Description d'une suceuse à air comprimé économique et utilisable par un seul plongeur = Description of a sucking-pipe sampler

A new type of sucking pipe sampler is described, using a scuba diving-tank for air-lift. A series of samplings may be performed by one single diver during one single diving

Morphological particularities of the head in four Carapidae (Ophidiiformes)

A study of the skull and the musculature of the oral and pharyngeal region of four adult Carapidae species (Encheliophis boraboreruis, E. homei. E. gracilis and Carapus acus) has been 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 species 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 juveniles

Morphology of the <i>Buccal apparatus</i> and related structures in four species of Carapidae

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 Al 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

Etude quantitative préléminaire de la composition chimique des communautés pionnières colonisant divers types de plastiques en Méditerrannée

Etude des peuplements pionniers colonisant des substrats vierges, notamment en plastique, en Méditerranée

The Seascape as an Indicator of Environmental Interest and Quality of the Mediterranean Benthos: The in Situ Development of a Description Index: The LIMA

peer reviewedThe LIMA index conveys the environmental interest and quality of the landscape formed by the Mediterranean benthos, ranging from 0 to − 40 m, in numerical format. The LIMA index allows a comparison spatially and temporarily between sites. It is a comprehensive index which is easy to implement and is composed of two factors: a topographical description (classification of 15 typologies) and a biological description (the presence or absence of some thirty species or groups of structuring, remarkable and invasive species). The LIMA index has been validated in he Bay of Calvi (Corsica-France) where it varies between 0.31 and 0.79 on a scale of 0.00–1.00

Surveillance écologique de la Meuse en aval du site de Tihange

Le but de ce travail était de fournir aux autorités responsables (Ministère de la région Wallonne) les éléments qui leur permettront d'apprécier de manière rationnelle les normes de rejets (non radioactifs) à imposer à la centrale nucléaire de Tihange. Dans ce but, i) un suivi intensif de la qualité de l'eau aux alentours de la centrale a été réalisé pendant l'année 1984; ii) un modèle de la qualité physico-chimique de l'eau de la Meuse a été construit; iii) ce modèle a permi de simuler les effets du fonctionnement de la centrale de Tihang