their potentially high contaminant levels, Schreck cautions consumers to not eat the fish at every meal. During the last 25 years, white sturgeon...

How to grow a bigger brain

...brains of those young fish were closer to those of salmon reared in the wild, and the fish also showed behavior closer to wild than to hatchery-reared fish. "There's an obvious difference between the hatchery and the wild fish," said graduate student Rebecca Kihslinger, who carried out the study with Gabri...

Salmon go veggie to save wild fish stocks

... But as the fish farming industry expands, feeding salmon and other aquatic species with pellets containing ...he basic essential omega-3 fatty acid needs of the salmon with some dietary fish oil, such as those for EPA (eicosapentaenoic acid) and DHA (docosahexaenoic a...

Creating a window on 'oceans in motion'

...help determine priority species for tracking ?from salmon to whales and from polar bears to penguins ?and pr...evealed the Pacific migration routes of young wild salmon from US and Canadian rivers. Knowing their usual travels along marine highways has far-reaching im...

Fish virus in Northeast spreading to other fish species

... reported in 1988 in the United States in spawning salmon in the Pacific Northwest. It was reported in North American freshwater fish in 2005 in muskellunge in Lake St. Claire, Mich., and in freshwater drum from the Bay of Quinte, Lake Ontario, Canada. ...

Cornell researchers find serious fish virus in Northeast for first time

... reported in 1988 in the United States in spawning salmon in the Pacific Northwest. It was reported in North... this point." Sport fishing for chinook and coho salmon is a $100 million annual industry for the Lake Ontario region alone. Ecologically speaking, the im...

Harmful Algal Blooms monitored from space in Chile

...s currently the world's largest producer of farmed salmon and has a burgeoning mussel culture industry that ...ter, potentially killing larger caged fish such as salmon that cannot flee the affected area. In the case of shellfish, such as mussels, toxins from the b...

Save the whales? Sure, but how many?

...will serve its role in ecosystems, such as Pacific salmon providing marine-derived nitrogen to watersheds, or predators reducing pest species, or birds dispersing seeds. 'Sustainable human use' represents the next tier, where there are enough animals that they can be used by humans, consumptively (as in h...

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