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| Pichavant, Karine; Person, Jeannine. |
| The effects of hypoxia on growth, feed efficiency, nitrogen excretion, oxygen consumption and metabolism of juvenile turbot (120 g) were studied in a 45-day experiment carried out in sea water at 17.0 +/- 0.5 degrees C and 34.5 ppt salinity. Fish were fed to satiation at O-2-concentrations of 3.5 +/- 0.3, 5.0 +/- 0.3 mg l(-1) (hypoxia) and 7.2 +/- 0.3 mg l(-1) (normoxia). Both feed intake (FI) and growth were significantly lower under hypoxia than under normoxia, with no significant differences being observed between 3.5 and 5.0 mg O-2 l(-1). During the first 2 weeks of the experiment, FI was halved under hypoxic conditions, and there were large differences among treatments in feed conversion ratio (FCR), i.e., it was 3.2, 1.5, and 0.9 in turbot exposed to... |
| Tipo: Text |
Palavras-chave: Acid base status; Ion regulation; Nitrogen excretion; Oxygen consumption; Feed utilization; Growth; Hypoxia; Turbot. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/2000/publication-631.pdf |
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| Meyer,Paula Marques; Machado,Paulo Fernando; Coldebella,Arlei; Cassoli,Laerte Dagher; Coelho,Karyne Oliveira; Rodrigues,Paulo Henrique Mazza. |
| The objective of this study was to validate three different models for predicting milk urea nitrogen using field conditions, attempting to evaluate the nutritional adequacy diets for dairy cows and prediction of nitrogen excreted to the environment. Observations (4,749) from 855 cows were used. Milk yield, body weight (BW), days in milk and parity were recorded on the milk sampling days. Milk was sampled monthly, for analysis of milk urea nitrogen (MUN), fat, protein, lactose and total solids concentration and somatic cells count. Individual dry matter intake was estimated using the NRC (2001). The three models studied were derived from a first one to predict urinary nitrogen (UN). Model 1 was MUN = UN/12.54, model 2 was MUN = UN/17.6 and model 3 was MUN =... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cow; Milk urea nitrogen; Nitrogen excretion; Protein utilization. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500026 |
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| Freitas,Luiz Eduardo Lima de; Silva,Tarcila Souza de Castro; Fracalossi,Débora Machado. |
| ABSTRACT: The determination of nutritional requirements, based on diets administered in practice, considers physiological specificities and sustainability are essential to the development of suitable aquaculture technologies for novel fish species. The growth of jundiá (Rhamdia quelen Quoy and Gaimard) juveniles (31.54 ± 4.92 g) fed five diets comprising increasing levels of digestible protein (DP: 24, 29, 34, 39, and 44 %) and digestible energy (DE: 12.13, 13.39, 13.81, 14.64, and 15.06 MJ kg−1) with DP:DE ratios: 20, 22, 25, 27, and 29 g MJ−1, respectively, was evaluated. Each diet was fed to three groups of 25 fish for 75 days. Regression analysis showed that the different DP:DE ratios affected both growth and economic performance as well as excretion... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DP:DE; Nutritional requirements; Nitrogen excretion; Practical diets. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000700402 |
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| Santos, Graciene Conceição; Garcia, Edivaldo Antonio; Vieira Filho, Javer Alves; Molino, Andrea Britto; Pelicia, Kleber; Berto, Daniella Aparecida. |
| Aiming to assess isoleucine levels in low protein diets for laying Japanese quails, 648 quails of 182 days of age were distributed in experimental block design with six treatments and six replicates of 18 birds each. Treatments consisted of a basal level corresponding to 0.672% isoleucine and supplemented with isoleucine to the levels of 0.816, 0.960; 1.104; 1.248%. The experimental diets were compared to a control diet containing 20% CP. The parameters studied were: performance, egg quality, total solids and nitrogen in the excreta. There was a linear increase only for isoleucine intake with increasing levels of isoleucine in the diets. The comparison of mean values of each combination of isoleucine levels for diets with 16% CP with the control with 20%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.04.03.00-1 branched-chain amino acid; Performance; Nitrogen excretion; Egg quality. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/29533 |
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| Fraga,Alessandro Luís; Moreira,Ivan; Furlan,Antonio Claudio; Bastos,Alexandre Orio; Oliveira,Ricardo Pinto de; Murakami,Alice Eiko. |
| A trial was carried out to determine the lysine requirement for starting barrows fed on ideal protein concept-based diets. Thirty-two pigs from a commercial crossbred genetic group (CCGG, BW=15.9 ± 1.4 kg) and 32 pigs from a dam line one (DLGG, BW= 14.8 ± 1.0 kg) were used. Pigs were allotted to 4 treatments with diets containing increasing levels of total lysine (0.80, 1.00, 1.20 and 1.40%). Methionine+cystine, threonine and tryptophan were adjusted according to ideal protein profile. Data from performance, plasma urea nitrogen (PUN) and carcass composition were analyzed. CCGG showed higher daily feed intake, daily weight gain, PUN and protein:fat ratio in carcass, while DLGG showed higher fat carcass content and nitrogen retention. Fat content and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carcass composition; Crystalline amino acids; Nitrogen excretion; Nutrition; Lean meat. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100007 |
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