Blar i NTNU Open på forfatter "Power, Michael"
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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, ... -
A dated volcano-tectonic deformation event in Jan Mayen causing landlocking of Arctic charr
Larsen, Eiliv; Lyså, Astrid; Höskuldsson, Ármann; Davidsen, Jan Grimsrud; Nadeau, Marie-Josée; Power, Michael; Tassis, Georgios; Wastegård, Stefan (Peer reviewed; Journal article, 2021)We provide the first documentation of tectonic deformation resulting from a volcanic eruption on the island of Jan Mayen. Vertical displacement of about 14 m southwest of the stratovolcano Beerenberg is associated with an ... -
Hydropower impacts on reservoir fish populations are modified by environmental variation
Eloranta, Antti; Finstad, Anders Gravbrøt; Helland, Ingeborg Palm; Ugedal, Ola; Power, Michael (Journal article; Peer reviewed, 2018)Global transition towards renewable energy production has increased the demand for newand more flexible hydropower operations. Beforemanagement and stakeholders can make informed choices on potential mitigations, it is ... -
Impacts of piscicide-induced fish removal on resource use and trophic diversity of lake invertebrates
Eloranta, Antti; Kjærstad, Gaute; Power, Michael; Lakka, Hanna-Kaisa; Arnekleiv, Jo Vegar; Finstad, Anders Gravbrøt (Peer reviewed; Journal article, 2022)Chemical eradication of non-native species has become a widely used method to mitigate the potential negative im- pacts of altered competitive or predatory dynamics on biodiversity and natural ecosystem processes. However, ... -
Impacts of reduced Lepidurus arcticus availability on brown trout life history traits in a mountain reservoir
Lakka, Hanna-Kaisa; Eloranta, Antti; Hesthagen, Trygve H.; Saksgård, Randi J.; Power, Michael (Peer reviewed; Journal article, 2020)Lepidurus arcticus (the Arctic tadpole shrimp) is a vulnerable keystone species in Arctic and alpine water bodies where its occurrence and population size may influence the viability and life history traits of resident ... -
Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake
Eloranta, Antti; Johnsen, Stein Ivar; Power, Michael; Bærum, Kim Magnus; Sandlund, Odd Terje; Finstad, Anders Gravbrøt; Rognerud, Sigurd; Museth, Jon (Journal article; Peer reviewed, 2018)Invasive and introduced fishes can affect recipient ecosystems and native species via altered competitive and predatory interactions, potentially leading to top-down and bottom-up cascading impacts. Here, we describe a ... -
Marine trophic niche-use and life history diversity among Arctic charr Salvelinus alpinus in southwestern Greenland
Davidsen, Jan Grimsrud; Power, Michael; Knudsen, Rune; Sjursen, Aslak Darre; Rønning, Lars; Kjærstad, Gaute; Arnekleiv, Jo Vegar (Journal article; Peer reviewed, 2020)Life history strategies and potential marine niche use of Arctic charr Salvelinus alpinus (n = 237, 84–652 mm, total body length, LT) were determined during the ice‐free season (2012) at three different watercourses in ... -
One Hundred Pressing Questions on the Future of Global Fish Migration Science, Conservation, and Policy
Lennox, Robert J.; Paukert, Craig P.; Aarestrup, Kim; Auger-Méthé, Marie; Baumgartner, Lee; Birnie-Gauvin, Kim; Bøe, Kristin; Brink, Kerry; Brownscombe, Jacob W.; Chen, Yushun; Davidsen, Jan Grimsrud; Eliason, Erika J.; Filous, Alexander; Gillanders, Bronwyn M.; Helland, Ingeborg Palm; Horodysky, Andrij Z.; Januchowski-Hartley, Stephanie R.; Lowerre-Barbieri, Susan K.; Lucas, Martyn C.; Martins, Eduardo G.; Murchie, Karen J.; Pompeu, Paulo S.; Power, Michael; Raghavan, Rajeev; Rahel, Frank J.; Secor, David; Thiem, Jason D.; Thorstad, Eva Bonsak; Ueda, Hiroshi; Whoriskey, Frederick G.; Cooke, Steven J. (Journal article; Peer reviewed, 2019)Migration is a widespread but highly diverse component of many animal life histories. Fish migrate throughout the world’s oceans, within lakes and rivers, and between the two realms, transporting matter, energy, and other ... -
Perspectives on the environmental implications of sustainable hydro-power: comparing countries, problems and approaches
Alfredsen, Knut; Helland, Ingeborg Palm; Martins, Eduardo G.; Power, Michael (Peer reviewed; Journal article, 2022)Perspectives on the Environmental Implications of Sustainable Hydropower gathers scientific papers from three of the worlds most important hydropower producers to discuss aspects of sustainable hydropower and the means by ... -
Trophic niche similarity among sea trout Salmo trutta in Central Norway investigated using different time-integrated trophic tracers
Davidsen, Jan Grimsrud; Knudsen, Rune; Power, Michael; Sjursen, Aslak Darre; Rønning, Lars; Hårsaker, Karstein; Næsje, Tor; Arnekleiv, Jo Vegar (Journal article; Peer reviewed, 2017)From 2011 to 2013, anadromous brown trout Salmo trutta (213−730 mm, total body length, LT) were collected during or shortly after their marine feeding migration at 7 different localities in central Norway. The mean volume ...