Blar i NTNU Vitenskapsmuseet (VM) på forfatter "Eldøy, Sindre Håvarstein"
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Acoustic accelerometer transmitters and their growing relevance to aquatic science
Lennox, Robert; Eldøy, Sindre Håvarstein; Dahlmo, Lotte Svengård; Matley, Jordan K.; Vollset, Knut (Peer reviewed; Journal article, 2023)There has recently been great interest in the use of accelerometers onboard electronic transmitters to characterise various aspects of the ecology of wild animals. We review use cases and outline how these tools can provide ... -
The Biology and feeding Ecology of Arctic charr in the Kerguelen Islands
Eldøy, Sindre Håvarstein; Davidsen, Jan Grimsrud; Vignon, Matthias; Power, Michael (Peer reviewed; Journal article, 2020)Subsequent to their introduction in the 1950s, Arctic charr Salvelinus alpinus have been able to establish a self‐sustaining population that has adapted to the unique conditions of the sub‐Antarctic Kerguelen Islands. Here, ... -
Brown trout (Salmo trutta L. 1758) and Arctic charr (Salvelinus alpinus (L. 1758)) display different marine behaviour and feeding strategies in sympatry
Davidsen, Jan Grimsrud; Halvorsen, Andrine Emilie; Eldøy, Sindre Håvarstein; Thorstad, Eva Bonsak; Vøllestad, Leif Asbjørn (Peer reviewed; Journal article, 2023)Brown trout (Salmo trutta L. 1758) and Arctic charr (Salvelinus alpinus (L. 1758)) tagged with acoustic transmitters migrated from freshwater to the sea mainly in May and June, but with large individual variation in migration ... -
Changes in growth and migration patterns of sea trout before and after the introduction of Atlantic salmon farming
Eldøy, Sindre Håvarstein; Ryan, Diarmuid; Roche, William; Thorstad, Eva Bonsak; Næsje, Tor; Sjursen, Aslak Darre; Gargan, Paddy; Davidsen, Jan Grimsrud (Peer reviewed; Journal article, 2020)Marine growth has strong implications for reproductive potential and ultimate fitness of sea trout. Hence, the effects of anthropogenic factors on marine growth are important when evaluating population responses and ... -
The effects of nutritional state, sex and body size on the marine migration behaviour of sea trout
Eldøy, Sindre Håvarstein; Bordeleau, Xavier; Lawrence, M. J.; Thorstad, Eva B.; Finstad, Anders Gravbrøt; Whoriskey, Frederick G.; Crossin, Glenn T; Cooke, Steven J.; Aarestrup, Kim; Rønning, Lars; Sjursen, Aslak Darre; Davidsen, Jan Grimsrud (Peer reviewed; Journal article, 2021)The sea trout (anadromous brown trout Salmo trutta) displays extensive among-individual variation in marine migration behaviour. We studied the migration behaviour of 286 sea trout (27-89 cm) tagged with acoustic transmitters ... -
How pathogens affect the marine habitat use and migration of sea trout (Salmo trutta) in two Norwegian fjord systems
Lennox, Robert J.; Eldøy, Sindre Håvarstein; Vollset, Knut; Miller, Kristi M.; Li, Shaorong; Kaukinen, Karia H.; Isaksen, Trond Einar; Davidsen, Jan Grimsrud (Peer reviewed; Journal article, 2020)Wild fish are confronting changing pathogen dynamics arising from anthropogenic disturbance and climate change. Pathogens can influence animal behaviour and life histories, yet there are little such data from fish in the ... -
Individual repeatability in marine migratory behaviour: A multi-population assessment of anadromous brown trout tracked through consecutive feeding migrations
Eldøy, Sindre Håvarstein; Bordeleau, Xavier; Crossin, Glenn T; Davidsen, Jan Grimsrud (Journal article; Peer reviewed, 2019)Despite that the study of individual repeatability is a common topic in behavioral ecology, virtually nothing is known about inter-annual variability in the marine migratory behavior of iteroparous salmonids that can ... -
Life-history strategies in salmonids: the role of physiology and its consequences
Birnie-Gauvin, Kim; Bordeleau, Xavier; Cooke, Steven J.; Davidsen, Jan Grimsrud; Eldøy, Sindre Håvarstein; Eliason, Erika; Moore, Andy; Aarestrup, Kim (Peer reviewed; Journal article, 2021)Salmonids are some of the most widely studied species of fish worldwide. They span freshwater rivers and lakes to fjords and oceans; they include short- and long-distance anadromous migrants, as well as partially migratory ... -
Marine depth use of sea trout Salmo trutta in fjord areas of Central Norway
Eldøy, Sindre Håvarstein; Davidsen, Jan Grimsrud; Thorstad, Eva Bonsak; Whoriskey, Frederick G.; Aarestrup, Kim; Næsje, Tor; Rønning, Lars; Sjursen, Aslak Darre; Rikardsen, Audun H.; Arnekleiv, Jo Vegar (Journal article; Peer reviewed, 2017)The vertical behaviour of 44 veteran sea trout Salmo trutta (275–580 mm) in different marine fjord habitats (estuary, pelagic, near shore with and without steep cliffs) was documented during May–February by acoustic ... -
Marine habitat use and feeding ecology of introduced anadromous brown trout at the colonization front of the sub-Antarctic Kerguelen archipelago
Davidsen, Jan Grimsrud; Bordeleau, Xavier; Eldøy, Sindre Håvarstein; Whoriskey, Frederick G.; Power, Michael John; Crossin, Glenn T; Buhariwalla, Colin; Gaudin, Philippe (Journal article; Peer reviewed, 2021)In 1954, brown trout were introduced to the Kerguelen archipelago (49°S, 70°E), a pristine, sub-Antarctic environment previously devoid of native freshwater fishes. Trout began spreading rapidly via coastal waters to ... -
Marine migration and habitat use of anadromous brown trout Salmo trutta
Eldøy, Sindre Håvarstein; Davidsen, Jan Grimsrud; Thorstad, Eva Bonsak; Whoriskey, F.; Aarestrup, K.; Næsje, Tor; Rønning, Lars; Sjursen, Aslak Darre; Rikardsen, Audun H.; Arnekleiv, Jo Vegar (Journal article, 2015)The biology and ecology of anadromous brown trout (Salmo trutta) at sea is poorly understood. This study provided information on spatial and temporal distribution of sea trout in the ocean. The behaviour of 115 individuals ... -
Marine vandringer og områdebruk hos sjøørret og sjørøye i Tosenfjorden
Davidsen, Jan Grimsrud; Eldøy, Sindre Håvarstein; Sjursen, Aslak Darre; Rønning, Lars; Bordeleau, Xavier; Daverdin, Marc; Bårdsen, Marthe Tangvold; Whoriskey, Frederick G.; Koksvik, Jan Ivar (NTNU Vitenskapsmuseet naturhistorisk rapport;, Research report, 2018) -
Nutritional correlates of spatiotemporal variations in the marine habitat use of brown trout (Salmo trutta) veteran migrants
Bordeleau, Xavier; Davidsen, Jan Grimsrud; Eldøy, Sindre Håvarstein; Sjursen, Aslak Darre; Whoriskey, Frederick G.; Crossin, Glenn T (Journal article; Peer reviewed, 2018)The brown trout (Salmo trutta) is an iteroparous, anadromous salmonid that exhibits a complex continuum of feeding migration tactics, ranging from freshwater residency, to potamodromy, to estuarine migration, as well as ... -
Områdebruk til sjøørret ved Ørin, Verdalselva
Davidsen, Jan Grimsrud; Sjursen, Aslak Darre; Rønning, Lars; Daverdin, Marc; Davidsen, Anette Sophie Grimsrud; Eldøy, Sindre Håvarstein (NTNU Vitenskapsmuseet naturhistorisk rapport, Research report, 2023) -
Overvåkning av anadrome laksefisk i Hopvassdraget, Nordland
Sjursen, Aslak Darre; Rønning, Lars; Eldøy, Sindre Håvarstein; Davidsen, Jan Grimsrud (NTNU Vitenskapsmuseet naturhistorisk notat;, Research report, 2024) -
Utbygging av ny E6 ved Hellstranda – kartlegging av områdebruk til sjøørret og laks, samt forslag til kompenserende tiltak
Davidsen, Jan Grimsrud; Sjursen, Aslak Darre; Rønning, Lars; Davidsen, Anette Sophie Grimsrud; Eldøy, Sindre Håvarstein; Daverdin, Marc; Kjærstad, Gaute (NTNU Vitenskapsmuseet naturhistorisk rapport;, Research report, 2021) -
Vandringsruter og områdebruk til sjøørret og laks i Beiarfjorden og ved Sandhornøya
Davidsen, Jan Grimsrud; Eldøy, Sindre Håvarstein; Steinkjer, Enghild Kristine; Nilsen, Håvard Vedeler; Sjursen, Aslak Darre; Daverdin, Marc; Norderud, Nanna; Rønning, Lars (NTNU Vitenskapsmuseet naturhistorisk rapport, Research report, 2022) -
Wild salmonids are running the gauntlet of pathogens and climate as fish farms expand northwards
Vollset, Knut; Lennox, Robert J.; Davidsen, Jan Grimsrud; Eldøy, Sindre Håvarstein; Isaksen, Trond Einar; Madhun, Abdullah Sami; Karlsson, Sten; Miller, Kristina M (Peer reviewed; Journal article, 2020)Salmon farming has multiplied from a side business of coastal farmers to one of the world's major aquaculture species. This has dramatically altered the disease dynamics between farmed and wild salmonids. As salmon fish ...