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Registros recuperados: 225
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Mortalités estivales de l'huître creuse (Crassostrea gigas) dans le bassin de Marennes-Oléron (France). Etude de la variabilité spataile des caractéristiques environnementales de croissance et de production par un Système d'Informations Géographiques (GIS) ArchiMer
Soletchnik, Patrick; Le Moine, Olivier; Razet, Daniel; Geairon, Philippe; Faury, Nicole; Goulletquer, Philippe; Robert, Stephane.
The Marennes-Oléron Bay is the first cupped oyster production site (35,000 tons/year). For more than 10 years, this species has suffered chronic mortality episodes. A research program has been developed since 1994 in association with the professional sector, in order to try and explain these mortalities.
Tipo: Text Palavras-chave: Production; Croissance; Modélisation; GIS; Système d'Informations Géographique; Crassostrea gigas; Huîtres; Mortalités estivales.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/acte-3377.pdf
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Croissance et qualité de l'huître Crassostrea gigas Thunberg en élevage dans le bassin de Marennes-Oléron ArchiMer
Deslous-paoli, Jean-marc.
In 1979-1980, the main growth o oysters Crassostrea gigas, in the basin of Marennes-Oleron occured in June and July. The available amount of food and the energetic requirements for the reproduction are important factors determining growth. Tissue weight decreased after spawning until the end of the winter, and this decrease might be related to the high quantities of inorganic particles, in the seston, at that period of the year.
Tipo: Text Palavras-chave: Marennes Oleron; Seston; Growth; Crassostrea gigas; Oysters; Marennes Oléron; Seston minéral; Croissance; Crassostrea gigas; Huîtres.
Ano: 1982 URL: http://archimer.ifremer.fr/doc/1982/publication-2947.pdf
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Aspects biométriques et biochimiques de la croissance de l'huître Crassostrea virginica en élevage suspendu à Solomons (Baie de Chesapeake) ArchiMer
Goulletquer, Philippe; Prou, Jean; Heral, Maurice.
Growth and proximate biochemical composition of the American oyster Crassostrea virginica were studied in the Patuxent river (Maryland), located in the middle reach of the Chesapeake bay (U.S.A.). The effects of stocking densities and environmental variables (depth, temperature) were examined in 1989-1990 on oyster population by using off-bottom culture. No significant density effect was observed on the shell growth, which is described by using a seasonally oscillating function. In contrast, the meat growth and the proximate biochemical composition were bath affected by the stacking density and the depth location. The variability of the resulting effects was observed based on a seasonal trend. Different hypothesis mainly related tO environmental conditions...
Tipo: Text Palavras-chave: USA; Chesapeake Bay; Oysters; Growth; Biochemical composition; Crassostrea virginica; Croissance; USA; Chesapeake Bay; Huîtres; Biochimie; Biométrie; Crassotrea virginica.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/publication-3076.pdf
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Le satellite en soutien à la conchyliculture ArchiMer
Le Moine, Olivier; Gohin, Francis.
La surveillance de la qualité des eaux littorales assurée par l'IFREMER s'est enrichie de données satellitaires. L'IFREMER a développé un algorithme de traitement de ces données permettant l'évaluation de la richesse phytoplanctonique des eaux et leur cartographie. Les données sources sont les données de réflectance du satellite MODIS (Goddard Space Center, NASA). Le réseau REPHY de surveillance de la flore vient conforter ces résultats. Ces estimations aident à la compréhension de l'écosystème, et à l'explication des croissances et rendements des bivalves en élevage, mission des Laboratoires Environnement Ressource de l'IFREMER.
Tipo: Text Palavras-chave: Bivalves; Croissance; Phytoplancton; Traitement données; Satellite; Conchyliculture.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/acte-4083.pdf
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Contribution à l'étude de la crevette rose Palaemon serratus (Pennant) : Exploitation, Biologie, Elevage, Epidémiologie ArchiMer
Campillo, Albert.
This these is the result of several years of investigations conducted on the common prawn Palaemon serratus in the Roscoff (northern Brittany) and Yeu (bay of Biscay) sectors of the French Atlantic coast. Following a description of the fishery and fishing strategies, it deals with the species biological aspects, focusing on growth, lifespan, sex-ratio and breeding. Hypotheses on the reasons for apparent variations in interannual abundance are drawn up and compared with field observations. The second part is devoted to production experiments in a controlled environment (hatchery), explaining how larvae are obtained and their development and survival with respect to food, density and physical parameters like salinity and temperature. The link between...
Tipo: Text Palavras-chave: Shrimp farm; Larval development; Sex ratio; Breeding; Growth; Fishery; Palaemon serratus; Common prawn; Elevage; Développement larvaire; Sex ratio; Reproduction; Croissance; Pêche; Palaemon serratus; Crevette rose.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/1979/these-1196.pdf
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Estimation des stocks d'huîtres cultivées dans le bassin de Marennes-Oléron en 1986 ArchiMer
Bodoy, Alain; Bacher, Cedric; Geairon, Philippe.
Une estimation du stock d' huîtres creuses en élevage dans le bassin de Marennes-Oléron a été effectuée en août 1986 . Le stock s'élevait alors à 90 000 tonnes, avec une précision de 8,4 %. Ce stock se répartit en 30 300 tonnes pour l'élevage à plat et 59 700 tonnes pour l'élevage en surélevé. Il s'est donc produit une augmentation des tonnages en élevage qui est de 9,4 % entre 1985 et 1986. L'augmentation de tonnage concerne surtout l 'élevage en surélevé, et plus particulièrement les huîtres fixées sur collecteurs. La séparation des classes d'âge au niveau des collecteurs a permis d'améliorer la précision des estimations. Elle a également permis de montrer l'importance de la classe d'âge de 1 an (16 900 tonnes), qui correspond au captage particulièrement...
Tipo: Text Palavras-chave: Ostréiculture; Stocks; Croissance; Production; Huîtres creuses.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/00048/15903/13331.pdf
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Déclin de la taille-aux-âges des sardines (Sardina pilchardus) : diminution de la croissance et/ou disparition sélective des individus à croissance rapide ArchiMer
Gentil, Claire.
In many exploited species, we see a decrease of size-at-ages. Two main hypotheses have been proposed to explain this decline: a decline in growth and the selective mortality of the individuals with fast growth both being due to environmental changes or/and to fishing. The sardine Sardina pilchardus of the Bay of Biscay is a good model for the study of this phenomenon because of its high sensitivity to the environmental variations and it sustains two large French and Spanish fisheries. The aim of this study is to measure the changes in the growth of sardines, by the reading of otoliths, and to understand mechanisms involved in this process. The main stages of this study are described in this report: extraction of otoliths during PELGAS, otoliths...
Tipo: Text Palavras-chave: Sardina pilchardus; Golfe de Gascogne; Otolithes; Croissance; Mortalité; Sélection; Sardina pilchardus; Bay of Biscay; Otoliths; Growth; Mortality; Selection.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00459/57038/58942.pdf
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Incidences de l'Amoco Cadiz sur les exploitations ostréicoles ArchiMer
Grizel, Henri; Michel, Pierre; Abarnou, Alain; Guegan, B..
Oyster contamination present on Oyster-beds in Abers-Morlaix bay when stranding arrives, decontamination of this oysters in others clean rivers an clean oyster stocks in oyster-beds, submersible and insubmersible thanks in pollute rivers are described. Pratical implication of this result in given.
Tipo: Text Palavras-chave: Amoco Cadiz; Croissance; Mortalités; Décontamination; Marée noire; Contamination; Pollution; Huîtres.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/1979/acte-6247.PDF
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Mortalité de l'huître creuse C. gigas dans le Bassin de Marennes-Oléron. Résultats obtenus sur le site atelier de Ronce-Perquis en 1997-1998 ArchiMer
Soletchnik, Patrick; Le Moine, Olivier; Faury, Nicole; Razet, Daniel; Geairon, Philippe; Robert, Stephane; Goulletquer, Philippe.
The cupped oyster, Crassostrea gigas was first introduced in France in 1967 [13]. On the Atlantic coast, the Marennes Oléron Bay (Figure 1) is the first European oyster culture basin with a cupped oyster (Crassostrea gigas) stock of 110,000 tons and an annual output of 30,000 to 40,000 tons. The Ronce oyster bank, located at the south of the bay (Figure 1), is made of 1,600 concessions spread out over 175 ha. It produces 8,000 to 10,000 tons of cupped oysters each year. In Japan, Crassostrea gigas has been cultivated for more than 1,000 years (Farley, 1992). Since the beginning of the 1960's, oyster mortality has multiplied throughout the world (Imaï et al., 1965; Sinderman, 1976; Mackin, 1961; Beattie et al, 1980). In the 60's and 70's, Japan and the west...
Tipo: Text Palavras-chave: Crassostrea gigas; Physiologie; Pontes; Maturation; Croissance; Marennes Oléron; Huîtres; Mortalités.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/rapport-3380.pdf
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Essai de culture suspendue de la Coquille Saint Jacques Pecten maximus: influence de la transplantation sur le développement gonadique ArchiMer
Latrouite, Daniel; Claude, Serge.
La mise au point et le développement de techniques de captage en milieu naturel et de production en milieu contrôlé permettent d'envisager pour la coquille Saint Jacques une aquaculture extensive du type de celle réalisée pour l'huître sur parc non découvrant : un ou plusieurs centres favorables à la collecte du naissain pourvoient en juvéniles des secteurs propices à l'élevage. Une plus value marchande peut être obtenue lorsque le changement de milieu s'accompagne de modifications physiologique ou organoleptiques. Ainsi, la présence de la glande génitale développée (ou corail) est particulièrement appréciée du consommateur français. Cet état s'observe tout au long de l'année sur les gisements de Bretagne Sud et de Rade de Brest alors qu'en Baie de Saint...
Tipo: Text Palavras-chave: Conchyliculture; Coquille Saint Jacques; Captage; Croissance; Mortalité; Elevage.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00015/12660/9531.pdf
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Dinophysis acuminate (dinophyceae), une espèce à géométrie variable sur les côtes françaises ArchiMer
Lassus, Patrick; Marcaillou-le Baut, Claire.
Tipo: Text Palavras-chave: Morphologie; Variabilité; Ultrastructure; Croissance; France; Dinophysis acuminata; Europe; Milieu marin; Zone côtière; Phytoplancton; Pyrrophycophyta; Algae; Thallophyta; Morphology; Variability; Ultrastructure; Growth; France; Europe; Marine environment; Coastal zone; Phytoplankton; Pyrrophycophyta; Algae; Thallophyta.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00133/24468/22484.pdf
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Evolution du phytoplancton dans des bassins de culture ArchiMer
Nival, Paul; Malara, G.; Lelong, P.; Cellario, C.; Charra, R.; Riva, A..
The concentration of chlorophyll a in large out-door continuous cul­ture was analysed in spring 1977 and 1978, and autumn - winter 1977-1978. The growth of marine phytoplankton in springsl977 is analysed with more details and shows three phases : - first, the diatoms (especially Skeletonema costatum) grow rapidely (27/4 to 3/5). The growth rate estimated by the chlorophyll measurements is 1.36 day“1. - then (3/5 to.13/5) the concentration of chlorophyll remains more or less constant (23.611.2 mg/m3) as well as the concentration of particulate organic matter. - at the end of the experiment (13/5 to 20/5) the concentration of chlo­rophyll falls as soon as Skeletonema costatum decrease in number.The declin of the phytoplankton biomass is followed by an...
Tipo: Text Palavras-chave: Phytoplancton; Culture; Croissance; Composition chimique; Espèces; Phytoplankton; Culture; Growth; Chemical composition; Species.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00305/41668/40877.pdf
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Frequency demodulation on otolith numerical images for the automation of fish age estimation ArchiMer
Troadec, Herve.
A method to assist the reading of calcified structures with digital images is proposed. An a priori growth pattern is introduced in the image processing to take into account both the variability of the ring size and the non-linearity of their growth. The introduction of biological knowledge is performed within a demodulation processing using the reciprocal growth function. The ring number is estimated by spectral analysis. The constraints introduced by the growth model are weak since they are restricted to the definition of L0, in the case of an exponential model, or of L∞ in the case of a Von Bertalanffy model. When applied to larval Dover sole otoliths (Solea solea) results close to the expert's are obtained. In the case of saithe otoliths (Pollachius...
Tipo: Text Palavras-chave: Otolithe; Image numérique; Âge; Croissance; Solea solea / Pollachius virens; Otolith; Digital image; Age; Growth; Solea solea / Pollachius virens.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00189/30072/28560.pdf
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Observations sur la croissance du tourteau Cancer pagurus en Manche et en golfe de Gascogne ArchiMer
Latrouite, Daniel; Morizur, Yvon.
La production française de tourteaux provient pour l'essentiel des captures réalisées en Manche et dans le Golfe de Gascogne ; l'appréhension des caractéristiques de croissance pour cette ressource est une contribution nécessaire à l'aménagement de l'exploitation des pêcheries concernées. Des expériences de marquage-recapture effectuées de 1981 à 1984 sur les populations des deux bassins permettent une approche de la croissance de Cancer pagurus pour les deux zones concernées.
Tipo: Text Palavras-chave: Molt frequency; Increment; Edible crab; Growth; Aquiculture; Bay of Biscay; Channel; Cancer pagurus; Fréquence de mue; Accroissement; Croissance; Cancer pagurus; Tourteau.
Ano: 1988 URL: http://archimer.ifremer.fr/doc/1988/acte-1417.pdf
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Biologie et pêche traditionnelle des crevettes pénéides dans l'embouchure d'un fleuve en milieur semi-aride (sud-ouest de Madagascar) ArchiMer
Laroche, Jean; Benoely,; Siaviri, A.
Traditional fishing using beach seines was studied over a period of one year at the mouth of the Onilahy river. The catches/efforts were recorded on a daily basis, biological sampling and the measurement of hydrological parameters being carried out twice a month. The moderate variations of salinity and temperature (14 < salinity < 35; 25 degrees C < temperature < 30 degrees C) which were observed in the estuary can be explained by the semiarid climate of the area. Four species of penaeid shrimps are to be found on the Onilahy: Metapenaeus monoceros, Panaeus indicus, Penaeus monodon and Penaeus japonicus, which were mainly caught at the subadult/adult stage with a Carapace length between 10 and 50 mm. The presence of these important sizes at the...
Tipo: Text Palavras-chave: Pêche; Estuaire; Dynamique population; Croissance; Taille corporelle; Cycle évolutif; Zone semi aride; Madagascar; Penaeus japonicus; Penaeus monodon; Penaeus indicus; Metapenaeus monoceros; Rivière Onilahy; Afrique; Milieu saumâtre; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata; Fishing; Estuaries; Population dynamics; Growth; Body size; Life history; Semi arid zone; Malagasy Republic; Penaeus japonicus; Penaeus monodon; Penaeus indicus; Africa; Brackish water environment; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00097/20828/42822.pdf
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Modélisation de la production de l'huître Crassostrea gigas du bassin de Marennes-Oléron (France). Etude de l'influence des apports de nitrates du fleuve Charente sur la production primaire et ostréicole ArchiMer
Raillard, Olivier; Menesguen, Alain.
Oyster production of the Marennes-Oléron Basin is simulated using a model integrating phytoplankton growth, oyster growth and horizontal transport of suspended matter. Firstly the simulations are compared to the measurements. At season scale, the phytoplankton and nitrates evolution are well predicted by the model. In compensation, the model does not simulated well the spring/neap tidal variability of the phytoplankton. Secondly, the phytoplancton and oyster productions are calculated as a function of the nitrates river inputs. Biotic capacity of the basin appears to be particulary influenced by these nutrients during summer. On the other hand, spatial variability of the impact of the nitrates variation is clearly shown, the primary productions of the...
Tipo: Text Palavras-chave: Croissance; Production; Marennes Oléron; Crassostrea gigas; Huîtres; Modélisation.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/1991/acte-3042.pdf
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Essais d'élevage de moules sur tubes amovibles dans le Pertuis Breton ArchiMer
Dardignac-corbeil, Marie-jose.
Lors de la réunion interministérielle tenue à l'Hôtel Matignon le 25 juillet 1980, il fut décidé que la production conchylicole française devait être développée afin de résorber le déficit commercial extérieur pour les moules et d'accroître nos ventes d'huîtres à l'étranger. De 1979 à 1981, la production mytilicole a évolué entre 60 000 et 80000 tonnes et les importations entre 23 600 et 35 700 tonnes; en 1981, le déficit se montait à plus de 81 millions de francs. Pour développer la production, trois voies sont possibles : - l'amélioration des rendements dans les zones déjà exploitées - l'extension des élevages à d'autres secteurs où les techniques habituelles peuvent être utilisées, c·'est à dire sur l'estran - la mise en valeur de sites inaccessibles...
Tipo: Text Palavras-chave: Pertuis Breton; Mytilus edulis; Elevage; Tubes amovibles; Technique; Croissance.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/00045/15585/12987.pdf
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Point sur le programme huître plate - Complément au compte-rendu de réunion REGEMO sur l'Amélioration Génétique de l'huître plate du 11 mars 1998 ArchiMer
Goyard, Emmanuel; Lapegue, Sylvie; Gerard, Andre; Boudry, Pierre.
Ce document vient compéter le rapport REGEMO sur l'huître plate. Une première version visait essentiellement à faciliter le transfert de responsabilité du programme en cours. Celle-ci, épurée des aspects pratiques purement internes, se propose de faire le point sur les familles produites en 1998, et la continuité du programme d'amélioration.
Tipo: Text Palavras-chave: Génétique; Sélection génétique; Huître plate; Ostrea edulis; Génétique population; Croissance.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00049/15980/13422.pdf
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Croissance de jeunes palourdes (Venerupis semidecussata) en nurserie et en mer en fonction des conditions d'élevage ArchiMer
Lucas, Albert.
The japanese palourde Venerupis semidecussata was reared in the Bay of Brest, using hatchery reared spat. Experiments were performed with individuals of lenght 2 to 10 mm raised in a nursery, using raceways with slow running water enriched with unicellular algae, And also with individuals of lenght 8 to 20 mm raised at sea in suspended culture. It was observed that growth depends upon four groups of factors : (1) the functioning and equipment of the raceways, (2) the quantity and quality of the food, (3) the temperature and (4) various physico-chemical factors. When the equipment is satisfactory and when the physico-chemical fac­tors are normal for the species in question, the rate of growth depends essen­tially on the quantity of food, provided that the...
Tipo: Text Palavras-chave: Palourde; Venerupis; Bivalves; Croissance; Nourriture; Température; Nurserie; Culture suspendue; Aquaculture; Clam; Venerupis; Bivalves; Growth; Food; Temperature; Nursery; Suspended culture; Aquaculture.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00305/41657/40866.pdf
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Modélisation de la production ostréicole à Marennes-Oléron : introduction d'un modèle de croissance phytoplanctonique ArchiMer
Raillard, Olivier.
La complication d'un modèle déterministe est une action qui ne peut être envisagée sans raisons impérieuses. En plus des mécanismes nouveaux qu'il importe de connaître précisément pour les formaliser correctement, l'introduction de nouveaux paramètres, dont la valeur exacte n'est jamais connue, accroit l'incertitude du modèle (Klepper et Scholten, 1988) et affecte ainsi sa robustesse (Swartzman et Kaluzny, 1987). A Marennes-Oléron, l'introduction d'un modèle de production primaire doit permettre d'aborder les problèmes suivants : Quelle est véritablement l'impact des débits de la Charente sur la production ostréicole? ou plus précisément : les nutriments d'origine charentaise contrôlent-ils la production phytoplanctonique du bassin et par voie de...
Tipo: Text Palavras-chave: Modélisation; Croissance; Phytoplancton; Modèle biologique; Bassin de Marennes Oléron; Charente Maritime.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00102/21313/18932.pdf
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