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Registros recuperados: 7
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Action de l'érythromycine et de l'acide oxolinique sur le déveloloppement larvaire de la coquille St Jacques Pecten maximus ArchiMer
Robert, Rene; Nicolas, Jean-louis; Conan, Rony.
For lack of antibiotics, King scallop larviculture faces high mortalities. In the experimental mollusc hatchery of Argenton (Brittany, France), the presence of a vibrio, Vibrio pectinicida, associated with the stocks seems to be responsible for this low survival rate. As prophylactic methods are difficult to implement in the current structures (water sterilization, egg decontamination, isolation of the stocks), the addition of chloramphenicol is the only solution to protect the stocks. However, the use of this antibiotic, considered as dangerous for man, has been prohibited in animal production throughout the whole of Europe since 1994. The action of two other antibiotics, the erythromycine and the oxolinic acid, has been searched for in Pecten maximus...
Tipo: Text Palavras-chave: Acide oxolinique; Erythromycine; Antibiotiques; Coquille St Jacques; Pecten maximus L.; Développement larvaire.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/publication-6199.PDF
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Croissance de différents lots de coquille Saint-Jacques Pecten maximus en culture sur le fond dans la Rade de Brest ArchiMer
Buestel, Dominique; Gerard, Andre; Guenole, Annie.
Six batches of king scallop juveniles of different origins and obtained either by collection in their natural habitat (Saint-Brieuc, Scotland, Ireland), or by hatchery production in Brest in 1981, 1982, 1983, have been sown, at a size of 3 cm, in the roadsted of Brest between 1977 and 1983. Their growth, strongly linked to the evolution of the temperature, is well-described by a model, including a sinusoidal modulation, by Von Bertalanffy. The growth of the scallops collected in Saint-Brieuc, Scotland and Ireland, differentiates from that of the individuals from their original area and shows similarities with that of the scallops produced in Brest. Consequently, there must be an adaptation of the growth to the environmental conditions of the roadsted of...
Tipo: Text Palavras-chave: Pectiniculture; Croissance; Pecten maximus L.; Coquille Saint Jacques.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/acte-6189.PDF
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Estimation d'un stock naturel de coquille Saint Jacques par une méthode combinant les dragages et la plongée. Traitement des résultats par une méthode géostatistique ArchiMer
Buestel, Dominique; Dao, Jean-claude; Gohin, Francis.
The efficiency of the fishing drags in the Saint Brieuc Bay, Brittany, has been determined through the analysis of the tracks left on the seabed. The results, which focus mostly on the age class n°2 (2.5 years), show that the efficiency and the damages caused by the drags vary heavily according to the nature of the seabed. For soft bottoms, the average efficiency is 67 % and the global damage is 2 %. Concerning hard bottoms, the values are respectively 30 % and 17 %. These efficiency results combined with those of a dragging expedition in a set sector of the Saint-Brieuc Bay enable a direct assessment of the abundance. A result treatment method deriving from the geostatistical theory is used: it takes into account the spatial structure of the king scallop...
Tipo: Text Palavras-chave: Coquille Saint Jacques; Plongée; Dragage; Pecten maximus L.; Estimation stocks.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-6536.pdf
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Induction de la métamorphose de la coquille Saint-Jacques Pecten maximus L. par des dérives de la tyrosine extraits de l'algue Delesseria sanguinea Lamouroux ou synthétiques ArchiMer
Cochard, Jean-claude; Chevolot, L.; Yvin, J.c.; Chevolot-magueur, A. M..
King scallop Pecten maximus L. larvae reared in stagnant sea water generally show a delayed metamorphosis. These larvae do not seem to look for a specific fixation substrate, but introduced Delesseria sanguinea Lamouroux aqueous extracts bring about a significant rise in the metamorphosis rates and the mortalities according to the concentration of extracts in the water. A series of experiments enabled the identification of the inducing agent of Delesseria sanguinea extracts: jacaranone. This product, obtained through synthesis, shows a similar activity. The optimal concentration is 0.5 mg.l-1 (3.10- 6M); for higher concentrations, the monitored drop in the metamorphosis rate is caused by an increase in the mortality rate...
Tipo: Text Palavras-chave: Adrénaline; L PODA; Jacaranone; Métamorphose; Induction; Pecten maximus L.; Coquille Saint Jacques.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/acte-6194.PDF
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Note sur l'évolution comparée des coquilles Saint-Jacques d'origine différente en Bretagne Nord ArchiMer
Dao, Jean-claude; Buestel, Dominique; Halary, C..
Different batches of king scallops (Pecten maxinus) have been monitored at two sites in Northern Brittany after their seeding at a size of 25-35 cm. These batches are a combination of indigenous scallops, hatchery juveniles with spawners from Brest, and Irish and Scottish juveniles. Their evolution has been monitored over several years. This document presents the preliminary results of the comparison of their growth, mortality and seasonal behaviour during maturation.
Tipo: Text Palavras-chave: Mortalité; Croissance organisme; Physiologie; Pecten maximus L.; Coquille Saint Jacques.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-6541.pdf
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Prégrossissement du naissain de coquille Saint-Jacques Pecten maximus (L.) en rade de Brest - Résultats obtenus en 1983 ArchiMer
Buestel, Dominique; Guenole, Annie; Mingant, Christian.
In 1983, the pre-grow-out in the roadsted of Brest of 1.5m king scallop maximU6 post larvae from 1 to 5 mm lead to the production of 250,000 juveniles of a size comprised between 27 and 31 mm. The culture conditions have been particularly unfavourable in June with an infestation by the drilling worm Polydora sp and the starfish Asteria rubens, and in July when important mortalities and a stopping of the growth have been observed as well as the presence in the plankton of large quantities of dinoflagellates (most certainly toxic). Some experiments showed that the sensitivity of the scallops to those different mortality factors is proportional to the size of the farm.
Tipo: Text Palavras-chave: Prégrossissement; Elevage; Pecten maximus L.; Coquille Saint Jacques.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-6539.pdf
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Production artificielle de naissain de coquilles Saint-Jacques Pecten maximus (L.) : Analyse des facteurs affectant la croissance larvaire ArchiMer
Cochard, Jean-claude; Gerard, Andre.
The analysis of the Pecten maximus larval productions carried out between 1982 and 1986 in the framework of the repopulating program of the roadsted of Brest demonstrated the existence of a number of factors affecting larval growth in hatcheries: - Larval growth shows important seasonal fluctuations. It is minimal in February-March (3 to 4 µm.D-1) and maximal in June (6 to 8 µm.D-1). The growth of larvae from conditioned spawners does not differ from that of larvae from mature genitors collected in their natural habitat. Growth is favoured by an unknown factor present in sea water and held with a filtration of 0,2 µm. - The growth of the larvae cultivated in slack water in flat bottom ponds is higher than that of the larvae cultivated in bubbling water in...
Tipo: Text Palavras-chave: Larve; Ecloserie; Croissance organisme; Coquille Saint Jacques; Pecten maximus L.; Production.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/acte-6534.pdf
Registros recuperados: 7
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