WorldCat Identities

Levy, Frédéric (1957- ...).

Overview
Works: 24 works in 34 publications in 2 languages and 193 library holdings
Roles: Publishing director, Thesis advisor, Other, Author, Opponent, Editor
Publication Timeline
.
Most widely held works by Frédéric Levy
Éthologie animale : une approche biologique du comportement( Book )

5 editions published between 2015 and 2019 in French and held by 158 WorldCat member libraries worldwide

La 4e de couverture indique : "Qu'est-ce que l'éthologie? Comment comprendre le comportement animal? Comment celui-ci se met-il en place au cours du développement d'un individu? Peut-il être optimal? Comment l'animal utilise-t-il son espace, exploite-t-il ses ressources alimentaires et noue-t-il des relations sociales? L'animal a-t-il une personnalité? Accessible, pédagogique et richement illustré, ce manuel présente les réponses les plus actuelles et synthétiques aux grandes questions portant sur le comportement animal. Rédigé par plusieurs chercheuses et chercheurs spécialistes du domaine, il expose les concepts et les méthodologies de la discipline et aborde certaines questions inédites, comme celle de la personnalité ou de la relation avec l'animal. "Éthologie animale" intéressera particulièrement les étudiants en biologie et en psychologie, de même que les chercheurs et enseignants désireux d'approfondir ou d'actualiser leur connaissance du comportement animal."
Processus d'acquisition et de consolidation impliqués dans la mémorisation des caractéristiques multisensorielles du jeune par la brebis : approches comportementale et neurobiologique by Matthieu Keller( Book )

2 editions published in 2003 in French and held by 3 WorldCat member libraries worldwide

Chez les ovins, la mère reconnaît l'odeur de son jeune juste après la parturition et restreint alors l'allaitement à cet agneau. L'objectif de cette thèse est de caractériser la dynamique d'apprentissage et de rétention de la reconnaissance de l'agneau ainsi que les structures neurobiologiques impliquées. La reconnaissance olfactive de l'agneau est fonctionnelle en 2h post-parfum et lors de cet apprentissage, l'expression de la protéine Fos révèle que diverses structures sont activées, notamment le noyau cortical de l'amygdale, L'inaction de ce noyau ainsi que celle du noyau médian par un anesthésique, entraîne un déficit de reconnaissance. Enfin, au cours du temps de contact mère-jeune, une reconnaissance durable de l'agneau se met en place. Elle s'accompagne d'une activation de la protéine Fos plus marquée dans les cortex frontaux lors du rappel. Cette étude a montré l'importance des structures limbiques dans l'acquisition de la mémoire et des structures corticales dans son rappel
CONTRIBUTION A L'ANALYSE DES MECANISMES DE MISE EN PLACE DU COMPORTEMENT MATERNEL CHEZ LA BREBIS (OVIS ARIES L.) : ETUDE DE LA REPULSION ET DE L'ATTRACTION VIS-A-VIS DU LIQUIDE AMNIOTIQUE, MISE EN EVIDENCE, DETERMINISME, ROLE by Frédéric Levy( Book )

1 edition published in 1985 in French and held by 3 WorldCat member libraries worldwide

POUR LA BREBIS PRIMIPARE OU MULTIPARE LE LIQUIDE AMNIOTIQUE (L.A.) EST REPULSIF PENDANT LE CYCLE OESTRIEN ET LA GESTATION, IL NE DEVIENT ATTRACTIF QU'AU MOMENT DE LA PARTURITION. UN COMPORTEMENT SEMBLABLE EST OBSERVE CHEZ LA VACHE BIEN QUE CHAQUE PHASE SOIT MOINS PRONONCEE. LA REPULSION ET L'ATTRACTION SONT SOUS CONTROLE OLFACTIF; L'ATTRACTION EST INDUITE DE FACON SYNERGIQUE PAR L'OESTRADIOL ET LA STIMULATION VAGINALE. LE RETRAIT DU L.A. PAR LAVAGE DU NOUVEAU-NE A PEU D'INFLUENCE CHEZ LA MULTIPARE, MAIS CHEZ LA PRIMIPARE IL EMPECHE LA MISE EN PLACE DU COMPORTEMENT MATERNEL. L'APPORT DU L.A. SUR UN AGNEAU ETRANGER DE 24H CONDUIT A SON ACCEPTATION CHEZ LA MULTIPARE
Le comportement maternel et la reconnaissance du jeune chez les ovins : structures cérébrales et processus mnésiques impliqués by Gaëlle Perrin( Book )

2 editions published in 2007 in French and held by 2 WorldCat member libraries worldwide

The aim of this work is to investigate the brain sites involved in the onset and the maintenance of maternal behaviour as well as in selectivity, and to characterize the memory processes involved in offspring recognition (consolidation and reconsolidation). We showed the involvement of the MPOA and to a lesser extent of the BNST in maternal responsiveness, and the involvement of the cortical and the medial nuclei of the amygdala in recognition of the familiar lamb. We also showed the existence of a protein synthesis dependent process of reconsolidation of the lamb's characteristics, but not of a protein synthesis dependent process of consolidation. Overall, these results indicate that maternal responsiveness and selectivity are controlled by distinct neural networks and that a social memory can undergo a reconsolidation process
Le tempérament du cheval : étude théorique : application à la sélection des chevaux destinés à l'équitation by Léa Lansade( Book )

2 editions published in 2005 in French and held by 2 WorldCat member libraries worldwide

Temperament is defined as a set of behavioural characteristics which are stable over time and across situations, called “traits”. This stability means that, to a certain extent, the behaviour of the individual is predictable. By testing the stability of behavioural responses in various situations and over time (between 8 months to 2.5 years of age), we identified four temperamental traits, which are relatively or totally independent of each other: fearfulness, social motivation, responsiveness to humans and locomotor activity. For each of these traits, we developed a set of standardised tests and identified the most appropriate behavioural indicators to characterise them. The second part of the study examined the ontogeny of temperament at a young age (between 3 and 24 weeks), particularly that of fearfulness and responsiveness to humans. This work showed that these traits are not expressed through specific behaviour at a very young age but appear progressively with time. Thus, it is not possible to predict temperament in very young foals. However, once a foal expresses a particular response, this remains stable over time and is therefore predictable. The third part of the study investigated the influence of genetics and environmental factors on temperament development. The study of genetic factors showed a sire and a sex effect on most of the traits previously identified. In particular, males were more fearful, more responsive to humans, less active and had weaker social motivation than females. The study of environmental factors showed that early experiences, such as foal handling, can have persistent effects on certain aspects of temperament, but only if they are present during particularly sensitive periods, such as weaning. The final part of the work identified the relationship between the temperamental traits previously identified and the horse's suitability to be used for leisure or sport. From a practical point of view, this means that foals to be used as adults can be tested as early as 8 months to predict their behavioural qualities
Clusters of DCX+ cells "trapped" in the subcortical white matter of early postnatal Cetartiodactyla (Tursiops truncatus, Stenella coeruloalba and Ovis aries) by Chiara La Rosa( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Immunogenicity of the carcinoembryonic antigen derived peptide 694 in HLA-A2 healthy donors and colorectal carcinoma patients by Pedro M. S Alves( )

1 edition published in 2007 in English and held by 2 WorldCat member libraries worldwide

Molecular and immunological evaluation of the expression of cancer/testis gene products in human colorectal cancer by Pedro M. S Alves( )

1 edition published in 2006 in English and held by 2 WorldCat member libraries worldwide

Mécanismes et bases sensorielles de la discrimination sociale entre jeunes chez les ovins : étude comportementale by Séverine Ligout( Book )

2 editions published in 2004 in French and held by 2 WorldCat member libraries worldwide

We demonstrated that two mechanisms are involved in social recognition by lambs : direct familarisation (which allows subsequent recognition of familiar individuals) and indirect familiarity (in which individuals that have not been previously encountered are discriminated based upon their phenotypic resemblance to the subject lamb or to a lamb with which the suject is familiar). The presence of the mother also plays an important role in the development of discriminative interactions between young lambs (twins and unrelated agemates). Amongst the sensory modalities that were studied (olfaction, audition, vision), no single one was found to be necessary for discrimination between agemates. However, each one is sufficient for twin recognition but not for familiar unrelated individuals discrimination (only auditory cues are then sufficient). These results indicate that social discrimination is multi-sensory and that twin recognition is more efficient than recognition of non-kin individuals
Perception des mélanges d'odeurs : étude comportementale et psychophysique chez le lapin nouveau-né et l'homme adulte by Charlotte Sinding( Book )

2 editions published in 2012 in French and held by 2 WorldCat member libraries worldwide

Through our senses, we can grasp the complexity of the stimuli that arise from our surroundings. Within the animal kingdom, two systems of information processing exist: one elemental and the other configural. Which factors promote each of these types of perception? Do they persist across lifespan? Do they vary from one species to another? In part, these issues were addressed simultaneously in human adults and newborn rabbits, within the general framework of odour mixture perception (more or less complex: 2-6 odorants), including the perception of blending mixtures.Firstly, our results highlight that in humans individual sensitivity (detection thresholds) modulates the perception of a binary blending mixture. Secondly, repeated experience with the components of a mixture promotes the elemental perception of the mixture both in humans and rabbits, while experience of the mixture promotes its configural perception only in rabbits. Thirdly, in both species, a same complex mixture of six odorants seems to trigger the perception of a configuration (specific to the blending effect); this is however not the case of any mixture of similar complexity. Besides, newborn rabbits display more pronounced elemental skills for this mixture. Finally, a prospective fMRI study was conducted in humans to investigate the neurophysiological correlates of these two modes of perception.The present findings confirm that the olfactory system can work both configurally and elementally, sometimes in the same way for similar mixtures in individuals from different species, and at different stages of development. This dual activity of the olfactory system is modulated by factors inherent to individuals and to mixtures themselves
Neuro-éthologie de la reconnaissance multisensorielle du jeune par sa mère chez les ovins : implication du système cholinergique central by Guillaume Ferreira( Book )

2 editions published in 2000 in French and held by 2 WorldCat member libraries worldwide

Chez les ovins, la mère reconnait l'odeur de son jeune juste après la mise-bas et restreint alors l'allaitement à cet agneau. Elle développe également une reconnaissance visuelle et auditive lui permettant de localiser son agneau à distance. Cette reconnaissance filiale offre donc un modèle original d'apprentissage par la signification biologique du stimulus et son caractère multisensoriel. L'objectif de ce travail était de caractériser l'implication du système cholinergique central. Compte tenu des particularités de cet apprentissage, l'importance de ce système a été mise en évidence dans la reconnaissance du jeune et dans un apprentissage discriminatif visuel, non social. A cette fin, une approche pharmacologique évaluant l'importance de l'activation de récepteurs cholinergiques muscariniques centraux et une approche lésionnelle immunociblée des neurones cholinergiques du télencéphale basal (TB) ont été entreprises. Le blocage des récepteurs muscariniques centraux, par la scopolamine, perturbe l'acquisition des caractéristiques olfactives, visuelles et auditives du jeune ainsi que l'apprentissage de la tâche discriminative visuelle. De plus, l'activation des récepteurs muscariniques centraux intervient également dans les capacités de rétention de l'odeur de l'agneau, lorsque le contact mère-jeune préalable n'excède pas 8 heures. Une étude immunohistochimique a révélé au niveau du TB que les neurones cholinergiques étaient les seuls porteurs du récepteur p75 au facteur de croissance neuronal. Cette caractéristique a permis d'obtenir des lésions importantes et spécifiques de ces cellules grâce à l'utilisation d'une immunotoxine, la Me20.4-igG saporine, qui détruit uniquement les neurones porteurs du récepteur p75. Les lésions immunotoxiques importantes (> 75% des neurones du TB) ont engendré des déficits de la reconnaissance olfactive et visuelle/auditive de l'agneau et de l'apprentissage discriminatif visuel. L'ensemble de ces résultats met en évidence l'intervention cholinergique via l'activation des récepteurs muscariniques par la libération d'acétylcholine des neurones du TB. De plus, ces données indiquent que, dans nos conditions expérimentales, l'action du système cholinergique central ne dépend ni du type d'apprentissage ni de la modalité sensorielle sollicitée. Ce travail souligne l'intérêt de la reconnaissance filiale chez la brebis comme modèle d'étude des mécanismes neurobiologiques impliqués dans les processus mnésiques
Exposure to young preferentially activates adult-born neurons in the main olfactory bulb of sheep mothers by Rafaele Corona( )

1 edition published in 2016 in English and held by 2 WorldCat member libraries worldwide

Multimodal mother-offspring recognition in the Australian sea lion, Neophoca cinerea by Kaja Wierucka( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

Recognition plays an important role in animal communication systems and individuals often employ different sensory modalities to enact this activity. Although recognition has been widely investigated, especially for mother-offspring interactions, there is a dearth of information about multimodal recognition and the relative importance and interactions of various sensory cues. In this thesis, I explored multimodal communication in a colonial mammal - the Australian sea lion (Neophoca cinerea). Communication during mother-pup reunions is known to be multimodal in this species, yet the underlying processes of olfactory and visual recognition, as well as the interactions between acoustic, visual and olfactory cues remain unclear. Through chemical analyses, I determined whether chemical profiles differ among sex and age classes, colonies, and body regions of animals. Chemical similarities between mothers and pups indicate that phenotype matching may be used by Australian sea lions for olfactory recognition. I examined the role of visual cues in mother-pup recognition and found that age-specific visual cues assist mothers to refine their search for their offspring in the colony. Pups are capable of distinguishing various visual cues that can be used in the assessment of conspecifics. Having provided baseline information about the role of sensory cues in isolation, I determined how acoustic, olfactory, and visual cues are used in a synergistic way to ensure accurate mutual recognition and then interpreted the results using a cost-benefit perspective to disentangle the evolutionary pressures on each component of this communication system. I showed that although cues have the ability to convey given information in isolation, their role may be different when other sensory cues are present. Furthermore, there is a mutual dependency in the communication system, where the limitations imposed on one participant of the dyad affect cue use by the other. These findings contribute to a better understanding of mammal mother-offspring recognition and communication mechanisms in vertebrates
Effets du stress chronique sur les systèmes de mémoire et la neurogénèse chez la caille japonaise : influence de l'émotivité by Flore Lormant( )

1 edition published in 2018 in French and held by 1 WorldCat member library worldwide

In mammals, chronic stress alters spatial memory functioning and it could be partly due to an inhibition of hippocampal neurogenesis. In addition, chronic stress would be more deleterious in individuals with a high emotionality trait. The objective of the thesis was to test these hypotheses in the Japanese quail. Our results show that chronic stress specifically alters hippocampal neurogenesis and spatial memory in quail. Nevertheless, these effects are not modulated by the emotionality trait of birds. On the other hand, emotionality regulate interactions between systems of spatial and cued memories. Whereas in birds with a low emotionality trait, these systems would be relatively independent, they would interact in birds with a high emotionality trait. Therefore, the effects of chronic stress on spatial memory would also affect cued memory in individuals with a high emotionality trait
Influence du tempérament sur les performances d'apprentissage et de mémoire chez le cheval equus caballus : étude de sa modulation par le stress by Mathilde Valenchon( )

1 edition published in 2013 in French and held by 1 WorldCat member library worldwide

L'objectif de cette thèse était de caractériser les relations entre tempérament et performances cognitives chez le cheval et leur modulation par le stress. Le tempérament était évalué selon cinq dimensions: la peur, la réactivité à l'Homme, la grégarité, la sensibilité tactile et l'activité locomotrice. Les relations entre ces dimensions et les performances lors de tâches instrumentales et de mémoire de travail ont été recherchées. La dimension de peur semble particulièrement essentielle et son influence dépend du stress : elle aurait un effet positif sur les performances cognitives en cas de stress intrinsèque, c'est-à-dire lorsque la tâche est elle-même source de stress, et un effet négatif en cas de stress extrinsèque. En l'absence de facteur de stress, ces relations sont plus contrastées. Dans une moindre mesure, des relations entre performances cognitives et les autres dimensions de tempérament ont été observées. L'activité locomotrice a une influence positive sur les performances qui ne ressort qu'en présence de facteurs de stress, qu'ils soient extrinsèques ou intrinsèques. Ce travail de thèse permet de contribuer à la caractérisation des liens entre tempérament et cognition, qui est un champ d'étude en pleine expansion, et met en évidence l'importance du stress dans la compréhension ces relations
Bases neurales des préférences olfactives by Florence Kermen( )

1 edition published in 2012 in French and held by 1 WorldCat member library worldwide

La valence hédonique des odeurs (leur caractère plus ou moins plaisant) est une dimension primordiale de l'olfaction chez l'homme. Les préférences olfactives sont fortement façonnées par l'expérience, la culture et le contexte. Cependant, des études récentes montrent qu'elles seraient également partiellement dictées par les propriétés physicochimiques des molécules odorantes. L'objectif de ce travail est d'une part de préciser les paramètres physico-chimiques des odorants déterminant la dimension hédonique de la perception. D'autre part, nous avons recherché comment le premier relais cortical olfactif, le bulbe olfactif (BO) encode la valence hédonique des odeurs, qu'elle soit spontanée ou modulée par l apprentissage. Dans une première partie, nous avons exploré l'effet de la complexité des odorants sur la perception olfactive chez l'homme. Nous avons montré que ce paramètre influence à la fois la complexité perceptuelle (le nombre de notes olfactives évoquées) et la valence hédonique des odeurs. Ceci suggère que le système olfactif est capable de coder la valeur hédonique à partir de la molécule odorante chez l'homme. Dans une seconde partie, nous avons mis à profit la conservation de l'organisation anatomofonctionnelle du système olfactif chez les mammifères pour explorer, dans le modèle murin, la représentation de la valence hédonique des odeurs dans le BO. Nous avons analysé la réponse bulbaire à des odorants non biologiques plus ou moins complexes, et donc attractifs, grâce à la cartographie de l'expression des gènes précoces Zif268 et cFos. Nous mettons en évidence une activation postérieure du BO plus importante pour les odeurs les moins attractives. Dans une dernière partie, nous avons examiné la plasticité des représentations bulbaires quand la valence hédonique de l'odorant change. La valence des odorants a été modifiée chez la souris par apprentissage associatif appétitif ou aversif. La réponse bulbaire a ensuite été examinée en fonction de la valence acquise des odeurs. Nous montrons que lorsqu'un même odorant passe d'une valence positive à une valence négative, l'activité des interneurones granulaires diminue dans la partie postérieure du BO. Ceci indique un rôle de la distribution antéro-postérieure de l'activité bulbaire dans le codage de la valence hédonique apprise des odeurs. En raison du renouvellement constant des interneurones bulbaires à l'âge adulte, impliqués dans la mémoire associative olfactive, l effet de la modulation de la valence des odeurs sur la neurogenèse a également été déterminé. De façon intéressante, la neurogenèse adulte est impliquée dans ce processus car l'activité des cellules granulaires nouvellement formées diminue également dans le BO postérieur en réponse à l'odeur devenue aversive. Ainsi, les deux dernières parties suggèrent une plasticité de la représentation de la valeur hédonique sur l'axe antéro-postérieur selon que la préférence est spontanée ou acquise. Dans leur ensemble, ces trois études montrent d'une part que la complexité moléculaire des odorants est un facteur déterminant de la valence hédonique de l'odeur chez l'homme et la souris. D'autre part, elles démontrent l'existence d'une trace neurale de la valence spontanée ou apprise des odeurs, exprimée le long de l'axe antéro-postérieur du BO, révélant une nouvelle régionalisation fonctionnelle du BO
Autoradiographic detection of vasopressin binding sites, but not of oxytocin binding sites, in the sheep olfactory bulb( )

1 edition published in 1992 in English and held by 1 WorldCat member library worldwide

Les réponses de peur chez la caille japonaise : approches neurobiologique et comportementale. by Hélène Saint-Dizier( )

1 edition published in 2008 in French and held by 1 WorldCat member library worldwide

Most investigations of the neural mechanisms of fear in vertebrates have involved mammals, but knowledge in other classes of vertebrates is important for a better understanding of the phylogenic continuity ofthis emotion. The aim of the present study was to identify brain areas potentially involved in the control ofbehavioural fear responses in birds, using two lines of quail divergently selected for contrasting fear behaviour. A first investigation using lesions was realised to study the roles of two subdivisions of the arcopallium/ posterior pallial amygdala (PoA) complex, an avian brain region known for its involvement in fear behaviour. The results suggest that the rostral and caudal parts of this brain region play distinct roles in the control of fearbehaviour. In order to identify other avian brain areas potentially involved in the control of fear behaviour, neuralactivation induced by a fear-inducing situation was assessed in the two lines of quail with contrasting fearbehaviour, was then investigated. The expression of Fos protein, a marker of cellular activation, increased inresponse to the fear-inducing situation in the paraventricular hypothalamic nucleus (PVN) in quail displaying exaggerated fear behaviour, suggesting an involvement of the PVN in the control of fear responses in birds. Moreover, this study revealed differences in neural activation between the two lines of quail in basal conditions in the lateral part of the bed nucleus of the stria termanalis (BSTL), the anterior arcopallium and the caudal part of the nucleus taeniae of the amygdala
Bases cellulaires et moléculaires de l'apprentissage et de la mémorisation dans le bulbe olfactif de souris by Germain Busto( )

1 edition published in 2009 in French and held by 1 WorldCat member library worldwide

My research was about cellular and molecular mechanisms implicated in olfactory learning and memory in the adult mouse olfactory bulb (OB). The OB is the first relay of olfactory information in the central nervous system. At this level, phenomenon of local plasticity could be involved in the conservation of a memory trace associated with learning process. First, I evaluated in the granule cell layer, the consequences of an olfactory associative learning on the IEG Zif268 odour-induced expression. Mice with a prior behavioural experience with the odour do not show increase in Zif268 expression. However, the specific odour-induced Zif268 expression pattern is modified by learning. Then, I isolated using laser capture microdissection activated cell populations of the granule cell layer, based on Zif268 expression patterns, after an olfactory associative learning. In those regions, I studied gene expression at a large scale. I found that neurotrophine pathway was modulated during the early phase of learning process whereas molecular actors of LTP are modulated during the consolidation phase. Finally, I showed that Zif268 knock-out mice exhibit associative learning and memory deficits. Those mice also present deficits to discriminate between closely related odorants. Those results indicate that acquisition by odorant of a behavioural meaning during olfactory learning modify odorant processing at the level of OB. Moreover we identified candidate genes that could be implicated in the cellular modifications
Pheromone transport in multiscale pectinate antennae by Mourad Jaffar-Bandjee( )

1 edition published in 2019 in English and held by 1 WorldCat member library worldwide

In many moth species, female adults release tiny amounts of sexual pheromone in order to attract male mates and reproduce. The quantity of released pheromone is around a few dozens of nanograms and male moths can detect it a few hundred meters away from females. As a consequence, they must be able to smell very low concentrations of pheromone. This olfactory function is carried out by the antennae. A critical step in the olfactory process is the capture of molecules from the air. This is a mass transport problem which depends heavily on the shape of the antenna. One of the most spectacular shapes, which occurs in several moth families, is the pectinate antenna. This type of antenna is also thought to be more effective at detecting pheromones than cylindrical-shaped ones. In this work, we investigated whether and how the shape of the pectinate antenna influences its efficiency at capturing pheromone molecules. We focused on one species, Samia cynthia.A pectinate antenna is a complex and multi-scale object. It has a length of 1cm and is composed of one main branch, the flagellum, which carries secondary branches, the rami. Each rami supports numerous hairs, the sensilla, which are 150µm long and have a diameter of only 3µm. Thus, the characteristic dimensions of the antenna span over four orders of magnitude, which makes the study of such objects difficult.To simplify our problem, we decided to split the pectinate antenna in two levels: the macrostructure, composed of the flagellum and the rami, and the microstructure, composed of a rami and the sensilla it bears. Both structures were scaled up and fabricated by Additive Manufacturing. The building of the rami and sensilla, which are long and thin cylinders, was a challenge as we reached the limits of the 3D-printers we used.Pectinate antenna are permeable objects, as are the macro-and microstructures. Thus, air flowing in the direction of such objects either passes through the antenna or is deflected around it. Leakiness if the proportion of flow passing through the permeable object. This parameter is important as it sets an upper limit on the pheromone captured by the antenna: molecules carried by the deflected part of the flow cannot be captured. We experimentally determined the leakiness of the macro- and microstructures at several air velocities encountered by a moth in nature using Particle Image Velocimetry.We then calculated the pheromone capture and efficiency of the microstructure by adapting a model of heat transfer to our mass transport problem. We showed that the longitudinal orientation of the sensilla is sufficient to explain the phenomenon of olfactory lens, stating that the tip of the sensilla captures more molecules than the base. We also found that the efficiency of the antenna is limited by both the leakiness of the antenna, which increases with air velocity, and the local capture, which is the proportion of molecules captured in the part of the airflow passing through the antenna and which decreases with air velocity. Eventually, the microstructure does not have a strong maximum efficiency at a specific air velocity but, instead, is moderately efficient over the large range of air velocity encountered by a moth.We developed a method with the help of FEM simulations to combine the two levels (the macrostructure and the microstructure). This method is based on the relation between drag and leakiness and allowed us to determine the leakiness of the entire antenna. We then could calculate the efficiency of the pectinate antenna and compared it with the one of a cylindrical-shaped one. We found that a pectinate design is a good solution to increase the surface contact between the air and the antenna strongly while maintaining a good capture efficiency at the velocities encountered by the moth
 
moreShow More Titles
fewerShow Fewer Titles
Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.90 (from 0.89 for Éthologie ... to 0.99 for Éthologie ...)

Languages
French (23)

English (7)