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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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Effect of feeding time on digestibility, growth performance and protein metabolism in the rainbow trout Oncorhynchus mykiss: interactions with dietary fat levels ArchiMer
Bolliet, Valérie; Cheewasedtham, Chonlatee; Houlihan, Dominic; Gelineau, Anne; Boujard, Thierry.
The effect of feeding time was studied in rainbow trout fed different dietary levels of fat. Fish were fed either 1 h after light on in the morning or 1 h after light off in the evening with a low energy diet (LE, 6 % lipid) or a high energy diet (HE, 23 % lipid). Regardless of the diet, apparent digestibility and post prandial protein synthesis were higher in fish fed in the morning than in those fed at the beginning of the night. In fish fed the LE diet in the morning, growth performance and nutrient retention efficiency tended to be higher than in those fed at the beginning of the night. In contrast, fish fed the HE diet in the morning had lower protein growth rate, protein content and protein retention efficiency than those fed in the evening. These...
Tipo: Text Palavras-chave: Protein metabolism; Digestibility; Feeding time; Dietary fat level; Aquaculture; Métabolisme protéique; Digestibilité; Heure d'alimentation; Taux de lipides alimentaires; Aquaculture.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/publication-543.pdf
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Variations saisonnières in situ de la production et de la composition des biodépots de trois mollusques estuariens (Mytilus edulis, Crassostrea gigas, Crepidula fornicata) ArchiMer
Deslous-paoli, Jean-marc; Sornin, Jean-marc; Heral, Maurice.
The biodeposition was quantified on the field with sediment traps. All over the year, the biodeposition was the lowest for Crepidula fornicata. Mytilus edulis rejected more biodeposits during winter, and Crassostrea gigas during spring and autumn. The percentage of organic matter sonsumed and digested was higher during summer. The constituttive elements of the digested organic matter was not always the same, all over the year. The energy content of the digest fraction was higher in spring. For Mytilus edulis the ration intake was higher in winter and spring, related with the gametogenetic ans spawning period. An analysis of the mineral constutents of the natural food was made.
Tipo: Text Palavras-chave: Crepidula fornicata; Crassostrea gigas; Mytilus edulis; Digestibility; Biodeposition; Crepidula fornicata; Crassostra gigas; Mytilus edulis; Digestibilité; Biodéposition.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/publication-2691.pdf
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Voluntary feed intake, nitrogen and phosphorus losses in rainbow trout (Oncorhynchus mykiss) fed increasing dietary levels of soy protein concentrate ArchiMer
Medale, Francoise; Boujard, Thierry; Vallee, Frédéric; Blanc, Denise; Mambrini, Muriel; Roem, Arjen; Kaushik, Sadasivam.
High energy extruded diets were formulated to contain the same level of protein supplied either by soy protein concentrate (SPC) or fish meal. Three experiments were performed in order to measure voluntary feed intake and feed waste, faecal losses and soluble losses of nitrogen and phosphorus in rainbow trout (average body weight: 100 g). Voluntary feed intake and growth performance of fish fed with demand feeders were not different when diets contained 0, 50 or 75 % SPC instead of fish meal. Total replacement of fish meal by SPC led to a significant decrease in feed intake and resulted in poor growth. This was partly due to methionine deficiency in the SPC based diet. With the addition of crystalline DL-methionine in the diets, an improvement of feed...
Tipo: Text Palavras-chave: Digestibilité; Excrétion; Azote; Phosphore; Protéine de soja; Ingestion volontaire; Truite arc-en-ciel; Digestibility; Excretion; Nitrogen; Phosphorus; Soy protein; Voluntary feed intake; Rainbow trout.
Ano: 1998 URL: https://archimer.ifremer.fr/doc/1998/publication-871.pdf
Registros recuperados: 5
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