A5008118801- Marine and fisheries research
- Oceanographic and Atmospheric Processes
- Marine Bivalve and Aquaculture Studies
- Fish Ecology and Management Studies
- Climate variability and models
- Arctic and Antarctic ice dynamics
- Geophysics and Gravity Measurements
- Marine and coastal ecosystems
- Coral and Marine Ecosystems Studies
- Marine Biology and Ecology Research
- Arctic and Russian Policy Studies
- Marine and environmental studies
- Atmospheric and Environmental Gas Dynamics
- Ocean Acidification Effects and Responses
- Indigenous Studies and Ecology
- Geological Studies and Exploration
- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Marine animal studies overview
- Geology and Paleoclimatology Research
- Tropical and Extratropical Cyclones Research
- Marine and coastal plant biology
- Crustacean biology and ecology
- demographic modeling and climate adaptation
- Species Distribution and Climate Change
Farallon Institute
2019-2024
Norwegian Institute for Water Research
2017-2024
NOAA National Marine Fisheries Service Alaska Fisheries Science Center
2023
University of Bergen
1985-2023
Stanford University
2023
Norwegian Institute of Marine Research
1999-2017
John Wiley & Sons (United States)
2016
Ecological Society of America
2016
Bjerknes Centre for Climate Research
2011-2013
University of North Carolina at Chapel Hill
2007-2009
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 347:195-205 (2007) - DOI: https://doi.org/10.3354/meps06978 Linking behavioural ecology and oceanography: larval behaviour determines growth, mortality dispersal Øyvind Fiksen1,*, Christian Jørgensen1, Trond Kristiansen1,3, Frode Vikebø1,2,**, Geir Huse2 1University of Bergen, Department Biology, PO Box 7800,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 347:207-219 (2007) - DOI: https://doi.org/10.3354/meps06979 Drift, growth, and survival of larval Northeast Arctic cod with simple rules behaviour Frode Vikebø*, Christian Jørgensen, Trond Kristiansen, Øyvind Fiksen Department Biology, University Bergen, PO Box 7800, 5020 Norway *Email: frode.vikeboe@imr.no...
Background Fisheries exploitation, habitat destruction, and climate are important drivers of variability in recruitment success. Understanding can reveal mechanisms behind widespread decline the abundance key species marine terrestrial ecosystems. For fish populations, match-mismatch theory hypothesizes that successful is a function timing duration larval prey availability. However, underlying dynamics factors driving spatial differences between high low remain poorly understood....
Abstract Arctic and Antarctic marine systems have in common high latitudes, large seasonal changes light levels, cold air sea temperatures, ice. In other ways, however, they are strikingly different, including their: age, extent, geological structure, ice stability, foodweb structure. Both regions contain very rapidly warming areas climate impacts been reported, as dramatic future projections. However, the combined effects of a changing on oceanographic processes dynamics likely to influence...
Abstract The exploitation status of marine fisheries stocks worldwide is critical importance for food security, ecosystem conservation, and fishery sustainability. Applying a suite data‐limited methods to global catch data, combined through an ensemble modeling approach, we provide quantitative estimates 785 fish stocks. Fifty‐three percent (414 stocks) are below B MSY these, 265 estimated be 80% the level. While 149 above conventionally considered “fully exploited,” staying at this level...
Climate change impact studies need climate projections for different scenarios and at scales relevant to planning management, preferably a variety of models realizations capture the uncertainty in these models. To address current gaps, we statistically downscaled (SD) 3-7 CMIP6 five key indicators marine habitat conditions: temperature, salinity, pH, oxygen, chlorophyll across European waters three SSP1-2.6, SSP2-4.5, SSP5-8.5. Results provide ensemble averages estimates that can serve as...
Atlantic cod have been a primary target for marine stock enhancement since the 1880s. In early part of this period, hatched larvae were released in Norway, USA and Canada. The last larval releases conducted Norway 1971, century halted without any clear evidence benefit. Since 1980s, focus has on production larger, more viable juvenile cod. Emphasis given to design tag–release programmes involving large‐scale ecosystem analysis selected ecosystems. Most research carried out where than one...
Buoyancy acting on plankton, i.e. the difference in specific gravity between plankton and ambient water, is a function of salinity temperature. From measurements marine fish eggs appears to be only determinant buoyancy indicating that thermal expansions egg seawater are equal. We analyze mechanisms behind expansion order determine what extent it can justified neglect effects temperature buoyancy. Our results confirm earlier assumptions basic that, turn, influence vertical distributions and,...
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 (Theragra chalcogramma) support the largest single-species commercial fishery United States and represent an ecologically important component Bering Sea ecosystem. Variability walleye growth is structured part by climate-driven bottom-up control zooplankton composition. We...
Geographic redistribution of living natural resources changes access and thereby harvesting opportunities between countries. Internationally shared fish can be sensitive to shifts in the marine environment this may have great impact on economies countries regions that rely most heavily fisheries provide employment food supply. Here we present a climate change-related biotic expansion rich resource with substantial economic consequences, namely appearance northeast Atlantic mackerel (Scomber...
Abstract A gigantic light experiment is taking place in the Arctic. Climate change has led to substantial reductions sea ice extent and thickness Arctic Ocean. Sea ice, particularly when snow covered, acts as a lid hindering reach waters underneath. Less will therefore mean more entering water column, with profound effects on pelagic benthic ecosystems. Responses through primary production are so far well acknowledged. Here we argue that there need broaden view include light-driven fish,...
Abstract The North Atlantic Ocean contains diverse patterns of seasonal phytoplankton blooms with distinct internal dynamics. We analyzed using remotely-sensed chlorophyll a concentration data and change point statistics. first bloom the year began during spring at low latitudes later in summer higher latitudes. In regions where occurred high frequency (i.e., proportion years that was detected), there negative correlation between timing duration, indicating early last longer. much Northeast...
Abstract. Accurate and gap-free historical datasets of oceanic nutrient concentrations, dissolved oxygen, carbonate chemistry, are needed for the analysis anthropogenic impacts development predictive models, including as boundary conditions regional ocean models. We developed low-bias, quasi-optimal 4D interpolations observed values at latitudes >40° N, excluding Mediterranean Black Seas, years 1980–2020 inclusive. Our approach used output from NorESM-OCv1.2 model hindcast a basis...
Due to its geographical location, the North Sea is one of busiest seas worldwide, undergoing increasing pressure due continuous developments offshore human activities. These activities affect ecosystem, for example by introducing new habitats/species or infrastructure into previously unobstructed environments. At same time, climate change has already been affecting leading observed changes in species distribution. may also physical processes such as stratification. Stratification main...
Environmental variation can cause significant fluctuations in the survival of larval fish and plankton. Understanding these is critical for developing more accurate fisheries models, which are needed both scientific socioeconomic research. Growth, survival, dispersal marine planktonic larvae rely strongly on their behavior. Larval change vertical positioning due to strong gradients light, temperature, predation pressure, prey availability. Here, we explore how various behavioral rules...
Abstract The rapid decline in Pacific cod ( Gadus macrocephalus , Gadidae) biomass following multiple Gulf of Alaska marine heatwaves (2014–2016 and 2019) may be one the most dramatic documented changes a sustainably managed fishery. As such, fisheries managers are exploring new recruitment paradigms for under novel environmental conditions. In this review, we address challenges managing forecasting populations Eastern where thermal habitats early life stages undergoing varying rates change...
Individual-based models (IBMs) integrate behavioural, physiological, and developmental features differences among individuals. Building on previous process-based models, we developed an IBM of larval Atlantic cod (Gadus morhua) that included foraging, size-, temperature-, food-limited growth, environmental factors such as prey-field, turbulence, light. Direct comparison between fish IBMs experimental studies is lacking. Using data from a macrocosm study growth feeding cod, forced the model...
Abstract We review recent trends and projected future physical chemical changes under climate change in transition zones between Arctic Subarctic regions with a focus on the two major inflow gateways to Arctic, one Pacific (i.e. Bering Sea, Strait, Chukchi Sea) other Atlantic Fram Strait Barents Sea). Sea-ice coverage has been disappearing during last few decades. Projected higher air sea temperatures these will further reduce ice, cause its later formation earlier retreat. An...
Understanding the biophysical mechanisms that shape variability in fisheries recruitment is critical for estimating effects of climate change on fisheries. In this study, we used an Earth System Model (ESM) and a mechanistic individual-based model (IBM) larval fish to analyze how may impact growth survival cod North Atlantic. We focused our analysis five regions span current geographical range are known contain important spawning populations. Under SRES A2 (high emissions) scenario,...
Abstract Coupling an oil drift and fates model (Oscar) in offline environment with individual-based (IBM) for Northeast Arctic cod (Gadus morhua) eggs larvae enables us to quantify the exposure of from various spill scenarios. Oscar describes spatio-temporal dispersal fate hydrocarbons, whereas egg larval IBM integrates each individual. We can thus evaluate effects time location on degree individuals different spawning grounds (SGs). In addition, we how this effect is modified by dynamic...