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Wednesday, January 31, 2018
Is This Place Still Serving Farmed Salmon After I Busted Them?
Is This Place Still Serving Farmed Salmon After I Busted Them?
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The Ocean is NOT a Dumping Ground! Stop Farmed Salmon
The Ocean is NOT a Dumping Ground! Stop Farmed Salmon
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Alex Morton Interview: Don't Buy Farmed Salmon at all, It's loaded with viruses
Alex Morton Interview: Don't Buy Farmed Salmon at all, It's loaded with viruses
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What Other Wild Life Gets Killed Because of Salmon Farms. Alex Morton Interview
What Other Wild Life Gets Killed Because of Salmon Farms. Alex Morton Interview
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Friday, January 12, 2018
Wednesday, December 13, 2017
Starving Polar Bears... Are Salmon Farms Making Starving Grizzly Bears
Starving Polar Bears... Are Salmon Farms Making Starving Grizzly Bears
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Monday, December 11, 2017
Thursday, November 2, 2017
Popular Hudson Valley Market Might Stop Labeling Farmed Salmon as Wild Salmon.
Popular Hudson Valley Market Might Stop Labeling Farmed Salmon as Wild Salmon.
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Monday, October 23, 2017
Are New Zealand Salmon Wild?
Are New Zealand Salmon Wild?
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Wednesday, October 4, 2017
Farmed Salmon Proponents Want You to Believe This... #FarmedSalmonScam
Farmed Salmon Proponents Want You to Believe This... #FarmedSalmonScam
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Monday, August 28, 2017
Friday, May 5, 2017
Why Restaurants Should Not Buy Wild Salmon Here.... But they are :(
Why Restaurants Should Not Buy Wild Salmon Here.... But they are :(
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Monday, April 3, 2017
What about organic salmon? How about sustainable farmed salmon? Is it better?
What about organic salmon? How about sustainable farmed salmon? Is it better?
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Thursday, March 30, 2017
Why Are Salmon Farms Placed in High Current Waters....
Why Are Salmon Farms Placed in High Current Waters....
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Monday, March 27, 2017
Wednesday, March 15, 2017
Alexandra Morton Interview: How a Wild Collaspe Can Impact a Community
Alexandra Morton Interview: How a Wild Collaspe Can Impact a Community
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Monday, March 13, 2017
Monday, January 16, 2017
Wednesday, January 4, 2017
10 REASONS NOT TO EAT FARMED SALMON
POSTED ON 01/07/2014
BAD FOR YOU, BAD FOR THE OCEAN
WARNING: High fat content in farmed salmon (white streaks) contains toxins
Protect yourself do not eat farmed salmon
Protect our oceans - sign the petition http://www.change.org/en-CA/petitions/restore-wild-salmon-ban-salmon-feedlots-in-bc
1. Salmon farmers never shovel their manure, they just let it fall through the nets. Think kitty litter box, that never gets changed. Thousands of tons of feces and other waste on the seafloor around the sites that is never removed.
READ MORE
BAD FOR YOU, BAD FOR THE OCEAN
WARNING: High fat content in farmed salmon (white streaks) contains toxins
Protect yourself do not eat farmed salmon
Protect our oceans - sign the petition http://www.change.org/en-CA/petitions/restore-wild-salmon-ban-salmon-feedlots-in-bc
1. Salmon farmers never shovel their manure, they just let it fall through the nets. Think kitty litter box, that never gets changed. Thousands of tons of feces and other waste on the seafloor around the sites that is never removed.
READ MORE
2. 600,000 Atlantic salmon swimming in a soup of mucus and excrement - breeds pathogen mutations that enter the ocean and the supermarkets.
READ MORE
AND MORE
AND SOME MORE
READ MORE
AND MORE
AND SOME MORE
Wednesday, October 19, 2016
Here is Exactly How a Salmon Farm and Celebrity Chef Con You On Farmed Salmon
Here is Exactly How a Salmon Farm and Celebrity Chef Con You On Farmed Salmon
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Monday, October 3, 2016
Top 7 Most Toxic Fish and What To Eat Instead #1 of 7
Top 7 Most Toxic Fish and What To Eat Instead #1 of 7
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Saturday, October 1, 2016
Tuesday, September 13, 2016
Tuesday, September 6, 2016
Fish-farm escapees are weakening Norwegian wild salmon genetics
By Melati Kaye on 10 August 2016
Farmed salmon escaping from Norwegian aquaculture facilities are mating with wild salmon frequently enough to dilute their genetic stock, according to a recent paper.
- Norwegian scientists conducted a genetic analysis of 21,562 wild-caught juvenile and adult Atlantic salmon from 147 rivers — a geographical sampling representing three-fourths of Norway’s salmon population.
- The researchers found genes from farmed salmon in every wild population they tested, and “significant” genetic mixing in nearly half the rivers they sampled.
- “The extensive genetic introgression documented here poses a serious challenge to the management of farmed and wild Atlantic salmon in Norway and, in all likelihood, in other regions where farmed-salmon escape events occur with regularity,” the authors write in the paper.
Farmed salmon escaping from Norwegian aquaculture facilities are mating with wild salmon frequently enough to dilute their genetic stock, according to a recent paper. As a result the wild salmon have decreased genetic variability, according to the study authors, who are based at Norway’s government-run National Institute for Nature Study. Low genetic variability can make a species more susceptible to disease or even extinction.
Norway is the world’s largest producer of farmed adult Atlantic salmon (Salmo salar) and broodstock for salmon farms. The first salmon farms were established in Norway and Scotland in 1960.
“Escapes can happen in many ways,” statistician Ola Diserud, one of the study’s first authors, told Mongabay via email. Net pens torn open by storms can free hundreds of thousands of fish. Thousands more get loose in rivers as a result of careless handling by technicians, and the number of smolt or baby salmon lost in “trickle escapes” is “unknown but large,” Diserud said.
The study’s finding that escapees have an “extensive” influence on the genetic makeup of wild populations is somewhat counterintuitive. Farmed salmon are bred for their meat, and the traits companies carefully select for, like size and late reproductive age, would make the fish less fit for survival and spawning in local rivers. (When salmon enter reproduction mode, their flesh turns pale, mushy and flavorless.)
However, Diserud said his research shows that, “the continuous influx of new escapees over years may result in a significant genetic introgression even in high density populations.” Introgression is a diluting of genetic stock that occurs at a population level when animals from one distinct group breed with another — in this case farmed Atlantic salmon interbreeding with wild Atlantic salmon.
Diserud’s team’s research drew on a genetic analysis of 21,562 wild-caught juvenile and adult salmon from 147 rivers — a geographical sampling that the authors say represents three-fourths of Norway’s salmon population. The team compared genetic markers from the wild-caught fish against a reference library of genotypes of farmed individuals sourced from three prominent aquaculture companies and wild individuals from all over Norway.
The researchers found that every population they tested had some intermixing. Diserud said that on average, 6.4 percent of genetic material in the sampled fish came from farmed salmon.
The levels of introgression were higher for rivers in regions with many fish farms or a long-established aquaculture industry. In western Norway’s Hordaland County, which the authors dub “one of the two cradles of fish farming,” on average, 42.2 percent of the genetic material in sampled fish came from farmed salmon. This means that the average wild-caught fish in Hordaland County had one parent that originated on a fish farm. In all, the researchers found “significant introgression” in the wild salmon populations of nearly half the rivers they sampled.
Meanwhile, in National Salmon Rivers and National Salmon Fjords, which have protections from salmon farming and other human activities, they found lower levels of introgression: 4.5 percent and 6.4 percent respectively.
Diserud said that the ability of any individual farmed salmon to infiltrate and mate within a wild salmon population depends on the size of the local population and how much time the escapee has in the wild.
“For example, if the salmon escaped early and spent a year or more at sea before entering a river it will be more fit,” he said. Meanwhile, in low-density wild populations, “female farm salmon have easier access to good spawning sites and therefore better egg survival chances; and the farm males will have a better chance for participating in the spawning.”
An atlantic salmon (Salmo salar), at the Atlanterhavsparken aquarium in Ålesund, Norway. Photo by Hans-Petter Fjeld via Wikimedia Commons(CC-BY-SA).
“I think this is a really relevant paper,” said Ivan Arismendi of Oregon State University, who studies the effects of invasive species within stream ecosystems and is unaffiliated with Diserud’s team. “There are several scientific articles about the potential influences of salmon aquaculture escapees, but not in sites where salmonids are native species.”
“The extensive genetic introgression documented here poses a serious challenge to the management of farmed and wild Atlantic salmon in Norway and, in all likelihood, in other regions where farmed-salmon escape events occur with regularity,” Diserud and his co-authors write in the paper.
They go on to say that the Norwegian wild salmon genetic stock will become further weakened “unless substantial reduction of escaped farmed salmon in the wild, or sterilization of farmed salmon, can be achieved.”
Citations
Karlsson S., Diserud O. H., Fiske P., Hindar K. (2016). Widespread genetic introgression of escaped farmed Atlantic salmon in wild salmon populations. International Council for the Exploration of the Sea Journal of Marine Science doi: 10.1093/icesjms/fsw121.
Article published by Rebecca Kessler on 2016-08-10.
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