A5016767110- Marine and fisheries research
- Fish Ecology and Management Studies
- Marine and coastal ecosystems
- Marine Bivalve and Aquaculture Studies
- Marine Biology and Ecology Research
- Marine animal studies overview
- Ichthyology and Marine Biology
- Oceanographic and Atmospheric Processes
- Isotope Analysis in Ecology
- Marine and environmental studies
- Food Industry and Aquatic Biology
- Evolution and Genetic Dynamics
- Marine and coastal plant biology
- Ecology and Vegetation Dynamics Studies
- Social and Educational Sciences
- Conservation, Biodiversity, and Resource Management
- Biomimetic flight and propulsion mechanisms
- Plant and animal studies
- Aquaculture Nutrition and Growth
- Species Distribution and Climate Change
- Diverse academic and cultural studies
- Marine Ecology and Invasive Species
- Physiological and biochemical adaptations
- Ocean Acidification Effects and Responses
- Reproductive biology and impacts on aquatic species
Norwegian Institute of Marine Research
2010-2024
University of Bergen
1999-2013
Kellogg's (United States)
2000
University of Minnesota
2000
We present an individual-based model that uses artificial evolution to predict fit behavior and life-history traits on the basis of environmental data organism physiology. Our main purpose is investigate whether a suitable tool for studying life history real biological organisms. The evolutionary adaptation founded genetic algorithm searches improved solutions under scrutiny. From algorithm's "genetic code," determined using neural network. marine planktivorous fish Müller's pearlside...
The projected increase in global population will demand a major food production. There is need for more biomass from the ocean as future and feed, preferentially lower trophic levels. In this study, we estimated mesopelagic three Norwegian fjords. We analyzed nutrient composition six of most abundant species evaluated their potential contribution to feed security. make up large part deep Several species, especially fish Benthosema glaciale Maurolicus muelleri, were dense, containing high...
This paper analyses spatial and seasonal patterns for near-surface abundances of four Calanus species in the Northeast Atlantic based on monthly Continuous Plankton Recorder (CPR) Survey data collected during 2008–2016. C. finmarchicus, helgolandicus, hyperboreus glacialis represent different ecosystems, water masses with differing oceanographic properties origins. Hence, these are considered as indicator climate change studies. A southern transect between Norway United Kingdom represented...
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...
There is a long history of investigations fish diet in the Barents Sea. The focus has been on commercially important species and their food consumption, while interactions other fishes have studied only sporadically. In 2015, large-scale stomach sampling program was carried out for caught routine monitoring surveys Sea during different seasons year, supplemented with samples collected from Russian commercial fisheries. A total 27,657 stomachs 70 (including two genera) were analysed,...
Salmon aquaculture is in great need of good quality balanced protein and lipid sources, particularly marine omega-3 (n-3) long-chain polyunsaturated fatty acids (LC-PUFA), to sustain a further development the industry. One possibility harvest mesopelagic layers. Therefore, current project analysed hauls from three cruises (November 2015 October 2016) collected inner fjord systems around Bergen open-waters off Tromsø Ålesund, Norway. Jellyfish, krill, shrimps small amounts fish, Maurolicus...
The large estimates of mesopelagic fish biomass have fuelled harvesting interests in the relatively untouched ocean's twilight zone. Mueller's pearlside, one most abundant species inhabiting north Atlantic layer, is a candidate to such fisheries despite its enormous ecological importance and insufficient knowledge about population genetic structure. To shed light on latter, 863 individuals sampled across North Mediterranean were genotyped using 170 genome-wide SNPs. Analyses revealed...
The mesopelagic zone, located between 20-100m in depth, represents 20% of the ocean’s volume. substantial biomass organisms inhabiting these zones, estimated at 5-15 billion tons, has recently attracted attention states, raising question possibility sustainable exploitation. In Northeast Atlantic, Maurolicus muelleri and Benthosema glaciale, most abundant well-studied fish species, stand out. Nevertheless, species are still largely unknown, stock assessments remain riddled with considerable...
Abstract van der Kooij, J., Righton, D., Strand, E., Michalsen, K., Thorsteinsson, V., Svedäng, H., Neat, F. C., and Neuenfeldt, S. 2007. Life under pressure: insights from electronic data-storage tags into cod swimbladder function. – ICES Journal of Marine Science. 64: 1293–1301. The behavioural response (Gadus morhua) to sudden pressure reductions was investigated in a large electronic-tagging experiment using data collected 141 tagged five different areas the Northeast Atlantic. More than...
We investigate the trade-offs associated with vertical migration and swimming speed of Atlantic cod (Gadus morhua) using an adaptive individual-based model. Simulations varying distribution occurrence prey, without swimbladder constraints, visual predation were performed. Most simulations resulted in migrations between bottom pelagic zones. In high probability encountering spent daytime zone, moving to feed only when no prey encountered. At night stayed zone attain neutral buoyancy. low or...
The largest Calanus species in the Nordic Seas is also copepod for which we have poorest knowledge. Recent studies shown that C. hyperboreus more likely of sub-Arctic rather than Arctic origins, and are part its core distribution areas worldwide. Large size high fat content makes important prey planktivores, serve as main feeding grounds a considerable biomass planktivorous fish. We develop an individual-based model (IBM) based on existing knowledge growth life history hyperboreus, couple...
Abstract Despite the research on this important fish species for more than a century, surprisingly little is known of some fundamental aspects biology Atlantic cod, such as how light affects foraging behaviour. We measured reactive distances juvenile cod (age 1) over intensities from 0.01 to 64 µmol m−2 s−1 in controlled laboratory environment, and used these results estimate visual range parameters predictive model. The distance at indicated high sensitivity low conditions. was less...
Distribution of micronekton was investigated during early summer 2013, using data from a cruise covering the central parts four north Atlantic basins, Norwegian Sea (NS), Iceland (ICS), Irminger (IRS), and Labrador (LS). Continuous underway acoustics mapped vertical horizontal distributions, trawl sampling provided on biomass taxonomic composition. The hull mounted catches suggested that, among epipelagic, larger nektonic species (>20 cm length) highest in NS ICS while mesopelagic...
Abstract Calanoid copepods are key taxa in the North Sea as they main food source for many fish stocks, such herring, mackerel and cod. In this study we use an individual-based model Calanus finmarchicus embedded NORWegian ECOlogical Model system (NORWECOM) to investigate important population parameters biomass abundance, distribution interannual variability of overwintering population, well inflow C. into from adjacent areas 2000–2016 period. The modelled spatial–temporal patterns abundance...
ABSTRACT: The amounts of vitamin A palmitate lost and isomers formed in corn flakes fortified with a were determined during storage at ambient (avg. 23 °C) elevated (45 temperatures. Two isomers, 9‐cis 13‐cis, found. initial consisted 5% 13‐cis less than 1% the remaining being all‐trans. In either complete mixture or only, distribution these compounds was nearly constant throughout irrespective sample type conditions. rate reaction kinetics on degradation also obtained. After 6–8 wk storage,...
The Barents Sea is a nursery area for many fish stocks, and this whole region presently subject to rapid climatic change from cold period in the 1980s record warm latest decade, with peak 2016. present study focuses exclusively on year 2016, which was characterized by air seawater an exceptionally large horizontal coverage of Atlantic waters. Earlier studies have suggested that environmental conditions during first life are most critical class strength development stocks. We focus 8 species...
The glacier lanternfish Benthosema glaciale is a key myctophid with wide distribution in the northern Atlantic. It species that has strong vertical migration capacity and have potential to move between surface waters mesopelagic depths diel cycle (DVM), mainly depending on ambient light conditions. We investigated feeding ecology of B. across Norwegian, Iceland, Irminger Labrador Sea basins. An important component diet was various types calanoid copepods, but some additional variability deep...