Browsing Norsk institutt for naturforskning by Journals "Canadian Journal of Fisheries and Aquatic Sciences"
Now showing items 1-14 of 14
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Born to be wild: effects of rearing density and environmental enrichment on stress, welfare, and smolt migration in hatchery-reared Atlantic salmon
(Peer reviewed; Journal article, 2016)Hatchery-reared salmonids released into the wild generally have poor survivability compared with wild conspecifics. To assess potential hatchery rearing improvements, behavioral and physiological effects of reducing animal ... -
Climate-driven biophysical changes in feeding and breeding environments explain the decline of southernmost European Atlantic salmon populations
(Peer reviewed; Journal article, 2019)The consistency of the global declining trend of Atlantic salmon (Salmo salar) populations suggests that climate-driven reduced survival and growth at sea are the main driving factors. The southernmost populations have ... -
Density independent use of shallow riverine areas in juvenile Atlantic salmon
(Journal article; Peer reviewed, 2018)Habitat use of aquatic organisms is essential to evaluate effects of many environmental challenges like effects of hydro-power regulation, where stranding may occur under hydropeaking (rapid dewatering of shallow river ... -
Evidence for the linkage of survival of anadromous Arctic char and brown trout during winter to marine growth during the previous summer
(Journal article; Peer reviewed, 2017) -
Increasing water temperatures exacerbate the potential for density dependence in juvenile steelhead
(Journal article; Peer reviewed, 2017)We study the potential effects of predicted climate change on the energetic demands of juvenile steelhead (Oncorhynchus mykiss) and their consequences for local population size and structure in Idaho, USA. Projected increases ... -
Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon
(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 ... -
Introgression of non-native mitochondrial haplotypes from farmed to wild Atlantic salmon
(Peer reviewed; Journal article, 2023)Farmed salmon escape and interbreed with wild Atlantic salmon on a large scale. We studied introgression of mitochondrial haplotypes from farmed Atlantic salmon originating from the Eastern Atlantic phylogenetic group to ... -
Iteroparity and its contribution to life-history variation in Atlantic salmon
(Peer reviewed; Journal article, 2023)Evolution of iteroparity is shaped by the trade-off between current and future reproduction.We studied variation in iteroparity among 205 050 individual Atlantic salmon caught in 179 rivers spanning 14◦ of latitude. The ... -
Mortality of Atlantic salmon after catch and release angling: assessment of a recreational Atlantic salmon fishery in a changing climate
(Peer reviewed; Journal article, 2020)Human activities have the potential to accelerate population-level decline by contributing to climate warming and decreasing the capacity of species to survive warming temperatures. Here we build a predictive model to test ... -
A needle in a haystack: Strontium isotopes (87Sr/86Sr) in otoliths identify origin of Largemouth Bass from a large Southwest reservoir
(Peer reviewed; Journal article, 2023) -
Predation of Atlantic salmon across ontogenetic stages and impacts on populations
(Peer reviewed; Journal article, 2023)Managers and stakeholders increasingly ask whether predation is a driving force behind the poor status of many species, and whether predator control is likely to be a successful management action to intervene. We review ... -
Relationship between marine growth and sea survival of two anadromous salmonid fish species
(Journal article; Peer reviewed, 2017)This study found empirical evidence supporting the “growth–survival” paradigm in the marine phase of Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta). The paradigm postulates that larger or faster-growing ... -
Upstream fishway performance by Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) spawners at complex hydropower dams – is prior experience a success criterion?
(Peer reviewed; Journal article, 2020)Passage of hydropower plants by upstream-migrating salmonid spawners is associated with reduced migration success, and the need for knowledge of fish behavior downstream of dams is widely recognized. In this study, we ... -
Using scale-derived estimates of body size in analyses of Atlantic salmon life-history variation: a cautionary note
(Peer reviewed; Journal article, 2024)Measurements of individual body length at different life stages are critical in understanding fish ecology and evolution. Such data can be obtained via back-calculation from measurements of fish scales or by using the size ...