Browsing Articles by Author "Kristiansen, Trond"
Now showing items 1-14 of 14
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Applying a New Ensemble Approach to Estimating Stock Status of Marine Fisheries around the World
Rosenberg, Andrew; Kleisner, Kristin M; Afflerbach, Jamie; Anderson, Sean C.; Dickey-Collas, Mark; Cooper, Andrew B.; Fogarty, Michael J.; Fulton, Elizabeth A.; Gutierrez, Nicolas L.; Hyde, Kimberly J.W.; Jardim, Ernesto; Jensen, Olaf P.; Kristiansen, Trond; Longo, Catherine; Minte-Vera, Carolina V.; Minto, Coilin; Mosqueira, Iago; Osio, Giacomo Chato; Ovando, Daniel; Selig, Elizabeth R; Thorson, James T.; Walsh, Jessica C.; Ye, Yimin (Journal article; Peer reviewed, 2018)The exploitation status of marine fisheries stocks worldwide is of critical importance for food security, ecosystem conservation, and fishery sustainability. Applying a suite of data‐limited methods to global catch data, ... -
Carbon export is facilitated by sea urchins transforming kelp detritus
Filbee-Dexter, Karen; Pedersen, Morten Foldager; Fredriksen, Stein; Norderhaug, Kjell Magnus; Rinde, Eli; Kristiansen, Trond; Albretsen, Jon; Wernberg, Thomas (Peer reviewed; Journal article, 2019)With the increasing imperative for societies to act to curb climate change by increasing carbon stores and sinks, it has become critical to understand how organic carbon is produced, released, transformed, transported, and ... -
Declining size-at-harvest in Norwegian salmon aquaculture: Lice, disease, and the role of stunboats
Barrett, LukeT.; Oldham, Tina Marie Wier; Kristiansen, Trond; Oppedal, Frode; Stien, Lars Helge (Peer reviewed; Journal article, 2022)Sea cages used for fish farming are typically open to the environment, making the grow-out phase a race against the accumulation of infections. In Norway, farmed Atlantic salmon (Salmo salar) suffer outbreaks of salmon ... -
Drift, growth, and survival of larval Northeast Arctic cod with simple rules of behaviour
Vikebø, Frode; Jørgensen, Christian; Kristiansen, Trond; Fiksen, Øyvind (Journal article; Peer reviewed, 2007-10-11)Due to vertical variations in ocean circulation, larval Northeast Arctic cod Gadus morhua may influence their own drift routes by migrating vertically. By coupling a larval individual-based model and a general circulation ... -
Individual-based modeling of feeding ecology and prey selection of larval cod on Georges Bank
Kristiansen, Trond; Lough, R. G.; Werner, Francisco E.; Broughton, Elisabeth A.; Buckley, Larry J. (Journal article; Peer reviewed, 2009-02-11)Understanding larval fish survival dynamics is essential to determining variability in future adult population structure. Realistic modeling of larval fish feeding ecology depends on incorporating both the biotic and abiotic ... -
Linking behavioural ecology and oceanography: larval behaviour determines growth, mortality and dispersal
Fiksen, Øyvind; Jørgensen, Christian; Kristiansen, Trond; Vikebø, Frode; Huse, Geir (Journal article; Peer reviewed, 2007-10-11)Highly resolved general circulation models (GCMs) now generate realistic flow fields, and have revealed how sensitive larval drift routes are to vertical positioning in the water column. Sensible representation of behavioural ... -
Possible future scenarios for two major Arctic Gateways connecting Subarctic and Arctic marine systems: I. Climate and physical-chemical oceanography
Drinkwater, Kenneth F.; Harada, Naomi; Nishino, Shigeto; Chierici, Melissa; Danielson, Seth L.; Ingvaldsen, Randi Brunvær; Kristiansen, Trond; Hunt, George L.; Mueter, Franz; Stiansen, Jan Erik (Peer reviewed; Journal article, 2021)We review recent trends and projected future physical and chemical changes under climate change in transition zones between Arctic and Subarctic regions with a focus on the two major inflow gateways to the Arctic, one in ... -
Prey selection by larval haddock and cod on copepods with species-specific behavior: an individual-based model analysis
Petrik, Colleen M.; Kristiansen, Trond; Lough, R. G.; Davis, Cabell S. (Journal article; Peer reviewed, 2009-12-09)Coupled biological-physical models of larval fish have become a widely used tool for studying recruitment variability. Within these models, foraging components include prey selection as a determinant of food availability ... -
Real-Time Ichthyoplankton Drift in Northeast Arctic Cod and Norwegian Spring-Spawning Herring
Vikebø, Frode; Ådlandsvik, Bjørn; Albretsen, Jon; Sundby, Svein; Stenevik, Erling Kåre; Huse, Geir; Svendsen, Einar; Kristiansen, Trond; Eriksen, Elena (Journal article; Peer reviewed, 2011-11-16)Background: Individual-based biophysical larval models, initialized and parameterized by observations, enable numerical investigations of various factors regulating survival of young fish until they recruit into the adult ... -
Recruitment Variability in North Atlantic Cod and Match-Mismatch Dynamics
Kristiansen, Trond; Drinkwater, Ken; Lough, R. G.; Sundby, Svein (Journal article; Peer reviewed, 2011-03-07)Background Fisheries exploitation, habitat destruction, and climate are important drivers of variability in recruitment success. Understanding variability in recruitment can reveal mechanisms behind widespread decline in ... -
Seasonal phytoplankton blooms in the North Atlantic linked to the overwintering strategies of copepods
Friedland, Kevin D; Record, Nicholas R; Asch, Rebecca G; Kristiansen, Trond; Saba, Vincent S; Drinkwater, Kennneth F.; Henson, Stephanie; Leaf, Robert T; Morse, Ryan E; Johns, David G; Large, Scott I; Hjøllo, Solfrid Sætre; Nye, Janet A; Alexander, Mike A; Ji, Rubao (Journal article; Peer reviewed, 2016)The North Atlantic Ocean contains diverse patterns of seasonal phytoplankton blooms with distinct internal dynamics. We analyzed blooms using remotely-sensed chlorophyll a concentration data and change point statistics. ... -
Spatial Match-Mismatch between Juvenile Fish and Prey Provides a Mechanism for Recruitment Variability across Contrasting Climate Conditions in the Eastern Bering Sea
Siddon, Elizabeth Calvert; Kristiansen, Trond; Mueter, Franz J.; Holsman, Kristin K.; Heintz, Ron A.; Farley, Edward V. (Journal article; Peer reviewed, 2013-12-31)Understanding mechanisms behind variability in early life survival of marine fishes through modeling efforts can improve predictive capabilities for recruitment success under changing climate conditions. Walleye pollock ... -
The principles of buoyancy in marine fish eggs and their vertical distributions across the world oceans
Sundby, Svein; Kristiansen, Trond (Journal article; Peer reviewed, 2015-10-14)Buoyancy acting on plankton, i.e. the difference in specific gravity between plankton and the ambient water, is a function of salinity and temperature. From specific gravity measurements of marine fish eggs salinity appears ... -
Water type quantification in the Skagerrak, the Kattegat and off the Jutland west coast
Kristiansen, Trond; Aas, Eyvind (Journal article; Peer reviewed, 2014-12-06)An extensive data series of salinity, nutrients and coloured dissolved organic material (CDOM) was collected in the Skagerrak, the northern part of the Kattegat and off the Jutland west coast in April each year during the ...