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Results overall show estuary problems exist for some rivers, but issues involving feeding grounds at sea are impacting populations as well. In 2008, returns were markedly improved for Atlantic salmon on both sides of the Atlantic Ocean, but no one knows if this is a temporary improvement or sign of a trend.
In 1984, infectious salmon anemia (ISAv) was discovered in Norway in an Atlantic salmon hatchery. Eighty percent of the fish in the outbreak died. ISAv, a viral disease, is now a major threat to the viability of Atlantic salmon farming. It is now the first of the diseases classified on List One of the European Commission’s fish health regime.
The Atlantic salmon (Salmo salar) is a species of ray-finned fish in the family Salmonidae. It is the third largest of the Salmonidae, behind Siberian taimen and Pacific Chinook salmon, growing up to a meter in length. Atlantic salmon are found in the northern Atlantic Ocean and in rivers that flow into it.
The Patreksfjörður farmed salmon escape involved the escape of approximately 3500 farm-raised Atlantic salmon in an open fish farm on August 20, 2023, at Patreksfjörður, a village on the northwest coast of Iceland. [1] [2] The fish farm is managed by Arctic Fish, an agricultural company in Norway. Soon after the incident, Arctic Fish ...
The virus was first described in 1976 in Scotland and in 1989 in Norway. It affects farmed Atlantic salmon (Salmo salar) caused by Marine SAV2 and SAV3 and has also been identified in Rainbow trout (Oncorhyncus mykiss) in the seawater phase caused by SAV2 where the disease is commonly referred to as Sleeping Disease (SD). [1] [2] [3]
Prior to the incident, Washington was the only US state on the Pacific coast where Atlantic salmon was farmed. [3] Atlantic salmon are favored by salmon farmers, since their domestication process is much farther along; farmed Atlantic salmon have been selected for faster growth, higher tolerance to disease, and greater docility.
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North Atlantic salmon face many threats that have contributed to the significant population decline over the years and have garnered the need for restoration. Overfishing has historically affected numerous species across the globe, stemming from increasing pressure of both commercial and recreational fishing.