A5008187425- Avian ecology and behavior
- Animal Behavior and Reproduction
- Bird parasitology and diseases
- Plant and animal studies
- Wildlife Ecology and Conservation
- Animal Vocal Communication and Behavior
- Fish Ecology and Management Studies
- Vector-borne infectious diseases
- Genetic and phenotypic traits in livestock
- Study of Mite Species
- Sexual Differentiation and Disorders
- Viral Infections and Vectors
- Insect and Arachnid Ecology and Behavior
- Reproductive Physiology in Livestock
- Demographic Trends and Gender Preferences
- Species Distribution and Climate Change
- Parasite Biology and Host Interactions
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Animal Nutrition and Physiology
- Animal Ecology and Behavior Studies
- Bat Biology and Ecology Studies
- Climate variability and models
- Hungarian Social, Economic and Educational Studies
- Innovations in Educational Methods
- Marine animal studies overview
Eötvös Loránd University
2015-2025
National Agricultural Research and Innovation Centre
1992
Invasive species can displace natives, and thus identifying the traits that make aliens successful is crucial for predicting preventing biodiversity loss. Pathogens may play an important role in invasive process, facilitating colonization of their hosts new continents islands. According to Novel Weapon Hypothesis, colonizers out-compete local native by bringing with them novel pathogens which are not adapted. In contrast, Enemy Release Hypothesis suggests flourishing because they have left...
Although avian malarial parasites are globally distributed, the factors that affect geographical distribution and local prevalence of different parasite lineages across host populations or species still poorly understood. Based on intense screening in nine European blue tit populations, we studied whether ranges as well adaptation, specialization phylogenetic relationships can determine observed prevalences within populations. We found differed consistently between indicating transmission...
Yolk androgen deposition is a widely investigated maternal effect in birds, but its adaptive value at present unclear. The offspring fitness correlates of natural yolk levels are virtually unknown, whereas manipulations largely focused on testosterone and neglected other androgens. We determined concentrations the 2 dominant androgens, androstenedione testosterone, from all eggs collared flycatcher clutches followed fate individual these crossfostering experiment. concentration was much...
Abstract Certain inherent characteristics of individuals can determine both physiological and behavioural responses to environmental challenges, which could drive a correlation between levels corticosterone ( CORT ), the most important stress hormone profiles. Therefore, level may mediate consistent behaviours along shy/bold continuum, thus, it serve as pleiotropic basis for syndromes. Moreover, challenges have consequences concentrations, would also result in physiology even without...
Background Climate change potentially has important effects on distribution, abundance, transmission and virulence of parasites in wild populations animals. Methodology/Principal Finding Here we analyzed paired information 89 parasite for 24 species bird hosts some years ago again 2010 with an average interval 10 years. The taxa included protozoa, feather parasites, diptera, ticks, mites fleas. We investigated whether abundance prevalence was related to body condition, reproduction...
Egg size is a particularly important life-history trait mediating maternal influences on offspring phenotype. Females can vary their egg-size investment in relation to environmental circumstances, own breeding condition, and the quality of mate. Here we analyzed inter- intraclutch variation egg Collared Flycatcher (Ficedula albicollis) basis eight years data. According our results, mean increased with female but did not differ among young, middle-aged, old females. The male's age, body size,...
Abstract Theory suggests that male ornaments should be reliable signals of age, with more elaborated reflecting superior quality in terms experience and/or viability. Bird song is immensely involved sexual selection, thus not‐surprisingly, it usually shows age‐dependent variation. Although the collared flycatcher Ficedula albicollis has been intensively studied for its traits, and female preference age expected to strong, there no quantitative information on expression this species. Here, we...
Abstract Assessing additive genetic variance is a crucial step in predicting the evolutionary response of target trait. However, estimated may be sensitive to methodology used, e.g., way relatedness assessed among individuals, especially wild populations where social pedigrees can inaccurate. To investigate this possibility, we investigated tarsus length, major proxy skeletal body size birds. The model species was collared flycatcher ( Ficedula albicollis ), socially monogamous but...
ABSTRACT Extra‐pair paternity (EPP) is a widespread phenomenon, as EPP has been observed in 76% of the socially monogamous bird species. Many hypotheses try to explain evolution infidelity. While females may participate extra‐pair copulations, for instance, ensure fertilisation their eggs or obtain potential genetic benefits offspring, unfaithful face many costs too. As nestling provisioning one of, if not most energetically costly forms parental care, certainty hypothesis predicts that...
Several hypotheses predict a relationship between parasite burden and risk-taking behavior, but the underlying causal mechanisms are poorly understood due to scarcity of experimental studies neglected focus on immune defense. Here, in 3 sets field collared flycatcher, Ficedula albicollis, we investigated how among-male variation flight initiation distance (FID, at which an individual flee potential predator) is linked health status. First, correlatively assessed FID prevalence haemosporidian...
Several hypotheses have been proposed to explain the adaptiveness of hatching asynchrony for parents, but delayed is generally detrimental late hatched young. These offspring often experience competitive disadvantage and development. If has a reason other than producing differences among offspring, it would be advantageous, not only even compensate its effects. In some species, increasing investment into later laid eggs reported discussed as compensation mechanism, effect on nestling growth...
Components of avian egg quality often show remarkable variation between females and yet the causes in this fitness‐related trait remain poorly understood. We investigated size yolk carotenoid investment blue tit Parus caeruleus relation to multiple parental traits. that produce eggs with more colourful yolks when mated ultraviolet (UV) attractive males. Since carotenoids may enhance offspring fitness, but be available limiting amounts, correlation we found suggests adaptive adjustment...
Abstract Temporal changes in environmental conditions may play a major role the year-to-year variation fitness consequences of behaviours. Identifying drivers such is crucial to understand evolutionary trajectories behaviours natural contexts. However, our understanding how influences wild remains limited. Using data collected over 14 breeding seasons from collared flycatcher (Ficedula albicollis) population, we examined effect on relationship between survival and risk-taking behaviour,...
The use of new powerful nested polymerase chain reaction (PCR) techniques to identify and screen for prevalence parasites has a huge potential. It allows the detection identification low-intensity infections, but its high sensitivity technical setup may also induce problems. Here, we report cautionary note regarding misleading amplification avian malaria species (Haemoproteus Plasmodium) during Leucocytozoon spp. detection. We used previously described PCR method molecular In first step...
Abstract Many vocalizing animals produce the discrete elements of their acoustic signals in a specific sequential order, but we know little about biological relevance this ordering. For that, must characterize degree by which individuals differ how they organize sequentially and relate these differences to variation quality fitness. In study, fulfilled tasks male collared flycatchers (Ficedula albicollis). We characterized order syllables with network analysis approach studied consistency...
Abstract Aim The increasing spread of vector‐borne diseases has resulted in severe health concerns for humans, domestic animals and wildlife, with changes land use the introduction invasive species being among main possible causes this increase. We explored several ecological drivers potentially affecting local prevalence richness avian malaria parasite lineages native introduced house sparrows ( Passer domesticus ) populations. Location Global. Time period 2002–2019. Major taxa studied...
Many hypotheses have been proposed to explain why female birds start incubate before clutch completion (IBCC). Some of those suggest that the resulting hatching asynchrony (HA) is adaptive because it increases size hierarchy among offspring and in turn reduces nestling competition energy demands during peak feeding period. Others argue IBCC a good strategy unpredictable environments. When food conditions deteriorate, large quickly results death last hatched nestlings, allowing remaining ones...