A5016245321- Physiological and biochemical adaptations
- Fish Ecology and Management Studies
- Aquaculture Nutrition and Growth
- Bat Biology and Ecology Studies
- Radiomics and Machine Learning in Medical Imaging
- Reproductive biology and impacts on aquatic species
- Animal Behavior and Reproduction
- Cardiovascular Disease and Adiposity
- Genetics, Aging, and Longevity in Model Organisms
- Marine and fisheries research
- Aquaculture disease management and microbiota
- Adipose Tissue and Metabolism
- Animal Genetics and Reproduction
- Neurobiology and Insect Physiology Research
University of Helsinki
2020-2025
Swedish University of Agricultural Sciences
2025
Norwegian University of Science and Technology
2020-2024
HiLIFE – Elämäntieteiden Instituutti
2023
Helsinki Institute of Physics
2020
Institut de Biologia Evolutiva
2020
Technical University of Denmark
2020
Significance Plastic individuals can buffer environmental changes, maintaining a stable performance across gradients. Plasticity is therefore thought to be particularly beneficial for the survival of wild populations that experience large fluctuations, such as diel and seasonal temperature changes. Maintaining plasticity widely assumed costly; however, empirical evidence demonstrating this cost scarce. Here, we predict if costly, it would readily lost in environment, laboratory. To test...
Abstract Temperature has a dramatic effect on the physiology of ectothermic animals, impacting most their biology. When temperatures increase above optimal for an animal, growth gradually decreases. The main mechanism behind this rate reduction is unknown. Here, we suggest ‘aerobic scope protection’ hypothesis as mechanistic explanation in growth. After meal, metabolic rate, and hence oxygen consumption transiently process called specific dynamic action (SDA). At warmer temperatures, SDA...
Abstract Age at maturity is a key life history trait involving trade-off between survival risk and reproductive investment, an important factor for population structures. In ectotherms, warming environment may have dramatic influence on development history, but this differ populations. While increasing number of studies examined population-dependent reactions with temperature, few investigated in the context maturation timing. Atlantic salmon, species high conservation relevance, good study...
Metabolic rates, including standard (SMR) and maximum (MMR) metabolic rate have often been linked with life-history strategies. Variation in context- tissue-level metabolism underlying SMR MMR may thus provide a physiological basis for variation. This raises hypothesis that tissue-specific covaries whole-animal rates is genetically to life history. In Atlantic salmon ( Salmo salar ), variation two loci, vgll3 six6 , affects history via age-at-maturity as well MMR. Here, using individuals...
A better understanding of the genetic and phenotypic architecture underlying life-history variation is a longstanding aim in biology. Theories suggest energy metabolism determines by modulating resource acquisition allocation trade-offs, but underpinnings relationship its dependence on ecological conditions have rarely been demonstrated. The strong determination age-at-maturity two unlinked genomic regions ( vgll3 six6 ) makes Atlantic salmon Salmo salar an ideal model to address these...
Critical thermal limits, commonly quantified as CTmax (maximum) or CTmin (minimum), are core metrics in the biology of aquatic ectotherms. CTmax, particular, has recently surged popularity due to its various applications, including understanding and predicting responses animals climate warming. Despite growing popularity, there is a limited literature aimed at establishing best practices for designing, running, reporting experiments. This lack standardisation insufficiently detailed creates...
Age at maturity is an important life-history trait, often showing sex-specific variation, contributing to diversity in many species. Atlantic salmon (Salmo salar) are excellent model system investigate genetic and environmental factors affecting maturation, yet few laboratory studies have focused on females as they mature later than males, average. Using a 4-year common-garden experiment of salmon, we assessed the influence diet (low-fat vs. control) vgll3 (a candidate gene influencing...
Tolerance against acute warming is an essential trait that can determine how organisms cope during heat waves, yet the mechanisms underlying it remain elusive. Water salinity has previously been suggested to modulate tolerance in fish and may therefore provide clues towards these limiting mechanisms. Here, using critical thermal maximum (CT max ) test, we investigated whether short (2 hours) long (10 days) term exposure different water salinities hours: 0–5 ppt, 10 days: 0–3 ppt) affected...
Sexual maturation is a key process in the life history of an organism and influenced by both genetic environmental factors. In Atlantic salmon (Salmo salar), alternative alleles at gene vgll3 have been found to associate with large proportion variation age, yet molecular physiological mechanisms this association are still largely unknown. Here, we investigated which major age-at-maturity translated into phenotypic variation. We established time series gonadal mRNA expression male female...
Temperature has a dramatic effect on the physiology of ectothermic animals, impacting most their biology.When temperatures increase above optimal for an animal, growth gradually decreases.The main mechanism behind this rate reduction is unknown.Here, we suggest 'aerobic scope protection' hypothesis as mechanistic explanation in growth.After meal, metabolic rate, and hence oxygen consumption transiently increases process called specific dynamic action (SDA).At warmer temperatures, SDA...
Abstract Atlantic salmon ( Salmo salar ) is a species with diverse life‐history strategies, to which the timing of maturation contributes considerably. Recently, genome region including gene vgll3 has gained attention as locus large effect on timing, and recent studies in have indicated that its might be mediated through body condition accumulation adipose tissue. However, cellular physiological pathways leading from genotype phenotype are still unknown. Standard metabolic rate potentially...
The environment experienced by a female influences reproductive traits in many species of fish. Environmental factors such as temperature and diet are not only important mediators maturation reproduction but also egg offspring fitness through maternal provisioning. In this study, we use 3-year-old tank-reared Atlantic salmon from two Finnish populations to investigate the effect on traits. We show that difference 2°C is sufficient delay whereas 22% reduction dietary energy content had no...
ABSTRACT Age at maturity is a key life history trait and involves trade-off between survival risk reproductive investment, has close connections to fitness, an important factor for population structures. Temperature can have dramatic influence on in ectotherms, but this may differ populations. While increasing number of studies examined population-dependent reactions with temperature, few investigated the context maturation timing. Atlantic salmon highly relevant study species improving...
Abstract A better understanding of the genetic and phenotypic architecture underlying life-history variation is a longstanding aim in biology. Theories suggest energy metabolism determines by modulating resource acquisition allocation trade-offs, but underpinnings relationship its dependence on ecological conditions have rarely been demonstrated. The strong determination age-at-maturity two unlinked genomic regions ( vgll3 six6 ) makes Atlantic salmon Salmo salar an ideal model to address...
Abstract Age at maturity is an important factor contributing to life-history diversity. In Atlantic salmon, this trait often shows sex-specific variation, but female salmon are seldom included in experimental studies of maturation. As a result, there gap our knowledge how different genetic and environmental factors affect Using 4-year common-garden experiment, we assessed the influence diet (low-fat vs. control) vgll3 (a candidate gene genomic region known age salmon) on maturation related...
ABSTRACT Tolerance against acute warming is an essential trait that can determine how organisms cope during heatwaves, yet the mechanisms underlying it remain elusive. Water salinity has previously been shown to modulate thermal tolerance and may therefore provide clues towards these limiting mechanisms. Here we tested whether short (2 hours) long (10 days) term exposure different water salinities (0-5 ppt) affected in zebrafish (N=269). We found did not affect of at either time point,...
Global warming is predicted to increase both acute and prolonged thermal challenges for aquatic ectotherms. Severe short medium-term stress over hours days may cause mortality, while longer sub-lethal performance declines. The interrelationship between the responses short, medium unresolved. We asked if same individuals are tolerant rapid slow challenges, a question which has so far received little attention. Additionally, we investigated possibility of syndrome where in population...
ABSTRACT Atlantic salmon ( Salmo salar ) is a species with diverse life-history strategies, to which the timing of maturation contributes considerably. Recently, genome region including gene vgll3 has gained attention as locus large effect on timing, and recent studies in have indicated that its might be mediated through body condition accumulation adipose tissue. However, cellular physiological pathways leading from genotype phenotype are still unknown. Standard metabolic rate potentially...