scholarly journals Modelling secondary production in the Norwegian Sea with a fully coupled physical/primary production/individual-based Calanus finmarchicus model system

2012 ◽  
Vol 8 (5-6) ◽  
pp. 508-526 ◽  
Author(s):  
Solfrid Sætre Hjøllo ◽  
Geir Huse ◽  
Morten D. Skogen ◽  
Webjørn Melle
Keyword(s):  
Primary Production ◽  
Secondary Production ◽  
Model System ◽  
Calanus Finmarchicus ◽  
Norwegian Sea ◽  
Fully Coupled

Validation of an Eulerian population model for the marine copepod Calanus finmarchicus in the Norwegian Sea

2016 ◽  
Vol 160 ◽  
pp. 81-93 ◽  
Author(s):  
Morten Omholt Alver ◽  
Ole Jacob Broch ◽  
Webjørn Melle ◽  
Espen Bagøien ◽  
Dag Slagstad
Keyword(s):  
Population Model ◽  
Calanus Finmarchicus ◽  
Norwegian Sea ◽  
Marine Copepod

scholarly journals Diets of herring, mackerel, and blue whiting in the Norwegian Sea in relation to Calanus finmarchicus distribution and temperature conditions

2006 ◽  
Vol 63 (1) ◽  
pp. 117-127 ◽  
Author(s):  
Irina Prokopchuk ◽  
Evgeniy Sentyabov
Keyword(s):  
Stomach Content ◽  
Diet Composition ◽  
Pelagic Fish ◽  
Calanus Finmarchicus ◽  
Norwegian Sea ◽  
Main Prey ◽  
Blue Whiting ◽  
Important Prey ◽  
Hydrographic Conditions ◽  
Feeding Area

Abstract Diets of Norwegian spring-spawning herring, mackerel, and blue whiting in the Norwegian Sea are investigated in relation to the distribution of plankton and hydrographic conditions. Fish stomachs and zooplankton samples were collected during summer (June and July) cruises in 2001 and 2002. Calanus finmarchicus was the principal prey of mackerel, accounting for 53–98% of total stomach content by weight. The diet composition of herring varied depending on feeding area and availability of food under various environmental conditions. C. finmarchicus was important prey for herring only in July 2001 (about 77% by weight) in the central part of the sea and in June 2002 (about 82% by weight) near the Lofotens. In July 2002 appendicularians (Oikopleura spp.), amphipods (mainly Parathemisto abissorum), and euphausiids were important in the diet of herring, and at some stations cannibalism was observed. The main prey of blue whiting were amphipods (10–34% by weight), appendicularians (11–34%), and euphausiids (8–47%), as they usually feed deep in the water column, though C. finmarchicus was important, particularly in June 2002, when blue whiting were caught in the upper layers of the sea. Higher water temperatures indirectly affect pelagic fish through accelerated development of their prey and favourable conditions for migration farther north.

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