Phylogenomics is extremely powerful but introduces new challenges as no agreement exists on “standards” for data selection, curation and tree inference. We use jawed vertebrates (Gnathostomata) as model to address these issues. Despite considerable efforts in resolving their evolutionary history and macroevolution, few studies have included a full phylogenetic diversity of gnathostomes and some relationships remain controversial. We tested a novel bioinformatic pipeline to assemble large and accurate phylogenomic datasets from RNA sequencing and find...
Convergent evolution of small body size occurs across many vertebrate clades and may reflect an evolutionary response to shared selective pressures. However it remains unclear if other aspects of phenotype undergo convergent evolution in miniaturized lineages. Here we present a comparative analysis of body size and shape evolution in marine angelfishes (Pomacanthidae), a reef fish family characterized by repeated transitions to small body size. We ask if lineages that evolve small sizes show convergent evolution...
Data from: The ‘male escape hypothesis’: sex-biased metamorphosis in response to climatic drivers in a facultatively paedomorphic amphibianAnthony G.E. Mathiron, Jean-Paul Lena, Sarah Baouch, Mathieu Denoël & Anthony G. E. Mathiron
Paedomorphosis is a major evolutionary process that bypasses metamorphosis and allows reproduction in larvae. In newts and salamanders, it can be facultative with paedomorphs retaining gills and metamorphs dispersing. The evolution of these developmental processes is thought to have been driven by the costs and benefits of inhabiting aquatic versus terrestrial habitats. In this context, we aimed at testing the hypothesis that climatic drivers affect phenotypic transition and the difference across sexes because sex-ratio is...
Data from: From animal tracks to fine-scale movement modes: a straightforward approach for identifying multiple, spatial movement patternsKevin Morelle, Nils Bunnefeld, Philippe Lejeune & Steve A. Oswald
1. Thanks to developments in animal tracking technology, detailed data on the movement tracks of individual animals are now attainable for many species. However, straightforward methods to decompose individual tracks into high-resolution, spatial modes are lacking but are essential to understand what an animal is doing. 2. We developed an analytical approach that combines separately-validated methods into a straightforward tool for converting animal GPS tracks to short-range movement modes. Our three-step analytical process comprises: (1)...
Data from: Minimally invasive estimation of ventricular dead space volume through use of Frank-Starling curvesShaun Davidson, Chris Pretty, Antoine Pironet, Thomas Desaive, Nathalie Janssen, Bernard Lambermont, Philippe Morimont & J. Geoffrey Chase
This paper develops a means of more easily and less invasively estimating ventricular dead space volume (Vd), an important, but difficult to measure physiological parameter. Vd represents a subject and condition dependent portion of measured ventricular volume that is not actively participating in ventricular function. It is employed in models based on the time varying elastance concept, which see widespread use in haemodynamic studies, and may have direct diagnostic use. The proposed method involves linear...
Data from: Similar levels of trophic and functional diversity within damselfish assemblages across Indo–Pacific coral reefsLaura Gajdzik, Eric Parmentier, Loïc N. Michel, Nicolas Sturaro, Keryea Soong, Gilles Lepoint & Bruno Frédérich
1. Understanding the forces that influence the dynamics of communities is a key challenge to undertake in changing environments. Despite recent advances in coral reef community ecology, a more comprehensive knowledge about processes (niche related–traits and phylogenies) driving the composition of reef fish community is needed. 2. Here, we conducted a quantitative comparison of these processes in damselfish assemblages that belong to three distinct Indo–Pacific coral reefs differing in taxonomic composition, morphology and degree of...
Data from: Dealing with paralogy in RADseq data: in silico detection and single nucleotide polymorphism validation in Robinia pseudoacacia L.Cindy F. Verdu, Erwan Guichoux, Samuel Quevauvillers, Olivier De Thier, Yec'han Laizet, Adline Delcamp, Frédéric Gévaudant, Arnaud Monty, Annabel J. Porté, Philippe Lejeune, Ludivine Lassois & Stéphanie Mariette
The RADseq technology allows researchers to efficiently develop thousands of polymorphic loci across multiple individuals with little or no prior information on the genome. However, many questions remain about the biases inherent to this technology. Notably, sequence misalignments arising from paralogy may affect the development of single nucleotide polymorphism (SNP) markers and the estimation of genetic diversity. We evaluated the impact of putative paralog loci on genetic diversity estimation during the development of SNPs from...
Size at reproduction is a key aspect of species life history that has been little explored for long-lived tropical trees. In this study, we aimed to quantify reproductive diameter for 31 major timber species across 11 sites in Cameroon, Congo, and Central African Republic. Specifically, we examined (1) whether between-species variability can be explained by a set of seven species traits; (2) whether reproductive diameter varied within-species among sites; (3) whether reproductive status varied with...
Organisms with complex life cycles are characterized by a metamorphosis that allows for a major habitat shift and the exploitation of alternative resources. However, metamorphosis can be bypassed in some species through a process called paedomorphosis, resulting in the retention of larval traits at the adult stage and is considered important at both micro- and macroevolutionary scales. In facultatively paedomorphic populations of newts, some individuals retain gills and a fully aquatic life at the adult...
Data from: Extensive seed and pollen dispersal and assortative mating in the rain forest tree Entandrophragma cylindricum (Meliaceae) inferred from indirect and direct analysesFranck Kameni Monthe, Olivier J. Hardy, Jean-Louis Doucet, Judy Loo, Jérôme Duminil & Jean-Louis Doucet
Pollen and seed dispersal are key processes affecting the demographic and evolutionary dynamics of plant species and are also important considerations for the sustainable management of timber trees. Through direct and indirect genetic analyses, we studied the mating system and the extent of pollen and seed dispersal in an economically important timber species, Entandrophragma cylindricum (Meliaceae). We genotyped adult trees, seeds and saplings from a 400-ha study plot in a natural forest from East Cameroon...
Data from: Maternal obesity increases insulin resistance, low-grade inflammation and osteochondrosis lesions in foals and yearlings until 18 months of ageMorgane Robles, Emilie Nouveau, Camille Gautier, Luis Mendoza, Cédric Dubois, Michèle Dahirel, Bénédicte Lagofun, Marie-Christine Aubrière, Jean-Philippe Lejeune, Isabelle Caudron, Isabelle Guenon, Catherine Viguié, Laurence Wimel, Hélène Bouraima-Lelong, Didier Serteyn, Anne Couturier-Tarrade, Pascale Chavatte-Palmer, M-C Aubrière & J-P Lejeune
Obesity is a growing concern in horses. The effects of maternal obesity on maternal metabolism and low-grade inflammation during pregnancy, as well as offspring growth, metabolism, low-grade inflammation, testicular maturation and osteochondrotic lesions until 18 months of age were investigated. Twenty-four mares were used and separated into two groups at insemination according to body condition score (BCS): Normal (N, n=10, BCS ≤4) and Obese (O, n=14, BCS ≥4.25). BCS and plasma glucose, insulin, triglyceride, urea,...
University of Liège11
Royal Museum for Central Africa1
Technische Universität Braunschweig1
University of Veterinary Medicine Hanover1
Institut de Recherche pour le Développement1
Université Libre de Bruxelles1
French National Centre for Scientific Research1
Centre de Recherches Insulaires et Observatoire de l'Environnement1
Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures1