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Laszlo Zsolt Garamszegi

Laszlo Zsolt Garamszegi
Centre for Ecological Research · Institute of Ecology and Botany

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202
Publications
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Publications

Publications (202)
Article
Many vocalisations of songbirds are sexually selected and socially learnt behavioural traits that are subject to cultural evolution. For cultural inheritance, it is required that individuals imitate the song elements and build them into their repertoire, but little is known about how such learning mechanisms take place in natural populations of bir...
Article
Full-text available
Individual animals can react to the changes in their environment by exhibiting behaviors in an individual‐specific way leading to individual differences in phenotypic plasticity. However, the effect of multiple environmental factors on multiple traits is rarely tested. Such a complex approach is necessary to assess the generality of plasticity and...
Article
Full-text available
Behavior is central to interactions with the environment and thus has significant consequences for individual fitness. Sexual selection and demographic processes have been shown to independently shape behavioral evolution. However, while some studies have tested the simultaneous effects of these forces, no studies have investigated their interplay...
Article
Behavioural variation in courtship has become a central theme in the study of sexual selection. Courtship behaviour can vary consistently between males (between-individual variation) due to inherent characteristics of individuals, but males may also plastically adjust their courtship (within-individual variation) in response to the characteristics...
Article
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Mating system theory predicts that social polygyny—when one male forms pair bonds with two females—may evolve by female choice in species with biparental care. Females will accept a polygynous male if the benefit of mating with a male providing high quality genes or rearing resources outweighs the cost of sharing mate assistance in parental care. B...
Article
To understand the evolutionary ecology of disease dynamics, it is crucial to identify the environmental factors that mediate the spread and abundance of parasites and their vectors. However, human-mediated changes in the biotic and abiotic environment and intervention programs are intensifying in the past 30-40 years at a rate that masks the causal...
Article
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Urban animals often show bolder behaviour towards humans than their nonurban conspecifics. However, it is unclear to what extent this difference is due to consistent individual characteristics or to plasticity such as habituation. To address this question, we investigated parental risk-taking behaviour in 371 female great tits in urban and forest p...
Article
Összefoglaló. Az eddigi összes világjárványt olyan zoonotikus kórokozók, vírusok vagy baktériumok okozták, amelyek könnyen tudnak emberről emberre is terjedni. Minden egyes felbukkanó fertőzés egészségügyi, társadalmi és gazdasági költségeket von maga után. Az országhatárok nem tudják hatékonyan korlátozni a betegségek terjedését. Az eddigi trendek...
Article
Full-text available
Animal signals should consistently differ among individuals to convey distinguishable information about the signalers. However, behavioral display signals, such as bird song are also loaded with considerable within-individual variance with mostly unknown function. We hypothesized that the immediate social environment may play a role in mediating su...
Article
Full-text available
The trade-off between current and future reproduction is a cornerstone of life history theory, but the role of within-individual plasticity on life history decisions and its connections with overall fitness and behaviour remains largely unknown. By manipulating available resources for oviposition at the beginning of the reproductive period, we expe...
Article
Prey animals may react differently to predators, which can thus raise plasticity in risk-taking behaviour. We assessed the behavioural responses of nestling-feeding collared flycatcher (Ficedula albicollis) parents towards different avian predator species (Eurasian sparrowhawk, long-eared owl) and a non-threatening songbird (song thrush) by measuri...
Article
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The study of the diversity of animal signals on within‐ and among‐species levels is the key to uncover mechanisms that shape the evolution of communication systems. However, the methods used to quantify acoustic diversity (like repertoire size) lack to grasp several aspects of acoustic diversity. Here, we propose a new framework for the study of an...
Article
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Many vocalizing animals produce the discrete elements of their acoustic signals in a specific sequential order, but we know little about the biological relevance of this ordering. For that, we must characterize the degree by which individuals differ in how they organize their signals sequentially and relate these differences to variation in quality...
Article
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Human-directed play behaviour is a distinct behavioural feature of domestic dogs. But the role that artificial selection for contemporary dog breeds has played for human-directed play behaviour remains elusive. Here, we investigate how human-directed play behaviour has evolved in relation to the selection for different functions, considering proces...
Article
Animal ecologists often collect hierarchically‐structured data and analyze these with linear mixed‐effects models. Specific complications arise when the effect sizes of covariates vary on multiple levels (e.g., within vs among subjects). Mean‐centering of covariates within subjects offers a useful approach in such situations, but is not without pro...
Article
Full-text available
Linear mixed‐effects models are powerful tools for analyzing complex datasets with repeated or clustered observations, a common data structure in ecology and evolution. Mixed‐effects models involve complex fitting procedures and make several assumptions, in particular about the distribution of residual and random effects. Violations to these assump...
Article
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Introduction On 30 January 2020, the World Health Organization (WHO) declared a Global Health Emergency of international concern attendant to the emergence and spread of SARS-CoV-2, nearly two months after the first reported emergence of human cases in Wuhan, China. In the subsequent two months, global, national and local health personnel and infra...
Article
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Behaviour shown in a novel environment has important consequences for fitness in many animals. It is widely studied with standard tests by placing the individuals into an unfamiliar experimental area, that is the so‐called open‐field or novel environment test. The biological relevance of traits measured under such artificial conditions is questiona...
Article
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The bioacoustic analyses of animal sounds result in an enormous amount of digitized acoustic data, and we need effective automatic processing to extract the information content of the recordings. Our research focuses on the song of Collared Flycatcher (Ficedula albicollis) and we are interested in the evolution of acoustic signals. During the last...
Article
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Among‐population variance of phenotypic traits is of high relevance for understanding evolutionary mechanisms that operate in relatively short timescales, but various sources of non‐independence, such as common ancestry and gene flow can hamper the interpretations. In this comparative analysis of 138 dog breeds, we demonstrate how such confounders...
Article
Variation in climatic conditions is an important driving force of ecological processes. Populations are under selection to respond to climatic changes with respect to phenology of the annual cycle (e.g. breeding, migration) and life‐history. As teleconnections can reflect climate on a global scale, the responses of terrestrial animals are often inv...
Article
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Condition-dependence is considered as a dominant mechanism ensuring the fitness benefits of continued mate choice for heritable sexual signal traits, but crucial questions remain concerning the underlying physiological pathways. For example, it is unclear whether condition-dependence is mediated by the different amount of resource obtained, some un...
Article
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Individuals of many animal species show consistent differences in ecologically relevant behaviours, and these individual-specific behaviours can correlate with each other. In passerines, aggression during nest-site defence is one of those behaviours that have been steadily found to be repeatable within individuals. Furthermore, in several cases, ag...
Article
The early environment in which an organism grows can have long-lasting impacts on both its phenotype and fitness. However, assessing this environment comprehensively is a formidable task. The relative length of the second to the fourth digit (2D : 4D) is a broadly studied skeletal trait that is fixed for life during ontogeny. 2D : 4D has been shown...
Article
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Aggressive behaviour plays a fundamental role in the distribution of limiting resources. Thereby, it is expected to have consequences for fitness. Here, we explored the relationship between aggression and fitness in a long-term database collected in a wild population of the collared flycatcher (Ficedula albicollis). We quantified the aggression of...
Article
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Parasites are a selective force that shape host community structure and dynamics, but host communities can also influence parasitism. Understanding the dual nature from host-parasite interactions can be facilitated by quantifying the variation in parasite prevalence among host species and then comparing that variation to other ecological factors th...
Data
Database used for all the statistical analyses. Plots were also based on this database. (ZIP)
Data
Pairwise distance matrix within new parasite lineages detected in the present study (in bold) and close related parasite lineages according to parasite phylogenetic tree (S1 Fig). (DOCX)
Data
Phylogenetic associations between Plasmodium and Haemoproteus parasites and their avian hosts. (TIFF)
Conference Paper
The rove beetle genus Stenus has experienced a tremendous radiation, comprising > 3000 species widely distributed throughout the world. Its evolutionary success can be partly attributed to specific morphological features, two of which will be in the focus of this contribution: (1) the labium, or lower lip, is modified into a prey-capture apparatus...
Article
Full-text available
Most studies on animal personality evaluate individual mean behaviour to describe individual behavioural strategy, while often neglecting behavioural variability on the within-individual level. However, within-individual behavioural plasticity (variation induced by environment) and within-individual residual variation (regulatory behavioural precis...
Conference Paper
Full-text available
According to our best model, polygynously-mated females had lower survival probability (p= 0.51) than monogamous ones (p= 0.59). In the case of males, we did not found survival costs in relation to their mating status (p Monogamous= Polygynous= 0.54).
Preprint
Full-text available
Parasites are a selective force that shape host community structure and dynamics, but host communities can also influence parasitism. Understanding the dual nature from host-parasite interactions can be facilitated by quantifying the variation in parasite prevalence (i.e. the proportion of infected host individuals in a population) among host speci...
Article
Qualitative and quantitative assessments of bird song repertoires are important in studies related to song learning, sexual selection and cultural evolution. Despite methods for automatic analysis, it is still necessary to engage in manual cutting, segmenting and clustering of bird song elements in many cases. Here, we describe a program, the Ficed...
Article
At macroevolutionary scales, stress physiology may have consequences for species diversification and subspecies richness. Populations that exploit new resources or undergo range expansion should cope with new environmental challenges, which could favour higher mean stress responses. Within-species variation in the stress response may also play a ro...
Article
Full-text available
Theory predicts that parents adjust the sex ratio of their brood to the sexually selected traits of their mate because the reproductive success of sons may be more dependent on inherited paternal attractiveness than that of daughters. Empirical studies vary in terms of whether they support the theory, and this variation has often been regarded as e...
Article
1.Behavioural consistency within and across behaviours (animal personality and behavioural syndrome, respectively) have been vigorously studied in the last decade, leading to the emergence of ‘animal personality’ research. It has been proposed recently that not only mean behaviour (behavioural type), but the environmentally induced behavioural chan...
Article
Several hypotheses predict that the major histocompatibility complex (MHC) drives mating preference in females. Olfactory, color or morphological traits are often found as reliable signals of the MHC profile, but the role of avian song mediating MHC‐based female choice remains largely unexplored. We investigated the relationship between several MHC...
Article
Sexually selected colour traits of bird plumage are widely studied. Although the plumage is replaced only at one or two yearly moults, plumage colour has long been shown to change between moults. Nevertheless, most studies measure colour weeks to months after the courtship period, typically at nestling rearing, and it is unclear whether these measu...
Article
Color patterns, such as bars or dots that cover the body surface of animals are generally thought to play roles in signaling and camouflage. In birds, however, the macroscopic aspects of plumage coloration are less well understood, as past studies typically described plumage colorations by using spectrophotometric analyses. To provide insight into...
Article
Full-text available
Despite growing appreciation of the importance of considering a pace-of-life syndrome (POLS) perspective to understand how animals interact with their environment, studies relating behavior to life history under altered environmental conditions are still rare. By means of a comparative analysis of flight initiation distances (i.e., the distance at...
Article
Full-text available
The hypothesis of pace-of-life syndromes (POLS) predicts relationships between traits including life history traits and risk-taking behaviour that can be mediated by the trade-off between current and future reproductive value. However, alternative causal mechanisms may also generate covariance among these traits without trade-offs. We investigated...
Article
Full-text available
The comparison of acoustic complexity across individuals is often essential for understanding the evolution of acoustic signals. In many animal taxa, as a proxy of acoustic complexity, repertoire size is intensively studied; however, its estimation is challenging in species with large repertoires, as this process is time-consuming and may involve c...
Article
Full-text available
Environmental change associated with urbanization is considered one of the major threats to biodiversity. Some species nevertheless seem to thrive in the urban areas, probably associated with selection for phenotypes that match urban habitats. Previous research defined different “copying styles” in distress behavior during the handling of birds. Th...
Article
Full-text available
Understanding the background mechanisms affecting the emergence and maintenance of consistent between-individual variation within population in single (animal personality) or across multiple (behavioural syndrome) behaviours has key importance. State-dependence theory suggests that behaviour is ‘anchored’ to individual state (e.g. body condition, g...
Data
Results of LMMs on activity and risk taking. F statistics (numerator and denominator df in parentheses) and P values are shown. Significant effects are in bold font. SVL = snout to vent length; basking = basking time treatment; food = food treatment. (DOCX)
Data
Results of GLMs on predictability of activity and risk taking in the pooled sample and in the different treatment groups. First, we ran separate GLMs on the pooled sample with all possible interactions for activity predictability and risk-taking predictability. Second, based on the highest order significant interaction for the given behaviour, we r...
Data
Change in body weight of adult male European green lizards (Lacerta viridis) between the low- and high food treatment groups. Body weight change is represented by group specific means of individual slopes. 95% confidence intervals are shown. (TIF)
Data
Snout to vent length (SVL) and body weight of the assessed adult male European green lizards (Lacerta viridis). (XLSX)
Data
Activity and risk-taking of the assessed adult male European green lizards (Lacerta viridis). Raw data are shown. (XLSX)
Article
Full-text available
Null-hypothesis testing (NHT) based on statistical significance is the most conventional statistical framework, on which neuroscientists rely for the analysis of their data. However, this approach can provide misleading results if p-values are wrongly interpreted, as often done in practice. Misconceptions can arise, in particular, when i) wrong nul...
Article
Full-text available
To provide reliable information about individual-specific characteristics, sexual signals should be consistently displayed within an individual at least within a particular social context or time window. However, some male traits, like bird song, depict extreme within-individual variations even within a very short time frame. To investigate the ext...
Article
Members of the genus Stenus (Coleoptera, Staphylinidae) possess a unique adhesive labial prey-capture apparatus as an adaptation to their predatory behaviour. In order to examine the relationships between the morphology of the prey-capture apparatus, its adhesive performance and the prey-capture success, we combined force measurements, morphologica...
Article
Phenotypes vary at multiple hierarchical levels, of which the interspecific variance is the primary focus of phylogenetic comparative studies. However, the evolutionary role of particular within-species variance components (between-population, between-or within-individual variances) remains neglected. Here, we partition the variance in an anti-pred...
Article
Full-text available
Risk-taking decisions in front of a predator are crucial for the fitness of the animals. Risk-taking behaviour can be hypothesised to depend on escape ability, which is difficult to study in the wild. In this field study, we investigated whether escape ability (i) is a consistent individual-specific characteristic and (ii) can explain between-indiv...
Article
Full-text available
It has been proposed recently that labile state variables (e.g. energy reserves) can have a key role in the development and maintenance of consistent between-individual behavioural variation (i.e. animal personality) within population. In male Carpetan rock lizards (Iberolacerta cyreni), the provitamin D3 component of femoral gland secretion acts a...
Article
Full-text available
In ecological studies of haemosporidian parasites, prevalence is typically considered as a stable attribute. However, little is known about the possible within-host dynamics of these parasites that may originate from environmental fluctuations, parasite life cycles and the ability of hosts to suppress or clear infection. We sampled the blood of mal...
Article
Full-text available
Genes of the major histocompatibility complex (MHC) in vertebrates are integral for effective adaptive immune response and are associated with sexual selection. Evidence from a range of vertebrates supports MHC-based preference for diverse and dissimilar mating partners, but evidence from human mate choice studies has been disparate and controversi...
Article
Full-text available
Phenotypic variation exists in and at all levels of biological organization: variation exists among species, within-populations among-individuals, and in the case of labile traits, within-individuals. Mixed-effects models represent ideal tools to quantify multi-level measurements of traits and are being increasingly used in evolutionary ecology. 2....
Article
Full-text available
The reasons for variation in group size among animal species remain poorly understood. Using “Ashmole's halo” hypothesis of food depletion around colonies, we predict that foraging range imposes a ceiling on the maximum colony size of seabird species. We tested this with a phylogenetic comparative study of 43 species of seabirds (28,262 colonies),...