Next-generation sequencing and the collection of genome-wide data allow identifying adaptive variation footprints directional selection. Using a large SNP set from 259 RAD-sequenced European eel individuals (glass eels) eight locations between 34 64(o) N, we examined patterns genetic diversity across locations. We tested for local selection by searching increased population differentiation using F(ST) -based outlier tests testing significant associations allele frequencies environmental...

ABSTRACT Understanding interspecific introgressive hybridisation and the biological significance of introgressed variation remains an important goal in population genomics. European ( Anguilla anguilla ) American eel A. rostrata represent a remarkable case hybridisation. Both are panmictic spawn partial sympatry Sargasso Sea, occasionally producing viable, fertile hybrids, primarily found Iceland. We studied from into using whole‐genome sequences 78 individuals, including European, 21...

Abstract Background Once highly abundant, the European eel ( Anguilla anguilla L.; Anguillidae; Teleostei) is considered to be critically endangered and on verge of extinction, as stock has declined by 90-99% since 1980s. Yet, species poorly characterized at molecular level with little sequence information available in public databases. Results The first transcriptome was obtained 454 FLX Titanium sequencing a normalized cDNA library, produced from pool 18 glass eels (juveniles) French...

Genomic and transcriptomic approaches have the potential for unveiling genome-wide response to environmental perturbations. The abundance of catadromous European eel (Anguilla anguilla) stock has been declining since 1980s probably due a combination anthropogenic climatic factors. In this paper, we explore dynamics between individuals from high (river Tiber, Italy) low pollution (lake Bolsena, environments, which were measured 36 PCBs, several organochlorine pesticides brominated flame...

Significance A central goal in invasion genomics is to identify and determine the mechanisms that underlie successful colonization, establishment, subsequent range expansion of invasive populations nonindigenous species. Using a whole-genome approach, we evaluate importance genetic diversity for establishment Our study shows per se not major factor driving invasions, since observed all possible scenarios with showing reduced, similar but also increased, relative native population. coalescent...

Abstract Tropical mountains harbor exceptional concentrations of Earth’s biodiversity. In topographically complex landscapes, montane species typically inhabit multiple mountainous regions, but are absent in intervening lowland environments. Here we report a comparative analysis genome-wide DNA polymorphism data for population pairs from eighteen Indo-Pacific bird the Moluccan islands Buru and Seram across island New Guinea. We test how barrier strength relative elevational distribution...

Tropical islands are renowned as natural laboratories for evolutionary study. Lineage radiations across tropical archipelagos ideal systems investigating how colonization, speciation, and extinction processes shape biodiversity patterns. The expansion of the island thrush Indo-Pacific represents one largest yet most perplexing any songbird species. exhibits a complex mosaic pronounced plumage variation its range is arguably world's polytypic bird. It sedentary species largely restricted to...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 307:209-217 (2006) - doi:10.3354/meps307209 Genetic patchiness among recruits in European eel Anguilla anguilla J. M. Pujolar1,2,*, G. E. Maes1, F. A. Volckaert1 1Laboratory of Aquatic Ecology, Katholieke Universiteit Leuven, Ch. de Bériotstraat 32, 3000 Belgium2Present address: Department and Evolutionary...

Abstract Life history traits of highly vagile marine species, such as adult reproductive success and larval dispersal, are strongly determined by oceanographic climatic forces. Nevertheless, organisms may show restricted dispersal in time space. Patterns isolation distance (IBD) have been repeatedly observed species. If spawning is a function geographical location, temporal spatial isolation, can easily be confounded or misinterpreted. In this study, we aimed at discriminating between...

Abstract Aim To explore the patterns of connectivity between marine protected areas ( MPA s) and neighbouring non‐protected scale at which benefits s are expected using white sea bream as model species. Location Marine area Torre Guaceto TGMPA , Italy) in south Adriatic Sea. Methods A multidisciplinary approach was used combining (1) a genetic survey 12 highly informative microsatellite loci samples collected within several locations up to 100 km from ; (2) larval trajectories Lagrangian...

Reduced representation genome sequencing such as restriction-site-associated DNA (RAD) is finding increased use to identify and genotype large numbers of single-nucleotide polymorphisms (SNPs) in model nonmodel species. We generated a unique resource novel SNP markers for the European eel using RAD approach that was simultaneously identified scored genome-wide scan 30 individuals. Whereas genomic resources are increasingly becoming available this species, including recent release draft...

Habitat fragmentation has accelerated within the last century, but may have been ongoing over longer time scales. We analyzed timing and genetic consequences of in two isolated lake-dwelling brown trout populations. They are from same river system (the Gudenå River, Denmark) downstream anadromous by dams established ca. 600–800 years ago. For reference, we included ten other populations hatchery strains. Based on analysis 44 microsatellite loci investigated if lake naturally genetically...

Successfully enforced marine protected areas (MPAs) have been widely demonstrated to allow, within their boundaries, the recovery of exploited species and beyond spillover juvenile adult fish. Little evidence is available about so-called 'recruitment subsidy', augmented production propagules (i.e. eggs larvae) due increased abundance large-sized spawners hosted effective MPAs. Once emitted, can be locally retained and/or exported elsewhere. Patterns propagule retention export from MPAs...

Abstract Overexploitation of wild populations due to the high economic value caviar has driven sturgeons near extinction. The prices commanded by on world markets have made it a magnet for illegal and fraudulent trade, often involving low‐value farmed being sold as top‐quality caviar. We present new molecular approach identification pure sturgeon species hybrids that are among most commercialized in E urope N orth A merica. Our test is based discovery species‐specific single nucleotide...

Species showing complex life cycles provide excellent opportunities to study the genetic associations between cycle stages, as selective pressures may differ before and after metamorphosis. The European eel presents a with two metamorphoses, first metamorphosis from larvae into glass eels (juvenile stage) second silver (adult stage). We tested hypothesis that different genes gene pathways will be under selection at stages when comparing eels. used sets of markers test for selection: first,...

Heterozygosity‐fitness correlations (HFCs) have been reported in populations of many species. We provide evidence for a positive correlation between genetic variability and growth rate at 12 allozyme loci catadromous marine fish species, the European eel (Anguilla anguilla L.). More heterozygous individuals show significantly higher length weight increase an above average condition index comparison with more homozygous individuals. To lesser extent, six microsatellite similar pattern, but...

A changing global climate can threaten the diversity of species and ecosystems. We explore consequences catastrophic disturbances in determining evolutionary demographic histories secluded marble trout populations Slovenian streams subjected to weather extremes, particular recurrent flash floods debris flows causing massive mortalities. Using microsatellite data, a pattern extreme genetic differentiation was found among (global FST 0.716), which exceeds highest values reported freshwater...

Gamete recognition proteins commonly experience positive Darwinian selection and evolve more rapidly than nonreproductive proteins, but the selective forces responsible for their adaptive diversification remain unclear. We examined patterns of in cognate interacting pair formed by sperm bindin its egg receptor (EBR1) two regions sea urchin jelly suREJ3 gene (exons 22 26) among four species Strongylocentrotus urchins (S. purpuratus, S. droebachiensis, pallidus franciscanus). The signatures...

While the current expansion of conservation genetics enables to address more efficiently management threatened species, alternative methods for genetic relatedness data analysis in polyploid species are necessary. Within this framework, we present a standardized and simple protocol specifically designed that can facilitate diversity, as exemplified by ex situ program tetraploid Adriatic sturgeon Acipenser naccarii. A critically endangered endemic Sea tributaries, its persistence is strictly...

The importance of speciation-with-geneflow scenarios is increasingly appreciated. However, the specific processes and resulting genomic footprints selection are subject to much discussion. We studied genomics speciation between two panmictic, sympatrically spawning sister species; European (Anguilla anguilla) American eel (A. rostrata). Divergence assumed have initiated more than 3 Ma, although low gene flow still occurs, strong postzygotic barriers present. Restriction-site-associated DNA...

A precise inference of past demographic histories including dating events using Bayesian methods can only be achieved with the use appropriate molecular rates and evolutionary models. Using a set 596 mitochondrial cytochrome c oxidase I (COI) sequences two sister species European green crabs genus Carcinus (C. maenas C. aestuarii), our study shows how chronologies change significantly application revised that incorporate biogeographic for calibration priors. clear signal expansion was found...