Sébastien Couette

École Pratique des Hautes Études | EPHE · Laboratoire Biogéosciences

Prof. Judith Masters and Dr. Fabien Génin obituarues

This paper presents a dataset of 3D sagittal left otolith meshes from 339 individual red mullet (Mullus barbatus). These immature specimens were collected from 17 geographical areas covering the entire Mediterranean Sea. Measured biological parameters were: fish total length (TL ± 1 mm, range from 125 to 238 mm), total weight (W ± 0.1 g, range from...

The shape of a fish's otolith varies according to its environment, genetics and life stage. To be able to analyse these shapes, standardisation is a crucial step. In this study, a protocol for standardising and aligning 3D reconstructions of the otolith was proposed, based on the extraction of Spherical Fourier Descriptors. This protocol was approv...

Neurodevelopmental disorders are major indications for genetic referral and have been linked to more than 1,500 loci including genes encoding transcriptional regulators. The dysfunction of transcription factors often results in characteristic syndromic presentations, however, at least half of these patients lack a genetic diagnosis. The implementat...

The otolith is a calcified structure located in the inner ear of fish, commonly used to estimate their age. Its shape can be utilized to differentiate between fish populations. Otoliths from 22 different species have been collected in the English Channel and North Sea regions. By employing 3D images of otoliths, it has become possible to identify t...

Objectives Among living Malagasy primates, the family Lemuridae has previously been recognized as presenting a higher mandibular morphological variation than other families. We conducted a quantitative analysis of mandibular size and shape within the five genera ( Lemur , Eulemur , Hapalemur , Prolemur , and Varecia ) associated with a set of covar...

Knowledge of the spatial structuring of stocks is essential to study the dynamics of fish populations, and thus to manage fisheries. In this study, sagittal otolith shape was used to understand the stock structures of populations of the main commercial species caught around la réunion island. A total of 1091 individuals, belonging to nine species o...

Fisheries management is generally based on age structure models. Thus, fish ageing data are collected by experts who analyze and interpret calcified structures (scales, vertebrae, fin rays, otoliths, etc.) according to a visual process. The otolith, in the inner ear of the fish, is the most commonly used calcified structure because it is metabolica...

Sagittal otolith shape analysis is one of the most widespread techniques worldwide to discriminate fish stock units, as this proxy integrates both environmental and genetic factors. All previous otolith shape studies have been carried out using two-dimensional (2D) images, a partial representation of the whole shape of the otolith. However, prior t...

The vestibular system of the mammalian inner ear senses angular and linear velocity of the head and enables animals to maintain their balance. Vestibular anatomy has been studied extensively in order to link its structure to particular kinds of locomotion. Available evidence indicates that, in primates, slow-moving species show higher levels of ves...

Objectives Phylogenies consistently group the folivorous Lepilemur species with the small‐bodied insectivorous‐frugivorous cheirogaleids. Juvenile lepilemurs and adult cheirogaleids share allometries in most aspects of skull morphology, except the palate. We investigated potential influences on palate shape in these taxa and several outgroups using...

Les habitats marins côtiers des îles subantarctiques françaises concentrent une biodiversité originale qui est aujourd'hui confrontée à des changements environnementaux dont les effets sont encore mal cernés. Comprendre l'impact de ces changements et la réponse des écosystèmes implique de mieux les connaître mais aussi d'établir un suivi régulier e...

Objectives We test the effects of body mass and phylogeny on middle ear cavity pneumatization, and the role of pneumatization in hearing function, spanning the anatomical, ecological, and behavioral diversity of nonhuman primates. Materials and methods All cavities were segmented in middle ear scans of 96 specimens, from 12 strepsirrhine and 15 ha...

Archaeologists spend considerable time orienting and drawing ceramic fragments by hand for documentation, to infer their manufacture, the nature of the discovery site and its chronology, and to develop hypotheses about commercial and cultural exchanges, social organisation, resource exploitation, and taphonomic processes. This study presents a surv...

Abstract. The purpose of this application, under Articles 11, 23, 31 and 32 of the code, is to confirm the availability of and to maintain the usage of the name Galago demidoff Fischer, 1806 for Demidoff’s dwarf galago from western and central Africa and its priority over the objective junior synonym Macropus (Galago) demidovii Fischer, 1808, and t...

Rock art studies are facing major technical challenges for extensive documentation. Nowadays, recording is essentially obtained from time-consuming tracing and rubbing, techniques that also require a high level of expertise. Recent advances in 3D modelling of natural objects and computational treatment of the modelled surfaces may provide an altern...

Samples of one lichen species, Parmotrema crinitum, and one bromeliad species, Tillandsia usneoides, were collected in the state of Rio de Janeiro, Brazil, at four sites differently affected by anthropogenic pollution. The concentrations of aluminum, cadmium, copper, iron, lanthanum, lead, sulfur, titanium, zinc, and zirconiumwere determined by ind...

The DACORD functional system orients and draws archaeological pottery, based on 3D model geometry, using modern mathematical, graphical, optimization methods. The orientation workflow combines existing approaches (normal vectors, horizontal/vertical sections, etc.) with new methods, to segment fragments (external and internal surfaces), and to eras...

European adapids, especially Adapis parisiensis, have been extensively studied over the past two centuries, essentially for taxonomic and phylogenetic purposes. Analyses of dental, cranial and postcranial morphology have led to various hypotheses about the diet, locomotion and lifestyle of this fossil primate species. As the morphology of Adapis pa...

Warm temperatures decrease insect developmental time and body size. Social life could buffer external environmental variations, especially in large social groups, either through behavioral regulation and compensation or through specific nest architecture. Mean worker size and distribution of worker sizes within colonies are important parameters aff...

The family Galagidae (African galagos or bushbabies) comprises five genera: EuoticusGray, 1872; GalagoGeoffroy Saint-Hilaire, 1796; GalagoidesSmith, 1833; OtolemurCoquerel, 1859; and SciurocheirusGray, 1872, none of which is regarded as monotypic, but some (Euoticus and Otolemur) certainly qualify as oligotypic. We argue for the recognition of a si...

Objectives: Based on vocalization recordings of an unknown galago species, our main objectives were to compare morphology and call structure with known closely-related taxa and describe a new species of galago. Materials and methods: We conducted field surveys in three forest habitats along the escarpment region in western Angola (Kumbira Forest...

The primate fauna of South Africa has historically been viewed as comprising three diurnal cercopithecoid taxa ? chacma baboons (Papio ursinus), vervet (Chlorocebus pygerythrus) and samango monkeys (Cercopithecus albogularis) ? and two nocturnal lorisoid species ? the thick-tailed greater galago (Otolemur crassicaudatus) and the southern lesser gal...

Recognition of a particularly derived eco-behavioral strategy for the genus Alouatta has been crucial for studying and understanding its equally derived cranial and postcranial morphology. The unique architecture of the skull and mandible has very likely evolved in relation to both masticatory correlates associated with an increasingly folivorous d...

The true dwarf galagos of the genus Galagoides, G. demidoff and G. thomasi, are difficult to distinguish morphologically at a specific or subspecific level, and most taxonomic designations are based primarily on geographic localities. We used morphometrics to investigate the morphological diversity of the genus. We conducted statistical analyses of...

We carried out a multidisciplinary study linking behavioral and morphological data from a little-known guenon species, Cercopithecus solatus, endemic to Gabon. Over a period of 9 months, we documented the pattern of stratum use associated with postural and locomotor behavior by direct observation (650 hrs) of a semi-free-ranging breeding colony. We...

Cryptic Species and Species Concept in Palaeontology Sébastien Couette Ecole Pratique des Hautes Etudes & UMR uB/CNRS 6282 ‘Biogéosciences’, Dijon, France E-Mail: sebastien.couette @ u-bourgogne.fr Cryptic species and species complexes are great challenges for biologists. New molecular methods lead to the discovery of species complexes, the identi...

Landmarks used for geometric morphometric analysis of the bony labyrinth (specimen: Lepilemur ruficaudatus AIM-11054). Grey arrows anteromedial-to-posterolateral and anterolateral-to-posteromedial directions.

Position within the skull of the left labyrinth of a Adapis parisiensis b Otolemur crassicaudatus, c Tarsius syrichta and d Callithrix jacchus. Left: superior view of the skull and left labyrinth, the superior part of the calvaria being virtually removed. Right stereoscopic lateral view of the left labyrinth within the braincase. In Adapis parisien...

The publication of a well preserved Eocene primate, Darwinius masillae (Cercamoniinae, Notharctidae), has revived the debate on the phylogenetic relationships of Adapiformes and extant primates (Franzen et al., PLos ONE 4(5):e5723, 2009). Recently, Lebrun et al. (J Anat 216:368–380, 2010) showed that the morphology of the bony labyrinth of strepsir...

The genus Mesopithecus is well represented in the late Miocene of Greece by several recognized species. The present paper investigates functional aspects of the humeri of Mesopithecus delsoni/pentelicus, M. pentelicus and M. aff. pentelicus of several Turolian sites from central and northern Greece, using multivariate approaches. For these purposes...

Geometric morphometric methods constitute a powerful and precise tool for the quantification of morphological differences. The use of geometric morphometrics in palaeontology is very often limited by missing data. Shape analysis methods based on landmarks are very sensible but until now have not been adapted to this kind of dataset. To analyze the...

The European Eocene adapiforms include two subfamilies, the Cercamoniinae, present in the early and middle Eocene, and the Adapinae, present in the late Eocene (Franzen, 1994; Godinot, 1998; Fleagle, 1999; Gebo, 2002). The large adap-ine species has a robust upper canine and other characters. It was named Adapis magnus by Filhol (1874), and was lat...

The European Eocene adapiforms include two subfamilies, the Cercamoniinae, present in the early and middle Eocene, and the Adapinae, present in the late Eocene (Franzen, 1994; Godinot, 1998; Fleagle, 1999; Gebo, 2002). The large adapine species has a robust upper canine and other characters. It was named Adapis magnus by Filhol (1874), and was late...

The cranial morphology of 28 specimens of night monkeys (genus Aotus) was examined using three-dimensional geometrical morphometrics. New results of the morphological differences between two populations of Aotus infulatus from both banks of the Rio Tocantins are proposed. These morphological results totally agree with the genetic distinction of the...

Morphometric data sets are often phenetically analyzed by using various kinds of spatial, metric, or nonmetric multivariate analyses. Such methods produce results that are difficult to compare directly with molecular or morphological phylogenetic hypotheses, which are usually expressed by using nonspatial tree representations. Therefore, it is usef...