Biomaterial Database

[Ecology of Lymnaea truncatula Müller, intermediate host of Fasciola hepatica Linné in the microclimate of Tozeur (southeast of Tunisia)]. 1999

H Hammami, and A Ayadi

Laboratoire de parasitologie-mycologie, Faculté de Médecine de Sfax, Tunisie.

Systematic visits were carried out in the traditional Tozeur' oasis (Tunisia), in 1997/1998 in order to study the ecology of Lymnaea truncatula as well as its density in relation to habitat characteristics in the hydrographical networks of the oases. Lymnaea truncatula was enumerated on 1 m2 surface by habitat, according to the quadrat method. Samples of soil, irrigation and draining water were also analysed. The density of Lymnaea truncatula detected in autumn was constantly higher. It depends on the nature of the habitat: 54.8% in the secondary irrigation canals, 34.8% in those of draining, 7.6% in the seguia and 2.9% in the principal draining canal. Ecological factors--permanent dampness, suitable luminosity, basic pH of soil and water, temperature between 10 and 28 degrees C--contribute to the multiplicity of snails.

UI	MeSH Term	Description	Entries
D008195	Lymnaea	A genus of dextrally coiled freshwater snails that includes some species of importance as intermediate hosts of parasitic flukes.	Lymnea,Lymnaeas,Lymneas
D002980	Climate	The longterm manifestations of WEATHER. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Climates
D004463	Ecology	The branch of science concerned with the interrelationship of organisms and their ENVIRONMENT, especially as manifested by natural cycles and rhythms, community development and structure, interactions between different kinds of organisms, geographic distributions, and population alterations. (Webster's, 3d ed)	Bionomics,Ecologies
D005210	Fasciola hepatica	A species of helminth commonly called the sheep liver fluke. It occurs in the biliary passages, liver, and gallbladder during various stages of development. Snails and aquatic vegetation are the intermediate hosts. Occasionally seen in man, it is most common in sheep and cattle.	Liver Fluke,Fasciola hepaticas,Fluke, Liver,Flukes, Liver,Liver Flukes,hepatica, Fasciola
D006863	Hydrogen-Ion Concentration	The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH	pH,Concentration, Hydrogen-Ion,Concentrations, Hydrogen-Ion,Hydrogen Ion Concentration,Hydrogen-Ion Concentrations
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012987	Soil	The unconsolidated mineral or organic matter on the surface of the earth that serves as a natural medium for the growth of land plants.	Peat,Humus,Soils
D013696	Temperature	The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.	Temperatures
D014416	Tunisia	A country in northern Africa between ALGERIA and LIBYA. Its capital is Tunis.
D014867	Water	A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	Hydrogen Oxide