Anti Vasemägi

Anti Vasemägi
Swedish University of Agricultural Sciences | SLU · Department of Aquatic Resources

Professor

About

148
Publications
27,744
Reads
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3,152
Citations
Introduction
Anti Vasemägi research covers a broad spectrum of topics in evolutionary biology, genomics, population genetics and ecology focusing on understanding the drivers of genetic and phenotypic variation in aquatic organisms.
Additional affiliations
February 2018 - present
Swedish University of Agricultural Sciences
Position
  • Professor (Full)
January 2005 - present
Estonian University of Life Sciences
Position
  • Researcher

Publications

Publications (148)
Article
The Northern pike (Esox lucius) is an important predator in freshwater and brackish water environments. In the Baltic Sea, Northern pike follows isolation by distance pattern across wide geographical scale. However, relatively little is known about the fine-scale population divergence and temporal genetic variation of Baltic pike, especially for po...
Article
Full-text available
Heat waves constitute a challenge for aquatic ectotherms. However, the thermal tolerance of animals and their individual phenotypic plasticity to respond to heat waves may be influenced by thermal history. We tested these hypotheses by comparing the upper thermal tolerance and the individual capacities of three‐spined sticklebacks from populations...
Article
Full-text available
Reliable abundance information is the foundation for managing aquatic resources. Species with low catchability are, however, often overlooked in monitoring programmes. Thus, governing bodies lack the data necessary to make well-informed management decisions. Environmental DNA (eDNA) can produce quantitative estimates of fish abundances, but the pre...
Article
Full-text available
Extreme environments are inhospitable to the majority of species, but some organisms are able to survive in such hostile conditions due to evolutionary adaptations. For example, modern bony fishes have colonized various aquatic environments, including perpetually dark, hypoxic, hypersaline and toxic habitats. Eurasian perch (Perca fluviatilis) is a...
Article
Global climate change is altering the abundance and spread of many aquatic parasites and pathogens. Proliferative kidney disease (PKD) of salmonids caused by the myxozoan Tetracapsuloides bryosalmonae is one such emerging disorder, and its impact is expected to increase with rising water temperature. Yet, the distribution and prevalence of T. bryos...
Preprint
Full-text available
Extreme environments are inhospitable to the majority of species, but some organisms are able to survive in such hostile conditions due to evolutionary adaptations. For example, modern bony fishes have colonized various aquatic environments, including perpetually dark, hypoxic, hypersaline and toxic habitats. Eurasian perch (Perca fluviatilis) is a...
Chapter
Full-text available
The sexual maturation of Atlantic salmon Salmo salar is a multifactorial process in which fish acquire somatic characteristics to reproduce. In salmon farming has been described a high variability in the trait age at maturation derived from wild reproductive strategies. Early maturation is a phenotype that generates serious economic repercussions o...
Article
Intra-species genetic homogenization arising from anthropogenic impacts is a major threat to biodiversity. However, few taxa have sufficient historical material to systematically quantify long-term genetic changes. Using archival DNA collected over approximately 100 years, we assessed spatio-temporal genetic change in Atlantic salmon populations ac...
Article
Full-text available
The myxozoan Tetracapsuloides bryosalmonae is a widely spread endoparasite that causes proliferative kidney disease (PKD) in salmonid fish. We developed an in silico pipeline to separate transcripts of T. bryosalmonae from the kidney tissue of its natural vertebrate host, brown trout (Salmo trutta). After stringent filtering, we constructed a parti...
Article
Full-text available
Global climate change is altering the abundance and spread of various parasites, which has important consequences not only for host–parasite interactions but also for the relationships between different host species. Here, we focus on the myxozoan endoparasite Tetracapsuloides bryosalmonae that causes temperature‐dependent proliferative kidney dise...
Article
Full-text available
Science-based management of marine fisheries and effective ecosystem monitoring both require the analysis of large amounts of often complex and difficult to collect information. Legislation also increasingly requires the attainment of good environmental status, which again demands collection of data to enable efficient monitoring and management of...
Article
Full-text available
Gene transcription variation is known to contribute to disease susceptibility and adaptation, but we currently know very little about how contemporary natural selection shapes transcript abundance. Here, we propose a novel analytical framework to quantify the strength and form of ongoing natural selection at the transcriptome level in a wild verteb...
Article
Full-text available
Cultured Atlantic salmon Salmo salar are of international socioeconomic value, and the process of domestication has resulted in significant behavioural, morphological, and allelic differences from wild populations. Substantial evidence indicates that direct genetic interactions or interbreeding between wild and escaped farmed Atlantic salmon occurs...
Article
Full-text available
The wels catfish (Silurus glanis) is one of the largest freshwater fish species in the world. This top predator plays a key role in ecosystem stability, and represents an iconic trophy-fish for recreational fishermen. S. glanis is also a highly valued species for its high-quality boneless flesh, and has been cultivated for over 100 years in Eastern...
Article
Full-text available
Background: Next generation sequencing (NGS) technologies are extensively used to dissect the molecular mechanisms of host-parasite interactions in human pathogens. However, ecological studies have yet to fully exploit the power of NGS as a rich source for formulating and testing new hypotheses. Methods: We studied Eurasian perch (Perca fluviati...
Preprint
Full-text available
Background Next generation sequencing (NGS) technologies are extensively used to dissect the molecular mechanisms of host-parasite interactions in human pathogens. However, ecological studies have yet to fully exploit the power of NGS as a rich source for formulating and testing new hypotheses. Methods We studied Eurasian perch (Perca fluviatilis)...
Preprint
Full-text available
Background: Next generation sequencing (NGS) technologies are extensively used to dissect the molecular mechanisms of host-parasite interactions in human pathogens. However, ecological studies have yet to fully exploit the power of NGS as a rich source for formulating and testing new hypotheses. Methods: We studied Eurasian perch (Perca fluviatilis...
Article
Full-text available
Despite its peculiar distribution, the biology of the southernmost bat species in the world, the Chilean myotis ( Myotis chiloensis ), has garnered little attention so far. The species has a north-south distribution of c. 2800 km, mostly on the eastern side of the Andes mountain range. Use of extended torpor occurs in the southernmost portion of th...
Preprint
Full-text available
Despite its peculiar distribution, the biology of the southernmost bat species in the world, the Chilean myotis (Myotis chiloensis), has garnered little attention so far. The species has a north-south distribution of c. 2800 km, mostly on the eastern side of the Andes mountain range. Use of extended torpor occurs in the southernmost portion of the...
Preprint
Full-text available
Gene transcription variation is known to contribute to disease susceptibility and adaptation, but we currently know very little about how contemporary natural selection shapes transcript abundance. We estimated selection on transcript abundance in cohort of a wild salmonid fish ( Salmo trutta ) affected by a myxozoan parasite through mark-recapture...
Article
Full-text available
A better understanding of the environmental and genetic contribution to migratory behavior and the evolution of traits linked to migration is crucial for fish conservation and fisheries management. Up to date, a few genes with unequivocal influence on the adoption of alternative migration strategies have been identified in salmonids. Here, we used...
Poster
Full-text available
Climate change will increase the frequency and duration of extreme thermal events as has been seen during summer 2018 in the whole northern hemisphere. These heat waves have led to mass fish death events around the world. Moreover, the presence of a certain pollutant might further compromise the ability of ectotherms to respond to these sudden temp...
Article
Full-text available
The conservation and management of endangered species requires information on their genetic diversity, relatedness and population structure. The main genetic markers applied for these questions are microsatellites and single nucleotide polymorphisms (SNPs), the latter of which remain the more resource demanding approach in most cases. Here, we comp...
Article
Full-text available
The evolution of complex traits is often shaped by adaptive divergence. However, very little is known about the number, effect size, and location of the genomic regions influencing the variation of these traits in natural populations. Based on a dense linkage map of the common frog, Rana temporaria, we have localized, for the first time in amphibia...
Conference Paper
Climate change will increase both the average temperature of environment but also the frequency and duration of extreme thermal events as has been seen during summer 2018 in the whole northern hemisphere. These heat waves have led to mass fish death events around the world. The ability of ectotherms to respond to these sudden temperature changes ca...
Article
Full-text available
Indonesianfreshwaterfishdiversityisthreatenedbyhumanactivitiessuchaslogging,landclearing,pollution and introduction of non-native species. The latter may pose serious threats to endemic freshwater fauna even in relatively pristine and isolated habitats. One such area, West Papua in the island of New Guinea, is one of the least studied regions in th...
Article
Full-text available
The Eurasian perch (Perca fluviatilis) is the most common fish of the Percidae family widely distributed across Eurasia. Perch is a popular target for professional and recreational fisheries and a promising freshwater aquaculture species in Europe. However, despite its high ecological, economical and societal importance, the available genomic resou...
Article
Full-text available
The Eurasian perch (Perca fluviatilis) is the most common fish of the Percidae family widely distributed across Eurasia. Perch is a popular target for professional and recreational fisheries and a promising freshwater aquaculture species in Europe. However, despite its high ecological, economical and societal importance, the available genomic resou...
Article
Full-text available
Even though parasitic infections are often costly or deadly for the host, we know very little which genes influence parasite susceptibility and disease severity. Proliferative kidney disease (PKD) is an emerging and, at elevated water temperatures, potentially deadly disease of salmonid fishes that is caused by the myxozoan parasite Tetracapsuloide...
Article
Full-text available
The whole mitochondrial genome of a small cyprinid freshwater fish Pectenocypris sp. collected from Serkap River, Central Sumatra, Indonesia was sequenced. This mitochondrial genome consisted of 16,589 bp and included 37 genes in the same order as in many other vertebrates including the human. Phylogenetic analysis suggested that this taxon cluster...
Article
Proliferative kidney disease (PKD) is a temperature-dependent disorder of salmonids induced by the myxozoan parasite Tetracapsuloides bryosalmonae. In Europe, T. bryosalmonae has been reported in rainbow trout, Atlantic salmon, brown trout, Arctic char, brook trout and grayling. This study reports for the first time the presence of T. bryosalmonae...
Article
Brown trout Salmo trutta exhibit highly diverse life histories varying from resident, slow-growing and early maturing to migratory, fast-growing and late maturing even within single watersheds. We sampled eleven locations within the transboundary Finnish-Russian River Koutajoki watershed to evaluate genomic differences among main stem and headwater...
Article
Full-text available
Cohabiting microorganisms play diverse and important roles in the biology of multicellular hosts, but their diversity and interactions with abiotic and biotic factors remain largely unsurveyed. Nevertheless, it is becoming increasingly clear that many properties of host phenotypes reflect contributions from the associated microbiome. We focus on a...
Article
Full-text available
Early growth conditions can have profound impacts on individuals' development, growth and physiology, with subsequent long-term consequences for individuals' fitness and life expectancy. Telomere length (TL) has been suggested to indicate both individual fitness and life expectancy in wide range of species, as the telomere attrition rate at early a...
Article
Full-text available
Unfavorable environmental conditions—abiotic stress—constitute one of the key drivers of evolution leading to environmental adaptation. Since the start of industrial revolution, natural populations are also facing a new stress—global warming—that, in turn, leads to alteration of the severity of most of the existing stress factors and emergence of n...
Article
Full-text available
Globally increasing temperature and modifications in precipitation patterns induce major environmental alterations in aquatic ecosystems. Particularly profound changes are predicted for arctic to temperate shallow lakes where modifications in temperature affect the distribution of ice and ice-free periods, thereby altering the timing of peak produc...
Article
Full-text available
Introduced species can cause large impacts on communities and ecosystems. To prevent invasions and the impacts of invasions, a better understanding of species-specific invasion routes, establishment processes, demographic histories and range expansions is needed. Such valuable biological information can be obtained using population genomics approac...
Article
Full-text available
Health after pathogen contact varies among individuals because of differences in pathogen load (which is limited by resistance) and disease severity in response to pathogen load (which is limited by tolerance). To understand pathogen-induced host evolution, it is critical to know not only the relative contributions of nongenetic and genetic variati...
Article
Full-text available
Both effective population size and life history may influence the efficacy of purifying selection, but it remains unclear if the environment affects the accumulation of weakly deleterious nonsynonymous polymorphisms. We hypothesize that the reduced energetic cost of osmoregulation in brackish water habitat may cause relaxation of selective constrai...
Article
The rivers in northernmost Europe support many of the largest wild Atlantic salmon stocks supplying up to 60% of the total annual catch in the world, but very little is known about their relative contributions to coastal fisheries. We generated a comprehensive Atlantic salmon genetic baseline consisting of 185 populations along the Norwegian, Baren...
Article
Full-text available
The myxozoan endoparasite Tetracapsuloides bryosalmonae causes temperature-driven proliferative kidney disease (PKD) in salmonid fishes. Despite the economic and ecological importance of PKD, information about the distribution of the parasite is still scarce. Here, we report for the first time the occurrence of T. bryosalmonae in wild brown trout (...
Article
Full-text available
By combining 7077 SNPs and 61 microsatellites, we present the first linkage map for some of the early diverged lineages of the common frog, Rana temporaria, and the densest linkage map to date for this species. We found high homology with the published linkage maps of the Eastern and Western lineages but with differences in the order of some marker...
Article
Full-text available
Parasites and pathogens can have an important effect on their host's thermal resistance. The impact of parasite infection on host physiological performances has traditionally been studied in controlled laboratory conditions, and much less is known about its actual effects in wild populations. Nonetheless, such knowledge is critical when assessing t...
Article
Telomeres protect eukaryotic chromosomes; variation in telomere length has been linked (primarily in homoeothermic animals) to variation in stress, cellular ageing and disease risk. Moreover, telomeres have been suggested to function as biomarker for quantifying past environmental stress, but studies in wild animals remain rare. Environmental stres...
Article
Full-text available
1.Dissecting the genetic mechanisms of phenotypic traits that influence fitness in diverse environments provides the important first step towards understanding the robustness of the observed genotype-phenotype associations, the role of genotype-by-environment interaction (GEI) shaping fitness trade-offs, and maintaining genetic variation of quantit...
Article
Full-text available
Oxidative stress (OS) may pose important physiological constraints on individuals, affecting trade-offs between growth and reproduction or ageing and survival. Despite such evolutionary and ecological importance, the results from studies on the magnitude of individual variation in OS resistance and the underlying causes of this variation such as ge...
Article
Many fish species that are separated into genetically distinct populations are exploited as mixed stocks and this creates challenges for a sustainable management. European whitefish in the Baltic Sea represents one of such species forming sea- and river-spawning ecotypes, which are further divided into local populations. This study evaluated the ef...
Article
Full-text available
Analysis of the amount and distribution of genetic variation can yield information about the number of introductions and history of an invasive species, which may be relevant for understanding the evolutionary potential and spread of invaders, as well as for creating best management practices for curbing them. We explored the genetic patterns and i...
Article
Many salmonid fish populations are threatened by genetic homogenization, primarily due to introgressive hybridization with hatchery-reared conspecifics. By applying genome-wide analysis using two molecular marker types (1986 SNPs and 17 microsatellites), we assessed the genetic impacts of inadvertent gene flow via straying from hatchery releases on...