Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Richard D. Hedger"'
Autor:
Audun H. Rikardsen, David Righton, John Fredrik Strøm, Eva B. Thorstad, Patrick Gargan, Timothy Sheehan, Finn Økland, Cedar M. Chittenden, Richard D. Hedger, Tor F. Næsje, Mark Renkawitz, Johannes Sturlaugsson, Pablo Caballero, Henrik Baktoft, Jan G. Davidsen, Elina Halttunen, Serena Wright, Bengt Finstad, Kim Aarestrup
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Abstract Determining the mechanisms driving range-wide reductions in Atlantic salmon marine survival is hindered by an insufficient understanding of their oceanic ecology and distribution. We attached 204 pop-up satellite archival tags to post-spawne
Externí odkaz:
https://doaj.org/article/edb32fb4e745485d97b59679c223e4e6
Autor:
Marcell Szabo-Meszaros, Ana T. Silva, Kim M. Bærum, Henrik Baktoft, Knut Alfredsen, Richard D. Hedger, Finn Økland, Karl Ø. Gjelland, Hans-Petter Fjeldstad, Olle Calles, Torbjørn Forseth
Publikováno v:
Water, Vol 13, Iss 9, p 1230 (2021)
Fish swimming performance is strongly influenced by flow hydrodynamics, but little is known about the relation between fine-scale fish movements and hydrodynamics based on in-situ investigations. In the presented study, we validated the etho-hydrauli
Externí odkaz:
https://doaj.org/article/ec57d336c64a44429bffa487002b9f9c
Publikováno v:
Ecohydrology.
Autor:
Richard D. Hedger, Ditte Katrine Hendrichsen, Bengt Finstad, Ola Håvard Diserud, Tor F. Næsje, Arne Jensen, Ola Ugedal
Publikováno v:
Aquaculture Environment Interactions, Vol 13, Pp 145-163 (2021)
Aquaculture Environment Interactions
Aquaculture Environment Interactions
Salmon lice Lepeophtheirus salmonis infestation of sea trout Salmo trutta results in both additional marine mortality and behavioral changes which may contribute to sea trout population decline. For effective management of activities that increase ex
Autor:
Finn Økland, Eirik Svendsen, Jo Arve Alfredsen, Bengt Finstad, Martin Føre, Richard D. Hedger, Ingebrigt Uglem, Albin Gräns
Publikováno v:
Animal Biotelemetry, Vol 9, Iss 1, Pp 1-13 (2021)
Animal Biotelemetry
Animal Biotelemetry
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 aquaculture. However, fish used in telemetry studies must be handled, anaesthetised and oft
Salmon louse infestation in wild brown trout populations generates multi-modal mixture distributions
Autor:
Ola Ugedal, Arne Jensen, Ditte Katrine Hendrichsen, Richard D. Hedger, Bengt Finstad, Ola Håvard Diserud
Publikováno v:
Aquaculture Environment Interactions, Vol 12, Pp 447-456 (2020)
Aquaculture Environment Interactions
Aquaculture Environment Interactions
For successful evaluation of the overall effects of salmon louse infestation on brown trout population dynamics, it is crucial to have a realistic understanding of how lice infestation distributions are generated and how they should be interpreted. H
Autor:
Johannes Sturlaugsson, Kim Aarestrup, Patrick G. Gargan, Mark D. Renkawitz, Tor F. Næsje, Bengt Finstad, Serena Wright, Finn Økland, John Fredrik Strøm, Henrik Baktoft, Cedar M. Chittenden, David Righton, Pablo Caballero, Elina Halttunen, Timothy F. Sheehan, Audun H. Rikardsen, Eva B. Thorstad, Jan Grimsrud Davidsen, Richard D. Hedger
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Scientific Reports
Rikardsen, A H, Righton, D, Strøm, J F, Thorstad, E B, Gargan, P, Sheehan, T, Økland, F, Chittenden, C M, Hedger, R D, Næsje, T F, Renkawitz, M, Sturlaugsson, J, Caballero, P, Baktoft, H, Davidsen, J G, Halttunen, E, Wright, S, Finstad, B & Aarestrup, K 2021, ' Redefining the oceanic distribution of Atlantic salmon ', Scientific Reports, vol. 11, 12266 . https://doi.org/10.1038/s41598-021-91137-y
Scientific Reports
Rikardsen, A H, Righton, D, Strøm, J F, Thorstad, E B, Gargan, P, Sheehan, T, Økland, F, Chittenden, C M, Hedger, R D, Næsje, T F, Renkawitz, M, Sturlaugsson, J, Caballero, P, Baktoft, H, Davidsen, J G, Halttunen, E, Wright, S, Finstad, B & Aarestrup, K 2021, ' Redefining the oceanic distribution of Atlantic salmon ', Scientific Reports, vol. 11, 12266 . https://doi.org/10.1038/s41598-021-91137-y
Determining the mechanisms driving range-wide reductions in Atlantic salmon marine survival is hindered by an insufficient understanding of their oceanic ecology and distribution. We attached 204 pop-up satellite archival tags to post-spawned salmon
Publikováno v:
Aquaculture Environment Interactions, Vol 11, Pp 149-160 (2019)
Aquaculture Environment Interactions
Aquaculture Environment Interactions
This is the first in-depth study which quantifies lice infestation levels on wild and farmed salmonids in a fjord system in Iceland (Arnarfjörður, Westfjords) and gives a baseline for the assessment of sea lice infestation within Icelandic fjords.
Autor:
Hans-Petter Fjeldstad, Knut Alfredsen, Ana T. Silva, Karl Øystein Gjelland, Marcell Szabo-Meszaros, Finn Økland, Olle Calles, Richard D. Hedger, Kim Magnus Bærum, Torbjørn Forseth, Henrik Baktoft
Publikováno v:
Water
Volume 13
Issue 9
Szabo-Meszaros, M, Silva, A T, Bærum, K M, Baktoft, H, Alfredsen, K, Hedger, R D, Økland, F, Gjelland, K, Fjeldstad, H P, Calles, O & Forseth, T 2021, ' Validation of a swimming direction model for the downstream migration of atlantic salmon smolts ', Water, vol. 13, no. 9, 1230 . https://doi.org/10.3390/w13091230
Water, Vol 13, Iss 1230, p 1230 (2021)
Volume 13
Issue 9
Szabo-Meszaros, M, Silva, A T, Bærum, K M, Baktoft, H, Alfredsen, K, Hedger, R D, Økland, F, Gjelland, K, Fjeldstad, H P, Calles, O & Forseth, T 2021, ' Validation of a swimming direction model for the downstream migration of atlantic salmon smolts ', Water, vol. 13, no. 9, 1230 . https://doi.org/10.3390/w13091230
Water, Vol 13, Iss 1230, p 1230 (2021)
Fish swimming performance is strongly influenced by flow hydrodynamics, but little is known about the relation between fine-scale fish movements and hydrodynamics based on in-situ investigations. In the presented study, we validated the etho-hydrauli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04be0477e92aae65c5350fed8a275837
https://hdl.handle.net/11250/2753744
https://hdl.handle.net/11250/2753744
Autor:
Martin Føre, Finn Økland, Ulf Erikson, Carolyn Rosten, Albin Gräns, Eirik Svendsen, Richard D. Hedger, Kevin Frank, Ingebrigt Uglem, Bengt Finstad, Jo Arve Alfredsen
Publikováno v:
Aquaculture
We investigated the relationship between telemetry measurements of heart rate and swimming activity and the physiological status in farmed Atlantic salmon (Salmo salar) to assess the potential to use telemetry measurements as proxies for stress. Sens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1244bef2a3986a0f5db47dd90c034b5f
https://hdl.handle.net/11250/2675581
https://hdl.handle.net/11250/2675581