Blar i Scientific publications på forfatter "Foldvik, Anders"
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Acute toxicity testing of the tire rubber-derived chemical 6PPD-quinone on Atlantic salmon (Salmo salar) and brown trout (Salmo trutta)
Foldvik, Anders; Kryuchkov, Fedor; Sandodden, Roar; Uhlig, Silvio (Peer reviewed; Journal article, 2022)Recent identification of 6PPD-quinone as the chemical causing acute toxicity in coho salmon has led to substantial concern regarding toxicity of this contaminant for other aquatic species. Environmental occurrence of ... -
Association of landscape and environmental variables with the recruitment of the freshwater pearl mussel (Margaritifera margaritifera) in Norway
Gosselin, Marie-Pierre; Wacker, Sebastian; Magerøy, Jon Hamner; Foldvik, Anders; Larsen, Bjørn Mejdell (Peer reviewed; Journal article, 2023)Using data from 309 localities with freshwater pearl mussel, Margaritifera margaritifera, in Norway, we analyzed the effect of several landscape and environmental variables on this species’ recruitment. Median summer air ... -
Combining Fish Passage and Sediment Bypassing: A Conceptual Solution for Increased Sustainability of Dams and Reservoirs
Foldvik, Anders; Silva, Ana T.; Albayarak, Ismail; Schwarzwälder, Kordula Valerie Anne; Boes, Robert M.; Rüther, Nils (Peer reviewed; Journal article, 2022)Sedimentation is one of the main eco-morphological and technological challenges associated with reservoirs. Sedimentation not only reduces the functional capacity of a reservoir by filling it, but also changes downstream ... -
Comparing land use impacts using ecosystem quality, biogenic carbon emissions, and restoration costs in a case study of hydropower plants in Norway
Lillesund, Vilde Fluge; Hagen, Dagmar; Michelsen, Ottar; Foldvik, Anders; Barton, David Nicholas (Journal article; Peer reviewed, 2017)Purpose Habitat destruction is today the most severe threat to global biodiversity. Despite decades of efforts, there is still no proper methodology on how to assess all aspects of impacts on biodiversity from land use and ... -
Effects of episodic exposure to high-pH water on survival of Atlantic salmon eggs and juveniles: Results from laboratory and field Studies
Foldvik, Anders; Holthe, Espen; Bremset, Gunnbjørn; Solem, Øyvind (Peer reviewed; Journal article, 2022)Although effects of acidification on salmonidfish are well studied and documented, effects of episodic high pHhave rarely received attention. In the present study, we investigated effects of high‐pH events on Atlantic ... -
Individual recognition of Atlantic Salmon using iris biometry
Foldvik, Anders; Jakobsen, Frank; Ulvan, Eva Marita (Peer reviewed; Journal article, 2020)Traditional tagging methods for fishes can have issues relating to both animal welfare and economic costs. Biometric data such as iris patterns can be captured via digital cameras, which allows for non-invasive tagging and ... -
Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon
Teichert, Maxim; Foldvik, Anders; Einum, Sigurd; Finstad, Anders Gravbrøt; Forseth, Torbjørn; Ugedal, Ola (Journal article; Peer reviewed, 2017)Competition for limited resources and the resulting density-dependent processes are key factors in driving stream salmonid population dynamics. Here we test for the combined effects of density and shelter availability on ... -
Long‑term PIT tag retention rates in Atlantic salmon (Salmo salar)
Foldvik, Anders; Kvingedal, Eli (Journal article; Peer reviewed, 2018)Background: Passive integrated transponder (PIT) tags are widely used in studies of various aspects of fish survival, movement and behaviour. Quality of such studies depends on the fish retaining the tags over the study ... -
Natural and anthropogenic drivers of escaped farmed salmon occurrence and introgression into wild Norwegian Atlantic salmon populations
Diserud, Ola Håvard; Fiske, Peder; Karlsson, Sten; Glover, Kevin Alan; Næsje, Tor; Aronsen, Tonje; Bakke, Gunnar O; Barlaup, Bjørn Torgeir; Erkinaro, J.; Florø-Larsen, Bjørn; Foldvik, Anders; Heino, Mikko Petteri; Kanstad-Hanssen, Øyvind; Lo, Håvard; Lund, Roar Asbjørn; Muladal, R.; Niemela, E.; Økland, Finn; Østborg, Gunnel Marie; Otterå, Håkon Magne; Skaala, Øystein; Skoglund, Helge; Solberg, Ingrid; Solberg, Monica Favnebøe; Sollien, Vegard Pedersen; Sægrov, Harald; Urdal, Kurt; Wennevik, Vidar; Hindar, Kjetil (Peer reviewed; Journal article, 2022)Marine aquaculture of Atlantic salmon (Salmo salar) is a relatively new industry where breeding programs have led to rapid genetic change in the captive populations that were built up alongside conspecific wild individuals. ... -
Occurrence of the European eel in lakes in the northern part of its distribution area is limited to low-altitude coastal areas, likely due to topographical conditions
Foldvik, Anders; Ulvan, Eva M.; Thorstad, Eva B.; Hesthagen, Trygve (Peer reviewed; Journal article, 2019)With the decline of the European eel, protection measures in all parts of the eel’s distribution area may be increasingly important. Norway has a vast coastline (58°–71°N), but the distribution of eel has been largely ... -
Optimal timing of return migration in Atlantic salmon
Foldvik, Anders; Ulvan, Eva Marita; Næsje, Tor (Peer reviewed; Journal article, 2024)In many populations of Atlantic salmon, individuals return to rivers months or even a year prior to spawning. This premature arrival in fresh water by far exceeds the time needed for upstream migrations to spawning areas. ... -
Presence of 6PPD-quinone in runoff water samples from Norway using a new LC–MS/MS method
Kryuchkov, Fedor; Foldvik, Anders; Sandodden, Roar; Uhlig, Silvio (Peer reviewed; Journal article, 2023)The chemical 6PPD-quinone is highly toxic to some fish species of the Oncorhynchus and Salvelinus genera and is the oxidation product of the common car tire additive 6PPD. We present a new sample preparation method that ...