Welcome to the Division of Animal Evolutionary Biology

Biodiversity
Division of Animal Evolutionary Biology is a part of the Department of Zoology, Faculty of Science of the Charles University. Our research is focused on studies of general evolutionary issues including speciation, genetics of adaptation, sensory and reproductive biology, evolution of immunity and sexual selection. We use various animal species including mammals, birds, reptiles and fish as model organisms. Our research combines diverse methodological approaches ranging from population genetics, phylogenetics and comparative genomics through morphometry and comparative anatomy to ecological and ethological studies in the field. Much of our involvement also centres on teaching including practicals and field excursions.

News & Events


Publication: Temporal Stability and the Effect of Transgenerational Transfer on Fecal Microbiota Structure in a Long Distance Migratory Bird
February, 2017
Jakub Kreisinger, Tomáš Albrecht and coworkers from the Department of Zoology (Charles University) and Institute of Vertebrate Biology (Czech Academy of Science) recently published in Frontiers in Microbiology research on temporal stability and transgenerational transfer of gut microbiota. Gut microbiota is often considered an integral part of the host’s phenotype, inducing long-term effect on traits associated with fitness. Consequently, gut microbiota may serve as a substrate for natural selection which assumes, however, its high temporal stability and trans-generational heritability. These two crucial assumptions were tested in wild population of barn swallow. Overall effect sizes for microbiota stability in time were low. Nevertheless, a subset of microbiota exhibiting significant temporal consistency both at the within and among-season timescale and possibly inducing long-term effects on the host phenotype was identified.
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Publication: Trade-off between carotenoid-based sexual ornamentation and sperm resistance to oxidative challenge
January, 2017
Oldřich Tomášek, Tomáš Albrecht and colleagues published a paper in Proceedings of the Royal Society B: Biological Sciences testing the hypothesis that more intense male carotenoid-based sexual ornamentation signals higher sperm resistance to oxidative stress from free radicals. The results of their experiment on zebra finches challenges this hypothesis and even suggests the opposite, i.e. that males investing more in ornamentation have sperm that are less resistant to free radicals. The study also showed that dietary lutein reduces the proportion of abnormal sperm in ejaculate, suggesting that carotenoid deficiency may be one of the causes of impaired male fertility.
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Publication: Bayesian phylogenetic estimation of clade ages supports trans-Atlantic dispersal of cichlid fishes
January, 2017
Zuzana Musilová and Zuzana Starostová are co-authors of the study published in Systematic Biology. The study is based on a large data set including sequence data from over 1000 species of teleost fishes as well as 147 carefully selected fossils to obtain the robust and reliable divergence time estimates of different fish lineages. The results of the study provide also strong evidence for transoceanic dispersal of cichlids and other groups of teleost fishes. Since the rise of molecular clock, such dispersals raised questions in biogeography and ichthyology. The study was selected for the cover page image of the journal issue.
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Dean's Award: Our student, Martin Těšický, obtained a Dean's Award for the outstanding Master thesis. Congratulations!
December, 2016

Team of Pavel Stopka publihed a paper in Scientific Reports: On the saliva proteome of the Eastern European house mouse (Mus musculus musculus) focusing on sexual signalling and immunity.
October, 2016
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Publication: Phenotypic differentiation is associated with divergent sexual selection among closely related barn swallow populations
September, 2016
Data from Czech barn swallows were used in a study published in Journal of Evolutionary Biology focusing on the role of sexual selection in the diversification of phylogenetic clades and trait divergence during speciation. Sexual selection pressures for multiple male visual signals was assessed across four barn swallow (Hirundo rustica) populations (Czech Republic, Romania, Turkey, Israel) of two subspecies (rustica and transitiva). The study demonstrated significant phenotypic differentiation in four sexual signalling axes, despite very low-level genomic divergence and no comparable divergence in an ecological trait. Collectively, the results suggest that sexual selection is the primary driver of phenotypic differentiation in barn swallows and add to growing evidence of phenotypic divergence with gene flow.
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Publication: Characterization of CD46 and β1 integrin dynamics during sperm acrosome reaction
September, 2016
Group of Kateřina Dvořáková-Hortová published a new research in Scientific Reports journal. They studied the acrosome reaction, a process of membrane fusion and lytic enzyme release, which enables sperm to penetrate the egg surroundings. Using super resolution microscopy, they demonstrated a dynamic CD46 protein reorganisation over the sperm head during the acrosome reaction, and its interaction with transmembrane protein integrins, which was confirmed by proximity ligation assay. Furthermore, they propose their joint involvement in actin network rearrangement. Moreover, CD46 and ?1 integrins are expected to be involved in signal transduction pathways directing the acrosome stability and essential protein network rearrangements prior to gamete fusion.
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Publication: Role of transposable elements in gene family expansions in mammals
August, 2016
Václav Janoušek and colleagues of the Institute of Vertebrate Biology (CAS) and University of Arizona published a study in Genome Biology and Evolution journal. Authors reported a relationship between transposable elements accumulation and expansion of gene families in the human and mouse genome. Two large classes of transposable elements (LINEs, LTRs) were found to be associated with gene families, yet their role differ. LINEs are supposed to contribute structurally, driving the gene family expansion. LTRs contribute to the process of sub/neofunctionalisation.
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Publication: Genome-wide differentiation in closely related populations: the roles of selection and geographic isolation
July, 2016
Tomáš Albrecht participated on research (led by Rebecca Safran, University of Colorado, Boulder) focusing on speciation of barn swallows. In paper published in Molecular Ecology they investigated the relative contributions of selection and geographic distance to genome-wide differentiation among allopatric barn swallow populations of four subspecies. Using statistical approaches to control for spatial autocorrelation of phenotypic variables and geographic distance, they found that divergence in traits related to migratory behaviour and sexual signalling, as well as geographic distance, together explained over 70% of genome-wide divergence among populations. By combining these results with prior studies of how selection shapes morphological differentiation and accounting for spatial autocorrelation, they inferred that morphological adaptation played a large role in shaping population-level differentiation in barn swallows.
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Team of Pavel Stopka publihed a paper in Frontiers in Ecology and Evolution: Mouse lipocalins (MUP, OBP, LCN) are co-expressed in tissues involved in chemical communication.
July, 2016
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Course: Analysis of molecular data
June, 2016
Advanced methods in DNA sequence and mulilocus data analyses (MB120P143). Course will take place in the winter term 2016/2017.
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Zuzana Musilová with colleagues published a paper in Journal of Experimental Biology: From crypsis to mimicry: changes in colour and the configuration of the visual system during ontogenetic habitat transitions in a coral reef fish.
June, 2016
The study focuses on how ontogenetic changes in body colouration and of the visual system relate to habitat transitions in a coral-reef fish. Adult dusky dottybacks (Pseudochromis fuscus), are aggressive mimics that change colour to imitate various fishes in their surroundings. Juveniles of these fish are present in the pelagic zone and only later in development they associate with the coral reef. The mimicry coloration and the perception skills change then dramatically at the time of the habitat transition.
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Publication: Patterns of gene flow and selection across multiple species of Acrocephalus warblers: footprints of parallel selection on the Z chromosome.
June, 2016
Radka Reifová and colleagues published a paper in BMC Evolutionary Biology describing evolutionary history of recenty radiated Acrocephalus warblers. The study brings the first evidence that gene flow occurred during Acrocephalus radiation and not only between sister species. The authors also found independent instances of positive selection at the same loci in multiple species indicate an interesting possibility that the same loci might have contributed to reproductive isolation in several speciation events.
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Publication: Signal Traits and Oxidative Stress: A Comparative Study across Populations with Divergent Signals
May, 2016
T. Albrecht and O. Tomášek investigated, jointly with researchers from Cornell University Ithaca and University of Colorado, Boulder, the hypothesis that the relationship between signal trait elaboration and a central component of organismal health—oxidative stress—differs across closely related populations that have diverged in signal use and preferences, using barn swallows as a model system. The traits of interest were melanin based coloration of ventral feathers (sexual signal in north American Hirundo rustica erythrogaster) and tail streamer length (sexual signal in European barn swallows). They found that while some phenotypic traits appear to be capable of conveying similar physiological information regardless of their use as signals, divergence in other phenotypic traits (tail streamer length versus ventral feather colouration) may be associated with shifts in their information content (associated with increased oxidative stress in one population but not in the other one). The paper was published in Frontiers in Ecology and Evolution
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Team of Pavel Němec publihed a paper in PNAS: Birds have primate-like numbers of neurons in the forebrain.
May, 2016
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Pavel Němec and colleagues published a paper in PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES: Absolute, not relative brain size correlates with sociality in ground squirrels
March, 2016
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Michal Vinkler with colleagues publihed a paper in PLoS One: Genetic Diversity of NHE1, Receptor for Subgroup J Avian Leukosis Virus, in Domestic Chicken and Wild Anseriform Species.
March, 2016
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Publication: Opposing effects of oxidative challenge and carotenoids on antioxidant status and condition-dependent sexual signalling
March, 2016
Oldřich Tomášek, Tomáš Albrecht and collegues published a paper in Scientific Reports. Their study provides an experimental support for an adverse effect of free radical exposure on carotenoid-based sexual ornamentation, as well as for, recently questioned, antioxidant function of carotenoids in birds. Together, the results support the hypothesis proposing that oxidative stress links ornament expression to individual body condition, thereby playing an important role in the evolution of carotenoid-based sexual signalling.
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Unix and genomic data: A new advanced course focusing on manipulation and analysis of the large genomic data in the Unix system.
September, 2015
The course is going to be held during weekend January 8-10, 2016
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Publication: Cloacal Microbiome Structure in a Long-Distance Migratory Bird Assessed Using Deep 16sRNA Pyrosequencing
September, 2015
Jakub Kreisinger and colleagues used deep pyrosequencing to describe the cloacal microbiome composition in free-living barn swallows Hirundo rustica, a long-distance migratory passerine bird. The paper published in PLoS One journal reports several bacteria phyla dominate the cloacal microbiome of barn swallows. However, Bacteroidetes, a common group of the digestive tract in many vertebrate species, was relatively rare in barn swallow. In addition, finding of a significant correlation of cloacal microbiome within breeding pair members is consistent with the hypothesis that the cloacal contact during within-pair copulation may promote transfer of bacterial assemblages.
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Veronika Javůrková and colleagues published paper in Journal of Experimental Zoology Part A Ecological Genetics and Physiology: Effects of experimentally increased in ovo lysozyme on egg hatchability, chicks complement activity, and phenotype in a precocial bird
July, 2015
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Publication: Interspecific territoriality in two songbird species: potential role of song convergence in male aggressive interactions
June, 2015
Radka Reifová with colleagues from the Institute of Environmental Studies and Department of Ecology published a paper in Animal Behaviour. The paper reports on pattens of interspecific territoriality in a secondary contact zone between the Common nightingale and the Thrush nigtingale. They suggest that song convergence observed in a secondary contact zone might be an adaptive response to interspecific interference competition.
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Team of Tomáš Albrecht publised paper in Behavioral Ecology and Sociobiology on brood parasitism in European barn swallow.
June, 2015
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Martin Těšický and Michal Vinkler published paper in Journal of Immunology Research on trans-species polymorphism in immune genes.
May, 2015
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Libor Mořkovský and Radka Reifová with colleagues published paper in Molecular Ecology Resources: Scrimer: designing primers from transcriptome data.
March, 2015
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Publication: Methylation analysis of histone H4K12ac-associated promoters in sperm of healthy donors and subfertile patients
March, 2015
The new study by Kateřina Hortová, Barbora Dudková and their colleagues from the University of Giessen and Fertility centers in Germany was published in the Clinical epigenetics. It has been shown that aberrant histone acetylation within developmentally important gene promoters in subfertile men, but not DNA methylation, may reflect insufficient sperm chromatin compaction affecting the transfer of epigenetic marks to the oocyte.
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Seminar (March 17): Jamie C. Winternitz from the Institute of Vertebrate Biology (AS CR): Sexual selection, parasites, and immune gene variation in wild populations.
March, 2015
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Members of our group on BBC: The publication by Alena Syrůčková and Pavel Munclinger on monogamy of European beavers has got attention by the British news channel.
March, 2015
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Seminar (March 3): Robert Karn from the University of Arizona is going to speak this week on characterization of an Abp knockout mouse.
February, 2015
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Radka Reifová and Lucie Kropáčková with colleagues published paper in Journal of Evolutionary Biology: Maternal-fetal genomic conflict and speciation: no evidence for hybrid placental dysplasia in crosses between two house mouse subspecies.
February, 2015
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Publication: Functional organization of the genome may shape the species boundary in the house mouse
February, 2015
The boundary between two house mouse subspecies (Mus musculus musculus/M. m. domesticus) was known to be semi-permeable. The new study by Václav Janoušek, Pavel Munclinger and their colleagues from the University of Michigan published in the Molecular Biology and Evolution journal showed that functional composition of genes, population differentiation and rate of recombination is associated with the genomic permeability (i.e. gene exchange) in the house mouse hybrid zone. Their finding suggests that functional organization of the genome may be an important driver in species divergence and subsequently in the evolution of reproductive isolation.
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Tomáš Albrecht with colleagues published paper in Evolution: Postcopulatory sexual selection is associated with accelerated evolution of sperm morphology.
February, 2015
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Michal Vinkler and Hana Bainová with colleague published paper in Genetics Selection Evolution: Protein evolution of Toll-like receptors 4, 5 and 7 within Galloanserae birds.
December, 2014
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Tomáš Albrecht with colleagues published paper in PLoS ONE: Sperm Morphology in Two House Mouse Subspecies: Do Wild-Derived Strains and Wild Mice Tell the Same Story?
December, 2014
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THE CENTRAL EUROPEAN MEETING ON GENES, GENE EXPRESSION, AND BEHAVIOUR
October, 2014
The meeting is to be held in the Czech Republic in Nové Hrady from October 30 to November 1, 2014. The conference is organized by the Department of Zoology, Faculty of Science, Charles University in Prague and Institute of Vertebrate Biology Academy of Sciences of the Czech Republic (IVB AS CR).
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Jakub Kreisinger with colleagues published paper in Molecular Ecology: Gastrointestinal microbiota of wild and inbred individuals of two house mouse subspecies assessed using high throughput parallel pyrosequencing.
September, 2014
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Pavel Munclinger and Alena Syrůčková published paper in Evolutionary Applications: Nuclear and mitochondrial genetic structure in the Eurasian beaver (Castor fiber) - implications for future reintroductions.
June, 2014
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Kateřina Dvořáková-Hortová and Pavel Stopka with colleagues published paper in PLoS ONE: Toxoplasma gondii decreases the reproductive fitness in mice.
June, 2014
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Achievement: Zuzana Starostová won L'Oréal-UNESCO Award for Women in Science
May, 2014
Zuzana Starostová, a member of our group, won prestigious award of L'Oréal-UNESCO for Women in Science. Congratulation!
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Publication: Effect of intermittent incubation and clutch covering on the probability of bacterial trans-shell infection
April, 2014
Role of bacteria on reproductive success and reproductive behaviour of birds has been widely neglected. Most recent correlative studies revealed relationship between intensity of eggshell bacterial load and egg hatchability. However, if such relationship really exists, mechanisms reducing this deleterious effect must have been evolved. Incubation and clutch covering with nest lining during the egg laying period might have been ones of them.
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Publication: First evidence of independent pseudogenization of Toll-like receptor 5 in passerine birds
April, 2014
Toll-like receptor 5 (TLR5) is an innate immunity receptor crucial in detection of bacterial flagellin in vertebrates. In the recent study Hana Bainová and colleagues (Bainová et al., Developmental & Comparative Immunology) have made an unexpected discovery that in several phylogenetic lineages of passerine birds the loss of a functional TLR5 gene copy occurred. This happened at least 7 times independently. The lack of a functional TLR5 might increase the risk of bacterial infections. This unique phenomenon of TLR5 pseudogenization has not been described before in other animals.
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Pavel Němec with colleagues published paper in Proceedings of the Royal Society: Odours stimulate neuronal activity in the dorsolateral area of the hippocampal formation during path integration.
March, 2014
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Michal Vinkler, Pavel Muncliner, Tomáš Albrecht with colleagues published paper in Behavioral Ecology and Sociobiology: Effects of heterozygosity and MHC diversity on patterns of extra-pair paternity in the socially monogamous scarlet rosefinch.
March, 2014
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Kateřina Dvořáková-Hortová with colleagues published paper in Reproduction: Progress of sperm IZUMO1 relocation during spontaneous acrosome reaction.
December, 2013
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