A5008296954- Fish biology, ecology, and behavior
- Retinal Development and Disorders
- Fish Biology and Ecology Studies
- Ecology and Vegetation Dynamics Studies
- Forest Insect Ecology and Management
- Ichthyology and Marine Biology
- Photoreceptor and optogenetics research
- Aquaculture disease management and microbiota
- Forest Ecology and Biodiversity Studies
- Genetic diversity and population structure
- Genomics and Phylogenetic Studies
- melanin and skin pigmentation
- Identification and Quantification in Food
- Aquatic Ecosystems and Biodiversity
- Fish Ecology and Management Studies
- Neurobiology and Insect Physiology Research
- Environmental DNA in Biodiversity Studies
- Coral and Marine Ecosystems Studies
- Evolution and Paleontology Studies
- Plant and animal studies
- Insect Utilization and Effects
- Plant Taxonomy and Phylogenetics
- Olfactory and Sensory Function Studies
- bioluminescence and chemiluminescence research
- Amphibian and Reptile Biology
Charles University
2014-2024
Tomas Bata University in Zlín
2019-2022
Mendel University in Brno
2022
University of Basel
2014-2019
Czech Academy of Sciences, Institute of Animal Physiology and Genetics
2007-2015
Czech University of Life Sciences Prague
2013-2015
Vertebrate vision is accomplished through light-sensitive photopigments consisting of an opsin protein bound to a chromophore. In dim light, vertebrates generally rely on single rod [rhodopsin 1 (RH1)] for obtaining visual information. By inspecting 101 fish genomes, we found that three deep-sea teleost lineages have independently expanded their
Single-gene and whole-genome duplications are important evolutionary mechanisms that contribute to biological diversification by launching new genetic raw material. For example, the evolution of animal vision is tightly linked expansion opsin gene family encoding light-absorbing visual pigments. In teleost fishes, most species-rich vertebrate group, opsins particularly diverse key successful colonization habitats ranging from bioluminescence-biased but basically dark deep sea clear mountain...
Divergence-time estimation based on molecular phylogenies and the fossil record has provided insights into fundamental questions of evolutionary biology. In Bayesian node dating, are commonly time calibrated through specification calibration densities nodes representing clades with known occurrences. Unfortunately, optimal shape these is usually unknown they therefore often chosen arbitrarily, which directly impacts reliability resulting age estimates. As possible solutions to this problem,...
Ecoevolutionary dynamics of the gut microbiota at macroscale level, that is, in across-species comparisons, are largely driven by ecological variables and host genotype. The repeated explosive radiations African cichlid fishes distinct lakes, following a dietary diversification context reduced genetic diversity, provide natural setup to explore convergence, divergence repeatability patterns as function diet, phylogeny environment. Here we characterized 16S rRNA amplicon sequencing 29 species...
Visual opsin genes expressed in the rod and cone photoreceptor cells of retina are core components visual sensory system vertebrates. Here, we provide an overview dynamic evolution most species-rich group vertebrates, teleost fishes. The examination rich genomic resources now available for this reveals that fish genomes contain more copies than present amphibians, reptiles, birds, mammals. expansion fishes is due primarily to a combination ancestral lineage-specific gene duplications....
Animals often change their habitat throughout ontogeny; yet, the triggers for transitions and how these correlate with developmental changes – e.g. physiological, morphological, behavioural remain largely unknown. Here, we investigated ontogenetic in body colouration of visual system relate to a coral-reef fish. Adult dusky dottybacks, Pseudochromis fuscus, are aggressive mimics that colour imitate various fishes surroundings; however, little is known about early life stages this Using...
Distinguishing between hybrid introgression and incomplete lineage sorting causing incongruence among gene trees in that they exhibit topological differences requires application of statistical approaches are based on biologically relevant models. Such study is especially challenging systems, where usual vectors mediating interspecific transfers - hybrids with Mendelian heredity absent or unknown. Here we a complex hybridizing species, which known to produce clonal hybrids, discover how one...
Annual Nothobranchius fishes are distributed in East and Southern Africa inhabit ephemeral pools filled during the monsoon season. show extreme life-history adaptations: embryos survive by entering diapause they vertebrates with fastest maturation shortest lifespan. The distribution of overlaps Rift System. geological paleoclimatic history this region is known detail: particular, aridification expansion grassland habitats started 8 Mya three humid periods between 3 1 superimposed on...
Abstract Background The invasive benthic round goby ( Neogobius melanostomus) is the most successful temperate fish and has spread in aquatic ecosystems on both sides of Atlantic. Invasive species constitute powerful situ experimental systems to study fast adaptation directional selection short ecological timescales present promising case studies understand factors involved impressive ability some colonize novel environments. We seize unique opportunity presented by invasion genomic...
Smell abilities differ greatly among vertebrate species due to distinct sensory needs, with exceptional variability reported in the number of olfactory genes and size odour-processing regions brain. However, key environmental factors shaping genomic phenotypic changes linked system remain difficult identify at macroevolutionary scales. Here, we investigate association between diverse ecological traits chemoreceptors approximately two hundred ray-finned fishes.We found independent expansions...
Cichlids are a prime model system in evolutionary research and several of the most prominent examples adaptive radiations found East African Lakes Tanganyika, Malawi Victoria, all part cichlid radiation (EAR). In past, great effort has been invested reconstructing biogeographic history cichlids (Teleostei: Cichlidae). this study, we present new divergence age estimates for major lineages with main focus on EAR based dataset encompassing representative taxa almost recognized tribes ten...
Understanding the genetic basis of novel traits is a central topic in evolutionary biology. Two pigmentation phenotypes, egg-spots and blotches, emerged during rapid diversification East African cichlid fishes. Egg-spots are circular markings on anal fins hundreds derived haplochromine cichlids species, whereas blotches patches conspicuous fin with ill-defined boundaries that occur few species belong to basal lineages. Both play an important role breeding behavior this group Knowledge about...
Abstract In deep‐water animals, the visual sensory system is often challenged by dim‐light environment. Here, we focus on molecular mechanisms involved in rapid adaptations. We examined evolution a small‐scale yet phenotypically and ecologically diverse adaptive radiation, species flock of cichlid fishes deep crater lake Barombi Mbo Cameroon, West Africa. show that adaptations to novel habitat primarily occurred at level gene expression changes rather than through nucleotide mutations, which...
The visual sensory system is essential for animals to perceive their environment and thus under strong selection. In aquatic environments, light intensity spectrum differ primarily along a depth gradient. Rhodopsin (RH1) the only opsin responsible dim-light vision in vertebrates has been shown evolve response respective conditions, including water gradient fishes. this study, we examined diversity sequence evolution of RH1 virtually entire adaptive radiation cichlid fishes Lake Tanganyika,...
Cichlid visual systems can evolve rapidly during adaptive radiations. This study investigates the Bermin crater lake species flock in Cameroon, comprising thirteen (nine valid and four undescribed) Coptodon species, to explore effects of deep-water light environments on evolution. We analyzed opsin genes their expression using 109 retina transcriptomes, focusing differences among at varying depths, seasonal changes system a seasonally migrating species. All exhibit multichromatic with least...
Phylogenetic relationships among cichlasomatine cichlids were studied using an extensive taxon sampling and both morphological molecular data sets. A new genus, Andinoacara n. gen. with six species (A. pulcher-rivulatus group of previous authors) from trans-andean South America NW cis-andean America, is described based on results phylogenetic diagnosability analyses tests alternative topologies Our demonstrate that cichlid diversity divided into five principal lineages composed eleven genera...
African cichlids (subfamily: Pseudocrenilabrinae) are among the most diverse vertebrates, and their propensity for repeated rapid radiation has made them a celebrated model system in evolutionary research. Nonetheless, despite numerous studies, phylogenetic uncertainty persists, riverine lineages remain comparatively underrepresented higher-level studies. Heterogeneous gene histories resulting from incomplete lineage sorting (ILS) hybridization likely sources of uncertainty, especially...
We reconstruct the historical biogeography of cichlid fishes endemic to trans-Andean region NW South America. DNA sequences were used study genera Andinoacara (Cichlasomatini) and Mesoheros (Heroini). Two eventbased methodological approaches, parsimony-based Statistical Dispersal-Vicariance Analysis (S-DIVA) likelihood-based Dispersal-Extinction Cladogenesis (DEC in Lagrange) for ancestral-area reconstructions. Molecular clock analysis whole group Neotropical Cichlidae (using mtDNA nucDNA...
Vertebrates use cone cells in the retina for color vision and rod to see dim light. Many deep-sea fishes have adapted their environment only retina, while both genes are still preserved genomes. As fish larvae start lives shallow, later submerge depth, they cope with diverse environmental conditions during ontogeny. Using a comparative transcriptomic approach 20 species from eight teleost orders, we report on developmental cone-to-rod switch. While adults mostly rely opsin (RH1) light,...