Search Results - "Hedger, R. D."

Heart rate and swimming activity as indicators of post-surgical recovery time of Atlantic salmon (Salmo salar) by Fare, M, Svendsen, E, Økland, F, Gräns, A, Alfredsen, J. A, Finstad, B, Hedger, R. D, Uglem, I

“…Background Fish telemetry using electronic transmitter or data storage tags has become a common method for studying free-swimming fish both in the wild and in…”
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Modeling salmon lice effects on sea trout population dynamics using an individual-based approach by Hedger, RD, Diserud, OH, Finstad, B, Jensen, AJ, Hendrichsen, DK, Ugedal, O, Næsje, TF

“…Salmon lice Lepeophtheirus salmonis infestation of sea trout Salmo trutta results in both additional marine mortality and behavioral changes which may…”
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Understanding and managing fish populations: keeping the toolbox fit for purpose by Paris, J. R., Sherman, K. D., Bell, E., Boulenger, C., Delord, C., El‐Mahdi, M. B. M., Fairfield, E. A., Griffiths, A. M., Gutmann Roberts, C., Hedger, R. D., Holman, L. E., Hooper, L. H., Humphries, N. E., Katsiadaki, I., King, R. A., Lemopoulos, A., Payne, C. J., Peirson, G., Richter, K. K., Taylor, M. I., Trueman, C. N., Hayden, B., Stevens, J. R.

“…Wild fish populations are currently experiencing unprecedented pressures, which are projected to intensify in the coming decades. Developing a thorough…”
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Residency and migratory behaviour by adult Pomatomus saltatrix in a South African coastal embayment by Hedger, R.D., Næsje, T.F., Cowley, P.D., Thorstad, E.B., Attwood, C., Økland, F., Wilke, C.G., Kerwath, S.

“…Acoustic telemetry was used to study patterns of habitat use and movements of Pomatomus saltatrix L. (common name elf/shad/bluefish/tailor) within the Saldanha…”
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Ice‐dependent winter survival of juvenile Atlantic salmon by Hedger, R. D., Næsje, T. F., Fiske, P., Ugedal, O., Finstad, A. G., Thorstad, E. B.

“…Changes in snow and ice conditions are some of the most distinctive impacts of global warming in cold temperate and Arctic regions, altering the environment…”
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Habitat selection by juvenile Atlantic salmon: the interaction between physical habitat and abundance by Hedger, R. D., Dodson, J. J., Bergeron, N. E., Caron, F.

“…The effect of physical river habitat variables on the distribution of juvenile Atlantic salmon Salmo salar L. in the Rivière de la Trinité, Québec, Canada, was…”
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Pop‐up satellite archival tag effects on the diving behaviour, growth and survival of adult Atlantic salmon Salmo salar at sea by Hedger, R. D., Rikardsen, A. H., Thorstad, E. B.

“…The effects of large, externally attached pop‐up satellite archival tags (PSATs) were compared with those of small implanted data storage tags (DSTs) on adult…”
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Modelling climate change effects on Atlantic salmon: Implications for mitigation in regulated rivers by Sundt-Hansen, L.E., Hedger, R.D., Ugedal, O., Diserud, O.H., Finstad, A.G., Sauterleute, J.F., Tøfte, L., Alfredsen, K., Forseth, T.

“…Climate change is expected to alter future temperature and discharge regimes of rivers. These regimes have a strong influence on the life history of most…”
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Improving models of juvenile Atlantic salmon habitat use through high resolution remote sensing by Hedger, R.D., Dodson, J.J., Bourque, J-F., Bergeron, N.E., Carbonneau, P.E.

“…The effect of spatial variation in substrate size on juvenile Atlantic salmon density in the Sainte-Marguerite, a major salmon-spawning river in QC, Canada,…”
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Diving and feeding of adult Atlantic salmon when migrating through the coastal zone in Norway by Hedger, R. D., Kjellman, M., Thorstad, E. B., Strøm, J. F., Rikardsen, A. H.

“…Atlantic salmon post-spawners from a population in northern Norway were tagged with data storage tags ( N  = 773), and the depth use and diving behaviour of…”
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River and estuary movements of yellow-stage American eels Anguilla rostrata, using a hydrophone array by Hedger, R. D., Dodson, J. J., Hatin, D., Caron, F., Fournier, D.

“…Patterns of summertime movement and habitat use of yellow‐stage American eels Anguilla rostrata within York River and estuary and Gaspé Bay (Gaspesia, Québec,…”
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Estimation of velocity fields at the estuary-coastal interface through statistical analysis of successive airborne remotely sensed images by Hedger, R. D., Malthus, T. J., Folkard, A. M.

“…The study of surface water velocity fields through in situ sampling is intrinsically difficult because they are highly variable in time and space. With…”
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Modelling the complete life-cycle of Atlantic salmon (Salmo salar L.) using a spatially explicit individual-based approach by Hedger, R.D., Sundt-Hansen, L.E., Forseth, T., Diserud, O.H., Ugedal, O., Finstad, A.G.

“…► Individual-based models of salmon population abundance should be spatially explicit. ► Sensitivity to parameters depends on developmental stage. ► Feedback…”
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Tracking escaped Atlantic cod (Gadus morhua L.) aggregated around Norwegian farms: Considerations for management strategies by Hedger, R. D., Serra‐Llinares, R. M., Arechavala‐Lopez, P., Nilsen, R., Bjørn, P. A., Uglem, I.

“…To examine site fidelity and potential for ecosystem impacts, 20 escapee cod (Gadus morhua L.) from fjord‐based cod farms were tagged with acoustic…”
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Behavioural transition during the estuarine migration of wild Atlantic salmon (Salmo salar L.) smolt by Martin, F, Hedger, R.D, Dodson, J.J, Fernandes, L, Hatin, D, Caron, F, Whoriskey, F.G

“…Ultrasonic telemetry and hydrodynamic modelling were used to study the migratory behaviour of 54 wild Atlantic salmon (Salmo salar) smolt captured in…”
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Quantifying the effectiveness of regional habitat quality index models for predicting densities of juvenile Atlantic salmon (Salmo salar L.) by Hedger, R. D., Dodson, J. J., Bergeron, N. E., Caron, F.

“…–  The suitability of using regional Habitat Quality Index (HQI) models for predicting distributions of juvenile salmon (Salmo salar L.) was examined using…”
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Anadromy and the dispersal of an invasive fish species (Oncorhynchus mykiss) in Eastern Quebec, as revealed by otolith microchemistry by Thibault, I., Hedger, R. D., Dodson, J. J., Shiao, J.-C., Iizuka, Y., Tzeng, W.-N.

“…Thibault I, Hedger RD, Dodson JJ, Shiao J‐C, Iizuka Y, Tzeng W‐N. Anadromy and the dispersal of an invasive fish species (Oncorhynchus mykiss) in Eastern…”
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Active migration of wild Atlantic salmon Salmo salar smolt through a coastal embayment by Hedger, RD, Martin, F, Hatin, D, Caron, F, Whoriskey, FG, Dodson, JJ

“…Migration patterns of wild Atlantic salmon Salmo salar smolt were examined in a coastal embayment in the Gaspe peninsula of Quebec, Canada. Twenty-four smolt…”
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Effects of salmon lice infection on the behaviour of sea trout in the marine phase by Gjelland, Karl Øystein, Serra-Llinares, Rosa Maria, Hedger, Richard David, Arechavala-Lopez, Pablo, Nilsen, Rune, Finstad, Bengt, Uglem, Ingebrigt, Skilbrei, Ove Tommy, Bjørn, Pål Arne

“…Salmon lice Lepeophtheirus salmonis Krøyer may affect survival and growth of anadromous salmonids through physiological stress and/or behavioural changes…”
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3D Numerical Modeling of MICROCYSTIS Distribution in a Water Reservoir by Olsen, Nils Reidar B, Hedger, Richard D, George, D. Glen

“…A 3D computational fluid dynamics program was used to calculate the wind-induced accumulation of phytoplankton in Eglwys Nynydd, a water supply reservoir in…”
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