A5074944551- Fish Ecology and Management Studies
- Marine and fisheries research
- Animal Behavior and Reproduction
- Physiological and biochemical adaptations
- Fish Biology and Ecology Studies
- Aquaculture Nutrition and Growth
- Reproductive biology and impacts on aquatic species
- Aquatic Ecosystems and Phytoplankton Dynamics
- Microplastics and Plastic Pollution
- Aquatic Invertebrate Ecology and Behavior
- Parasite Biology and Host Interactions
- Fish biology, ecology, and behavior
- Plant and animal studies
- Genetic diversity and population structure
- Amphibian and Reptile Biology
- Nanoparticles: synthesis and applications
- Marine Bivalve and Aquaculture Studies
- Isotope Analysis in Ecology
- Marine and coastal ecosystems
- Aquaculture disease management and microbiota
- Oceanographic and Atmospheric Processes
- Pharmaceutical and Antibiotic Environmental Impacts
- Advanced biosensing and bioanalysis techniques
- Wildlife Ecology and Conservation
- Sperm and Testicular Function
University of Eastern Finland
2015-2024
Finland University
2012-2023
University of Helsinki
2008-2009
University of Jyväskylä
2007
Karelia University of Applied Sciences
1996-2005
Globally, lake surface water temperatures have warmed rapidly relative to air temperatures, but changes in deepwater and vertical thermal structure are still largely unknown. We compiled the most comprehensive data set date of long-term (1970-2009) summertime temperature profiles lakes across world examine trends drivers whole-lake structure. found significant increases at an average rate + 0.37 °C decade-1, comparable reported previously for other lakes, similarly consistent increasing...
Crucian carp Carassius carassius show great phenotypic plasticity in individual morphology and physiology, strong variation population density different fish communities. Small with shallow bodies large heads are typical overcrowded monospecific communities small ponds, whereas deep‐bodied, found larger, multispecies lakes. especially vulnerable to predation by piscivorous their greater relative body depth has been proposed be an induced defence against size‐limited predation, hence adaptive...
Summary Studies focusing on the physiological variation between populations and its connection to fitness‐related traits are rare, even though integrating these fields would increase knowledge evolution of traits. Standard metabolic rate (SMR) has been suggested influence an individual’s social status level aggressiveness, as dominant individuals tend have higher SMR than subordinate individuals. The juvenile Brown Trout ( Salmo trutta ) from four was measured, population‐level relationship...
Historically, Finnish rivers supported vital populations of migratory salmonids. Presently, these species are more or less endangered due to extensive damming and hydropower production. In this article, we study the main legal scientific drivers for re-evaluating some existing operations in Finland. We argue that there is a need re-evaluation on basis obligations stemming largely from EU law new knowledge. Theoretically, our setting opens up classical adaptive governance problem how address...
Fish are known for their high phenotypic plasticity in life-history traits relation to environmental variability, and this is particularly pronounced among salmonids the Northern Hemisphere. Resource limitation leads trade-offs between related reproduction, growth, survival of individual fish, which have consequences age size distributions populations, as well dynamics productivity. We studied effect growth fecundity vendace females on reproductive using a series long-term incubation...
Exposure of aquatic organisms to micro- and nano-sized plastic debris in their environment has become an alarming concern. Besides having a number potentially harmful impacts for individual organisms, particles can also influence the phenotype performance offspring. We tested whether sperm pre-fertilization exposure nanoplastic could affect offspring survival, size, swimming European whitefish Coregonus lavaretus. exposed ten males three concentrations (0, 100 10 000 pcs spermatozoa-1) 50 nm...
Abstract – The effect of pike Esox lucius predation on the mortality newly stocked Atlantic salmon Salmo salar smolts was investigated in Pyhäjoki River, Finland. number eaten by assessed estimating size population (mark–recapture experiment) and studying stomach contents pike. Before recapturing pike, approximately 39,700 were upstream 2.5‐km‐long (89‐ha) research area. estimated >40‐cm 1507 (95% CL 1012–4731) individuals (17 29.8 kg·ha −1 ). Pike to eat 29% released during 1 week. diet...
Secondary sexual characters are often expressed in both sexes (mutual ornamentation), but less studied simultaneously. We the adaptive signaling function of male and female ornamentation a mutually ornamented fish, whitefish Coregonus lavaretus. In an experimental design which nongenetic environmental effects were minimized, we found that highly females, males, their parental combinations had offspring with better swimming performance predator-avoidance ability than individuals or...
The sperm pre-fertilization environment has recently been suggested to mediate remarkable transgenerational consequences for offspring phenotype (transgenerational plasticity, TGB), but the adaptive significance of process remained unclear. Here, we studied effects thermal in a cold-adapted salmonid, European whitefish (Coregonus lavaretus). We used full-factorial breeding design where eggs five females were fertilized with milt 10 males that had pre-incubated at two different temperatures...
Little is known about how particle chemical composition and size might influence the toxicity of nanoscale plastic debris (NPD) their co-occurring chemicals. Herein, we investigate 3 × 1010 particles/L polyethylene (PE, 50 nm), polypropylene (PP, polystyrene (PS, 200 600 polyvinyl chloride (PVC, nm) NPD benzo(a)pyrene (BaP) to Daphnia magna Danio rerio. During 21 days exposure PE nm PS nm, number broods produced by D. decreased compared other treatments. Exposure BaP alone did not produce...
The present study on the connection between standard metabolic rate ( R S ) and chronic Diplostomum spp. infection resulted in a decrease , an enlargement spleen liver sizes infected juvenile Arctic charr Salvelinus alpinus compared to control fish. As splenic observed fish was not due condition‐related changes spleen, it could most probably be explained by increased leucocyte synthesis. higher masses S. may have been related disorders energetic function, which had major effects biochemical...
We compared smolt physiology of Atlantic salmon stocks, that migrate from freshwater stream environments to a lake (Lake Saimaa, Finland), the Neva River (Russia) brackish water Baltic Sea, and Teno (Finland/ Norway) full-strength seawater Arctic Ocean. The three fish stocks were reared under common garden conditions, ion homeostasis, tolerance, activities gill kidney Na,K-ATPase [3H]ouabain binding tissues determined at different phases smoltification. Activity number sites reached peak...
The presence of microplastics in aquatic ecosystems has recently received increased attention. Small plastic particles may resemble natural food items larval fish and other organisms, create strong selective pressures on the feeding traits exposed populations. Here, we examined if ingestion 90 μm polystyrene microspheres, zooplankton (Artemia nauplii, mean length = 433 μm), shows adaptive variation European whitefish (Coregonus lavaretus). A full-factorial experimental breeding design...
In the present study, effects of trematode eye fluke Diplostomum spathaceum infection and parasite‐induced cataract on energetic costs feeding hatchery‐bred one‐summer‐old Lake Saimaa Arctic charr Salvelinus alpinus were examined. The (measured as oxygen uptake) acute S. negligible, but in chronic infections mean consumption infected fish was significantly higher than that controls. Feeding capability studied aquarium experiments, uninfected healthy‐eyed reacted to zooplankton more rapidly...
Abstract Sexual ornamentation often consists of multiple components. Different sexual signals may indicate different aspects mate quality or reflect in time scales. On the other hand, same can have a dual function and are used both male–male competition courtship. Many fish species capable rapidly altering their colouration (ephemeral colour changes), but this capability is usually ignored selection studies. Here, we experimentally manipulated social environments to study ephemeral changes...
The two most commonly used methods for estimating the food consumption of fish are based on either evacuation rate or energy budget an individual fish. In this study, both those were to estimate under experimental conditions. Bioenergetics models vendace Coregonus albula , smelt Osmerus eperlanus roach Rutilus rutilus and perch Perca fluviatilis reconstructed data published values. precision bioenergetics estimates was evaluated modelling efficiency (EF) model 0.90, 0.97 0.93 coregonids,...
The 'good genes' hypothesis predicts that males advertise their quality with different sexual ornaments and females are able to recognize the genetic of by evaluating these characteristics. In present study, we investigated parental effects on offspring performance (feeding swimming ability newly-hatched larvae) examined whether male ornamentation indicates success in trials whitefish (Coregonus lavaretus Linnaeus). Offspring first-feeding had a strong paternal effect it was also positively...
Abstract Sexual dimorphism is common across the animal kingdom, but contribution of environmental factors shaping differences between sexes remains controversial. In ectotherms, life‐history traits are known to correlate with latitude, sex‐specific responses not well understood. We analyzed trait variation European perch ( Perca fluviatilis L.), a freshwater fish displaying larger female size, by employing wide latitudinal gradient. expected find sex‐dependent in variables: length at age,...
In theory, selection for effective camouflage (i.e. dull coloration) in fish should be strongest when the conditions visual predation are most favourable, such as structurally simple pelagic habitats. By contrast, more sheltered (e.g. littoral) habitats, may favour intra-specific communication bright (at expense of crypsis). Poor transparency, highly humic waters, constrain colour adaptations. We investigated phenotypic variation body coloration Eurasian perch (Perca fluviatilis L.) littoral...
Climate change and other anthropogenic stressors have led to long-term changes in the thermal structure, including surface temperatures, deepwater vertical gradients, many lakes around world. Though studies highlight warming of water temperatures worldwide, less is known about trends full structure which been changing consistently both direction magnitude. Here, we present a globally-expansive data set summertime in-situ temperature profiles from 153 lakes, with one time series beginning as...
Many ejaculate traits show remarkable variation in relation to male social status. Males disfavoured (subordinate) mating positions often invest heavily on sperm motility but may have less available resources (e.g., secondary sexual ornaments) that improve the probability of gaining matings. Although higher investments can increase relative fertilization success subordinate males, it is unclear whether status-dependent differences could any consequences for offspring fitness. We tested this...
Abstract Through the recent increases in abundance, pikeperch ( Sander lucioperca ) has not only become a valuable target for recreational and commercial fishing, but also most important top predator many lakes. Generally oligotrophic Lake Höytiäinen (283 km 2 sustains one of economically stocks Finland, its annual fisheries yield (up to 5.5 kg/ha) is exceptionally high among Finnish Here, we followed seasonal movements fish using conventional tagging, studied short‐term long‐term diet by...