Hila Levy

Integrative evidence reveals adaptive divergence and speciation in gentoo penguins

Daly Noll, Jane L. Younger, Luis R. Pertierra, Michelle Greve et autres

Understanding lineage divergence is crucial for uncovering cryptic biodiversity. Adaptive divergence, geographic isolation and life-history traits drive speciation in heterogeneous environments. The gentoo penguin complex (Pygoscelis spp.), historically treated as a single species, provides an ideal system to examine divergence across its …

cl, au, es, Afrique du Sud, ve, gb, us, fr, mc, ar, br (code pays fourni par la source)

Large-scale distribution of cestode infections in wild gentoo penguins and their impact on the host microbiome

Chloe Kaczvinsky, Hila Levy, Stephen Preston, Casey Youngflesh et autres

Intestinal helminths often cause chronic infections, which can impact health and productivity, particularly when combined with other stressors including the environmental challenges faced by polar species. Here we employed a faecal DNA amplicon-sequencing-based approach to study on the epidemiology of tapeworms (Cestoda) …

us, gb (code pays fourni par la source)

The influence of biotic and abiotic factors on the bacterial microbiome of gentoo penguins (Pygoscelis papua) in their natural environment

Chloe Kaczvinsky, Hila Levy, Stephen Preston, Casey Youngflesh et autres

The microbiome is a key factor in the health, well-being, and success of vertebrates, contributing to the adaptive capacity of the host. However, the impact of geographic and biotic factors that may affect the microbiome of wild birds in polar environments is …

gb, us (code pays fourni par la source)

Adaptation and Cryptic Pseudogenization in Penguin Toll-Like Receptors

Steven R. Fiddaman, Michal Vinkler, Simon Spiro, Hila Levy et autres

Penguins (Sphenisciformes) are an iconic order of flightless, diving seabirds distributed across a large latitudinal range in the Southern Hemisphere. The extensive area over which penguins are endemic is likely to have fostered variation in pathogen pressure, which in turn will have …

gb, cz, us, cl, dk, cn, de (code pays fourni par la source)

Identification and Distribution of Novel Cressdnaviruses and Circular Molecules in Four Penguin Species in South Georgia and the Antarctic Peninsula

Hila Levy, Rafaela Salgado Fontenele, Ciara Harding, Crystal Suazo et autres

There is growing interest in uncovering the viral diversity present in wild animal species. The remote Antarctic region is home to a wealth of uncovered microbial diversity, some of which is associated with its megafauna, including penguin species, the dominant avian biota. …

gb, us, fo, ch, Afrique du Sud (code pays fourni par la source)

Identification of Circovirus Genome in a Chinstrap Penguin (Pygoscelis antarcticus) and Adélie Penguin (Pygoscelis adeliae) on the Antarctic Peninsula

Hila Levy, Steven R. Fiddaman, Anni Djurhuus, Caitlin Black et autres

Circoviruses infect a variety of animal species and have small (~1.8–2.2 kb) circular single-stranded DNA genomes. Recently a penguin circovirus (PenCV) was identified associated with an Adélie Penguin (Pygoscelis adeliae) with feather disorder and in the cloacal swabs of three asymptomatic Adélie …

gb, fo, ch, us, Afrique du Sud (code pays fourni par la source)

Evidence of Pathogen-Induced Immunogenetic Selection across the Large Geographic Range of a Wild Seabird

Hila Levy, Steven R. Fiddaman, Juliana A. Vianna, Daly Noll et autres

Over evolutionary time, pathogen challenge shapes the immune phenotype of the host to better respond to an incipient threat. The extent and direction of this selection pressure depend on the local pathogen composition, which is in turn determined by biotic and abiotic …

gb, cl, us, fr, au, Afrique du Sud, mc, es, ar (code pays fourni par la source)

The molecular ecology of the Gentoo Penguin (Pygoscelis papua)

Hila Levy

Gentoo Penguins (Pygoscelis papua) are marine mesopredators facing threats from anthropogenic environmental change, habitat loss, fisheries pressure, pollution, direct disturbance at colonies, and introduced pathogens. These philopatric seabirds breed across the largest geographic and latitudinal range of any penguin taxon. Given the …

Population structure and phylogeography of the Gentoo Penguin (Pygoscelis papua) across the Scotia Arc

Hila Levy, Gemma V. Clucas, Alex David Rogers, Adam D. Leaché et autres

Climate change, fisheries' pressure on penguin prey, and direct human disturbance of wildlife have all been implicated in causing large shifts in the abundance and distribution of penguins in the Southern Ocean. Without mark-recapture studies, understanding how colonies form and, by extension, …

gb, us (code pays fourni par la source)

Limited genetic differentiation among chinstrap penguin (Pygoscelis antarctica) colonies in the Scotia Arc and Western Antarctic Peninsula

Jennifer Freer, Barbara K. Mable, Gemma V. Clucas, Alex David Rogers et autres

gb, us (code pays fourni par la source)

Static and Moving Frontiers: The Genetic Landscape of Southern African Bantu-Speaking Populations

Sarah J. Marks, Francesco Montinaro, Hila Levy, Francesca Brisighelli et autres

A consensus on Bantu-speaking populations being genetically similar has emerged in the last few years, but the demographic scenarios associated with their dispersal are still a matter of debate. The frontier model proposed by archeologists postulates different degrees of interaction among incoming …

gb, it, us, Namibie, Afrique du Sud (code pays fourni par la source)

A reversal of fortunes: climate change ‘winners’ and ‘losers’ in Antarctic Peninsula penguins

Gemma V. Clucas, Michael James Dunn, Gareth J. Dyke, Steven D. Emslie et autres

Climate change is a major threat to global biodiversity. Antarctic ecosystems are no exception. Investigating past species responses to climatic events can distinguish natural from anthropogenic impacts. Climate change produces 'winners', species that benefit from these events and 'losers', species that decline …

gb, us (code pays fourni par la source)