Search Results - "Borgstrøm, Reidar"

Annual growth of brown trout in alpine lakes is highly influenced by spring snow depth and ice-out day by Borgstrøm, Reidar

“…Growth of annular zones in otoliths of brown trout from the alpine lakes Litlosvatn and Kollsvatn on western part of the Hardangervidda mountain plateau have…”
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Bioaccumulation of persistent organic pollutants (POPs) in fish species from Lake Koka, Ethiopia: The influence of lipid content and trophic position by Deribe, Ermias, Rosseland, Bjørn Olav, Borgstrøm, Reidar, Salbu, Brit, Gebremariam, Zinabu, Dadebo, Elias, Norli, Hans Ragnar, Eklo, Ole Martin

“…The concentrations and bioaccumulation of persistent organic pollutants (POPs) were determined in four fish species from Lake Koka, Ethiopia, representing 2–3…”
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Biomagnification of DDT and its metabolites in four fish species of a tropical lake by Deribe, Ermias, Rosseland, Bjørn Olav, Borgstrøm, Reidar, Salbu, Brit, Gebremariam, Zinabu, Dadebo, Elias, Skipperud, Lindis, Eklo, Ole Martin

“…The concentrations and biomagnifications of dichlorodiphenyltrichloroethane (DDT) and its metabolites were examined in four fish species (Clarias gariepinus,…”
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Expected Climate Change in the High Arctic—Good or Bad for Arctic Charr? by Svenning, Martin A., Bjørvik, Eigil T., Godiksen, Jane A., Hammar, Johan, Kohler, Jack, Borgstrøm, Reidar, Yoccoz, Nigel G.

“…Lakes in the High Arctic are characterized by their low water temperature, long-term ice cover, low levels of nutrients, and low biodiversity. These conditions…”
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First records of three-spined stickleback Gasterosteus aculeatus in Svalbard freshwaters: An effect of climate change? by Svenning, Martin-A, Aas, Morten, Borgstrøm, Reidar

“…Several fish species, including three-spined stickleback, Gasterosteus aculeatus , have shown a more northerly distribution in the Norwegian Sea into the…”
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Introduced European minnow Phoxinus phoxinus in alpine lakes may increase total mercury concentration in brown trout Salmo trutta by Borgstrøm, Reidar, Rognerud, Sigurd, Meland, Sondre, Rosseland, Bjørn Olav

“…In Norway, the cyprinid European minnow Phoxinus phoxinus has been spread far outside its previous natural distribution area, with lots of establishments in…”
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Organochlorine Pesticides and Polychlorinated Biphenyls in Fish from Lake Awassa in the Ethiopian Rift Valley: Human Health Risks by Deribe, Ermias, Rosseland, Bjørn Olav, Borgstrøm, Reidar, Salbu, Brit, Gebremariam, Zinabu, Dadebo, Elias, Skipperud, Lindis, Eklo, Ole Martin

“…Dietary intake of fish containing organic contaminants poses a potential threat to human health. In the present work, an assessment has been carried out to…”
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The helminth fauna of brown trout (Salmo trutta) from a sub-alpine lake revisited after 40 years with introduced European minnow (Phoxinus phoxinus) by Borgstrøm, Reidar, Hatleli Mestrand, Øyvind, Brittain, John E., Lien, Leif

“…The helminth fauna of brown trout (Salmo trutta) in the Norwegian subalpine lake, Øvre Heimdalsvatn was studied by examination of gills, eyes, body cavity,…”
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Lower than expected mercury concentration in piscivorous African sharptooth catfish Clarias gariepinus (Burchell) by Desta, Zerihun, Borgstrøm, Reidar, Rosseland, Bjørn Olav, Dadebo, Elias

“…The concentrations of total mercury (THg), stable isotopes of nitrogen (δ 15N) and carbon (δ 13C), and the diet of the African sharptooth catfish Clarias…”
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Gillnet catchability of brown trout Salmo trutta is highly dependent on fish size and capture site by Borgstrøm, Reidar, Bergum, Knut, Børresen, Trond Erik, Svenning, Martin A.

“…Use of experimental gillnet fleets is common both in scientific studies of fish populations and in fishsampling for management purposes. Fish catchability may…”
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Microsatellite DNA used for parentage identification of partly digested Atlantic salmon ( Salmo salar ) juveniles through non-destructive diet sampling in salmonids by Skaala, Øystein, Glover, Kevin A., Barlaup, Bjørn T., Borgstrøm, Reidar

“…Predation during early life history is an important component of fitness in salmonids. Farmed Atlantic salmon display lower survival in the wild in comparison…”
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Marine organisms transported by seabirds may contribute significantly to Arctic charr diet in coastal High-Arctic lakes by Svenning, Martin-A., Borgstrøm, Reidar

“…The rich marine resources along the western coast of Spitsbergen (Svalbard) have given rise to colonies of breeding seabirds, which likely represent an…”
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Habitat segregation by sympatric juvenile Arctic charr and brown trout in shallow lake areas: a consequence of interspecific differences in predator avoidance? by Svenning, Martin-A., Stien, Audun, Borgstrøm, Reidar

“…In sympatry, juvenile brown trout ( Salmo trutta ) usually occupy the shallow and most productive areas (littoral zone) of lakes, while juveniles of Arctic…”
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Mysis segerstralei, an unexpected but important prey for resident Arctic charr (Salvelinus alpinus) in a Svalbard lake by Svenning, Martin-A., Skogstad, Ole Christian, Skogstad, Øyvind, Borgstrøm, Reidar

“…Mysis segerstralei is distributed over a wide geographic area and in habitats with a variety of salinity conditions, including marine and brackish waters…”
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An extensive common‐garden study with domesticated and wild Atlantic salmon in the wild reveals impact on smolt production and shifts in fitness traits by Skaala, Øystein, Besnier, Francois, Borgstrøm, Reidar, Barlaup, BjørnTorgeir, Sørvik, Anne Grete, Normann, Eirik, Østebø, Britt Iren, Hansen, Michael Møller, Glover, Kevin Alan

“…Interactions between domesticated escapees and wild conspecifics represent a threat to the genetic integrity and fitness of native populations. For Atlantic…”
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The Hardangervidda wild reindeer herd: a problematic management history by Bjerketvedt, Dag K., Reimers, Eigil, Parker, Howard, Borgstrøm, Reidar

“…The unique and internationally important wild reindeer Rangifer tarandus herd on the Hardangervidda plateau of southern Norway  has shown frequent and extreme…”
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Time series covering up to four decades reveals major changes and drivers of marine growth and proportion of repeat spawners in an Atlantic salmon population by Harvey, Alison, Skaala, Øystein, Borgstrøm, Reidar, Fjeldheim, Per Tommy, Christine Andersen, Kaja, Rong Utne, Kjell, Askeland Johnsen, Ingrid, Fiske, Peder, Winterthun, Synne, Knutar, Sofie, Sægrov, Harald, Urdal, Kurt, Alan Glover, Kevin

“…Wild Atlantic salmon populations have declined in many regions and are affected by diverse natural and anthropogenic factors. To facilitate management…”
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The trophic niche of Arctic charr in large southern Scandinavian lakes is determined by fish community and lake morphometry by Sandlund, Odd Terje, Eloranta, Antti P., Borgstrøm, Reidar, Hesthagen, Trygve, Johnsen, Stein I., Museth, Jon, Rognerud, Sigurd

“…The influence of interspecific interactions and habitat characteristics on the ecological niche of species’ populations is a controversial issue in ecology. We…”
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Mercury concentrations are low in commercial fish species of Lake Ziway, Ethiopia, but stable isotope data indicated biomagnification by Tadiso, Tariku Markos, Borgstrøm, Reidar, Rosseland, Bjørn Olav

“…Stable isotope ratios of nitrogen ( δ 15N) and carbon ( δ 13C), complemented by stomach content data, were used to assess the food web structure and trophic…”
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Parallelism in thermal growth response in otoliths and scales of brown trout (Salmo trutta L.) from alpine lakes independent of genetic background by Thaulow, Jens, Haugen, Thrond O., Borgstrøm, Reidar

“…Low density in natural populations of salmonids has predominantly been managed by stocking of non‐native conspecifics. Due partly to domestication, introduced…”
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