Ecological impacts of recent extension of feeding migration of NE-Atlantic mackerel intothe ecosystem around Iceland ...

• Main Authors: Óskarsson, Guðmundur J., Sveinbjörnsson, Sveinn, Guðmundsdóttir, Ásta, Sigurðsson, Þorsteinn
• Format: Conference Object
• Language: unknown
• Published: ASC 2012 - Theme session M 2024
• Subjects: Arctic Ocean ICES Ecoregion; Ecosystem observation, processes and dynamics; Arctic; Arctic Ocean; Iceland; Northeast Atlantic
• Online Access: https://dx.doi.org/10.17895/ices.pub.24974610; https://ices-library.figshare.com/articles/conference_contribution/Ecological_impacts_of_recent_extension_of_feeding_migration_of_NE-Atlantic_mackerel_intothe_ecosystem_around_Iceland/24974610

No abstracts are to be cited without prior reference to the author.Changes in environmental conditions have caused changes in feeding migration of pelagic fish stocks and such changes have been observed for centuries. Changes in migration can be expected to have impacts on the invaded ecosystem for bad or good through for example predation on native species, competition with native species for limited food resources, and/or being a prey for native species. Since around 2006 Northeast Atlantic mackerel (NEAM) has been extending its summer feeding distribution towards north and west, associated with increased sea temperature. The objective of this paper is to evaluate the ecological meaning and impacts of this extension on the ecosystem around Iceland through (i) exploration of its diet composition in comparison to those of two herring stocks feeding in the same area, (ii) providing estimates of weight gain and total food consumption of NEAM there, and (iii) exploring the inter-annual variation in body ...