News tagged with salmon population
Three keys to sockeye decline
(Phys.org) -- Competition with pink salmon in the open ocean could be an important factor in the long-term decline in abundance of sockeye salmon populations in the Fraser River, according to new research from Simon Fraser ...
May 18, 2012 |
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Finding an alternative to feeding fish fish
Scientists at the University are developing a new plant-based product that could replace fishmeal, reducing the need for farmers to feed fish to other fish at a time when more than 90% of EU waters are at ...
May 15, 2012 |
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Growing risks from hatchery fish
A newly published collection of more than 20 studies by leading university scientists and government fishery researchers in Alaska, British Columbia, Washington, Oregon, California, Russia and Japan provides ...
May 14, 2012 |
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Hatchery fish mask the decline of wild salmon populations
Scientists have found that only about ten percent of the fall-run Chinook salmon spawning in California's Mokelumne River are naturally produced wild salmon. A massive influx of hatchery-raised fish that return to spawn in ...
Feb 08, 2012 |
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Protecting predator and prey when both are in trouble
When both a predator and its prey are conservationally at risk, it can be difficult to find the right balance of ecosystem management to sustain and protect both.
Nov 09, 2011 |
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Warming streams could be the end for salmon
Warming streams could spell the end of spring-run Chinook salmon in California by the end of the century, according to a study by scientists at UC Davis, the Stockholm Environment Institute and the National ...
Sep 01, 2011 |
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The same number of fishermen, but less salmon in Spanish rivers
"It's not that the salmon are biting less, there are less of them," explained Eva García Vázquez, lead author and Functional Biology researcher at the University of Oviedo (Spain).
Aug 26, 2011 |
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Parasite loads an underlying cause of salmon mortality, linked to land use changes
A recent study suggests that parasites in fish, including threatened species of Oregon coho salmon, may have more profound impacts on fish health than has been assumed, and could be one of the key mechanisms ...
Aug 15, 2011 |
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Models show Coho salmon at risk in US urbanizing watersheds
For a decade researchers in Seattle have worked to solve the mystery of why adult coho salmon are dying prematurely in urban streams when they return from the ocean to mate and spawn. In a study published in Integrated En ...
Jul 26, 2011 |
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First study into GM Atlantic salmon mating reveals danger of escape to wild gene pool
If genetically modified Atlantic salmon were to escape from captivity they could succeed in breeding and passing their genes into the wild, Canadian researchers have found. Their research, published in Evolutionary Applications, explor ...
Jul 13, 2011 |
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Some populations of Fraser River salmon more likely to survive climate change: study
Populations of Fraser River sockeye salmon are so fine-tuned to their environment that any further environmental changes caused by climate change could lead to the disappearance of some populations, while others may be less ...
Mar 31, 2011 |
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Averting the perfect storm for wild salmon
We hear so much about missing wild salmon and recently a record run. But Simon Fraser University scientists say a population explosion of hatchery and wild salmon in the North Pacific Ocean is leading hatchery fish to beat ...
Oct 04, 2010 |
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Changes in net flow of ocean heat correlate with past climate anomalies
Physicists at the University of Rochester have combed through data from satellites and ocean buoys and found evidence that in the last 50 years, the net flow of heat into and out of the oceans has changed ...
Aug 14, 2009 |
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