|
|
|
| Registros recuperados: 148 | |
|
|
| Heral, Maurice; Lassus, Patrick; Halguand, D.. |
| Le navire océanographique "Thalassa" a effectué du 15 janvier au 14 février 1975 une série de prélèvements et de mesures, dans le secteur côtier compris entre le cap d'Antifer et Dunkerque. La mission embarquée comprenait les chercheurs et techniciens de l'ISTPM, ainsi qu'un représentant d'EDF pendant la première semaine de campagne. Ces travaux avaient pour but essentiel d'apporter des informations préliminaires à des études biologiques et écologiques destinées à évaluer l'impact de futures centrales thermiques nucléaires sur l'environnement marin de la Manche orientale et du sud de la Mer du Nord. |
| Tipo: Text |
|
| Ano: 1975 |
URL: http://archimer.ifremer.fr/doc/00046/15728/13130.pdf |
| |
|
|
| Heral, Maurice. |
| Le filet Bongo est un filet à plancton américain dont l'utilisation se généralise pour les études de l'lchtyoplancton. Ses dimensions, son pouvoir de filtration et son rendement en fait un engin performant pour la recherche des larves de poissons. Il est recommandé par l'I.G.N.A.F. groupe pré-recrutement du hareng et il le sera prochainement dans F.A.O. standard Techniques for Pelagic Fish Egg and Larva Sarveys. L' ISTPM utilise ce filet, depuis 1971 , dans de nombreuses campagnes à bord de la Thallassa, du Cryos, de la Pelagia , du Roselys et de Ichtys. En 1975, nous avons décidé d'utiliser ce filet dans des études côtières que l'ISTPM mène en Manohe et en Mer du Nord. Ces travaux ont pour but d'établir un inventaire halieutique qualitatif et quantitatif... |
| Tipo: Text |
|
| Ano: 1975 |
URL: http://archimer.ifremer.fr/doc/00387/49875/50433.pdf |
| |
|
|
| Gruet, Yves; Heral, Maurice; Robert, Jean-marie. |
| The 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 freshwater" of the spat. The implantation of other microorganisms drew our attention. Our results, though fragmentary, show that some Japanese species live on our coasts (Bay of Bourgneuf and Traiet du Croisic) a year after the immersion of the original collectors: Annelida Hydroides ezoensis, Cnidarian Aiptasia pulchella, Mollusc Anomia chinensis, Cirripedes Balanus amphitrite amphitrite and Balanus albicostatus. The survival chances seem to vary according to the oyster... |
| Tipo: Text |
|
| Ano: 1976 |
URL: http://archimer.ifremer.fr/doc/1976/publication-4927.PDF |
| |
|
|
| Heral, Maurice. |
| Some 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 extraction method has been developed for zooplankton in order to monitor the evolution of live planktont. Results show that losses are low, if not null and that some species seem to proliferate right next to the discharge. Another approach of fish larva mortality rate, through counting on the aspiration grids seems to prove it very high. |
| Tipo: Text |
Palavras-chave: Rejet; Centrale thermique; Mortalité planctonique; Dosages adénosine triphosphate. |
| Ano: 1976 |
URL: https://archimer.ifremer.fr/doc/1976/acte-6215.PDF |
| |
|
| |
|
|
| Heral, Maurice; Berthome, Jean-paul; Razet, Daniel; Garnier, Jacqueline. |
| Consequences of drought and canicule during the summer of 1976 are related. An analysis allow as to mark out five main districts : Charente, Seudre, North, South and Center of the bassin, each of them with distinctive hydrological and phytoplaktonic characteristics. The rivers Charente and Seudre are particulary eutrophic and any great quantities of nitrates, phosphates and silicates. Eutrophic evaluation of the river Seudre is studied, as well as oyster mortalities that resulted. Reproduction and settlement of spat oysters are related to the hydrology of each distric. |
| Tipo: Text |
Palavras-chave: Ostréiculture; Impact; Sécheresse; Bassin Marennes Oléron; Canicule. |
| Ano: 1977 |
URL: http://archimer.ifremer.fr/doc/1977/acte-2994.pdf |
| |
|
| |
|
| |
|
|
| Heral, Maurice; Woehrling, Daniel; Halgand, Daniel; Lassus, Patrick. |
| The "Bongo" net is an American plankton net whose use is coming into general use for studies of ichthyoplankton. Its dimensions and its power of filtration make it an efficient device for researching groups with unevenly spaced micro distribution as well as rare species, especially fish eggs and larvae. It is recommended by the ICNAF (Standard Techniques for Pelagic Fish Eggs and Larvae Surveys) and will soon be recommended by the FAO. The ISTPM, for its part, has been using this net for some years in several campaigns conducted by the Thalassa, the Cryos, La Pélagia, the Roselys and the Ichthys (ISTPM 1971, 1975, ALDEBERT 1975, ARBAULT and LACROIX 1975). In 1975, we decided to use this net in some studies in coastal waters that the ISTPM is conducting in... |
| Tipo: Text |
Palavras-chave: Traitement échantillon; Profondeur immersion; Pêche; Echantillonneur; Filet à plancton. |
| Ano: 1979 |
URL: http://archimer.ifremer.fr/doc/1979/acte-2991.pdf |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Heral, Maurice; Razet, Daniel; Maestrini, Serge; Garnier, Jacqueline. |
| A twice monthly study shows that the major amount of organic material is from detrtic origin, and is brought in winter, when valeus of mineral seston are very high. In the sping time, phytoplancton blooms, do not make up for lack of detritic material where as in the summer, oceanic phytoplancton is composed of important amounts of carbohydrates. Available food is defined as sum of protids, lipids and carbohydrates and mesured in energetic therms. This allows to foretell the amount of food that molluscs ar likely to assimilate. |
| Tipo: Text |
Palavras-chave: Marennes Oléron; Nutrition; Matière organique; Crassostrea gigas; Huîtres. |
| Ano: 1980 |
URL: http://archimer.ifremer.fr/doc/1980/acte-3003.pdf |
| |
|
|
| Heral, Maurice; Feuillet, Michèle; Razet, Daniel. |
| Les dosages du calcium dissous dans l'eau du bassin de Marennes-Oléron ont mis en évidence un déficit calcique supérieur à 30% en hiver. En mai, période de forte pousse de la coquille de l'huître, on a constaté en certain secteur du bassin que 70% du calcium est consommé. Le dosage du calcium s'est de plus révélé très utile pour dégrossir les problèmes de malformations de coquilles et pour les relier avec les défauts de calcifications et avec l'apparition de poches gélatineuses. C'est pour ces raisons que nous avons étudiés les différentes méthodes de dosages du calcium et organisé une intercalibration. |
| Tipo: Text |
|
| Ano: 1980 |
URL: http://archimer.ifremer.fr/doc/00388/49886/50447.pdf |
| |
|
| |
|
| |
|
| |
|
|
| Deslous-paoli, Jean-marc; Zanette, Yvan; Heral, Maurice; Masse, Henri; Garnier, Jacqueline. |
| The 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 increases in the same time from 1.79 to 1.98. On the other hand, the percentage of tissues in the oyster is 12.4% at the end of gametogenesis and more than 9% at the end of breeding. The dry tissues are composed of 10.3 of ash, 40.3% of proteins, 12.6% of lipids and 9% of carbohydrate. 95% of the carbohydrate are glycogen. The resulting energetic values are measured to 5.10 cal-mg super(-1) of dry tissues ash free. |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Tissues; Biochemical composition; Shells; Growth; Oyster culture. |
| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/1981/publication-1892.pdf |
| |
| Registros recuperados: 148 | |
|
|
|
