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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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Facteurs de différenciation de la croissance de l'huître creuse Crassostrea gigas dans les principaux bassins ostréicoles français entre 1990 et 1995 ArchiMer
Jourdain, Céline.
In order to find the global parameters which could explain the growth of Pacific Oyster Crassosrrea gigas. a survey of Pacific Oyster's growth has been done in Brittany from 1990 to 1995 and in France from 1993 to 1995. The analysis shows the positive influence of rain amount on weight grov,th except in eutrophic areas where it is the contrary. It also shows the positive influence of temperature provided it stays within an optimal range. statistically defined. Some characteristics of the production areas have been reviewed without achieving clear explanation of growth differences between sites. Further studies are necessary particularly in hydrodynamics and primary production determinism to progress.
Tipo: Text Palavras-chave: Huitre creuse; Crassosrrea gigas; Croissance; Meteorologie; Environnement; REMORA.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00082/19322/16916.pdf
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L'huître creuse Crassostrea gigas en Bretagne. Résultats du réseau de suivi de 1991 ArchiMer
Le Bec, Claude; Mazurie, Joseph.
The year 1991 is the third one of the regional network on growth assessment of Crassostrea gigas in Brittany, wearing on 9 sites and 3 stations per site. 2 bags of 210 oysters, 18 month old, were placed in each station. Comparatively to previous years, the 1991 growth was moderate, and condition index inferior. However, the survival rates were very high (above 91 %) and most of the slight mortalities occurred a short time after stocking (as revealed by the sizes of dead shells). An improvement was also observed in the infestation rate by the polychaete Polydora sp..Most of the growth differences between sites and stations are still present. An analytical study including environmental variables would be necessary for explanations and will be tempted in 1993.
Tipo: Text Palavras-chave: Bretagne; Crassostrea gigas; Croissance; Mortalité; Indice de condition; Polydora; A.C.P.; Brittany; Crassostrea gigas; Growth; Mortality; Condition index; Polydora; Factorial analysis.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00102/21319/18939.pdf
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Mise au point technique de l'élevage de l'ombrine Sciaenops ocellata. Document 5 : Le grossissement ArchiMer
Soletchnik, Patrick; Goyard, Emmanuel; Thouard, Emmanuel.
Aux USA, et plus particulièrement en Caroline du sud, l'étude de la croissance de l'ombrine, a commencé dès 1947, à partir des populations naturelles retenues dans les marais salants (Lunts 1951, d'après Smith et al, 1985) puis se sont poursuivies (Theling and Loyacano 1976), également en Louisiane (Beckman et al, 1988 ; Boothby et Avault, 1971 ; Bass et Avault, 1975). En élevage, très peu de données existent sur les performances de croissance de cette espèce jusqu'à une taille commercialisable. Hopkins et al, (1987) fait part de quelques résultats en bassin de terre. Peu de travaux existent sur les besoins alimentaires de l'espèce (Daniels et Robinson, 1986 Williams et Robinson, 1988, Robinson, 1988). Dans le cadre du programme de mise au point technique...
Tipo: Text Palavras-chave: Elevage; Ombrine; Sciaenops ocellata; Conditions environnementales; Croissance; Grossissement.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/00132/24372/22385.pdf
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REMONOR : résultats 2005. Evaluation de la mortalité, croissance et qualité des huîtres creuses ArchiMer
Mary, Charlotte; Pien, S; Blin, J.l.; Ropert, Michel.
The regional monitoring network REMONOR, relying on the experience of IFREMER's REMORA national network, each year assesses the mortality, growth and quality for two age classes ("adults" = 2 years and "juveniles" = 1 year) of cup oysters, distributed among various farm sites in the main oyster farming sectors of Lower Normandy. This network, led in collaboration by LERN (Environment Resources Laboratory) and SMEL (Coastline Installations Public-Private Entity), this year welcomes a new farm site in Veules les Roses, in Seine Maritime (76), bringing to 18 the total number of monitored sites. For operational reasons, a reduced monitoring protocol was conducted in 2005 on this last farm site, which will not take on the network's standardised protocol until...
Tipo: Text Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Cupped (gigas) oyster; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Huître creuse; Crassostrea gigas.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/rapport-2212.pdf
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Etude du polymorphisme des gènes de l'amylase chez Crassostrea gigas : relation avec les paramètres physiologiques de l'assimilation et croissance ArchiMer
Degremont, Lionel; Moal, Jeanne; Daniel, Jean-yves; Boudry, Pierre; Van Vormhoudt, A.; Sellos, D.; Samain, Jean-francois.
In the scope of the European program GENEPHYS, which aims to establish the relationship between the genetic base and the physiological characters in relation to the growth in Crassostrea gigas, it has been demonstrated that the most explanatory factors for the growth variability are assimilation performance and aneuploidy. A model linking the assimilation performances and the digestive equipment has been set up and more than 70% of the variability can be explained by two digestive enzymes: laminarinase and amylase. A number of laboratories have decided to focus on the latter.
Tipo: Text Palavras-chave: Croissance; Génétique; Polymorphisme; Crassostrea gigas.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/acte-3269.pdf
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Surveillance et amélioration des élevages. Synthèse des actions engagées et des principaux résultats. ArchiMer
Mazurié, Joseph; Martin, Anne-genevieve; Fleury, Pierre-gildas; Bouget, Jean-francois.
Un programme de soutien à la conchyliculture était inscrit au contrat Etat-région 1994-1998, intitulé "amélioration des écloseries et soutien à la conchyliculture bretonne". Ce rapport synthétise les résultats acquis au laboratoire Ifiemer DRVIRA-LCB de La Trinité-sur- Mer, qui portent sur la surveillance et l'amélioration génétique : 3 volumes plus détaillés traitant du suivi de la croissance, de la surveillance des maladies et d'un système de surveillance biologique de la qualité de l'eau sont joints. La partie relative à la maîtrise des écloseries est rapportée séparément par le laboratoire de physiologie des mollusques d'Ifiemer Brest.
Tipo: Text Palavras-chave: Conchyliculture; Bretagne; Huître creuse; Huître plate; Moules; Surveillance; Croissance; Pathologie; Génétique.
Ano: 1999 URL: https://archimer.ifremer.fr/doc/00622/73455/72694.pdf
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La mytiliculture dans la Manche. Biomasses en élevage et croissance de Mytilus edulis L. ArchiMer
Goulletquer, Philippe; Joly, Jean-pierre; Le Gagneur, Eric; Ruelle, Francois.
This report describes the mussel Mytilus edulis sampling stock strategy developed to carry out stock assesments along the French Normandy coastline between 1989 and 1993. The overall totalnetweight reached 13,992 metric tons in 1993 with 27% precision level. Simultaneously, a growth study was carried out on 36 experimental sites to estimate overall variability. Individual total weight varied from 6.6 to 12 g at rearing cycle completion. An empirical management model conceming the Western Cotentin rearing areas was proposed and explained 68% of total weight variance. Based on a stepwise multilinear relationship, the model linked overall growth performance to local stocking density, tidal distribution, and distance from the main runoffs inputs. It aims to...
Tipo: Text Palavras-chave: Mytilus edulis; Manche; Stock; Croissance; Mytilus edulis; Manche; Stocking density; Growth.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00072/18360/15932.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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Rapport d'activité année 1979 du Laboratoire de Biologie Conchylicole de La Tremblade ArchiMer
Heral, Maurice.
Rapport d'activité du Laboratoire de Biologie Conchylicole de La Tremblade concernant l'année 1979
Tipo: Text Palavras-chave: Conchyliculture; Physiologie; Crassostrea gigas; Mytilus edulis; Reproduction; Estimation stock; Croissance; Ruditapes decussatus; Ruditapes philippinarum; Marennes Oléron.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00070/18088/15636.pdf
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Mathematical model and numerical simulations of the migration and growth of Biscay Bay anchovy early larval stages ArchiMer
Boussouar, Ahmed; Le Bihan, Soizick; Arino, Ovide; Prouzet, Patrick.
The paper presents a mathematical model of the early larval stage, from spawn to the resorption of the yolk-sac, of the anchovy, Engraulis encrasicolus, of the Bay of Biscay. The model describes the temperature-dependent growth and drift of passive larvae by the currents and vertical turbulence. A numerical code has been built and numerous simulations, fed by both biological (egg surveys by AZTI-San Sebastian, Spain, and IFREMER, France) and physical (circulation model by IFREMER-Brest, France) data, were undertaken. Their main features are presented and discussed here, and some conclusions on the possible utilization of the results in improving estimates of anchovy stocks by the daily egg production method are drawn.
Tipo: Text Palavras-chave: Passive stage; Numerical simulation; Migration; Growth; Anchovy; Stade passif; Simulation numérique; Migration; Croissance; Anchois.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/publication-518.pdf
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Etude et modélisation de la dynamique des populations de bivalves en élevage (Crassostrea gigas et Mytilus galloprovincialis) dans le bassin de Thau (Méditerranée, France) et des ascidies solitaires associées ArchiMer
Gangnery, Aline.
The total standing stock of bivalves cultured in Thau Lagoon (France) that is mainly constituted of the Pacific oyster, Crassostrea gigas, and the Mediterranean mussel, Mytilus galloprovincialis, vary between 14,000 and 20,000 tons within a year. These variations were attributed to the rearing cycle of molluscs in the lagoon but also to their growth performances. Oysters cultured in the Thau Lagoon presented the best growth rate ever reported whereas trophic conditions are low : mean concentrations in organic particulate matter and total chlorophyll a averaged 1 mg.l-1 and 1.2 µg.l-1, respectively. The development of a growth model shows that temporal pattern (i.e. seasonality) of bivalve growth is explained by water temperature and spatial pattern is...
Tipo: Text Palavras-chave: Lagoon ecosystem; Resource management; Rearing strategies; Production; Standing stock; Hydrobiology; Growth; Shellfish culture; Ascidiella aspersa; Mussel; Oyster; Ecosystème lagunaire; Gestion des ressources; Stratégies d'élevage; Production; Stock; Hydrobiologie; Croissance; Conchyliculture; Ascidiella aspersa; Moule; Huître.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/these-102.pdf
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Mortalité de l'huître Crassostrea gigas dans le bassin de Marennes-Oléron: étude de la variabilité spatiale de son environnement et de sa biologie par un système d'informations géographiques (SIG) ArchiMer
Soletchnik, Patrick; Le Moine, Olivier; Faury, Nicole; Razet, Daniel; Geairon, Philippe; Goulletquer, Philippe.
The summer mortality patterns was studied in 1996 on the Ronce-les-Bains oyster bank (175 ha), located on the southern part of the Bay Marennes-Oleron (Atlantic coastline). Studies on growth, sexual maturation, survival rates and environmental variables were compared at fifteen experimental sites (on- and off-bottom culture). After 7 months, cumulative mortality reached 8-19 and 23-33% for off-bottom and on-bottom culture, respectively which is significantly higher for the latter case. A seasonal mortality trend was noted, with a significant increase related to air temperature greater than 20 degrees C and with a significant pre-spawning glycogen catabolism. Based on soft tissue flesh growth results from both types of culture, several empirical models were...
Tipo: Text Palavras-chave: Atlantic Ocean; Crassostrea gigas; Mortality; Growth rates; Océan Atlantique; Crassostrea gigas; Mortalité; Croissance.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/publication-862.pdf
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Preliminary results on growth and movements of dogfish Scyliorhinus canicula (Linnaeus, 1758) in the Cantabrian Sea ArchiMer
Rodriguez-cabello, C; De La Gandara, F; Sanchez, F.
In this paper we present the first results on growth of dogfish (Scyliorhinus canicula L.) obtained from size frequency distributions collected during bottom trawl surveys and from 19 recaptures to date from 2 153 tagged individuals. The surveys belong to a series carried out in autumn in the Cantabrian Sea by the Institute Espanol de Oceanografia (1983-1995). The estimated parameters from the von Bertalanffy equation applying the Bhattacharya, Gulland and Holt and Ford-Walford methods were K of around 0.09-0.13, and a maximum length close to 89-98 cm. In addition, based on ten recoveries with reliable data of location we assume a priori that this species does not move long distances in the area of study
Tipo: Text Palavras-chave: Roussette; Croissance; Répartition en taille; Recapture; Migration; Dogfish; Growth; Length-frequency; Recapture; Migration.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00326/43691/43119.pdf
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REMONOR, Résultats intermédiaires 2007: Evaluation de la mortalité, croissance et qualité des huîtres creuses en Normandie ArchiMer
Pien, S.; Mary, Charlotte.
The first half of 2007 is characterised by very low summer mortality rates (spring mortality has not been analysed due to the bad quality of the original batch). This low rate concerns the two different size classes of each station except Géfosse (BV02) where a high mortality has been monitored (see SUMON monitoring). Growth seems significant, but the adults' initial weight required a finer analysis. Juveniles had a larger growth than the previous years, and especially on the west coast. On the adult side, maturation was well advanced in June, but the September biometrics showed disparate filling rates between the different stations, and had us suppose that the spawning season was on.
Tipo: Text Palavras-chave: REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Huître creuse; Crassostrea gigas.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/rapport-3469.pdf
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Sélection des mollusques : bilan et nouvelles perspectives concernant la croissance, la qualité et les résistances aux maladies ArchiMer
Naciri, Yamama.
In the case of molluscs, the implementation of selection programs with a precise evaluation of the available genetic variability and the estimate of the transmissibility of the characters as well as their correlations, face two main obstacles: the first one, specific, derives from the existence of some reproduction systems that are sometimes complex and still imperfectly mastered as for the flat oyster plate Ostrea edulis; the other, more general, is directly dictated by the importance of the infrastructures needed to keep a large number of differentiated families in controlled farming conditions. Despite these obstacles, a number of programs have been developed over the last twenty years with encouraging results.
Tipo: Text Palavras-chave: Marqueurs; Hybridation; Croissance; Sélection; Huîtres; Mollusques; Génétique.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/acte-6525.pdf
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Etude du polymorphisme des gènes de l'amylase chez Crassostrea gigas (Thunberg, 1793). Relation avec les paramètres physiologiques de l'assimilation ArchiMer
Degremont, Lionel.
L'analyse du polymorphisme des gènes de J'amylase chez Crassostrea gigas (Thunberg, 1793) a été établi sur deux générations dans le cadre du programme européen GENEPHYS (génétique et physiologie chez C.gigas). Après une amplification de l'ADN par PCR à partir de deux couples d'amorces qui sont spécifiques à chacun des deux gènes de l'amylase, une digestion par EcoRI de l'ADN amplifié suivie d'une électrophorése en gel d'agarose sont effectuées. Cette technique (RFLP) permet de déterminer le polymorphisme génétique des huîtres creuses. Une troisième génération a été réalisée afin d'obtenir quatre familles et d'en analyser le génotype. Ces familles ont été tout d'abord placées pendant cinq mois dans un milieu riche en nourriture, puis ensuite, chaque famille...
Tipo: Text Palavras-chave: Crassostrea gigas; Amylase; Polymorphisme; Croissance; Efficacité d'assimilation.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00439/55109/56561.pdf
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Approche de la capacité trophique d'un écosystème conchylicole ArchiMer
Heral, Maurice; Deslous-paoli, Jean-marc; Prou, Jean.
After a short bibliographical study of the different approaches for determination of the trophic capacity of a bay for molluscs culture, the authors, with a global mode, show the relations between the growth performance of the oysters Crassostrea gigas in relation with the cultivated stocks. The volumes of consumed and assimilated food are calculated for the stocks in relation with the incoming volumes of water in the bay and the residence time for neap tide and spring tide. The authors find a decrease of growth rate in relation with the volume of consumed food. When it is above 60% and when the volume of assimilated food is above 20%, there is a large decrease of the growth of oysters.
Tipo: Text Palavras-chave: Crassostrea gigas; Oysters; Stock assessment; Models; Food consumption; Growth; Biomass; Stock cultivé; Biomasse; Croissance; Modèle; Crassostrea gigas; Huîtres; Capacité trophique.
Ano: 1988 URL: http://archimer.ifremer.fr/doc/1988/acte-3834.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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Contribution à l'étude de la biologie et de la pêche du rouget-barbet (Mullus surmuletus) dans le Golfe de Gascogne ArchiMer
Tous, Philippe.
The growth study of s tripped Mullet, from the Bay of Biscaye, from April to June is managed by scale reading. Sorne difficulties appear with the interpretation female scales. The Analysis of ovaries confirms that spring is the period of reproduction, and shows that the age of first reproduction is two year (65 %) or one year old (35 %). Secondly, the exploitation of various statistic data shows the evolution of landings of Stripped Mullet in several harbours, and especially in les Sables d'Olonne, since 1962.  The reconstitution of the artisan trowlers effort in this harbour confirms the long decline of c.p.u.e . for Mullus surmuletus, and a rapid increase since 1981. The problem of the lack of data about the inshore fishery and about the composition of...
Tipo: Text Palavras-chave: Reproduction; Croissance; Golfe de Gascogne; Chalutiers artisans et côtiers; CPUE.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/00455/56649/58390.pdf
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