References of "Bussers, Jean-Claude"
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See detailAnalyse fonctionnelle des peuplements bactériens associés aux scléractiniaires
Poulicek, Mathieu ULg; Bussers, Jean-Claude ULg; Vandewalle, Pierre ULg

in Les récifs coralliens. 2ème partie : Aspects biologiques (2000)

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See detailMorphological particularities of the head in four Carapidae (Ophidiiformes)
Parmentier, Eric ULg; Chardon, Michel ULg; Poulicek, Mathieu ULg et al

in Séret, Bernard; Sire, Jean-Yves (Eds.) 5th Indo-Pacific Fish Conference, Noumea - New Caledonia, 3-8 November 1997: Proceedings (1999)

A study of the skull and the musculature of the oral and pharyngeal region of four adult Carapidae species (Encheliophis boraborensis, Encheliophis homei, Encheliophis gracilis and Carapus acus) has ... [more ▼]

A study of the skull and the musculature of the oral and pharyngeal region of four adult Carapidae species (Encheliophis boraborensis, Encheliophis homei, Encheliophis gracilis and Carapus acus) has undertaken to compare it with the diet related characters. The cephalic organization of E. boraborensis and E. gracilis seems related to diet (mainly fishes and shrimps for the first one and holothurian tissues for the other) : these fishes are respectively commensal and parasitic. Although the feeding characters of E. homei and C. acus are closely similar to those of E. boraborensis, there are sparse observations of holothurian tissues in their stomach contents. It is suggested that these fishes are commensal when they are adults and have parasitic tendency when they are juvenile. [less ▲]

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See detailMorphology of the buccal apparatus and related structures in four Carapidae
Parmentier, Eric ULg; Chardon, Michel ULg; Poulicek, Mathieu ULg et al

in Australian Journal of Zoology (1998), 46(3), 391-404

The aims of this study were (1) to compare the morphology of the buccal apparatus, the suspensorium and the opercle in four species of Carapidae (Carapus acus, Encheliophis boraborensis, Encheliophis ... [more ▼]

The aims of this study were (1) to compare the morphology of the buccal apparatus, the suspensorium and the opercle in four species of Carapidae (Carapus acus, Encheliophis boraborensis, Encheliophis homei and Encheliophis gracilis) and (2) to investigate the relationships between their cranial anatomy, their carnivorous diet, and their well known ability to enter holothurians. The complex and strong dentition and the wide hyomandibular with thickenings that seem to suit the constraints of the adductor mandibulae muscles partly inserted on the neurocranium are signs of a carnivorous diet. C. acus, E. boraborensis and E. homei have extremely strong buccal pieces and can protrude their upper jaws. However, in E. gracilis, the jaws are more slender, and the insertions of the A 1 along the entire length of the maxillary associated with the lack of mobility between the maxillary and the premaxillary prevent buccal protrusion. These differences could be related to the diet: C. acus, E. boraborensis and E. homei can feed on fishes and crustaceans, whereas E. gracilis feeds only on holothurian tissue. The cephalic morphology of the four species is not incompatible with entering the host. However, the neutralisation of the suboperculum spine by ‘cartilaginous’ tissue could be considered to be a particular adaptation to this behaviour. [less ▲]

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See detailDistinctive Anatomical Features of the Branchial Basket in four Carapidae Species (Ophidiiformi, Paracanthopterygii)
Vandewalle, Pierre ULg; Parmentier, Eric ULg; Poulicek, Mathieu ULg et al

in European Journal of Morphology (1998), 36(3), 153-164

The present study focuses on the branchial basket in four Carapidae species: Carapus acus , Encheliophis boraborensis , Encheliophis homei and Encheliophis gracilis . The aim is to highlight the skeletal ... [more ▼]

The present study focuses on the branchial basket in four Carapidae species: Carapus acus , Encheliophis boraborensis , Encheliophis homei and Encheliophis gracilis . The aim is to highlight the skeletal and muscular features of the branchial basket, especially those that are believed to be related to their way of life and/or to be linked to the presence of primary sound-producing muscles. The space occupied by the primary sound-producing muscles between the neurocranium and the branchial basket gives rise to distinctive skeletal and muscular features. They prevent the 1st pharyngobranchials from becoming attached to the neurocranium in the normal way. These do not seem to play any role in the suspension of the upper pharyngeal jaws, as it is usually the case in teleosteans. The 1st epibranchials are separated from the 2nd pharyngobranchials. Ossified interarcual elements jointed to the 2nd pharyngobranchials and 1st epibranchials are found in the position usually occupied by the latter. The presence of primary sound-producing muscles gives rise to the need for the reorganisation of the musculature which is seen in particular with regards to the levatores branchiales. These are not found on the neurocranium but on the hyomandibular. The general skeletal and muscular data and the observations of the stomach contents suggest that the action of the branchial basket is restricted to carrying food in Carapus acus , Encheliophis boraborensis and Encheliophis homei , whereas it could also play a role in the work of cutting up soft food in Encheliophis gracilis . [less ▲]

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See detailUltrastructural Localization of Chitin in the Cystic Wall of Euplotes muscicola Kahl (Ciliata, Hypotrichia)
Greco, Ninfa ULg; Bussers, Jean-Claude ULg; Van Daele, Yves et al

in European Journal of Protistology (1990), 26

The ultrastructural localization of chitin in the cyst walls of Euplotes muscicola was determined by labelling with WGA-gold complex.

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See detailOrigine des couches kistiques chez Euplotes muscicola
Greco, N.; Bussers, Jean-Claude ULg; Goffinet, G. et al

in Annales de la Société Royale Zoologique de Belgique (1987), 117(1), 111-123

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See detailChitin production by animals and natural communities in marine environment
Jeuniaux, Charles ULg; Bussers, Jean-Claude ULg; Voss-Foucart, M.F. et al

in Muzzarelli, R.; Jeuniaux, Charles; Gooday, G.W. (Eds.) Chitin in nature and technology (1986)

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See detailLes expansions cuticulaires bordantes, formation nouvelle des décapodes natantia. Données morphologiques et biochimiques chez Palaemon serratus (Pennant, 1877)
Drach, P.; Jacques, F.; Jeuniaux, Charles ULg et al

in Bulletin de la Société Zoologique de France (1982), 107(2), 437-447

In the Decapoda Natantia, transparent cuticular lamellae extend backwards from the tergite and the procurrent lamina ; similar lamellae extend around external and internal cuticles of pleurites ; they ... [more ▼]

In the Decapoda Natantia, transparent cuticular lamellae extend backwards from the tergite and the procurrent lamina ; similar lamellae extend around external and internal cuticles of pleurites ; they make an accute dihedron on the ridge of which there is often a row of denticles. The most specific biochemical reactions demonstrate the presence of chitine in these formations. Linear series of trate the presence of chitine in these formations. Linear series of thin canals are visible : these are the pore canals of the dihedral shaped epithelial cells located between the tergite and the procurrent lamina. These expansions sweep the anterior part of the tergite covered during the extension movement ; this also true for the expansions situated on the posterior border of pleurites during the flexion movements. [less ▲]

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See detailPreliminary results on chitin biomass in some benthic marine biocenoses
Jeuniaux, Charles ULg; Voss-Foucart, M.F.; Bussers, Jean-Claude ULg

Scientific conference (1982)

In an attempt to compare chitin productivity in different biocenoses from an ecological point of view, chitin biomass of some benthic communities was measured on Corsica northwest coasts (Calvi ... [more ▼]

In an attempt to compare chitin productivity in different biocenoses from an ecological point of view, chitin biomass of some benthic communities was measured on Corsica northwest coasts (Calvi, Mediterranean Sea). In the infralittoral communities of photophilous algae characterized by Cystoseira stricta or C. crinita, the chitin biomass (excluding Decapod Crustaceans) was found relatively constant and amounted from 300 to 1100 mg chitin. m-2 (average 717 mg chitine. m-2 +/- 280) mainly due to exoskeletons of epiphytic encrusting organisms, such as bryozoans. Chitin biomass of Decapod Crustaceans was far more variable. Sciaphilous communities of semi-darked caves, dominated by sponges, had a lower chitin biomass, amounted from 130 to 370 mg chitin.m-2 (average 268 mg.m-2 +/- 106). Depth, from 5 to 35 meters, and slope did not seem to affect chitin biomass values. [less ▲]

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See detailEtude comparée de la composition chimique des régions souples et durcies de la cuticule de quatre espèces de siponculiens
Voss-Foucart, M.F.; Barzin, S.; Jeuniaux, Charles ULg et al

in Teissier, Gearges (Ed.) Cahiers de biologie marine : tome XVIII (1977)

Comparative study of the chemical composition of flexible and hard parts of the cuticle of Sipunculids was realized on four species : Aspidosiphon clavatus Diesing, Golfingia vulgaris (de Blainville ... [more ▼]

Comparative study of the chemical composition of flexible and hard parts of the cuticle of Sipunculids was realized on four species : Aspidosiphon clavatus Diesing, Golfingia vulgaris (de Blainville), Phascolion strombi (Montagu) and Sipunculus nudus L. The histochemistry confirmed that collagen takes part in the composition of the cuticle in all the species studied. Non protidic cuticular material consisted of neutral mucopolysaccharides, associated with acid mucopolysaccharides in the papillae of the introvert of S. nudus. Histological and histochemical differences between hard and flexible parts of the cuticle of the body of G. vulgaris were not observed. In Aspidosiphon clavatus, a peculiar protidic material, detected by amino acid chromatography after acid hydrolysis, could play a role in the hardening of the shields, this hardening being possibly increased by carbonate deposits. Using a specific enzymatic method, it was shown that chitin was lacking in the species with locally hardened cuticle as in those with flexible cuticle. [less ▲]

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See detailContribution à l'inventaire de la faune marine des fonds de la région de Calvi (Corse)
Bussers, Jean-Claude ULg; Arnould, Ch.; Chardon, Michel ULg et al

in Bulletin de la Société Royale des Sciences de Liège (1976), 45(3-4), 123-135

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See detailRecherche de la chitine dans les productions métaplasmatiques de quelques ciliés
Bussers, Jean-Claude ULg; Jeuniaux, Charles ULg

in Protistologica (1974), 10(1), 43-46

The presence of Chitin has been searched in the metaplasmatic productions (cysts, loricas, shells) of 22 species of Ciliata, using a specific micromethod involving a powerful preparation of purified ... [more ▼]

The presence of Chitin has been searched in the metaplasmatic productions (cysts, loricas, shells) of 22 species of Ciliata, using a specific micromethod involving a powerful preparation of purified chitinase of microbial origin. Among these 22 species sofar studied, 14 are able to produce chitinous structures. The biosynthesis of chitin thus appears as a general property of the Class Ciliata. [less ▲]

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See detailStructure et composition de la cuticule de macrobiotus Sp. et de milnesium tardigradum
Bussers, Jean-Claude ULg; Jeuniaux, Charles ULg

in Annales de la Société Royale Zoologique de Belgique (1973), 103(2-3), 271-279

The structure and the composition of the cuticule of the Tardigrada Macrobiotus sp. and Milnesium tardigradum are studied. The cuticle is always made of two distinct layers extending to the stomodeum. By ... [more ▼]

The structure and the composition of the cuticule of the Tardigrada Macrobiotus sp. and Milnesium tardigradum are studied. The cuticle is always made of two distinct layers extending to the stomodeum. By the two species, the cuticle contents, besides chitin, acid mucopolysaccharides and protids. These facts are arguments to bring nearer Tardigrades and Arthropods. [less ▲]

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See detailComposition chimique de la theque de quelques thecamoebiens (protozoaires)
Saucin-Meulenberg, M.; Bussers, Jean-Claude ULg; Jeuniaux, Charles ULg

in Bulletin Biologique de la France et de la Belgique (1973), 107

The thecae of 7 species of Thecamoeba, belonging to 3 different families (Arcellidae, Plagiopyxidae, Difflugiidae) have been submitted to some chemical tests. In one species of Arcella, the theca was not ... [more ▼]

The thecae of 7 species of Thecamoeba, belonging to 3 different families (Arcellidae, Plagiopyxidae, Difflugiidae) have been submitted to some chemical tests. In one species of Arcella, the theca was not mineralized ; the inorganic constituents of the thecae of the 6 other species hawe been identified as SiO2. In 4 species, the silica flakes were protected by an organic cover, which explains the resistance offered by the thecae to fluorhydric acid. In the 7 species so far studied, the organic cement was found to be proteic in nature, and to be devoid of chitin or cellulose. [less ▲]

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See detailChitinous Cuticle and Systematic Position of Tardigrada
Bussers, Jean-Claude ULg; Jeuniaux, Charles ULg

in Biochemical systematics (1973), 1

The chitinous nature of the cuticle, jaws and stomodaeum of three species of Tardigrada has been definitely proven using a specific micromethod involving a preparation of purified chitinase. These ... [more ▼]

The chitinous nature of the cuticle, jaws and stomodaeum of three species of Tardigrada has been definitely proven using a specific micromethod involving a preparation of purified chitinase. These chemical characteristics are in favour of the phylogenetic closeness between Tardigrada and the Arthropoda. [less ▲]

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See detailRecherches préliminaires sur la présence de chitine dans les kystes de quelques Ciliés
Bussers, Jean-Claude ULg; Jeuniaux, Charles ULg

in The Journal of Protozoology (1970), 17(supplément), 119

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