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Comparison of brown trout (Salmo trutta) reared in fresh water and sea water to freshwater rainbow trout (Oncorhynchus mykiss) .1. Growth and nitrogen balance ArchiMer
Dosdat, Antoine; Metailler, Robert; Desbruyeres, Elisabeth; Huelvan, Christine.
Brown trout and rainbow trout (average weight 100 g) were reared in fresh water at 12 degrees C under the same conditions before transfer of brown trout to sea water, in order to compare nitrogen utilisation in the two species. Apparent protein digestibility (ADC), nitrogen (ammonia and urea) excretion, protein productive value (PPV) and actual observed nitro en mass balance were determined. Rainbow trout raised in fresh water had a higher growth rate (1.1 vs 0.8%. d(-1)), better food conversion ratio (0.7 vs 1.0), better ADC (91 vs 85%) and PPV (45 vs 35%) and lower ammonia excretion rates than brown trout reared in fresh water. Transferring brown trout to sea water induced lower PPV (30%) and ammonia and urea excretion. Salinity did not modify metabolic...
Tipo: Text Palavras-chave: Truite commune; Truite arc-en-ciel; Excrétion; Ammoniaque; Urée; Digestibilité; Croissance; Rétention protéique; Rainbow trout; Brown trout; Excretion; Ammonia; Urea; Digestibility; Growth; Protein productive value.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00188/29885/28342.pdf
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Comparison of brown trout (Salmo trutta) reared in fresh water and sea water to freshwater rainbow trout (Oncorhynchus mykiss): II. Phosphorus balance ArchiMer
Dosdat, Antoine; Metailler, Robert; Desbruyeres, Elisabeth; Huelvan, Christine.
Brown trout and rainbow trout (average weight 100 g) were reared in fresh water at 12 degrees C under the same conditions before transferring brown trout to sea water, in order to compare phosphorus utilisation in both species. Apparent phosphorus availability, orthophosphate excretion and phosphorus accretion in the fish were directly determined. Thus, actual phosphorus mass balance was built. Rainbow trout raised in fresh water had a higher phosphorus retention coefficient (maximum 50 %) than brown trout reared in fresh water (maximum 45 %). Transferring brown trout to sea water induced a reduction in phosphorus retention (maximum 39 %), Orthophosphate excretion, ranging 7-20 mg phosphorus per kg wet weight per day, represented 10-20 % of ingested...
Tipo: Text Palavras-chave: Oncorhynchus mykiss; Salmo trutta; Excrétion; Digestibilité; Phosphore; Oncorhynchus mykiss; Salmo trutta; Excretion; Digestibility; Phosphorus intake.
Ano: 1998 URL: https://archimer.ifremer.fr/doc/1998/publication-876.pdf
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Definition of scientific basis for the development of an overall aquaculture masterplan for South Africa - Report of the mission in South Africa from 9 to 15 February 1998 - Project definition and detailed workplan for 1998 ArchiMer
Dosdat, Antoine; Fuchs, Jacques; Mazurie, Joseph; Paquotte, Philippe; Mariojouls, Catherine.
After the decision taken by the French - South African committee to reduce the budget and the duration of all the selected proposaIs of the first call, Rhodes University and Ifremer decided to revise their joint proposaI and organized a meeting in South Africa in february 1998. A multidisciplinary team composed of economists and specialists in different fields of aquaculture spent on week in South Africa (9 and 15 february 1998) with Prof Hecht and his team in Rhodes University, in order to precise the proposaI and define detailed actions to be carried out within the next two years. The present report summarises the principal conclusions of the survey in term of general approach, detailed methodologies and planning for 1998.
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Ano: 1998 URL: http://archimer.ifremer.fr/doc/00153/26463/24571.pdf
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Economie maritime en Bretagne : changeons de regard ArchiMer
Dosdat, Antoine; Moulinier, Herve.
Mieux connaître est l’étape essentielle, pour mieux comprendre, décider et agir, donc éclairer les politiques publiques et privées. Cet éclairage qui se doit d’être dynamique et dans la durée, permet de focaliser les énergies, les investissements et d’anticiper les transformations. Mieux connaître c’est aussi la condition nécessaire pour faire connaître. Faire connaître les pépites et fleurons de l’économie maritime de la Bretagne, les success stories, les champs nouveaux d’innovation, les domaines d’excellence et de croissance dans la droite ligne de la spécialisation intelligente. Avant-propos Faire connaître au-delà des frontières nationales pour attirer les investisseurs, attirer et retenir les talents, pour éduquer à la mer nos jeunes concitoyens, et...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00220/33154/31654.pdf
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Effect of chronic ammonia exposure on growth of European seabass (Dicentrarchus labrax) juveniles ArchiMer
Lemarie, Gilles; Dosdat, Antoine; Coves, Denis; Dutto, Gilbert; Gasset, Eric; Person, Jeannine.
Chronic effects of ammonia were studied in juvenile seabass, Dicentrarchus labrax (mean weight= 11 g), exposed for 63 days to eight stable ammonia concentrations, ranging from 0.24 to 0.90 mg l(-1) unionised ammonia nitrogen (UIA-N), respectively, from 6.1 to 22.3 mg l(-1) total ammonia nitrogen (TA-N). Temperature (21.8 degreesC), pH (8.0), salinity (37.0 ppt), and oxygen concentration (over 80% saturation at the outlet) were maintained constant. Fish were fed using a self-feeder device, and they were starved during the last 8 days. Mortality of 28.9 and 42.6% occur-red within the first 8 days at the two highest UIA-N concentrations, respectively, 0.90 and 0.88 mg l(-1). From days 0 to 55, a 1.8-fold increase in weight gain was observed under the 0.90-mg...
Tipo: Text Palavras-chave: Plasma ammonia; Growth; Seabass; Chronic toxicity; Ammonia.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/publication-628.pdf
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Effect of chronic exposure to ammonia on growth, food utilisation and metabolism of the European sea bass (Dicentrarchus labrax) ArchiMer
Dosdat, Antoine; Person, Jeannine; Coves, Denis; Dutto, Gilbert; Gasset, Eric; Le Roux, Annick; Lemarie, Gilles.
The chronic effects of exposing sea bass (average initial weight 100 g) to ammonia in water at 22 degreesC were first evaluated over a 61-day period (period 1, P1) during which nine different groups were submitted to nine ambient ammonia levels ranging from 0.014 to 0.493 mg 1(-1) NH3-N (0.53-16.11 mg 1(-1) total ammonia nitrogen (TA-N)) and fed using self-feeders. At the end of P1, the fish were starved for 10 days (P2). Their recovery capacity was tested over 43 days (P3) after which the exogenous ammonia supply was stopped in all treatments and the fish were allowed to feed. After 20 days of exposure a highly significant effect of ammonia was evident from the decrease in feeding activity, voluntary feed intake (VFI) and specific growth rate (SGR), and...
Tipo: Text Palavras-chave: Sea bass; Self feeding; Compensatory growth; Chronic toxicity; Ammonia.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/publication-595.pdf
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First rearing attempts of pollack, Pollachius pollachius ArchiMer
Suquet, Marc; Petton, Bruno; Normant, Yvon; Dosdat, Antoine; Gaignon, Jean-louis.
Tipo: Text
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00188/29888/28339.pdf
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Impact de la pisciculture marine intensive sur l'environnement : contribution à la modélisation de l'utilisation de l'azote par le turbot ArchiMer
Dosdat, Antoine; Tetu, N.; Metailler, Robert; Huelvan, Christine; Desbruyeres, Elisabeth; Le Delliou, Herve.
Ce document présente une étude visant à déterminer le flux de nutriments produits par un élevage de turbots en conditions contrôlées. Les paramètres d'excrétion et de production de fèces ont été abordés en fonction des quantités d'aliment ingéré, en même temps que l'excrétion d'azote corporel. L'étude montre que le turbot est un animal plus économe que la truite arc-en-ciel pour ce qui concerne l'utilisation des protéines. Ceci est explicable par des particularités physiologiques. L'utilisation de modè les "salmonidés" pour l'estimation de l'impact environnemental des piscicultures marines est donc déconseillée.
Tipo: Text Palavras-chave: Pisciculture marine; Environnement; Turbots; Métabolisme.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00429/54101/55431.pdf
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La pisciculture marine en France ArchiMer
Dosdat, Antoine; Gaignon, Jean-louis; Fuchs, Jacques; Harache, Yves; Lacroix, Denis; Paquotte, Philippe; Thouard, Emmanuel.
Tipo: Text
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00344/45564/45162.pdf
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L'aquaculture francaise en bref ArchiMer
Dosdat, Antoine; Kempf, Marc; Merceron, Michel; Paquotte, Philippe.
Aquaculture in France is characterised by great species diversity. Furthermore, traditional activities (farming of marine shellfish and freshwater fish) coexist with still-developing recent ones (marine fish farming, new pratices in shellfish rearing, etc.). Traditional cultures are the main contributors to the tonnage produced and employment generated. Another noticeable point is the importance of the western part of the country, which carries the main part of the production (> 80 %): the Channel Atlantic coast for shellfish, and nearby rivers for freshwater salmonid farming. On the Mediterranean coast, marine fish farming of bass and bream, as well as shellfish production by new methods (mussels on longlines in open waters), are developing. Important...
Tipo: Text Palavras-chave: MED; France ANE; France France Environmental protection Coastal zone Species diversity Aquaculture.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/1993/acte-1326.pdf
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L’internationalisation du système productif alimentaire breton ArchiMer
Dosdat, Antoine; Gohin, Alexandre; Jaouen, Jacques.
Si l'insertion de certaines industries (automobile,électronique, aéronautique...) dans un environnement mondialisé semble uneévidence, l'internationalisation du système productif alimentaire (agriculture,pêche et aquaculture, industries agroalimentaires) est sans doute parfoisméconnue ou sous-estimée, car plus difficilement perceptible. Cette globalisation des marchéset l'accroissement des échanges européens et internationaux ont participé audéveloppement du système productif alimentaire breton, mais ils ont euégalement pour conséquence l'instauration de nouvelles règles du jeu sur lesmarchés, pouvant parfois fragiliser certaines filières du territoire. Ainsi,les crises récentes rencontrées notamment dans le secteur de la volaille, de laproduction porcine...
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Ano: 2013 URL: http://archimer.ifremer.fr/doc/00220/33155/31658.pdf
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PISCICULTURE - ENVIRONNEMENT : Les bases de physique et de biologie marine en soutien à la législation des ICPE en Méditerranée. ArchiMer
Deslous-paoli, Jean-marc; Dosdat, Antoine; Peruzzi, Stefano.
The demand for sea products is going only to increase in the years to come. Capture fisheries will not be enough (80 million tons / year) to supply and fish farming (38 million tons of products o fthe sea in 1998) already stands out to itself as a dominating actor. One of the missions of Ifremer in the field of the fish farming is the harmonious development of the field by mastering possible impacts due to rearing. The Institute developed competence in immunology, physiology, genetics, pathology and food. This study report of impact on the useful bases of physic and biology to elaborate the impact studies in marine fish farming, within the framework of the french law on the Classified Installations for Environmental Protection (ICPE), confined in the...
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Ano: 2002 URL: http://archimer.ifremer.fr/doc/00059/17022/14526.pdf
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Pisciculture marine et environnement en France: specificite par rapport a l'eau douce ArchiMer
Kempf, Marc; Merceron, Michel; Dosdat, Antoine.
French marine fish farming deals with several species: sea bass, sea bream, turbot, trout and salmon. In 1992, 20 M fingerlings and 2600 t of fish were produced, for a turnover of 165 MFF: This very technical activity is developing, but still fragile and risky. Environment protection regulation applied to marine fish farming directly inspires from that in force in fresh water, which comes from the industry: i.e. the so-called "classified installation" regulation, concerning activities likely to produce polluting effluents. It does not really adapt to diluted effluents, like fish growing ones, and still less to marine farming; this is true for parameters like biological oxygen demand (BOD) and chemical oxygen demand (COB) and, to a lesser extent, for...
Tipo: Text Palavras-chave: MED; France ANE; France Suspended particulate matter Legislation Production management Environmental protection Fish culture.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/1993/acte-1331.pdf
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Pisciculture marine intensive et environnement ArchiMer
Kempf, Marc; Merceron, Michel; Dosdat, Antoine.
Farmed sea fish production is at the moment relatively undeveloped in France (20 million alevins, 2,600 tonnes of fish, 165 million francs), but it has growth potential that is yet to be exploited. Installation plans are eliciting a great variety of reactions depending upon the areas of the shoreline. The various objections, often passionate, generally rely upon environmental arguments. And yet, objective data that would make it possible to evaluate the latter are in large part lacking. The government, accustomed to regulating fresh water, lacks benchmarks and experience in the marine environment. Property developers need basic outlines and data to build their cases. Scientists are called upon, in a national and international plan, to help aquafarming grow...
Tipo: Text
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/publication-2628.pdf
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Report of the ICES working group on environmental interactions of mariculture (WGEIM) - 2002 ArchiMer
Black, E.; Bodoy, Alain; Davies, Ian; Dosdat, Antoine; Ervik, Arne; Haya, Kats; Mckindsey, Chris; Mcmahon, Terry; O'Beirn, Francis; Rosenthal, Harald; Silvert, Bill; Waller, Uwe.
Tipo: Text
Ano: 2002 URL: http://archimer.ifremer.fr/doc/00041/15177/12514.pdf
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