Search Results - "Skjæraasen, J. E."

Sex-specific vertical movements of spawning atlantic cod in coastal habitats inferred from acoustic telemetry by Skjæraasen, J. E., Olsen, E. M., McQueen, K., Nyqvist, D., Meager, J. J., Karlsen, Ø, Sivle, L. D.

“…Fish spawning location and behaviour can be challenging to detect, especially in deep water. Here we utilise two large acoustic telemetry datasets from western…”
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Behavioural responses of wild, spawning Atlantic cod (Gadus morhua L.) to seismic airgun exposure by McQueen, K, Skjæraasen, J E, Nyqvist, D, Olsen, E M, Karlsen, Ø, Meager, J J, Kvadsheim, P H, Handegard, N O, Forland, T N, de Jong, K, Sivle, L D

“…Abstract Seismic airgun surveys to map petroleum deposits in the seabed may impact behaviour of marine animals over large distances. Understanding whether fish…”
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Impact of salmon farming on Atlantic cod spatio-temporal reproductive dynamics by Skjæraasen, JE, Karlsen, Ø, Langangen, Ø, van der Meeren, T, Keeley, NB, Myksvoll, MS, Dahle, G, Moland, E, Nilsen, R, Elvik Schrøder, KM, Bannister, RJ, Olsen, EM

“…Salmon farming in marine net pens is a major activity in many temperate regions. This industry may affect coastal ecosystems in several ways, such as with…”
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Triploidy alters brain morphology in pre-smolt Atlantic salmon Salmo salar: possible implications for behaviour by Fraser, T. W. K., Fjelldal, P. G., Skjæraasen, J. E., Hansen, T., Mayer, I.

“…Total brain mass and the volumes of five specific brain regions in diploid and triploid Atlantic salmon Salmo salar pre‐smolts were measured using digital…”
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Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms by Skjæraasen, J. E., Karlsen, Ø., Langangen, Ø., Meier, S., Dunlop, K. M., van der Meeren, T., Keeley, N. B., Myksvoll, M. S., Dahle, G., Moland, E., Nilsen, R., Schrøder, K. M. Elvik, Bannister, R. J., Olsen, E. M.

“…Wild fish aggregate at aquaculture net-pens, but the underlying mechanisms are not fully understood. This study examined how salmon farms attract coastal…”
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effect of triploidy on the efficacy and physiological response to anesthesia with MS 222 and isoeugenol in Atlantic salmon post-smolts by Fraser, T. W. K, Mayer, I, Skjæraasen, J. E, Hansen, T, Fjelldal, P. G

“…Sterile triploid fish are increasingly being used in salmon aquaculture and fisheries. For production, welfare, and experimental reasons, it is important to…”
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Skipped spawning in Northeast Arctic haddock Melanogrammus aeglefinus by Skjæraasen, J. E., Korsbrekke, K., Nilsen, T., Fonn, M., Kjesbu, O. S., Dingsør, G. E., Nash, R. D. M.

“…Large interannual fluctuations in the numbers of offspring joining a teleost population are common, yet factors affecting offspring production, a key driver of…”
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Vaccination and triploidy increase relative heart weight in farmed Atlantic salmon, Salmo salar L by Fraser, T W K, Mayer, I, Hansen, T, Poppe, T T, Skjæraasen, J E, Koppang, E O, Fjelldal, P G

“…Heart morphology is particularly plastic in teleosts and differs between farmed and wild Atlantic salmon. However, little is known about how different culture…”
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Timecourse of oocyte development in saithe Pollachius virens by Skjæraasen, J. E., Devine, J. A., Godiksen, J. A., Fonn, M., OtterÅ, H., Kjesbu, O. S., Norberg, B., Langangen, Ø., Karlsen, Ø.

“…Wild caught North Sea saithe Pollachius virens were monitored for growth, sex steroid profiles and oocyte development pre‐spawning and measured for egg size…”
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Mating competition between farmed and wild cod Gadus morhua by Skjæraasen, JE, Meager, JJ, Karlsen, Ø, Mayer, I, Dahle, G, Rudolfsen, G, Fernö, A

“…Increasing numbers of hatchery-produced fish entering marine environments has caused concern over potential fitness depressions in wild populations, yet no…”
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Behavioural responses of hatchery-reared and wild cod Gadus morhua to mechano-acoustic predator signals by Meager, J. J., Rodewald, P., Domenici, P., Fernö, A., Järvi, T., Skjæraasen, J. E., Sverdrup, G. K.

“…The behavioural responses of wild (predator‐experienced) and hatchery‐reared (predator‐naive) cod Gadus morhua to standardized mechano‐acoustic (MA) stimuli…”
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Hypoxic avoidance behaviour in cod ( Gadus morhua L.): The effect of temperature and haemoglobin genotype by Skjæraasen, J.E., Nilsen, T., Meager, J.J., Herbert, N.A., Moberg, O., Tronci, V., Johansen, T., Salvanes, A.G.V.

“…Hypoxia can influence fish growth, survival and on larger scales, population structure. These effects may be influenced by water temperature, and may vary…”
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Recovery from handling stress in Gadus morhua by Artigas, M. L., Skjæraasen, J. E., Utne-Palm, A. C., Nilsen, T.

“…The time needed for juvenile cod Gadus morhua to recover from handling stress, and also whether observer presence or haemoglobin genotype influenced recovery…”
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Vaccination and triploidy increase relative heart weight in farmed A tlantic salmon, S almo salar L by Fraser, T W K, Mayer, I, Hansen, T, Poppe, T T, Skjæraasen, J E, Koppang, E O, Fjelldal, P G

“…Abstract Heart morphology is particularly plastic in teleosts and differs between farmed and wild A tlantic salmon. However, little is known about how…”
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Mating competition between farmed and wild codGadus morhua by Skjæraasen, J. E., Meager, J. J., Karlsen, Ø., Mayer, I., Dahle, G., Rudolfsen, G., Fernö, A.

“…Increasing numbers of hatchery-produced fish entering marine environments has caused concern over potential fitness depressions in wild populations, yet no…”
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Sub-populations of coastal cod with different behaviour and life-history strategies by Salvanes, Anne Gro Vea, Skjæraasen, Jon Egil, Nilsen, Trygve

“…This study provides evidence of countergradient variations in life-history traits among coastal codGadus morhuaoff the Norwegian coast, suggesting the…”
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Distribution and feeding ecology of Raja radiata in the northeastern North Sea and Skagerrak (Norwegian Deep) by Skjæraasen, J. E., Bergstad, O. A.

“…The distribution and feeding ecology of Raja radiata in the deeper parts of the northeastern North Sea and Skagerrak (i.e. the Norwegian Deep) are described…”
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Morphological and behavioural correlates of reproductive success in Atlantic cod Gadus morhua by Rowe, S, Hutchings, JA, Skjæraasen, JE, Bezanson, L

“…We tested the hypothesis that reproductive success is randomly distributed within spawning aggregations of Atlantic cod Gadus morhua, a broadcast-spawning…”
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The isolation of Atlantic cod, Gadus morhua (Gadiformes), populations in Northern Meromictic lakes—A recurrent arctic phenomenon by Hardie, D. C., Renaud, C. B., Ponomarenko, V. P., Mukhina, N. V., Yaragina, N. A., Skjæraasen, J. E., Hutchings, J. A.

“…Although it has previously been considered to be a rare phenomenon, this paper provides evidence of eight occurrences of Atlantic cod in northern coastal…”
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Countergradient variation in behaviour, growth and lipid storage in Atlantic cod; environmental and genetic effects by Salvanes, A. G. V., Skjæraasen, J. E., Nilsen, T.

“…We housed offspring from northern (70° N) and southern (60° N) coastal cod (Gadus morhua) together in a ‘common garden’ rearing experiment at a temperature and…”
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