A5069023376- Parasite Biology and Host Interactions
- Aquatic Invertebrate Ecology and Behavior
- Fish Ecology and Management Studies
- Animal Behavior and Reproduction
- Helminth infection and control
- Aquaculture disease management and microbiota
- Evolution and Genetic Dynamics
- Reproductive biology and impacts on aquatic species
- Mollusks and Parasites Studies
- Genetic diversity and population structure
- Environmental Toxicology and Ecotoxicology
- Myxozoan Parasites in Aquatic Species
- Parasites and Host Interactions
- Environmental DNA in Biodiversity Studies
- Identification and Quantification in Food
- Amphibian and Reptile Biology
- Marine Bivalve and Aquaculture Studies
- Plant and animal studies
- Animal Ecology and Behavior Studies
- Primate Behavior and Ecology
- Physiological and biochemical adaptations
- Study of Mite Species
- Fish Biology and Ecology Studies
- Freshwater macroinvertebrate diversity and ecology
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
University of Jyväskylä
2015-2024
Universidade de Vigo
2019
Vancouver Island University
2016
University of Eastern Finland
2003-2010
Joensuu Science Park
2007
Karelia University of Applied Sciences
2005-2006
ETH Zurich
1998
Freshwater mussels of the Order Unionida provide important ecosystem functions and services, yet many their populations are in decline. We comprehensively review status 16 currently recognized species Europe, collating for first time life-history traits, distribution, conservation status, habitat preferences, main threats order to suggest future management actions. In northern, central, eastern a relatively homogeneous composition is found most basins. southern despite lower richness,...
Calopteryx splendens males exhibit a remarkable variation in wing pigmentation both within and between populations. In this study, we examined whether the wingspots of male C. are related to quality. We measured nylon implant encapsulation rate for 85 found that with larger had faster rate, indicating better immunocompetence. also was positively correlated density haemocytes haemolymph. Another measurement quality, fluctuating asymmetry wingspots, negatively size wingspots. Males...
The global decline of freshwater mussels and their crucial ecological services highlight the need to understand phylogeny, phylogeography patterns genetic diversity guide conservation efforts. Such knowledge is urgently needed for Unio crassus, a highly imperilled species originally widespread throughout Europe southwest Asia. Recent studies have resurrected several from synonymy based on mitochondrial data, revealing U. crassus be complex cryptic species. To address long-standing taxonomic...
Most environments periodically impose severe stress that may cause high mortality and alter population structure, for example, by removing sick old individuals. We examined how anoxic conditions starvation of the host affect virulence two closely related trematode parasites, Rhipidocotyle campanula R. fennica . These parasites differ prevalence infection exploitation rate individual hosts (freshwater clam, Anodonta piscinalis ). Infection is rare (<5% infection) destroys on average 90%...
Seasonal changes in immunocompetence are predicted by the hypothesized trade-off between reproduction and self-maintenance, whereby immune function is a measure of self-maintenance reproductive effort seasonally dependent. We examined seasonal patterns immunological, haematological body condition parameters for male female freshwater fish. In two different populations, relative size spleen chemotaxic migration activity head kidney granulocytes decreased immediately before after spawning,...
Success of trophically transmitted parasites depends to a great extent on their ability manipulate intermediate hosts in way that makes them easier prey for target hosts. Parasite-induced behavioural changes are the most spectacular and diverse examples manipulation. Most studies have been focused individual behaviour including fish. We suggest agonistic interactions territoriality fish may affect vulnerability predators thus transmission efficiency parasites. The parasite Diplostomum...
Fish are common intermediate hosts of trematode cercariae and their gills can potentially serve as important sites penetration by these larval stages. We experimentally tested the hypothesis that volume ventilation flow across contributes to acquisition parasites fish. manipulated intensity using different oxygen concentrations. Juvenile Oncorhynchus mykiss were individually exposed for 10 minutes a standard dose Diplostomum pseudospathaceum at three levels concentration, 30, 60 90%....
If host survival is important to a parasite, it should avoid the use of host's maintenance energy. Selective energy possible by selecting which part penetrate and when be active. We study effects castrating trematode parasite Rhipidocotyle fennica on energetics fresh-water clam Anodonta piscinalis. Before production offspring, uninfected clams allocate shell growth glycogen storage. During offspring slows down, lose weight consume stored glycogen. Concurrently fat content increases...
A Rhipidocotyle fennica infection in Anodonta piscinalis was studied during 1987–1989 Lake Saravesi, central Finland. The overall prevalence 32.3% (n = 1157). Only mature clams, ≥ 3 and 4 years old the littoral sublittoral zones, respectively, were infected. According to log-linear models constructed for there a statistically significant interaction between age of host, habitat, host habitat; prevalences higher among specimens zone than young clams or zone. Logit showed that increased...
The major histocompatibility complex (MHC) contains the most variable genes in vertebrates, but despite extensive research, mechanisms maintaining this polymorphism are still unresolved. One hypothesis is that MHC a result of balancing selection operating by overdominance, convincing evidence for overdominant natural populations has been lacking. We present strong consistent with MHC-specific overdominance free-living population Arctic charr ( Salvelinus alpinus ) northernmost Europe. In...
Abstract An increasing threat to local, native freshwater mussels (Unionida)—an ecologically important but globally alarmingly declining group—is the invasion by exotic bivalves. The Enemy Release Hypothesis predicts that introduced species should benefit from enemy-mediated competition because they are less likely be harmed natural enemies, such as parasites, than their competitors. We investigated within-site differences in parasitism between sympatric (tot. five spp.) and invasive three...
ABSTRACT Freshwater mussels have a substantial role in aquatic ecosystem function and provide valuable services, including water filtration, nutrient cycling, habitat creation sediment stabilization. While they face population declines globally that can negatively affect an ecosystem's health, such as reducing the quality increasing turbidity, lack of information about basic reproductive biology for most species makes their conservation much more difficult. Here, we monitored Unio tumidus...
Abstract We studied the relationship between breeding tubercle ornamentation (i.e. skin roughness) and male pre‐spawning dominance courtship behaviour in roach ( Rutilus rutilus ) within an experimental laboratory system. Sexually mature fish were caught during their migration to spawning pond behaviours artificial arena. Males behaved naturally both terms of male–male interactions attempts achieve spawnings. having many, large tubercles rough skin) significantly more often dominant our...
Parasite distribution is often highly heterogeneous, and intensity of infection depends, among other things, on how well hosts can avoid areas with a high concentration parasites. We studied the role fish behaviour in avoiding microhabitats risk using Oncorhynchus mykiss cercariae Diplostomum pseudospathaceum as model. Spatial parasites experimental tanks was heterogeneous. hypothesized that groups are better at recognizing parasitized area it than solitary fish. Number fish, either or 5,...
Abstract Host–parasite interactions may play a significant role in biological invasions: for example, an invader benefit from lower infectivity by native parasites competition against the hosts (‘enemy release hypothesis’). The invasive North American brook trout ( Salvelinus fontinalis ) is replacing salmonid of freshwater pearl mussel (FPM, Margaritifera margaritifera northern Europe, but suitability as host FPM poorly known. In this study its was investigated using array laboratory and...
Abstract European populations of the freshwater pearl mussel ( FPM , Margaritifera margaritifera ) have collapsed across much species’ geographic range and, despite many types conservation intervention, number successful restoration efforts has been low. The goal this study was to determine whether there were population‐specific differences in suitability Atlantic salmon Salmo salar and brown trout S. trutta as hosts for parasitic glochidium larvae . We predicted that such would depend on...