Results
Based upon a qualitative evaluation of trends in stock biomass, fishing mortality proxy and recruitment. Input data are research survey indices and fishery catches.
Next full assessment is planned for 2021.
Human impactMainly fishery related mortality has been documented. Other sources (e.g. pollution, shipping, oil-industry) are considered minor.
Biological and Environmental InteractionsAfter reaching record-high conditions in 2010-2011 (warmest conditions since 1980), the bottom temperature in 3LNO have cooled down to near-normal conditions in 2014-2018. Direct effects of temperature on shrimp distribution, recruitment, growth and survival are poorly understood.
Predation (by cod, Greenland halibut and redfish), low abundance of high energy prey (such as capelin) and environmental factors (including phytoplankton bloom dynamics) appear to be important drivers of the decline of Northern Shrimp in Divs. 2J3KL.
Fishing MortalityRecruitmentBiomass