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Registros recuperados: 16
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Diseases in mollusc hatcheries and their paraedox in health management ArchiMer
Berthe, Franck.
Global molluscan aquaculture production is continuously increasing, dominated by five species, among which the Pacific cupped oyster, Crassostrea gigas, predominates. Hatchery production is accompanying this increase to assist consistent availability of juveniles for restocking, fishery enhancement, genetic improvements as well as for species diversification. Hatchery development contributes significantly to the demand for international transfers of live molluscs; a consequence of which pathogen transfer via transfer of live molluscs is currently recognised as a major cause of epizootic disease outbreaks. Diseases are a primary constraint to mollusc aquaculture growth and sustainability, severely impacting socioeconomic development in many countries....
Tipo: Text Palavras-chave: Mollusca; Crassostrea gigas; Risks; Mollusc culture; Husbandry diseases; Hatcheries; Disease control.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/acte-3289.pdf
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Efecto de la densidad de siembra sobre el crecimiento y supervivencia de Nodipecten nodosus (Bivalvia: Pectinidae) en un nuevo arte de cultivo OceanDocs
López-Navarro, Johann; Gómez-León, Javier; Castellanos-Romero, Claudia; Acosta-Ortíz, Ernesto.
Como un aporte para determinar la factibilidad biológica y tecnológica del cultivo de Nodipecten nodosus en el Caribe colombiano, entre abril y noviembre de 2007 se evaluó el efecto de dos densidades de cobertura (30 y 50 %) sobre su crecimiento y supervivencia. En jaulas suspendidas en el mar a 5 m de profundidad se colocaron juveniles entre 60 y 65 mm de longitud. Se realizaron mediciones quincenales de la longitud de la concha y de la supervivencia. De igual manera se registró la temperatura, salinidad, seston total y materia orgánica particulada para determinar la relación presentada con estos factores; N. nodosus alcanzó una longitud de 84.7 y 87.9 mm a 30 y 50 % de densidad, espectivamente. Los tratamientos (30 y 50 %) no difirieron en la...
Tipo: Journal Contribution Palavras-chave: Growth; Survival; Density; Mollusc culture; Mollusc culture; Growth; Survival; Density; Http://aims.fao.org/aos/agrovoc/c_4896; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7538; Http://aims.fao.org/aos/agrovoc/c_2186.
Ano: 2010 URL: http://hdl.handle.net/1834/3775
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Effects of age and environment on the summer mortality in cupped oyster Crassostrea gigas during the first two years ArchiMer
Degremont, Lionel; Boudry, Pierre; Soletchnik, Patrick; Bedier, Edouard; Ropert, Michel; Samain, Jean-francois.
Three successive generations were produced between 2001 and 2003 to assess to what extent genetic variability exists for survival in juvenile oysters Crassostrea gigas. For each generation, two groups were selected for their high ("R" for resistant) and low ("S" for susceptible) survival. Significant differences in mortality were observed during the first year in Riviere d'Auray (RA) (Brittany-France). However, low and similar mortality were observed for both groups, with no significant difference between groups in the first and second generation in this site, where the first summer is the critical, sensitive period with a clear age effect. In Baie des Veys (BDV) (Normandie-France), where mortalities usually mainly affect adults, mortality between groups,...
Tipo: Text Palavras-chave: Crassostrea gigas; Spat; Spatial variations; Survival; Rearing; Mollusc culture; Marine molluscs; Environmental factors; Nursery grounds; Mortality causes; Biological age; Aquaculture techniques.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/acte-3385.pdf
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El ostión de mangle. OceanDocs
Baisre, J. A..
Especie marina de importancia económica, que habita en las aguas marinas cubanas así como tambiçen en el litoral del Mar Caribe, y, desde Yucatán hasta Venezuela. Se identifican las principales zonas ostrícolas en Cuba, el ciclo de vida, las pesquerías históricas desde 1935 hasta el 2000, el cultivo y la recolección. Fotos e imágenes apoyan el instructivo texto.
Tipo: Journal Contribution Palavras-chave: Mollusc culture; Mollusk fisheries.
Ano: 2002 URL: http://hdl.handle.net/1834/5051
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Fijación y crecimiento del ostión de mangle Ostrea columbiensis (Hanley) 1946 a nivel de cultivo OceanDocs
Yoong, F.; Reinoso, B..
The present study was carried out in samples of Ostrea columbiensis (Hanley) taken from the estero ”Las Alforjas”, during de period between march-december of 1989. Three stations were selected in the estero, in order to observe the fixation, growth and survival of the larvae in special collectors designed by the authors. The percentage of fixation in the station 1 was 25,8%, in the station 2, 37,8% and in the station 3, 36,4%. The larvae oyster got fixed, preferably, by the external face of the collector (big valve) in a percentage of 64,3, while on the external face this percentage was 35,7%. The average height of the oysters during the whole period of study was 52 mm, with a monthly increment of 5,2 mm. The percentage of the oysters survival was 84,4%....
Tipo: Journal Contribution Palavras-chave: Ostrea columbiensis; Mollusc culture; Growth; Larval development; Survival; Mollusc culture; Growth; Survival; Http://aims.fao.org/aos/agrovoc/c_4896; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7538.
Ano: 1993 URL: http://hdl.handle.net/1834/3053
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Infectious pathology in mollusc and shrimp hatcheries ArchiMer
Mialhe, Eric.
Development of aquaculture has been linked to zootechnical mastering of larval production in hatcheries. Regular and excessive use of antibiotics (antifungal or antibacterial) may thus also be reduced, permitting to limit release of these products in sea-water and, consequently, avoiding progressive selection of resistant-strains.
Tipo: Text Palavras-chave: Viruses; Infectious diseases; Epidemiology; Pathogens; Bacterial diseases; Pathology; Larval development; Mollusc culture; Shrimp culture.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1487.pdf
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Influence of turbulence and turbidity on growth and survival of laboratory-reared bivalve larvae ArchiMer
Seaman, Matthias; His, Edouard; Keskin, Mehmet; Reins, Torsten.
Laboratory-reared larvae of mussels (Mytilus galloprovincialis ) were incubated with and without sediment in a novel turbulence-producing machine. The sediments used were fine silt from the Gironde Estuary and from the German Wadden Sea. Larvae incubated in turbulence without sediment, and in suspended sediment concentrations similar to in situ conditions had growth rates which did not vary significantly from those of the controls. The growth rates of larvae incubated in 5 to 20 g/l of sediment were reduced by 20 to 50%. Survival was lower in larvae incubated with sediments than in turbulent and non-turbulent controls, but it was not correlated with sediment concentration. The results indicate that the mechanical effects of turbulence and turbidity on...
Tipo: Text Palavras-chave: Controlled conditions; Environmental factors; Growth; Mollusc culture; Rearing; Survival; Turbidity; Mytilus galloprovincialis.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00038/14902/12228.pdf
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La conchyliculture francaise. 3. L'ostreiculture et la mytiliculture ArchiMer
Marteil, Louis.
Data is given on the reproduction, growth and culture of oysters. The methods used against oyster predators are described.
Tipo: Text Palavras-chave: Predator control; Mollusc culture; Shellfish culture.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/1979/publication-1797.pdf
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Large-scale microalgae production for nursery rearing of marine bivalves OMA
De Pauw, N.; Verboven, J.; Claus, C..
The feasibility of large-scale bloom induction of nutritionally suited natural phytoplankton species, to feed a semi-industrial nursery of edible shellfish, built on the Belgian coast, was tested. The outdoor microalgal production unit consisted of four tanks of 100 m² surface each (two of 1 m depth and two of 0.5 m depth), equipped with different mixing devices. The cultures were run as chemostats in which seawater was enriched with commercial inorganic N, P and Si fertilizers. Depending on the season, between 5-10 and 80% of the culture volume could be harvested daily, with algal densities ranging from 50,000 to 500,000 cells per ml. By manipulation of operational parameters such as detention time, nutrient levels and nutrient ratios (N: Si: P), unsuited...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Algal culture; Marine aquaculture; Mass culture; Mollusc culture; Rearing; Chaetoceros; Chlorella; Nitzchia; Phaeodactylum; Skeletonema.
Ano: 1983 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3395
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Mass culture of algae: a bottleneck in the nursery culturing of molluscs OMA
Persoone, G.; Claus, C..
The controlled culture of larvae of molluscs of commercial importance (oysters, clams, etc.) till spatfall implies the daily production of substantial volumes of suitable species of microscopic algae. For economic reasons, industrial mollusc hatcheries cannot, however, upscale the very expensive indoor algal production to fulfill the increasing food demands of the growing spat. As too early transplantation of the postlarvae to the natural environment results in various technological and biological problems, the intermediate semi-controlled "nursery" culturing of the spat up to a few centimeters in length is presently more and more preconized. The different technologies utilized for nursery culturing are reviewed with special emphasis on the major problem:...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Algae culture; Mollusc culture.
Ano: 1980 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3691
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Nursery culturing of bivalve spat in heated seawater OMA
Claus, C.; Van Holderbeke, L.; Maeckelberghe, H.; Persoone, G..
The controlled nursery culturing of mollusc spat produced to date by millions in commercial hatcheries is an intermediate step in mollusc farming which is receiving more and more attention. Different technologies for nursery culturing indoors as well as outdoors have been developed at different places.The principles are always basically the same and consist of culturing postlarvae of a few millimeters to a size of a few centimeters in densities as high as possible in specific devices containing seawater which is eventually enriched with live unicellular algae or inert foods. This paper reports on the first results obtained in Belgium in an indoor experimental nursery with spat of <i>Ostrea edulis, Crassostrea gigas</i> and <i>Venerupis...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mollusc culture; Spat; Bivalvia.
Ano: 1981 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3402
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Presence of Salmonella in shellfish in the Thau lagoon ArchiMer
Angeli, J.
After a general presentation of the Thau lagoon together with its geographic location, socio-economic activities linked to shellfish culture and fishing, this paper investigates the health conditions of the shellfish harvesting areas. I he influence of heavy rainfall following a prolonged drought period is underlined as a determining factor of the momentary bacterial pollution in the harvesting areas, leading to a suspension of sales based on analyses relying solely on the detection of faecal coliforms. As of 1989, bacteriological monitoring was reorganized in the form of a data collection network taking into consideration environmental assessments of water quality as well as shellfish hygiene in order to protect consumer health. Its extension to the...
Tipo: Text Palavras-chave: Salmonella; Bivalvia; Surveillance and enforcement; Mollusc culture; Health and safety; Epidemiology.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1589.pdf
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Prophylactic strategies and zootechnic measures, recent advances ArchiMer
Grizel, Henri.
The spread of major diseases of molluscs around the world and the increase of transfers need the development of adapted prophylactic strategies and the increase of research in epidemiology, immunology and genetics. The prophylactic strategies must be based on common laws with the establishment of a list of declarable pathogens, with basic sampling rules (sample size, frequency, definition of geographical areas) and with reglementation of the internal transfers. Moreover, specific adapted diagnosis should be developed to increase the sanitary control performance (e.g. ELISA test, DNA probe, cell culture). In the case of an infectious disease the epidemiology studies should be concerned, the relationship between the culture techniques and the disease, the...
Tipo: Text Palavras-chave: Bonamia ostreae; Mollusc culture; Aquaculture techniques; Pathology; Immunology; Genetics; Epidemiology; Fish diseases; Disease control.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1483.pdf
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Status and future of molluscan pathology in North America ArchiMer
Elston, R.
Serious diseases have plagued the North American oyster industry for at least 75 years. These include Malpeque Bay disease, M.S.X. disease, perkinsiosis, nocardiosis, oyster velar virus disease and others. Some of these diseases have proven intractable since they are caused by infectious agents which have not yet been transmitted in the laboratory or which cannot yet be cultivated outside of the host animal. The increased importance of aquaculture of these species and the advent of modern molecular technologies in biology have provided both the impetus and the means to now advance the science of molluscan pathology.
Tipo: Text Palavras-chave: North America; Viruses; Viral diseases; Mollusc culture.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1475.pdf
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Trends in nursery rearing of bivalve molluscs OMA
Claus, C..
Nursery rearing of bivalve molluscs, as the intermediate step between the controlled production of larvae in commercial hatcheries and the growout in the wild, is a practice which is receiving more and more attention in mollusc farming. The purpose of nursery rearing of bivalves is to culture cultchless spat of a few millimeters in size, up to 1-2 cm, in a minimum of time, in densities as high as possible, and at minimal costs and risks. In the last decade various technologies for nursery culturing, indoors as well as outdoors, have been developed at different places, ranging from suspended culture in the open sea to controlled onshore culture in upwelling cylinders. This paper reviews the different systems developed until now, with special emphasis on one...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Experimental rearing; Mollusc culture; Bivalvia.
Ano: 1981 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3401
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Use and production of microalgae as food for nursery bivalves OMA
De Pauw, N..
The nutritional value of various foods and diets for juvenile bivalves is reviewed and commented. From all foods tested specific microalgues seem to be the most suited for young bivalves. Presently, serious alternatives for replacing living algae by inert, artificial feeds are practically inexistent, though research efforts are made in this direction. The various microalgae production-systems used for feeding juvenile bivalves are also reviewed. A literature survey and the COST inquiry held in 1979 by our laboratory revealed that nearly all commercial enterprises involved in nursery rearing of bivalve molluscs in Europe utilize natural phytoplankton as food. Culturing of the postlarvae is performed either <i>in situ</i> (in the sea) or in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Algae culture; Food; Mollusc culture; Bivalvia.
Ano: 1981 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3406
Registros recuperados: 16
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