Recherche documentaire
Trier par :
-
Heral, Maurice / Deslous-paoli, Jean-marc / Prou, Jean - 1986The evolution of the production of cupped oysters is estimated on a century (1885-1985) with three different sources of data. The total biomass in culture is calculated from productions by knowing regularly the growing rate and the mortality rate of the populations of oysters. It appears that the...Contributeur (s):
-
Heral, Maurice - 1980Rapport annuel d'activité du Laboratoire Cultures Marines et Aménagement du Littoral de La Tremblade concernant l'année 1980Contributeur (s):
-
Thomas, Gerard / Kantin, Roger / Heral, Maurice - 1999A coastal river 380 km long, the Charente river has a catchment area of about 10,000 km2, flowing through the departments of Charente and Charente-Maritime, as well as a small part of the border departments: Dordogne, Deux-Sèvres, Haute-Vienne and Vienne. Its main affluents are the Tardoire, the...Contributeur (s):
-
Heral, Maurice / Alzieu, Claude / Caux, O. / Razet, Daniel / Garnier, Jacqueline - 1983The toxicity of organostannic compounds has been demonstrated for the oyster Crassostrea gigas through larval (His & Robert, 1980) and adult stages (Alzieu & al., 1980, 1981). In parallel, these authors demonstrated the accumulation of tin in experimentally contaminated oysters as well as...Contributeur (s):
-
Goulletquer, Philippe / Prou, Jean / Heral, Maurice - 1985Following the development of net protection techniques (1980), Japanese clam Ruditapes philippinarum farms develop in the ponds of Charente-Maritime. The county production for 1984 is about 100 tonnes, for a turnover of 4.5 Million Francs. To this day, farmers cultivating clams in ponds over a full...Contributeur (s):
-
Ecophysiological study was conducted on the japanese oyster (Crassostrea gigas) reared in Marennes-Oléron bay (France), during May 1992. Most of the somatic growth of the oyster occured during that month. The measurements were achieved from a removable laboratory stated in Le Chapus for 3 days at...Contributeur (s):
-
Heral, Maurice / Woerhling, Daniel - 1976Some adenosine triphosphate measurements enabled us to quantify the planktonic mortality caused by the transfer of cooling waters in the condensers of the thermic plant of Dunkerque. Concerning phytoplankton, the chlorine used as a biocide causes a loss of 70 to 95 % of the absorbed biomass. An ATP...Contributeur (s):
-
Heral, Maurice / Zanette, Yvan / Deslous-paoli, Jean-marc / Robert, Jean-michel / Razet, Daniel - 1981In 1979 and 1980, the characteristics of the particulate organic matter are defined fortnightly through seston analyses. It is very high in the basin and very low in the finishing ponds. The phytoplanktonic biomasses are maximal in May in the estuary, and in June-July in the finishing ponds, with...Contributeur (s):
-
Soletchnik, Patrick / Heral, Maurice / Razet, Daniel / Geairon, Philippe - 1992Dans le cadre des études de physiologie, la fonction de filtration intervient dans le calcul du bilan énergétique, ou permet de déterminer la quantité d'aliment consommé par les mollusques filtreurs. Cette fonction peut également être considérée dans les relations avec le poids de l'...Contributeur (s):
-
Gruet, Yves / Heral, Maurice / Robert, Jean-marie - 1976The intentional establishment of the Japanese oyster Crassostrea gigas (Thunberg) in replacement of the Portuguese oyster caused numerous biological problems. The possible introduction of some Turbellariae, oyster predators, was at the origin of the regulation concerning the "stay in...Contributeur (s):
-
Heral, Maurice / Deslous-paoli, Jean-marc / Garnier, Jacqueline / Prioul, Daniel / Heurtebise, Serge / Razet, Daniel - 1982Different types of pregrowth of the Japanese palourde are compared on the some site. The method by upwelling which is the more common used, to have good growth, requires a compromise between the running and the raised biomass. Two periods are critical, in the summer the growth of mollusks is...Contributeur (s):
-
Bougrier, Serge / Heral, Maurice / Hawkins, Andrew / Bayne, Barry - 1997Using flow cytometry techniques, it is possible to study both the potential impact of filter-feeder bivalves on microalgal communities as well as the changes in the grazed microalgae and the behaviour of these bivalves whose diet is composed of a mixture of different species.Contributeur (s):
-
Heral, Maurice - 1991The different methods of estimating the trophic capacity of ecosystems cultivated by oyster farming and mussel farming are introduced by ascending order of complexity. Thus, production yields make it possible to monitor whether the size of the farmed stock is being successfully matched with the...Contributeur (s):
-
Heral, Maurice - 1989Contributeur (s):
-
Deslous-paoli, Jean-marc / Zanette, Yvan / Heral, Maurice / Masse, Henri / Garnier, Jacqueline - 1981The breeding of Pacific oysters Crassostra gigas, in non tidal ponds, before commercialization, brings about an improvement of the shell and of the quantity and quality of the tissues. In fact, the Berthome's indice (1978) moves from 1.36 in June to 0.68 December, and the density of the shell...Contributeur (s):