A5008943550- Marine and fisheries research
- Fish Ecology and Management Studies
- Oceanographic and Atmospheric Processes
- Marine Bivalve and Aquaculture Studies
- Marine and coastal ecosystems
- Arctic and Antarctic ice dynamics
- Food Industry and Aquatic Biology
- European and International Law Studies
- Marine Biology and Ecology Research
- Reproductive biology and impacts on aquatic species
- Climate variability and models
- Environmental Science and Water Management
- Aquaculture Nutrition and Growth
- Coastal and Marine Management
- Isotope Analysis in Ecology
- Ocean Acidification Effects and Responses
- Indigenous Studies and Ecology
- Marine and environmental studies
- Coral and Marine Ecosystems Studies
- Marine animal studies overview
- Identification and Quantification in Food
- Ocean Waves and Remote Sensing
- Fish Biology and Ecology Studies
- Particle Dynamics in Fluid Flows
- Arctic and Russian Policy Studies
Norwegian Institute of Marine Research
2014-2024
Bjerknes Centre for Climate Research
2006-2013
Planetary Science Institute
1996
Johns Hopkins University
1996
Abstract The recruitment of Atlantic cod stocks shows different responses to temperature changes. Cod inhabiting the lower range show generally an increase in with increasing temperature, while uppermost part a decrease temperature. In present paper possible functional relationships between and mechanisms are analysed. Temperature influences processes large number ways; partly directly on vital rates cod, indirectly through trophic transfer. copepod Caianus fin marchions is dominant prey...
Abstract Sundby, S., and Nakken, O. 2008. Spatial shifts in spawning habitats of Arcto-Norwegian cod related to multidecadal climate oscillations change. – ICES Journal Marine Science, 65: 953–962. tend produce strong year classes warm years poor cold years. This work shows that intensity at various sites along 1500 km Norwegian coast is also influenced by variations. However, while the recruitment response temperature immediate on an interannual time-scale, changes site slower, a...
Journal Article Feeding conditions of Arcto-norwegian cod larvae compared with the Rothschild–Osborn theory on small-scale turbulence and plankton contact rates S. Sundby, Sundby Institute Marine ResearchPO Box 1870 Nordnes, 5024 Bergen, Norway Search for other works by this author on: Oxford Academic Google Scholar P. Fossum Plankton Research, Volume 12, Issue 6, 1990, Pages 1153–1162, https://doi.org/10.1093/plankt/12.6.1153 Published: 01 November 1990 history Received: 15 December 1989...
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....
The southern African coastline is dominated by strong currents. Along the eastern seaboard, warm western boundary Agulhas Current sweeps close inshore along shelf edge before diverging from coast on Bank and retroflecting back into Indian Ocean. On jet currents develop in Benguela, associated with thermal gradients induced upwelling intrusions eddies. There is, general, northward drift of surface waters Benguela offshore losses vicinity an exceptionally active region off LÜderitz. Several...
Egg specific gravity is a function of egg volume, chorion perivitelline space (PVS) and the ovoplasm. Experimental studies on cod ( Gadus morhua L.), marine multiple batch spawner, showed that approx. forty per cent volume incorporated between batches chorionic material has mean 1·20 (range: 1·14–1·35). The are low at end spawning period in extremely fecund fish. Specific ovoplasm was observed to be 1·017 eggs calculated about 1·008 brackish water eggs. Inherent variation PVS found have...
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,...
The transport of pelagic plankton by wind‐driven ocean currents and surface gravity waves is investigated for the example Northeast Arctic cod eggs larvae on coast northern Norway. Previous studies indicate that wave‐induced drift (i.e., Stokes drift) relevant particles in upper ocean. We use an general circulation model together with a numerical wave prediction Lagrangian particle tracking to calculate trajectories fish larvae. Waves are considered not only but also air—sea momentum flux,...
The North Atlantic with its spring-bloom ecosystem has particular responses to climate change, many of them different from the other parts world's oceans. system is strongly influenced by anthropogenic change as well strong decadal multidecadal natural variability. In particular, northernmost part and Arctic exposed higher increase in temperature than any ocean region. most pronounced examples poleward migration marine species are found Atlantic, comprise recent warming phase after 1970s....
ABSTRACT Sea temperature has earlier been shown to have a large influence on the recruitment of Arcto‐Norwegian cod, Gadus morhua. We here hypothesize that this linkage is partly due direct effect larval and juvenile growth. Secondly, acts as proxy for both biotic abiotic factors influencing recruitment. Indices abundance early cod (2–3 months old), 0‐group (4–5 old) 3‐year‐old are analysed in more detail against environmental temperature, wind stress components, wind‐induced turbulent...
Abstract Temperature has been identified in field studies as the physical parameter most influential on growth and recruitment of Arcto-Norwegian cod. However, it pointed out by many authors that temperature this context not only direct effects cod, but also indirect through lower trophic levels. Moreover, said might be a proxy for other climatic parameters. The present paper analyses quantitative larval pelagic juvenile from spawning Lofoten until 0-group fish settle Barents Sea. approach...
Abstract Impacts of climate change on ocean productivity sustaining world fisheries are predominantly negative but vary greatly among regions. We assessed how 39 resources—ranging from data‐poor to data‐rich stocks—in the North East Atlantic most likely affected under intermediate emission scenario RCP4.5 towards 2050. This region is one productive waters in subjected pronounced change, especially northernmost part. In this impact assessment, we applied a hybrid solution combining expert...
Abstract The reproductive success of marine ectotherms is especially vulnerable in warming oceans due to alterations adult physiology, as well embryonic and larval survival prospects. These vital responses may, however, differ considerably across the species' geographical distribution. Here we investigated life history, focusing on ecology, three spatially distant populations (stocks) Atlantic cod ( Gadus morhua , Gadidae) (50–80° N), Irish/Celtic Seas‐English Channel Complex, North Barents...
Based on existing models of fish vision and turbulence‐mediated ingestion rates, we develop a model rates in larval that combines several physical properties the environment (turbulence, irradiance, light attenuation) visual characteristics predators prey. The range was calibrated with observed estimates herring ( Clupea harengus ) cod Gadus morhua ). improved ability length larvae predicted to be most sensitive part model. Both turbulence had strong impacts rate fish. optimal level...
Abstract Norwegian coastal cod form a stationary population of Atlantic Gadus morhua consisting several genetically separated subpopulations. A small‐scale differentiation in marine populations with pelagic eggs and larvae is made possible by local retention early life stages environments. numerical model was used to simulate the circulation fjord system northern Norway over 2 years different river runoff patterns. The dispersal calculated particle‐tracking that three‐dimensional currents....
Cod and pollock abundances distributions shift as climate ocean conditions change
Abstract The Norwegian coast is populated by two cod populations: Northeast Arctic and Coastal cod. In this paper, we use a further division based on life history: oceanic cod, coastal fjord A numerical ocean model was implemented for the northern where all these populations have spawning areas. results were used to simulate connectivity retention of eggs from different subpopulations. reproduced observed variability mesoscale activity in Current. Eggs released at an area transported...
Abstract The introduction of 200 n.m. exclusive economic zones (EEZs) in the late 1970s required increased collaboration among neighbouring coastal states to manage transboundary and straddling fish stocks. established agreements ranged from bilateral multilateral, including high‐seas components, as appropriate. However, 1982 United Nations Convention on Law Sea does not specify how quotas stocks crossing EEZs should be allocated, nor was it written for topical scenarios, such climate change...