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Recently Published paper describing Prey Items from Salmon in Greenland

 

A new paper was recently published in Fisheries Oceanography, which investigated the marine feeding of Atlantic salmon in the Northwest Atlantic. In the study, gut content and stable isotope analyses were combined to assess spatial and temporal differences in feeding at three sites on the West Greenland coast (Sisimiut, Nuuk and Qaqortoq) between 2009 and 2011. Some major take home messages from the study were:

 

  • Significant differences were found among sites for both gut contents and stable isotope analyses, with fewer differences evident temporally. 
  • Atlantic salmon are an opportunistic generalist predator whose diet varies spatially and temporally at regional and oceanic scales.
  • Limited studies to date prevent adequate characterization of Atlantic salmon vulnerabilities to changes in future prey composition due to changing climate and therefore the implications remain unknown.
  • Further study to document spatial and temporal dietary variation and changes in availability and quality of prey are required before definitive conclusions can be drawn about the trophic effects of oceanic regime change on Atlantic salmon.

 

For more information please contact Tim Sheehan at 508-495-2215 or Tim.Sheehan@noaa.gov.

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