A5015077251- Marine and fisheries research
- Fish Ecology and Management Studies
- Marine and coastal ecosystems
- Marine Bivalve and Aquaculture Studies
- Marine animal studies overview
- Isotope Analysis in Ecology
- Marine Biology and Ecology Research
- Oceanographic and Atmospheric Processes
- Food Industry and Aquatic Biology
- Marine and environmental studies
- Aquaculture Nutrition and Growth
- Nonlinear Optical Materials Research
- Underwater Acoustics Research
- Arctic and Antarctic ice dynamics
- Cephalopods and Marine Biology
- Laser Material Processing Techniques
- Identification and Quantification in Food
- Fish Biology and Ecology Studies
- Aquaculture disease management and microbiota
- Genetic diversity and population structure
- Ichthyology and Marine Biology
- Coral and Marine Ecosystems Studies
- Crystal Structures and Properties
- Geology and Paleoclimatology Research
- Photorefractive and Nonlinear Optics
Norwegian Institute of Marine Research
2015-2024
Acoustics (Norway)
2021
Bjerknes Centre for Climate Research
2009
University of Oslo
1996-2007
Friedrich Schiller University Jena
1974-1983
Schiller International University
1974
Here we present a new, pan-Atlantic compilation and analysis of data on Calanus finmarchicus abundance, demography, dormancy, egg production mortality in relation to basin-scale patterns temperature, phytoplankton biomass, circulation other environmental characteristics the context understanding factors determining distribution abundance C. across its North Atlantic habitat. A number themes emerge: (1) south-to-north transport plankton northeast contrasts with north-to-south western...
A total of six isoprotein and isolipid diets for Atlantic salmon, Salmo salar L., were prepared substituting from 0 to 100% fish meal protein (0–68% diet by dry weight) with Antarctic krill (Euphausia superba). The feed produced high inclusion levels had lower ability absorb lipid during vacuum coating than meal. Both amino acid fatty compositions the fairly similar. experiment commenced using salmon averaging 500 g ended at a mean weight 1500–1800 g (140 days feeding). Moderate amounts...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 169:211-228 (1998) - doi:10.3354/meps169211 Reproduction and development of Calanus finmarchicus, C. glacialis hyperboreus in Barents Sea W. Melle*, H. R. Skjoldal Institute Research, Nordnesgt. 50, N-5024 Bergen, Norway *E-mail: webjoern.melle@imr.no ABSTRACT: The aim this study is examine reproduction...
Abstract Norwegian spring-spawning herring, Clupea harengus L., are long-lived multiple spawners subject to strong variation in recruitment success. They tend adopt low-risk, preferred-conservative strategies, yet they display considerable plasticity migratory behaviour and associated spatial dynamics. Although their migration patterns have long been investigated, few studies analysed the factors mechanisms governing In this study an ecological evolutionary perspective is adopted,...
Abstract Copepods of the genus Calanus play a key role in marine food webs as consumers primary producers and prey for many commercially important species. Within genus, glacialis finmarchicus are considered indicator species Arctic Atlantic waters, respectively, changes their distributions frequently used tool to track climate change effects ecosystems northern hemisphere. Despite extensive literature available, discrimination between these two remains challenging. Using genetically...
Planktonic copepods of the genus Calanus play a central role in North Atlantic/Arctic marine food webs. Here, using molecular markers, we redrew distributional ranges species inhabiting Atlantic and Arctic Oceans revealed much wider more broadly overlapping distributions than previously described. The shelf species, C. glacialis , dominated zooplankton assemblage many Norwegian fjords, where only finmarchicus has been reported previously. In these high occurrences hyperboreus were also...
Abstract The copepod Calanus finmarchicus is the dominant species of meso-zooplankton in Norwegian Sea, and constitutes an important link between phytoplankton higher trophic levels Sea food chain. An individual-based model for C. finmarchicus, based on super-individuals evolving traits behaviour, stages, etc., two-way coupled to NORWegian ECOlogical Model system (NORWECOM). One year modelled spatial distribution, production biomass are found represent observations reasonably well. High...
The Norwegian Sea (NS) is the feeding ground for some of largest fish stocks in world, including spring spawning (NSS) herring (Clupea harengus Linnaeus, 1758; Figure 1), blue whi...
Abstract The vertical and horizontal distribution patterns of zooplankton micronekton were mapped during three research cruises in summers 1993, 1994 1995 by pelagic trawl MOCNESS plankton net sampling. have been related to the water masses planktivorous fish such as herring, Clupea harengus. Zooplankton biomass typically revealed a bimodal with high values surface layer at 200-600 m depth. This subsurface maximum contained, among others, several species macrozooplankton krill, shrimps...
Abstract Mork, K. A., Gilbey, J., Hansen, L. P., Jensen, A. Jacobsen, J. Holm, M., Holst, C., Ó Maoiléidigh, N., Vikebø, F., McGinnity, Melle, W., Thomas, K., Verspoor, E., and Wennevik, V. 2012. Modelling the migration of post-smolt Atlantic salmon (Salmo salar) in Northeast Atlantic. – ICES Journal Marine Science, 69: 1616–1624. The during their first 4 months at sea was simulated using an individual-based model that combined a particle-tracking scheme with growth behaviour routines....
Abstract During the last few decades, many wild Atlantic salmon populations have declined dramatically. One possible contributing factor for decline is reduced prey availability at sea. Here, we examine post-smolt diet and investigate if post-smolts show signs of selective feeding based on 2546 sampled from west Ireland to northern Norwegian Sea over a 25-year period. We also test changes time in stomach fullness, diet, condition body length. There was clear reduction period 2003–2012. The...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 136:51-58 (1996) - doi:10.3354/meps136051 Vertical distribution of fish and krill beneath water varying optical properties Kaartvedt S, Melle W, Knutsen T, Skjoldal HR The acoustical scattering layers changed markedly in concert with fluctuating fluorescence (chlorophyll a) upper waters, possibly due a...
The main objective of the present study was to evaluate effect using three different crustacean meals (Tysanoessa inermis, Euphausia superba, Themisto libellula) on product quality Atlantic salmon (Salmo salar L.). In order do this, a total six iso-protein, iso-lipid and iso-carotenoid diets were prepared. Two experimental diet series first series, control feed (K0) compared with where 20%, 40% 60% fish meal protein replaced from Northern krill T. inermis (K20, K40 K60, respectively). second...
Atlantic salmon (Salmo salar L.) were fed fishmeal protein for 46 days, and 500 g kg−1 of substituted with meal from Northern krill (Meganyctiphanes norvegica). No differences observed in weight gain, length feed conversion or specific growth rate between the groups that could be attributed to dietary manipulation. The adherent microbiota hindgut two rearing further investigated. By substituting krillmeal, total viable counts aerobic facultative bacteria colonizing increased 8.5 × 104 2.2...
The effects of partial replacement fish meal (FM) with made from northern krill (Thysanoessa inermis), Antarctic (Euphausia superba) or Arctic amphipod (Themsto libellula) as protein source in the diets for Atlantic salmon (Salmo salar L.) and halibut (Hippoglossus hippoglossus on growth, feed conversion, macro-nutrient utilization, muscle chemical composition welfare were studied. Six experimental prepared using a low-temperature FM diet control. other included where 20, 40 60% dietary was...
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...
During the last decades, many wild Atlantic salmon populations have declined dramatically. One hypothesis for an observed reduction in marine growth and survival is reduced abundance of prey. However, effect spatial temporal variation prey on post-smolt feeding conditions poorly understood. Here we use stomach content data from 2572 post-smolts sampled during 25 years Northeast Ocean to examine changes diet fullness. Sandeel larvae west Scotland Ireland northern North Sea, herring eastern...
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...