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Seasonal Variability in Energetic Value of Crangon Alaskensis and Effects of Marine Heatwaves in the Northeast Pacific Ocean

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https://ir.library.oregonstate.edu/concern/articles/2801pr69p

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Abstract
  • Research cruises were conducted to sample the invertebrates community along the shelf off the central coast of Oregon from 2010 to 2018 . A large marine heatwave (MHW ) hit the northeast Pacific in fall 2014 and persisted locally through 2015 . Here , we assessed the caloric content changes of Crangon alaskensis (a common sandy shrimp ) before, during, and after the 2014 –2015 MHW. We found significant reductions in the caloric density of shelf populations of C. alaskensis during summer 2015 . Oceanographic indices like the Biologically Effective Up - welling Transport Index (BEUTI ) and the Pacific Decada l Oscillation (PDO ) had greater predictive power for caloric density and biomass than in situ conditions, although bottom temperature and dissolved oxygen were also significantly correlated with caloric density. Caloric density of C. alaskensis was highest in 2018, indicating favor-able conditions after the intense MHW of 2014 –2015 allowed the caloric density to rebound.
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  • 197
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  • This research was made possible by the South Dakota Experiment Station, Project SD00H674-19.
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  • 1879-0291

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