PMC:3216509 / 6533-8350 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/3216509","sourcedb":"PMC","sourceid":"3216509","source_url":"https://www.ncbi.nlm.nih.gov/pmc/3216509","text":"Atlantic salmon are economically, culturally and ecologically valuable anadromous fish, which return from the ocean to spawn in their natal rivers after spending either one winter at sea (1SW fish), or more than one winter at sea (MSW fish). Marine mortality in Atlantic salmon (Salmo salar L.) has increased from ∼70% in the 1970s to over 90% by 200536, coincident with a major decline in the global population. The current understanding of marine location in salmon is derived largely from tagging fish in home waters and recovering tagged fish in the high seas fisheries3738394041. Almost 4 million fish have been tagged in English and Welsh rivers since the 1950s, but fewer than 3000 (\u003c0.08%) have been recovered at sea, almost all from the two historic fishery areas west of Greenland and north of the Faroe Islands39. Based on these data, European fish from rivers above 62°N are believed to migrate to feeding grounds off the Faroe Islands and in the Norwegian and Barents Seas, while fish originating in European rivers below 62°N are thought to feed further west with some MSW-returning fish feeding in the Labrador Sea west of Greenland35424344454647. It is generally assumed that many river stocks and ages are mixed within marine feeding areas39, but identifying feeding locations used by specific river stocks or regional populations is challenging37, and stock-based management and conservation is hampered by a lack of information in the marine phase of life39. Given the above information, and the availability of long-term tissue archives, Atlantic salmon are an ideal test species for isotope-based investigations of migration and distribution. We use the relationship between time series of SST and measured tissue isotopes to identify likely feeding grounds at a stock- and cohort-specific level.","tracks":[]}