A5005096188- Fish Ecology and Management Studies
- Marine and fisheries research
- Research in Social Sciences
- Aquatic Invertebrate Ecology and Behavior
- Genetic diversity and population structure
- Genetic and phenotypic traits in livestock
- Environmental DNA in Biodiversity Studies
- Fish Biology and Ecology Studies
- Ecology and biodiversity studies
- Soil and Water Nutrient Dynamics
- Hydrology and Sediment Transport Processes
- Animal Behavior and Reproduction
- Isotope Analysis in Ecology
- Forest Management and Policy
- Marine Bivalve and Aquaculture Studies
- Forest Ecology and Biodiversity Studies
- Aquaculture Nutrition and Growth
- Food Supply Chain Traceability
- Identification and Quantification in Food
- Wildlife Ecology and Conservation
- Reproductive biology and impacts on aquatic species
- Water Quality and Resources Studies
- Molecular Biology Techniques and Applications
- Arctic and Antarctic ice dynamics
- Data Analysis with R
Natural Resources Institute Finland
2016-2025
University of Oulu
2017-2019
Finland University
2018
Norwegian Institute for Nature Research
2006-2007
Fisheries and Oceans Canada
2006
Delaying sexual maturation can lead to larger body size and higher reproductive success, but carries an increased risk of death before reproducing. Classical life history theory predicts that trade-offs between success survival should the evolution optimal strategy in a given population. However, variation mating strategies generally persists, general, there remains poor understanding genetic physiological mechanisms underlying this variation. One extreme case is Atlantic salmon (Salmo...
Understanding the drivers of evolution is a fundamental aim in biology. However, identifying evolutionary impacts human activities challenging because lack temporal data and limited knowledge genetic basis most traits. Here, we identify toward maturity at an earlier age Atlantic salmon through two types fisheries-induced acting opposing directions: indirect effect linked with harvest prey species (capelin) sea (selection against late maturation) direct due to net fishing rivers early...
We used over 154 000 scale samples collected from salmon fisheries in the large River Teno system a 40-year period to quantify life history diversity and long-term trends. identified 120 different strategies, including combinations of smolt (2–8) sea ages (1–5) previous spawning events. Most strategies were rare; 60% individuals matured after 1 year at following 3–5 years fresh water. Age maturity changed with an increase two-sea-winter spawners decline three-sea-winter fish. Smolt age...
A long-held, but poorly tested, assumption in natural populations is that individuals disperse into new areas for reproduction are at a disadvantage compared to reproduce their natal habitat, underpinning the eco-evolutionary processes of local adaptation and ecological speciation. Here, we capitalize on fine-scale population structure dispersal events compare reproductive success dispersing captured same spawning ground four consecutive parent-offspring cohorts wild Atlantic salmon (Salmo...
Elucidating the genetic basis of adaptation to local environment can improve our understanding how diversity life has evolved. In this study, we used a dense SNP array identify candidate loci potentially underlying fine-scale within large Atlantic salmon (Salmo salar) population. By combining outlier, gene-environment association and haplotype homozygosity analyses, identified multiple regions genome with strong evidence for diversifying selection. Several these had previously been in other...
Despite decades of research assessing the genetic structure natural populations, biological meaning low yet significant divergence often remains unclear due to a lack associated phenotypic and ecological information. At same time, structured populations with overlapping boundaries can potentially provide excellent models study adaptation reproductive isolation in cases where high-resolution markers relevant life history information are available. Here, we combined single nucleotide...
Addressing biocomplexity in fisheries management is a challenge requiring an ability to differentiate among distinct populations contributing fisheries. We produced extensive genetic baseline data involving 36 sampling locations and 33 microsatellite markers, which allowed characterization of the structure diversity large Atlantic salmon (Salmo salar) population complex River Teno system, northernmost Europe. Altogether, we identified 28 hierarchically structured genetically segments (global...
This paper summarizes the objectives, activities initiated and approaches used in developing Atlantic salmon stock re-building programmes three large river systems northern Finland order to identify priorities for research management further restoration rehabilitation steps. Until recently, these historically renowned major rivers have been harnessed hydropower 40–60 years without provisions fish passage. Hydropower companies are obliged compensate losses caused by dam construction annual...
In Teno River, annual sonar monitoring is used to estimate the abundance of three salmonid species: Atlantic salmon, pink salmon and sea trout. However, size distribution these species partially overlapping making recognition impossible from plain data. A Bayesian model was developed tackle this problem migration timing for species. The integrates multiple sources data including catch, video count, daily average school sizes expert knowledge. Given limited catch statistics 2021, use...
Spawning migration timing of maiden Atlantic salmon Salmo salar and previous spawners was analysed in the catches 1989–2004 large subarctic River Teno northernmost parts Finland Norway. The hypothesis that their counterparts is similar, with similar between sexes. In most cases, however, were observed to migrate into its tributaries earlier than counterparts. difference run especially evident one‐sea‐winter (1SW) corresponding group [1S1, 1 year at sea (1) followed by first spawning (S)...
DNA extracted from historical samples is an important resource for understanding genetic consequences of anthropogenic influences and long-term environmental change. However, such generally yield a lower amount quality, the extent to which degradation affects SNP genotyping success allele frequency estimation not well understood. We conducted high density in both individual pooled dried Atlantic salmon (Salmo salar) scales stored at room temperature up 35 years, assessed success,...
Abstract We report on the data from an extensive monitoring programme for occurrence of escaped farmed Atlantic salmon (Salmo salar) in Norwegian rivers 25 years. This started as a 3-year research 1989 and was followed by management authorities to cover proportional during summer autumn before spawning. Farmed were distinguished wild growth patterns scales. More than 362 000 registered this programme. Here we present historical catches 1989–2013 methodology calculating averages across...
Abstract Many wild Atlantic salmon ( Salmo salar ) populations are threatened by introgressive hybridization from domesticated fish that have escaped aquaculture facilities. A detailed understanding of the dynamics between and escapees requires discrimination different hybrid classes; however, markers currently available to discriminate two types parental genome limited power do this. Using a high‐density single nucleotide polymorphism SNP array, in combination with pooled‐sample...
Abstract Co‐inheritance in life‐history traits may result unpredictable evolutionary trajectories if not accounted for models. Iteroparity (the reproductive strategy of reproducing more than once) Atlantic salmon ( Salmo salar ) is a fitness trait with substantial variation within and among populations. In the Teno River northern Europe, iteroparous individuals constitute an important component many populations have experienced sharp increase abundance last 20 years, partly overlapping...
Abstract In species with complex life cycles, history theory predicts that fitness is affected by conditions encountered in previous stages. Here, we use a 4‐year pedigree to investigate if time spent two distinct stages has sex‐specific reproductive consequences anadromous Atlantic salmon ( Salmo salar ). We determined the amount of years fresh water as juveniles (freshwater age, FW, measured years), and marine environment adults (sea SW, sea winters) on 264 sexually mature collected river...
Linking reproductive fitness with adaptive traits at the genomic level can shed light on mechanisms that produce and maintain sex-specific selection. Here, we construct a multigenerational pedigree to investigate selection maturation gene, vgll3, in wild Atlantic salmon population. The vgll3 locus is responsible for ~40% of variation (sea age first reproduction). Genetic parentage analysis was conducted 18,265 juveniles (parr) 685 adults collected same spawning ground over eight consecutive...
ABSTRACT Large main stem rivers typically provide a variety of mesohabitat types, but their abundance, distribution and role in providing habitat for juvenile salmonids have rarely been analysed. The quantity meso‐scale habitats Atlantic salmon abundance was surveyed the large sub‐arctic River Teno northernmost Fennoscandia. Different types were mapped using Norwegian Mesohabitat Classification Method (NMCM). Juvenile different mesohabitats, on various substrates, depths lateral positions...
Seasonal and diel migration timing of wild Atlantic salmon Salmo salar smolts adults were investigated annually (2001–2004) in the subarctic River Utsjoki, a tributary large Teno (70° N), using underwater video monitoring. Submerged cameras provided information on exact intensity both migrations natural river channel, without disturbing fish. In contrast to mainly nocturnal pattern described from temperate rivers, Utsjoki migrated throughout day. Smolts most intensively during hours rising...
Connectivity problems in fish migration regulated rivers have been widely studied, but few studies rigorously compared parallel success between and free-flowing rivers. Here, survival speed of downstream migrating radio-tagged Atlantic salmon (Salmo salar) smolts were studied two large neighboring the northern Baltic Sea area: one without with dams. Both a upper section, where similar. Survival along lower section river was about six times higher than part five hydropower plants. Migration...
Abstract Climate change, biological invasions, and anthropogenic disturbance pose a threat to the biodiversity function of Arctic freshwater ecosystems. Understanding potential changes in fish species distribution richness is necessary, given great importance ecosystems as resource humans. However, information gaps limit large‐scale studies our ability determine patterns trends space time. This study takes first step determining circumpolar composition, which provides baseline improve both...
Climate change and anthropogenic activities have impacts on fish habitat suitability, demanding more accurate modeling of species abundance for effective conservation management. In this study, we applied Machine Learning techniques to model the habitat-abundance relationship juvenile Atlantic salmon (Salmo salar) in Teno catchment Finland Norway. To capture complexity nonlinearity relationship, employed Support Vector Regression (SVR), Random Forest (RF), Gradient Boosting (GB),...