The assessing of Pacific oyster (Crassostrea gigas) rearing performances by the IFREMER/REMORA network: method and first results (1993–98) in Brittany (France)

Fleury, Pierre-Gildas; Goyard, Emmanuel; Mazurié, Joseph; Claude, Serge; Bouget, Jean-François; Langlade, Aimé; Coguic, Yvette Le

doi:10.1007/978-94-010-0434-3_20

Cited by 15 publications

(23 citation statements)

References 6 publications

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“…This must be considered when discussing differences in the CII between both species. Although growth was not measured during the course of the experiment, tissue growth data for oysters in Aber Benoît (Fleury et al, 2001) and for scallops in the Bay of Brest (Lorrain et al, 2004) reveals that at the same age, a scallop produces annually at least two times more soft tissues than an oyster. Therefore, a part of the observed difference in CII values could be due to differences in tissues growth between the two species.…”

Section: Discussionmentioning

confidence: 99%

Experimental shift in diet δ13C: A potential tool for ecophysiological studies in marine bivalves

Paulet

Lorrain

Richard

et al. 2006

Organic Geochemistry

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To test the potential of diet switching experiments in ecophysiological studies of marine invertebrates, stable carbon isotope ratios were measured at different seasons in the gonad, adductor muscle, digestive gland and gills of scallops (Pecten maximus) and oysters (Crassostrea gigas) held for 15 days on a constant diet of phytoplankton depleted in 13 C. The aim of this study was to determine if differences in carbon incorporation could be detected among species, seasons and organs, and if so, whether it was consistent with their known energy-allocation patterns. After offering the new diet, isotope values of the different organs gradually shifted and significant differences among organs, seasons and species were found. A carbon incorporation index (CII) was calculated to compare the metabolic activity of each organ of the two species between day 0 and day 15. For both species, the digestive gland had the highest CII, the adductor muscle the lowest, while gonad and gills had intermediate values. The CII was generally much higher in P. maximus than in C. gigas, suggesting higher metabolic activity in this species. Seasonal differences in the CII were also observed for the two species and were interpreted as differences in metabolic activity in accordance with our energy allocation scenario. Therefore, stable isotope diet switching experiments appear to be of great value for assessing metabolic orientation in bivalves.

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Section: Discussionmentioning

confidence: 99%

Experimental shift in diet δ13C: A potential tool for ecophysiological studies in marine bivalves

Paulet

Lorrain

Richard

et al. 2006

Organic Geochemistry

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“…Food content in the seawater can interact with temperature and influence the energy storage and their spawning event (Dridi, Romdhane & Elcafsi ). Seasonal growth rate depended on temperature, salinity, total suspended matter (TSM), organic matter (OM), inorganic matter (IM) and chlorophyll a (Fleury, Goyard, Mazurié, Claude, Bouget, Langlade & Le Coguic ; Cassis, Pearce & Maldonado ). Survivorship curves depends on physical factors such as temperature, salinity, desiccation, excessive deposition of silt and biological factors such as predators, parasites, pathogens and competitors for food and space (Tomaru, Kawabata & Nakano ; Lodeiros, Pico, Prieto, Narváez & Guerra ; Chávez‐Villalba, Hernández‐Ibarra, López‐Tapia & Mazón‐Suástegui ).…”

Section: Introductionmentioning

confidence: 99%

The effects of environmental factors on survival, growth and biochemical composition of transplanted oysters (OstreaedulisLinnaeus, 1758) from Aegean Sea to southern Black Sea

Çelik

Karayücel

et al. 2013

Aquac Res

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This study examined survival, growth rate and biochemical composition of oysters (Ostrea edulis) when transplanted from Aegean Sea to southern Black Sea (Sinop) and maintained offshore in a submerged long‐line from December 2008 to December 2009. In December 2009, the mean length and live weight were 92.52 ± 1.40 mm and 109.60 ± 2.41 g respectively. Mean specific growth rate (SGR) was found as 1.29 ± 0.16%. Meat yield ranged from 7.90 to 11.47%. Mean moisture and ash were 81.40 ± 0.52% and 9.50 ± 0.55% respectively. Protein content was between 36.57% and 61.31% with a mean of 50.17 ± 2.13%, while lipid content was between 4.83% and 10.86% with a mean of 7.74 ± 0.49%. Carbohydrate content was between 20.88% and 46.89% with a mean of 32.59 ± 2.38%. The study demonstrated that protein, lipid and carbohydrate were used for different metabolic needs of oysters. Mortality was dependent on physiological stress related to the gonadal activity, temperature and inorganic matter in seawater. Consequently, the low salinity rate has a negative impact on growth rate of oyster. However, there was not a serious adaptation problem in transplanted oysters from Aegean Sea to Black Sea.

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“…Such pathogens can cause severe production losses in the industry. The main aquaculture activity in France is the rearing of Pacific oysters Crassostrea gigas, but it has recurrently suffered large scale summer mortality phenomena over the last 15 years [1]. In particular, V. aestuarianus [2,3] and V. splendidus [4,5] have been reported to be associated with summer mortality of oyster spat reared in open sea tidal areas and, to a lesser extent, in older animals [6].…”

Section: Introductionmentioning

confidence: 99%

A Large-Scale Epidemiological Study to Identify Bacteria Pathogenic to Pacific Oyster Crassostrea gigas and Correlation Between Virulence and Metalloprotease-like Activity

et al. 2009

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A 4-year bacteriological survey (2003-2007) of four molluscs cultivated in France and faced with mortality episodes was performed by the French shellfish pathology network. The more abundant bacteria isolated during 92 mortality episodes, occurring mainly in Pacific oyster Crassostrea gigas, were identified by genotyping methods. It allowed us both to confirm the representativeness of Vibrio splendidus and Vibrio aestuarianus bacterial strains and to identify both a large number of Vibrio harveyi-related strains mainly detected during 2007 oyster mortality outbreaks and to a lesser extent bacterial strains identified as Shewanella colwelliana. Because metalloprotease has been reported to constitute a virulence factor in a few Vibrio strains pathogenic for C. gigas, several bacterial strains isolated in this study were screened to evaluate their pathogenicity in C. gigas spat by experimental infection and their ability to produce metalloprotease-like activity in the culture supernatant fluids. A high level (84%) of concordant results between azocaseinase activities and virulence of strains was obtained in this study. Because bacterial metalloprotease activities appeared as a common feature of pathogenic bacteria strains associated with mortality events of C. gigas reared in France, this phenotypic test could be useful for the evaluation of virulence in bacterial strains associated with such mortality episodes.

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The assessing of Pacific oyster (Crassostrea gigas) rearing performances by the IFREMER/REMORA network: method and first results (1993–98) in Brittany (France)

Cited by 15 publications

References 6 publications

Experimental shift in diet δ13C: A potential tool for ecophysiological studies in marine bivalves

Experimental shift in diet δ13C: A potential tool for ecophysiological studies in marine bivalves

The effects of environmental factors on survival, growth and biochemical composition of transplanted oysters (OstreaedulisLinnaeus, 1758) from Aegean Sea to southern Black Sea

A Large-Scale Epidemiological Study to Identify Bacteria Pathogenic to Pacific Oyster Crassostrea gigas and Correlation Between Virulence and Metalloprotease-like Activity

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