Pierre-André Crochet

Pierre-André Crochet
French National Centre for Scientific Research | CNRS · Centre d'Ecologie Fonctionnelle et Evolutive

Professor

About

408
Publications
120,318
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6,137
Citations
Citations since 2016
105 Research Items
3739 Citations
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20162017201820192020202120220200400600
20162017201820192020202120220200400600
20162017201820192020202120220200400600

Publications

Publications (408)
Article
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Aim: Hyper-arid sandy and rocky fields rank among the least biologically diverse habitats of the desert biome, yet knowledge of local biodiversity patterns is also extremely poor. In the Sahara Desert, palaeoclimate oscillations affected the extent of hyper-arid habitats, but it is unclear how these dynamics determined the evolution and distributio...
Article
Full-text available
Une nouvelle liste taxinomique de référence est établie pour les Amphibiens et les « Reptiles » de la Tunisie. À côté du nom scientifique zoologique international, un nom scientifique français est joint à chaque taxon. L'herpétofaune tunisienne compte actuellement sept espèces d' Amphibiens et 62 de « Reptiles ». Mots-clés : Amphibiens, noms scient...
Preprint
Full-text available
Aim Discontinuity in the distribution of genetic diversity (often based on mtDNA) is usually interpreted as evidence for phylogeographic breaks, underlying vicariant units. However, misleading signal of phylogeographic break can arise in the absence of barrier to gene flow, under mechanisms of isolation by distance (IBD). How and under which condit...
Preprint
Full-text available
Linnaean and Wallacean shortfalls (Uncertainties on species taxonomy and distribution, respectively) are major factors hampering efficient conservation planning in the current context of biodiversity erosion. These shortfalls concern even widespread and abundant species in relatively well-studied regions such as the Mediterranean biodiversity hotsp...
Article
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Western European Water Frog species can be morphologically very similar, especially Pelophylax ridibun­dus and P. perezi. As these species, together with P. lessonae, produce hybridogenetic lineages with highly variable phenotypes, the morphological identification of taxa in this genus remains challenging. This is especially problematic in the curr...
Article
Full-text available
DNA barcode reference libraries are now continuously produced for the tree of life, which are essential pillars for the study of biological diversity. Yet, our knowledge about global diversity is largely limited in undersampled regions such as the largest warm desert, the Sahara-Sahel. This dataset provides a DNA barcode reference library for the r...
Article
As reflected by the two rules of speciation (Haldane’s rule and the large X-/Z-effect), sex chromosomes are expected to behave like supergenes of speciation: they recombine only in one sex (XX females or ZZ males), supposedly recruit sexually antagonistic genes and evolve faster than autosomes, which can all contribute to pre-zygotic and post-zygot...
Article
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Despite posing a serious threat to global biodiversity, national and international management efforts have not been able to limit the spread of most invasive species. In highly dispersive species, local invasions may be followed by regional range expansion that crosses international borders. In such cases, independent management efforts of the inva...
Article
We examined the taxonomy of the minute desert geckos of the Tropiocolotes nattereri species complex using the largest morphological sampling, and the first molecular assessment of intraspecific diversity within this complex. We examined variation in mitochondrial and nuclear markers (12S, ND2, c-mos and MC1R) of 30 samples and analyzed the external...
Preprint
Full-text available
Male homosexual orientation remains a Darwinian paradox, as there is no consensus on its evolutionary determinants. One intriguing feature of homosexual men is their higher male birth rank compared to heterosexual men. This can be explained by two non-exclusive mechanisms: an antagonistic effect (AE), implying that more fertile women have a higher...
Preprint
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A bstract When environmental conditions are unpredictable, expressing alternative phenotypes spreads the risk of failure, a mixed strategy called bet-hedging. In the southern part of its range, the Parsley Frog Pelodytes punctatus breeds both in autumn and in spring. Our aim was to study the breeding phenology and reproductive success associated wi...
Article
Coexistence with related species poses evolutionary challenges to which populations may react in diverse ways. When exposed to similar environments, sympatric populations of two species may adopt similar phenotypic trait values. However, selection may also favor trait divergence as a way to reduce competition for resources or mates. The characteris...
Article
Full-text available
The description of Vipera walser from the Northern Italian Alps as a new species (Ghielmi et al., 2016, Journal of Zoological Systematics and Evolutionary Research, 54, 161) was one of the most unexpected surprises of European herpetology in the 21st century. In mitochondrial (mt) DNA, it is closely related to a group of vipers only present in the...
Article
The evolution of migration routes in birds remains poorly understood as changes in migration strategies are rarely observed on contemporary timescales. The Richard’s Pipit, a migratory songbird breeding in Siberian grasslands and wintering in Southeast Asia, has only recently become a regular autumn and winter visitor to western Europe. Here, we ex...
Article
The slow-worm lizards (Anguis) comprise five species occurring throughout most of the Western Palearctic. Although these species are relatively uniform morphologically – with the exception of A. cephallonica, which exhibits a quite unique morphology – they are genetically deeply divergent. Here, we provide detailed distribution maps for each species...
Article
Full-text available
Aim The biogeographic history of the Sahara-Sahel desert is tightly linked to its extreme and fluctuating palaeoclimate and diverse topography. For the mesic species inhabiting the region, coastal areas and the Nile Valley are perceived as the main pathways to disperse through desert habitats, but past connections may have also occurred throughout...
Article
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Reproductive isolation is instrumental to the formation of new species (speciation), but it remains largely enigmatic how many incompatibilities are required to prevent hybridization and where they lie across the genome. By studying patterns of admixture in amphibian hybrid zones, we found that reproductive isolation is initiated by numerous small-...
Article
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en Numerous molecular studies emphasized how past climatic oscillations in the Sahara-Sahel have left strong imprints on current biodiversity patterns and identified the Atlantic coast and the Northwest African Mountains as refugia and speciation hotspots. Yet, the biodiversity inventory in the region is still far from complete. We use an integrati...
Article
Unravelling when divergent lineages constitute distinct species can be challenging, particularly in complex scenarios combining cryptic diversity and phylogenetic discordances between different types of molecular markers. Combining a phylogenetic approach with the study of contact zones can help to overcome such difficulties. The Podarcis hispanicu...
Article
We report the discovery of a population of the exotic North African Water Frog Pelophylax saharicus around the Etang de Berre, on the Mediterranean coast of France, about 25 km north-west of Marseille. The animals had been originally identified as P. perezi or P. kl. grafi by a combination of acoustic and morphological characters and their true ide...
Article
Full-text available
Our study seeks to: (1) reduce biodiversity knowledge gaps in amphibians from desert and arid regions; (2) quantify species diversity and detect potential cryptic diversity; (3) identify environmental correlates of amphibian richness distribution, and (4) identify diversity hotspots. DNA barcoding and spatial modelling were integrated to map observ...
Article
Full-text available
Aim Deserts are generally perceived as areas of low diversity, and hence receive little attention from researchers and conservationists. Squamates are the dominant group of vertebrates in arid regions, and as such represent an ideal model to study biodiversity patterns in these areas. We examine spatial patterns of diversity, evolutionary history a...
Article
Plate tectonics constitute one of the main mechanisms of biological diversification on Earth, often being associated with cladogenetic events at different phylogenetic levels, as well as with exchange of faunas and floras across previously isolated biogeographic regions. North Africa and Arabia share a complex geological history that dates back to...
Article
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Aim To test the hypothesis that spatial variations in climate and land use explain the distribution and diversity of reptiles’ ecological traits in a biodiversity hotspot of the Mediterranean basin. Location French Mediterranean region. Taxon Reptiles (25 species). Methods We defined 288 species assemblages from 27,858 opportunistic occurrence r...
Technical Report
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IUCN assessment report of the North African Green Frog, Pelophylax saharicus
Article
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Recent empirical studies have demonstrated that speciation with gene flow is more common than previously thought. From a conservation perspective, the potential negative effects of hybridization raise concerns on the genetic integrity of endangered species. However, introgressive hybridization has also been growingly recognized as a source of diver...
Article
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A new species of gecko of the genus Hemidactylus (Squamata: Gekkonidae) is described from São Nicolau Island, Cabo Verde Archipelago, and the Sal and Boavista island populations of Hemidactylus boavistensis (i.e., Hemidactylus boavistensis boavistensis comb. nov. and Hemidactylus boavistensis chevalieri comb. nov.) are recognized as subspecies. Hem...
Article
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The growing interest in the lability of sex determination in non-model vertebrates such as amphibians and fishes has revealed high rates of sex chromosome turnovers among closely related species of the same clade. Can such lineages hybridize and admix with different sex-determining systems, or could the changes have precipitated their speciation? W...
Article
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Aim: Global variation in animal colouration has inspired ecogeographical rules that suggest common patterns of recurrent adaptations to climate. However, little attention has been paid to the relative influence of the different climatic conditions encountered by species during their annual life cycle. We explored this question by testing whether br...
Article
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The interbreeding of individuals coming from genetically differentiated but incompletely isolated populations can lead to the formation of admixed populations, having important implications in ecology and evolution. In this simulation study, we evaluate how individual admixture proportions estimated by the software structure are quantitatively affe...
Article
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The last species list of the European herpetofauna was published by Speybroeck, Beukema and Crochet (2010). In the meantime, ongoing research led to numerous taxonomic changes, including the discovery of new species-level lineages as well as reclassifications at genus level, requiring significant changes to this list. As of 2019, a new Taxonomic Co...
Technical Report
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This report includes the first records for Egypt of Broad-billed Roller Eurystomus glaucurus, Bearded Reedling Panurus biarmicus and Banded Martin Riparia cincta, which are all additions to category A of the Egyptian list.
Article
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Mediterranean tree frogs, Hyla gr. meridionalis Boettger, 1874 (Anura: Hylidae) are widespread around the Western Mediterranean Basin, where they naturally occur across the Maghreb (Morocco, Algeria, Tunisia). Individuals of diverse Moroccan origins have been introduced and have expanded throughout the Iberian Peninsula, southern France and norther...
Article
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Insular ecosystems share analogous ecological conditions, leading to patterns of convergent evolution that are collectively termed as the ‘island syndrome’. In birds, part of this syndrome is a tendency for a duller plumage, possibly as a result of relaxed sexual selection. Despite this global pattern, some insular species display a more colourful...
Article
We generated an extensive morphological and multilocus molecular dataset to investigate the taxonomy of Acanthodactylus erythrurus, a widespread species across the Mediterranean and semiarid habitats of the Iberian Peninsula and the Maghreb. Our integrated analyses revealed the existence of at least five basal lineages: (i) an Ibero-Moroccan clade...
Article
Full-text available
Molecular ecologists often rely on phylogenetic evidence for assessing the species-level systematics of newly-discovered lineages. Alternatively, the extent of introgression at phylogeographic transitions can provide a more direct test to assign candidate taxa into subspecies or species categories. Here we compared phylogenetic versus hybrid zone a...
Article
Full-text available
Batesian mimicry is a canonical example of evolution by natural selection, popularized by highly colorful species resembling unrelated models with astonishing precision. However, Batesian mimicry could also occur in inconspicuous species and rely on subtle resemblance. Although potentially widespread, such instances have been rarely investigated, s...
Article
Full-text available
Based on molecular, morphological and field data, the status and zoogeography of the taxa of the Psammophis sibilans group north of 12°S are reviewed. Molecular data including sequences from 20 of the 22 described species known to occur north of 12°S suggest that P. sibilans distribution is restricted to northeastern Africa, from Egypt to Ethiopia....
Article
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Batesian mimicry refers to a harmless species protecting itself from predators by mimicking a harmful species. A case of acoustic Batesian mimicry has been proposed in the naturalist literature: it is suspected that birds called like a snake when disturbed in their cavities to deter mammalian predators or repel competitors. To evaluate this hypothe...
Preprint
Full-text available
Batesian mimicry, with its highly colorful species and astonishing mimic-model resemblance, is a canonical example of evolution by natural selection. However, Batesian mimicry could also occur in inconspicuous species and rely on subtle resemblance. Although potentially widespread, such instances have been rarely investigated, such that the real fr...
Article
Full-text available
Climate is one of the main factors driving species distributions and global biodiversity patterns. Obtaining accurate predictions of species’ range shifts in response to ongoing climate change has thus become a key issue in ecology and conservation. Correlative species distribution models (cSDMs) have become a prominent tool to this aim in the last...
Article
Full-text available
Male homosexual preference (MHP) is an evolutionary enigma because it is partially heritable and imposes a fertility cost. In occidental societies, homosexual men are feminized at various levels and they have more older brothers than heterosexual men. To evaluate whether femininity and the fraternal birth order (FBO) effect are universal features o...
Article
Full-text available
Une nouvelle liste taxinomique de référence est établie pour les Amphibiens et les Sauropsides non aviens (= « Reptiles ») de la France métropolitaine. Elle tient compte des publications les plus récentes. À côté du nom scientifique zoologique, un nom scientifique français est joint à chaque taxon. Summary- New taxonomic checklist of the herpetof...
Article
Full-text available
Cryptic phylogeographic diversifications are unique models to examine the role of phylogenetic divergence on the evolution of reproductive isolation, without extrinsic factors such as ecology. Yet, to date very few comparative studies were attempted within such radiations. Here, we characterize a new speciation continuum in a group of widespread Eu...
Data
Lipophilic compounds found in P. liolepis femoral pore secretions from two populations in the Midi-Pyrenees. (DOC)
Data
Factor loadings for the PCA on ventral coloration of Podarcis liolepis lizards. (DOCX)
Data
Factor scores for the PCA on ventral coloration of Podarcis liolepis lizards. (DOCX)
Data
Summary statistics (mean + SE) for ventral and dorsal coloration in P. liolepis lizards. (DOCX)
Data
Factor scores for the PCA on dorsal coloration of Podarcis liolepis lizards. (DOCX)
Data
Lipophilic compounds found in P. liolepis femoral pore secretions from two populations in the Midi-Pyrenees. (DOCX)
Data
GenBank accesión number for the genetic samples used in this study. PL codes refer to P.liolepis individuals sampled in the Midi-Pyrenees. Med1 and Bur2 (from Medinaceli and Burgos, respectively) and MT1 (P. muralis) are sequences obtained from GenBank. (DOCX)
Data
Factor loadings for the PCA on dorsal coloration of Podarcis liolepis lizards. (DOCX)