LES SPONGIAIRES COURS PDF

uCLOuvaiN FDP Zoologie FDp ZOOLOgiE – Les Spongiaires 2 2. Exemple-type Cours sur les spongiaires – erso. BIOLOGIE Sujet. PDF | Two new spongiofaunas from the Oran area take their place among the Miocene sponge association of the West-Mediterranean border. The first belongs . L’oviparté chez les spongiaires. C. R. Acad. Sci. Paris , Lévi, C. ( b). Existence d’un stade grégaire transitoire au cours de l’ovogénèse des.

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Surface water is withdrawn from rivers for various industrial uses ; among these, power production accounts for a large proportion. Many aquatic species settle in the raw water circuits of power plants, disrupting their operation and occasionally putting the whole plants out of use.

In certain cases, the arrival of new species raises a serious problem for the industry. The ecological impact of the zebra mussel in North America has been widely studied and is thought to be considerable during the phase of rapid spreading of the species.

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In Europe as well, the zebra mussel constitutes a threat for industrial circuits. Two new invasive species have recently appeared in Spongiairs rivers: Corophium curvispinum, thus adding to the list of organisms sponges, hydroids, bryozoans, molluscs previously found in power plant circuits on French rivers.

To ensure the availability of plant circuits, it is essential to ocurs able to control the development of these species. This, in turn, implies in-depth knowledge of them in both biological and ecological terms. This paper presents a brief overview of present industrial methods, or methods now under study, for checking the spread of such organisms.

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