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Atouts et contraintes de la conchyliculture normande 1 - La Côte Ouest du Cotentin ArchiMer
Kopp, Joel; Joly, Jean-pierre; Le Gagneur, Eric; Ruelle, Francois.
Grâce à une approche multidisciplinaire, ce document constitue la synthèse des connaissances acquises sur la filière conchylicole (huîtres creuses et moules) de la côte Ouest du Cotentin depuis 3 ans. Les aspects positifs, les contraintes et les difficultés physiques, administratives, socio-économiques et biologiques qui caractérisent cette activité ont été abordés tour à tour. Leur synergie a été analysée pour mettre en évidence les mesures de gestion réaliste les plus adaptées.
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Ano: 1998 URL: http://archimer.ifremer.fr/doc/00082/19323/16917.pdf
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Atouts et contraintes de la conchyliculture normande - 2. La Côte Est du Cotentin ArchiMer
Kopp, Joel; Joly, Jean-pierre; Legagneur, Eric; Ruelle, Francois.
Grâce à une approche multidisciplinaire, ce document constitue la synthèse des connaissances acquises depuis 3 ans sur la filière conchylicole active le long de la côte Est du Cotentin (huîtres creuses et moules). Les différents aspects positifs, les contraintes et les difficultés physiques. administratives, sociales, économiques et biologiques qui caractérisent cette activité ont été abordés tour à tour. Leurs synergies et leurs évolutions ont été analysées pour proposer les mesures de gestion réalistes et efficaces les plus adaptées aux situations actuelle et future. C'est ainsi que les caractères généraux très favorables des conditions d'exploitation ont été mis en évidence, tant au plan physique (largeur de l'estran, dureté du sol le plus souvent...
Tipo: Text Palavras-chave: Ostréiculture; Mytiliculture; Estimation des stocks; Croissance; Socio-économie; Typologie des entreprise; Normandie; Cotentin.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00092/20370/18032.pdf
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Biomasses ostréicoles et mytilicoles de Normandie en 1995 ArchiMer
Kopp, Joel; Joly, Jean-pierre; Legagneur, Eric; Ruelle, Francois.
L'étude des stocks ostréicoles et mytilicoles a été réalisée pour la première fois sur l'ensemble des bassins conchylicoles de Basse-Normandie en 1995, sauf sur le secteur mytilicole d'Utah Beach (côte Est du Cotentin) où l'étude n'a pu être faite qu'en 1996. A partir des stratégies d'échantillonnages établies lors des études précédentes, les stocks en élevage ont été estimés à 71.728 tonnes (dont 44.051 t commercialisables) pour les huîtres en octobre, et 13.289 tonnes nettes pour les moules en mai. Si le stock de moules apparaît stable depuis la dernière estimation de 1993, on observe une importante augmentation de la biomasse d'huîtres depuis 1991. Cette augmentation est rattachée à une meilleure exploitation de secteurs peu exploités précédemment, la...
Tipo: Text Palavras-chave: Ostréiculture; Mytiliculture; Estimation des stocks; Croissance; Normandie.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00092/20368/18030.pdf
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Cartographie des zones mytilicoles potentielles sur le littoral du Nord/Pas-de-Calais ArchiMer
Ruelle, Francois; Morel, Marc.
Deux notes rédigées par l'IFREMER en 1981 et 1982 sur le "développement possible de la mytiliculture dans la Région Nord/Pas-de-Calais" ont mis en évidence le niveau relativement bas des activités mytilicoles ; celles-ci sont, dans l'ensemble, limitées à l'exploitation des gisements naturels et des concessions de culture à plat sur les zones rocheuses du Boulonnais. Cette situation pourrait être améliorée par un programme incitatif de développement encourageant les professionnels à mettre en valeur les sites potentiels à l'aide de techniques traditionnelles (bouchots) ou nouvelles (filières, soucoupes ballastables). C'est dans cet objectif que l'IFREMER a établi le présent document qUi indique, à l'aide de cartes et de notes explicatives, l'utilisation...
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Ano: 1986 URL: http://archimer.ifremer.fr/doc/00080/19140/16735.pdf
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Genotype by diet interactions in European sea bass (Dicentrarchus labrax L.): Nutritional challenge with totally plant-based diets ArchiMer
Le Boucher, Richard; Vandeputte, Marc; Dupont-nivet, M.; Quillet, E.; Ruelle, Francois; Vergnet, Alain; Kaushik, Sadasivam; Allamellou, J. M.; Medale, F.; Chatain, Beatrice.
Aquaculture of carnivorous species has strongly relied on fish meal and fish oil for feed formulation; however, greater replacement by terrestrial plant-based products is occurring now. This rapid change in dietary environment has been a major revolution and has to be taken into consideration in breeding programs. The present study analyzes potential consequences of this nutritional tendency for selective breeding by estimating genetic parameters of BW and growth rates estimated by the thermal growth coefficient (TGC) over different periods with extremely different diets. European sea bass (Dicentrarchus labrax L.) from a factorial cross (1,526 fish) between 25 sires and 9 dams were used to estimate heritabilities and genotype by diet interaction. Starting...
Tipo: Text Palavras-chave: European sea bass; Genetic correlation; Genotype by diet interaction; Genotype by environment interaction; Plant-based diet.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00146/25711/26299.pdf
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In search for indirect criteria to improve feed utilization efficiency in sea bass (Dicentrarchus labrax) Part II: Heritability of weight loss during feed deprivation and weight gain during re-feeding periods ArchiMer
Grima, Laure; Chatain, Beatrice; Ruelle, Francois; Vergnet, Alain; Launay, Amandine; Mambrini, Muriel; Vandeputte, Marc.
Selective breeding to improve residual feed intake (RFI) in sea bass (Dicentrarchus labrax) is a major goal that would optimize economic gain while minimizing the environmental impact of production. Due to the difficulty in accurately measuring individual feed intake, no selective breeding program has yet been started. In a previous study, we identified a criterion phenotypically related to RFI variations: the loss of weight during feed deprivation, FD. Moreover, an additional composite criterion (CC) integrating both FD and weight gain during subsequent re-feeding (RF) was closely related to RFI, even though the relationship was only close to significance (P=0.06). The aim of the present study was to estimate the heritability of these two traits, in order...
Tipo: Text Palavras-chave: European sea bass; Dicentrarchus labrax; Feed efficiency; Heritability; Genetic parameters; Residual feed intake; Feed deprivation; Compensatory growth; Selective breeding.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00004/11529/8213.pdf
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In search for indirect criteria to improve residual feed intake in sea bass (Dicentrarchus labrax) Part I: Phenotypic relationship between residual feed intake and body weight variations during feed deprivation and re-feeding periods ArchiMer
Grima, Laure; Vandeputte, Marc; Ruelle, Francois; Vergnet, Alain; Mambrini, Muriel; Chatain, Beatrice.
No commercial breeding programs have yet started to improve feed utilization efficiency in fish, mainly because of the difficulty in accurately measuring individual feed intake in fish reared in groups. Our general goal is to propose indirect criteria to be used for breeding of commercial lines. In a previous study undertaken with rainbow trout clones, a genetic correlation was detected between residual feed intake (RFI), and body weight variation during successive periods of feed deprivation (FD) and re-feeding (RF). To assess the pertinence of such indirect criteria for future breeding programs, we set up a large experiment using sea bass (Dicentrachus labrax), a recently domesticated species with broad genetic diversity. The objectives of the present...
Tipo: Text Palavras-chave: European sea bass; Dicentrachus labrax; Feed efficiency; Residual feed intake; Feed deprivation; Compensatory growth; Selective breeding.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00002/11297/7838.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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L'exploitation rationnelle des ressources de la mer. Gestion des bassins conchylicoles ArchiMer
Kopp, Joel; Joly, Jean-pierre; Le Gagneur, Eric; Ruelle, Francois.
L'élément marquant intervenu durant l'année 1995 est l'augmentation considérable de la production d'huîtres commercialisables sur l'ensemble du littoral avec 44.000 tonnes produites en 1995 (dont 34.500 t pour le seul département de la Manche) contre 36.000 tonnes en 1990. Cette augmentation était déjà pressentie dans un précédent rapport (Jeanneret et al, 1992), car de nombreux terrains concédés n'étaient pas encore mis en exploitation. Le mot "commercialisable" est important car il ne préjuge pas de la quantité d'huîtres réellement commercialisée. On sait combien la campagne de vente 1995 a été difficile pour l'ensemble des ostréiculteurs français, avec notamment un effondrement des prix de vente à la production (- 30 %) et une part importante d'invendus...
Tipo: Text Palavras-chave: Stocks ostréicoles; Stocks mytilicoles; Biochimie; Mortalité naissain; Normandie.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00092/20366/18029.pdf
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L'ostréiculture sur la côte Ouest du Cotentin ArchiMer
Goulletquer, Philippe; Joly, Jean-pierre; Kopp, Joel; Legagneur, Eric; Moriceau, Jacques; Ruelle, Francois.
L'ostréiculture sur la côte Ouest Cotentin a été étudiée à partir d'estimations des stocks en élevage et de suivis de populations entre 1990 et 1992. A partir de stratégies d'échantillonnages, les stocks en élevage ont été estimés à 33 556 et 35 542 t respectivement en 1990 et 1991. Sur une production normande annuelle totalisant 34 914 tonnes, 53% a été produit sur la côte Ouest Cotentin en 1990. Un modèle global d'aménagement est proposé définissant la relation entre les performances de croissance mesurées, les cheptels en élevage, le niveau d'émersion, et la distance par rapport aux principales sources d'éléments nutritifs terrigènes. Près de 80% de la variabilité du poids final est expliqué par ce modèle régressif destiné à faciliter les décisions...
Tipo: Text Palavras-chave: Crassostrea gigas; Stock; Croissance; Composition biochimique; Aménagement; Cotentin.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00092/20326/17972.pdf
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Mussel (Mytilus edulis) culture management along the Normandy coastline (France) : stock assessment and growth monitoring ArchiMer
Goulletquer, Philippe; Joly, Jean-pierre; Le Gagneur, Eric; Ruelle, Francois.
The Normandy region is presently a leading shellfish rearing area in France yielding 35,000 metric tons of oysters C. gigas and Il,000 metric tons of mussels M. edulis on a yearly basis. Preliminary studies were initiated in 1989, 1991 and 1992 to develop the sampling strategy for cultured mussel stock assessment. Comprehensive mussel stock assessment and concomitant growth monitoring were carried out in 1993 to study mussel population and optimize overall s1l1ellfish culture management. A three-stage cluster sampling strategy combined with stratification was tested on the 278 kms 'bouchot' type culture with a sampling effort of 275 units. Stratification was based upon two criteria including geographical sector and tidal level. Overall biomass was...
Tipo: Text Palavras-chave: Model; Growth monitoring; Stock assessment; Mytilus edulis; Blue mussel; Modèle; Suivi de croissance; Estimation de stocks; Mytilus edulis L.; Moule bleue.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/acte-3073.pdf
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Obtention de souches conchylicoles performantes par polyploïdisation (5ème partie) ArchiMer
Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Baud, Jean-pierre; Nourry, Max; Haure, Joel; Heurtebise, Serge; Garnier, Jacqueline; Martin, Anne-genevieve; Claude, Serge; Langlade, Aime; Joly, Jean-pierre; Goulletquer, Philippe; Ruelle, Francois; Coatanea, Denis; Oheix, Jocelyne; Vercelli, Catherine; Chabirand, Jean-michel; Maurer, Daniele; Borel, Michel; Cardinal, Mireille; Cornet, Josiane; Le Pennec, Marcel; Le Mercier, A..
This fifth part of the polyploidisation program reports the experiments that were conducted in 1993 and that were devoted to : - monitoring growth performance of Ostrea edulis diploids and triploids in La Trinité sur Mer and Palavas - monitoring growth performance of Crassostrea gigas diploids and triploids in Port en Bessin, Marennes Oleron (2 locations), Arcachon and Palavas - comparative study of gametogenesis for C. gigas diploids and triploids - comparative study of C. gigas diploids and triploids using sensorial analysis At the end of fifth year, it was clear that triploids are advantageous although such a statement must be moderated according to locations. The gametogenesis stydy showed that triploidy is associated with partial to complete...
Tipo: Text Palavras-chave: Crassostrea gigas; Ostrea edulis; Cytogenetics; Polyploidy; Crassostra gigas; Ostrea edulis; Cytogénétique; Polyploïdie.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/rapport-3860.PDF
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Probiotic treatment of live food organisms for Atlantic bluefin tuna larvae: microbiological & immunological criteria ArchiMer
Coves, Denis; De Vogue, Benoist; Desbruyeres, Elisabeth; Dhormes, Benoit; Fievet, Julie; Huelvan, Christine; Lallement, Stephane; Le Gall, Marie-madeleine; Ruelle, Francois; Vidal, Marie-odile; Castex, M.; Mazurais, David; Cahu, Chantal; Gatesoupe, François-joel.
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00051/16189/13702.pdf
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REMOR : Organisation du réseau de suivi de la croissance de l'huître creuse - Principaux résultats depuis 1993 ArchiMer
Goyard, Emmanuel; Baud, Jean-pierre; Claude, Serge; Le Moine, Olivier; Maurer, Daniele; Mazurie, Joseph; Ruelle, Francois; Vercelli, Catherine.
The Aquaculture Resources Department's mollusc network (REMORA) federates six coastal Ifremer laboratories. Since 1993, REMORA has implemented a unique national protocol to account for the variability in the growth of Pacific oysters farmed in 39 sites within the main production areas, from Normandy to the Mediterranean Sea. In 1995, the goal of the network was expanded to include monitoring of a second age class. To do so, the protocol developed for adults was adapted to monitor juveniles. The data, organised in Excel worksheets with a specific application written in Visual Basic, allows for inter-station and inter-annual comparisons and thereby constitutes a database of interest to oyster farmers, scientists and administrative personnel.
Tipo: Text Palavras-chave: REMORA; Crassostrea gigas; Huîtres; Croissance.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/1997/acte-3255.pdf
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Réseau de suivi de la croissance de l'huître creuse sur les côtes françaises. REMORA. Résultats des stations nationales. Année 1997 ArchiMer
Fleury, Pierre-gildas; Ruelle, Francois; Claude, Serge; Palvadeau, Hubert; Robert, Stephane; D'Amico, Florence; Vercelli, Catherine; Chabirand, Jean-michel.
1. Introduction: network organisation in 1997. The REMORA network - REseau MOIIusques du département Ressources Aquacoles de l'Ifremer - (Ifremer's Aquaculture Resources Department Mollusc Network) has been evaluating, since 1993, hollow oysters' growth (Crassostrea gigas) in major French oyster beds. In order to do so, it has followed up on a yearly basis the growth of a unique oyster batch shared among different stations in the main French raising areas. Releasing takes place in February and picking happens in November or December; intermediary sampling is done in June and September. All operations happen on the same dates for all stations. A national report is published each year. 'Regional' stations are sometimes added to the national network, but they...
Tipo: Text Palavras-chave: France; Growth; Network of monitoring; Crassostrea gigas; Oyster culture.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/rapport-1765.pdf
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REseau MOllusques des Rendements Aquacoles huitre creuse (REMORA) ; Résultats des stations nationales. Année 1998 ArchiMer
Fleury, Pierre-gildas; Ruelle, Francois; Claude, Serge; Palvadeau, Hubert; Robert, Stephane; Vercelli, Catherine; Chabirand, Jean-michel; D'Amico, Florence.
The monitoring network IFREMER /REMORA is assessing on a yearly basis, from February to December, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year class ; and "adults" = two-years class), deployed among various stations of the main French oyster areas. This network is a tool for trend estimations (geographic and chronological, on the national scale) ; it must not be considered as an accurate estimation of professional oyster ongrowings. Based on REMORA results, generally tallied with professional observations, 1998 on the whole was a second year of low mortality. However several areas remained affected by significant mortalities : the baie des Veys (in Normandy), Morlaix and Pen-Bé (in Brittany) and Marennes (in...
Tipo: Text Palavras-chave: Polydora; Commercial quality; Growth; Mortality; Crassostrea gigas; Pacific cupped oyster; France; REMORA; Polydora; Qualité commerciale; Croissance; Mortalité; Crassostrea gigas; Huître creuse; France; REMORA.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/rapport-1638.pdf
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