References of "Lagardère, Jean-Paul"
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See detailLes sons de contact de l'ombrine côtière - Umbrina cirrosa (Linné, 1758)
Lagardère, Jean-Paul; Parmentier, Eric ULg

in Bulletin de la Société de Borda (2014), 514

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See detailVariations in the sound producing mechanism in the pearlfish Carapini (Carapidae)
Parmentier, Eric ULg; Lagardère, Jean-Paul; Chancerelle, Yannick et al

in Journal of Zoology (2008), 276

Sound production in Carapus boraborensis results from the action of different sonic muscles terminating in complex tendons, which have hooks that fit over a tubercle on the swimbladder wall. The primary ... [more ▼]

Sound production in Carapus boraborensis results from the action of different sonic muscles terminating in complex tendons, which have hooks that fit over a tubercle on the swimbladder wall. The primary sonic muscles (PSM) draw progressively the forepart of the swimbladder until the hook releases the tubercle. This allows the swimbladder to snap back to its resting position, which initiates the onset of the sound. In the present study, the morphology of the C. boraborensis sound-producing apparatus and the resulting sounds were compared with Encheliophis gracilis and Carapus homei. The main difference concerns the direct insertion of the PSM on the swimbladder in C. homei and E. gracilis and, concurrent sonic characteristics. These morphological features also allow both fish to produce an additional kind of sound with more compact pulses, each being clearly composed of two parts and each having a different frequency. The sound producing system could be compared with a guitarist who makes a sound in releasing a guitar string and modulates it by moving his/her finger along the string. However, E. gracilis possess more filtered sounds than C. boraborensis and C. homei, probably because of the unusual shape of its swimbladder. This study highlights the diversity and plasticity of sonic mechanisms and their implication in the development of sonic repertoire in evolving species. [less ▲]

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See detailSound production in two carapids (Carapus acus and C-mourlani) and through the sea cucumber tegument
Parmentier, Eric ULg; Fine, Michael; Vandewalle, Pierre ULg et al

in Acta Zoologica (2006), 87(2), 113-119

Carapus acus and Carapus mourlani are able to live inside sea cucumbers and sea stars respectively. Unlike other carapids whose sounds have been recorded (C. boraborensis, C. homei and Encheliophis ... [more ▼]

Carapus acus and Carapus mourlani are able to live inside sea cucumbers and sea stars respectively. Unlike other carapids whose sounds have been recorded (C. boraborensis, C. homei and Encheliophis gracilis), these two species have a central constriction in their swimbladder and are unlikely to encounter heterospecific carapids within their hosts. We evoked sound production in Carapus acus and Carapus mourlani by adding several individuals to a tank with a single host and found that their sounds differ substantially from the sounds emitted by other carapids in pulse length, peak frequency and sharpness of tuning (Q(3 dB)). Unlike the other carapids, C. mourlani and C. acus produce shorter and less repetitive sounds and do not produce sounds when they enter their host. Since sounds produced within a sea cucumber have the potential to be heard by distant carapids and are typically recorded outside the sea cucumber, we examined the effect of the sea cucumber tegument on acoustic transmission. Attenuation by the tegument was negligible at the frequencies within carapid sounds. Therefore, carapids have the potential to call from the relative safety of a sea cucumber without sacrificing the distance over which their transmissions are heard. [less ▲]

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See detailImpact d'une exposition aiguë au cadmium sur les neuromastes du système latéral troncal et conséquences sur le comportement de fuite "C-Start" du bar (Dicentrarchus labrax L., Téléostéen, Moronidae)
Faucher, Karine ULg; Fichet, Denis; Miramand, Pierre et al

Conference (2006, March)

Les réponses comportementales du bar, Dicentrarchus labrax, ont été examinées après exposition aux ions cadmium en conditions contrôlées de laboratoire. Le but de cette étude était de découvrir si les ... [more ▼]

Les réponses comportementales du bar, Dicentrarchus labrax, ont été examinées après exposition aux ions cadmium en conditions contrôlées de laboratoire. Le but de cette étude était de découvrir si les ions cadmium étaient capables d’inactiver les neuromastes du système latéral du poisson et de déterminer les conséquences comportementales d’un tel blocage sensoriel chez des poissons soumis à des dangers artificiels. Pour cela, le comportement de fuite des poissons en réponse à un jet d’eau artificiel a été enregistré grâce à une caméra vidéo analogique (25 images.s-1) avant et après l’exposition au cadmium. Le protocole expérimental a été testé sur des poissons dont le système latéral avait été artificiellement endommagé par des antibiotiques (gentamicine et streptomycine). Les contrôles histologiques réalisés en microscopie électronique à balayage ont montré que le traitement antibiotique avait détruit les neuromastes du système latéral. En parallèle, ces poissons ne répondaient plus aux stimulations engendrées par le jet d’eau après un tel traitement. Le comportement de fuite des poissons a ensuite été enregistré avant puis après une exposition au cadmium à deux concentrations différentes. Lorsque les bars ont été exposés à la première concentration testée (0.5 µg.l-1, ce qui représente la concentration maximale rencontrée dans des estuaires contaminés), aucune altération des tissus des neuromastes n’a été observée. De plus, avant l’exposition au cadmium, les poissons répondaient de manière positive à 98.41 ± 4.95 % (n = 42) des stimulations de leur système latéral (réponse de fuite face au jet d’eau). Après l’exposition au cadmium, aucune modification comportementale n’a été détectée : les poissons répondaient positivement à 95.16 ± 9.79 % (n = 41) des stimulations ( ² = 2.464, p = 0.116). Au contraire, la concentration la plus élevée de cadmium testée (5 µg.l-1, ce qui représente 10 fois la concentration rencontrée dans les estuaires fortement pollués) a entraîné de sévères dommages au niveau des tissus des neuromastes. Juste après une telle exposition au cadmium, les poissons présentaient seulement 41.67 ± 35.36 % (n = 2) de réponses positives aux stimulations de leur système latéral, alors qu’ils répondaient positivement à 95.93 ± 9.10 % (n = 41) des stimulations en conditions témoins ( ² = 24.562, p < 0.0001). Les neuromastes de leur système latéral ont semblé se régénérer au bout d’environ un mois après l’exposition au cadmium. Associée à cette régénération, à partir du 21ème jour suivant l’exposition au cadmium, leur comportement de fuite s’est restauré et n’était plus significativement différent de celui enregistré en conditions témoins (86.74 ± 20.82 %, n = 11, ² = 2.876, p = 0.090). Cette étude montre que si la concentration de cadmium de 5 µg.l-1 est capable d’endommager les neuromastes du système latéral et de provoquer des altérations comportementales chez les poissons, les bars exposés à 0.5 µg.l-1 de cadmium ne présentent ni dommage tissualaire de leurs neuromastes, ni modification comportementale. [less ▲]

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See detailSound production mechanism in carapid fish: first example with a slow muscle
Parmentier, Eric ULg; Lagardère, Jean-Paul; Vandewalle, Pierre ULg et al

Conference (2006)

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See detailProduction de sons chez les Carapidae: un nouveau type de mécanisme
Parmentier, Eric ULg; Lagardère, Jean-Paul; Braquenier, Jean-Baptiste ULg et al

Conference (2006)

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See detailLe système latéral, organe sensoriel majeur, n'intervient pas dans le comportement alimentaire nocturne du bar
Faucher, Karine ULg; Lagardère, Jean-Paul

in Aquaculture Recherche (2006), 199

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See detailNo efficiency of the lateral system on nocturnal feeding in the European sea bass (Dicentrarchus labrax L.)
Faucher, Karine ULg; Dutto, Gilbert; Covès, Denis et al

in Aquaculture (2006), 252(2-4), 462-475

In order to evaluate the effect and consequence of lateral system inactivation on fish nocturnal feeding, the differential growth of groups of European sea bass maintained in different rearing conditions ... [more ▼]

In order to evaluate the effect and consequence of lateral system inactivation on fish nocturnal feeding, the differential growth of groups of European sea bass maintained in different rearing conditions were compared. Whereas some fish with intact lateral system (placebo fish) were placed under a photoperiod of 12-L: 12-D, other placebo fish were kept in the dark. In the same way, fish deprived of lateral system by section of their lateral system nerves and antibiotic treatment were placed under a photoperiod of 12-L :12-D and the others in the dark. For each of these four rearing conditions, two sets of experiment were realized. Percent mortality, feed rhythm, averaged daily feed demand, specific growth rate and feed efficiency were compared among these four groups of fish. After four months of experiment, results revealed that, under a photoperiod of 12-L: 12-D, fish showed a diurnal feed rhythm whereas no rhythm appeared in fish kept in the dark. In addition, as reported by other authors, the average daily feed demand, the quantity of ingested food and specific growth rate were greater in fish maintained under a photoperiod of 12-L :12-D than those kept in the dark. The fish lateral system inactivation did not affect mortality, feed intake, specific growth rate or feed efficiency. These results demonstrated that lateral system is not the major sensory organ leading to European sea bass nocturnal feeding; chemoreception system undoubtedly taking over. If the olfactory system explains equal feed intake between placebo and treated fish, the greater specific growth rate in treated than in placebo fish indicates the action of another mechanism, such as a "booster effect" of antibiotics used for lateral system inactivation on fish. [less ▲]

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See detailImpact of acute cadmium exposure on the trunk lateral line neuromasts and consequences on the "C-start" response behaviour of the sea bass (Dicentrarchus labrax L.; Teleostei, Moronidae).
Faucher, Karine ULg; Fichet, Denis; Miramand, Pierre et al

in Aquatic Toxicology (2006), 76(3-4), 278-94

Behavioural responses of sea bass Dicentrarchus labrax were investigated after exposure to cadmium ions in laboratory-controlled conditions. The aim of this study was to discover whether environmental ... [more ▼]

Behavioural responses of sea bass Dicentrarchus labrax were investigated after exposure to cadmium ions in laboratory-controlled conditions. The aim of this study was to discover whether environmental exposure to cadmium ions inactivates fish lateral line system neuromasts, and to determine the behavioural consequences of such a sensory blockage. For this, fish escape behaviour in response to an artificial water jet was recorded using a 25-frames s(-1) analog video camera before and after cadmium exposure. Experimental set up was tested with fish whose lateral line system was artificially inactivated by antibiotics (gentamicin and streptomycin). Histological analyses with scanning electron microscopy showed antibiotic treatment destroyed lateral line system neuromasts. In addition, these fish did not respond to stimulations provoked by the water jet after antibiotic treatment. Fish escape behaviour was then recorded before and after cadmium exposure at two different concentrations. When fish were exposed to the first concentration of cadmium tested (0.5 microg l(-1), which represents the maximal cadmium concentration encountered in contaminated estuaries), no alteration in neuromast tissue was observed. In addition, before cadmium exposure, fish responded positively in 98.41 +/- 4.95% of lateral line system stimulations (escape behaviour in response to the water jet). After cadmium exposure, no behavioural modification could be detected: the fish responded positively in 95.16 +/- 9.79% of stimulations (chi(2) = 2.464, p = 0.116). In contrast, the high cadmium concentration used (5 microg l(-1), which represents 10 times the concentration occurring in highly polluted estuarine areas) involved severe neuromast tissue damage. Just after such cadmium exposure, fish showed only 41.67 +/- 35.36% of positive responses to their lateral line system stimulations, while they responded positively in 95.93 +/- 9.10% of stimulations under control conditions (chi(2) = 24.562, p < 0.0001). Their lateral line system neuromasts seemed to regenerate about 1 month after cadmium exposure. Associated with this regeneration, from the 21st day after cadmium exposure, their escape behaviour had recovered and was not significantly different from that recorded under control conditions (86.74 +/- 20.82%, chi(2) = 2.876, p = 0.090). This study shows that although 5 microg l(-1) cadmium is able to damage lateral line system neuromasts and causes fish behavioural alterations, fish exposed to 0.5 microg l(-1) cadmium displayed neither tissue neuromast nor behavioural modification. [less ▲]

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See detailQuantitative aspects of the spatial distribution and morphological characteristics of the sea bass (Dicentrarchus labrax L.; Teleostei, Serranidae) trunk lateral line neuromasts.
Faucher, Karine ULg; Lagardère, Jean-Paul; Aubert, Anne

in Brain, Behavior & Evolution (2005), 65(4), 231-43

The results presented herein report quantitative data relative to the distribution and morphological characteristics of both types of neuromasts encountered on the trunk lateral line of the sea bass ... [more ▼]

The results presented herein report quantitative data relative to the distribution and morphological characteristics of both types of neuromasts encountered on the trunk lateral line of the sea bass (Dicentrarchus labrax, L.). These data were obtained from scanning electron micrographs. They indicate that, as expected, each modified scale of the sea bass possessed a single canal neuromast with long axis oriented parallel to the fish's long axis. In contrast to several fish species, two thirds of superficial neuromasts observed herein were oriented perpendicular to the fish's long axis. However, whatever the main orientation of superficial neuromasts, two thirds of their hair bundles were oriented parallel to the long axis of the animal with approximately half of them in the direction of the head. Similar ratios were observed for canal neuromasts whatever the area of the maculae: central or peripheral. For both types of neuromasts it was not possible to clearly distinguish a paired organization of hair bundles with opposing polarities. Superficial neuromasts on each trunk canal scale were located on either the dorsal or ventral side of the canal and appeared to be distributed along the trunk lateral line with a higher probability to be encountered closer to the operculum. The frequency of presence and the average number of superficial neuromasts per scale increased with fish size. We observed a size gradient for canal neuromasts between the operculum and caudal peduncle. This gradation was correlated with a reduction of the width of the central area of the canal segment. Canal neuromasts were always localized in the larger portions of the canal segments. Taken together, these results point out some specific features associated with the sea bass trunk lateral line. With the previous report, they establish the first full description of the trunk lateral line of sea bass and will be useful for upcoming experiments regarding the function of the two types of neuromasts. [less ▲]

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See detailProduction de sons chez les Carapidae : approche multidisciplinaire
Parmentier, Eric ULg; Gennotte, Vincent ULg; Lagardère, Jean-Paul

Conference (2003)

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See detailSpatial distribution and morphological characteristics of the trunk lateral line neuromasts of the sea bass (Dicentrarchus labrax, L.; Teleostei, Serranidae).
Faucher, Karine ULg; Aubert, Anne; Lagardère, Jean-Paul

in Brain, Behavior & Evolution (2003), 62(4), 223-32

The morphology and spatial distribution of the different types of neuromasts encountered on the trunk lateral line of the sea bass (Dicentrarchus labrax) were examined using scanning electron microscopy ... [more ▼]

The morphology and spatial distribution of the different types of neuromasts encountered on the trunk lateral line of the sea bass (Dicentrarchus labrax) were examined using scanning electron microscopy. The sea bass trunk lateral line exhibits a complete straight pattern. In their basic features, the two types of neuromasts present, canal and superficial, resemble what has been described in other fishes. They are similar in their general cellular organization but differ in sizes, and shapes, as well as in the densities and lengths of their hair bundles. However, the sea bass trunk lateral line distinguishes itself in several ways. For instance, the pores of the canal segments are partially obstructed due to the overlap of scales throughout the trunk. Moreover, based on the density and length of the hair bundles, two distinct areas, central and peripheral, could be distinguished within the maculae of canal neuromasts. Their cupulae are also peculiar as they possess two wing-like extensions and that their central core appears to be organized in layers instead of columns. In addition, the superficial neuromasts, up to 6 per scale, are either round or elliptical and seem to be distributed serendipitously. Finally, within the maculae of both types of neuromasts, a significant number of hair bundles do not follow the two-directional polarity pattern usually described. Although some hypotheses are proposed, the influence of these characteristics in terms of signal encoding and fish behavior is yet to be understood. [less ▲]

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See detailRecordings and mechanisms of sounds in three Carapidae fishes
Parmentier, Eric ULg; Lagardère, Jean-Paul; Wagemans, France et al

Poster (2001)

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