Suplementação de lisina e metionina em dietas com baixo nível protéico para o crescimento inicial do pacu, &lt;em&gt;Piaractus mesopotamicus&lt;/em&gt; (Holmberg)

Muñoz-Ramírez, A. P.; Carneiro, Dalton José

doi:10.4025/actascianimsci.v24i0.2343

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…Means calculated for protein efficiency ratio at the end of 48 days were lower than the ones found by Muñoz-Ramirez & Carneiro (2002), who observed protein efficiency ratio between 2.34 and 2.73 for juvenile pacu, and Fernandes et al (2004), who observed protein efficiency ratio around 3.2 to 2.92 for pacu fingerlings fed diets with different levels and sources of protein. Protein efficiency ratio was also calculated by Carneiro et al (1992), who subjected juvenile pacu to different stocking densities and feed with different protein levels.…”

Section: Parametersmentioning

confidence: 51%

“…Fernandes et al (2004), also estimated specific growth rate values higher than the ones obtained in this study, between 1.64 and 1.80%/day for pacu fingerlings, just like Ituassú et al (2005), who observed values of specific growth rate between 1.4 and 2.4%/day for juvenile pirarucu fed diets with variation of crude protein levels. Muñoz-Ramirez & Carneiro (2002) observed even higher values of specific growth rate, between 2.27 and 1.76%/day, for the initial stage of growth of pacu fed diets with different supplementations of lysine and methionine and low protein value.…”

Section: Parametersmentioning

confidence: 95%

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Morphometrical development of tambaqui (Colossoma macropomum, Cuvier, 1818) under different photoperiods

Mendonça¹,

Vidal²,

Polese³

et al. 2012

R. Bras. Zootec.

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-The experiment was performed with 160 tambaqui (Colossoma macropomum) with average weight 11.01±2.08 g and total length 7.8±0.18 cm. Fishes were kept in sixteen aquariums with 56 L of water at 29.1±0.4 o C of temperature, initial stocking density 1.97 g/L and constant aeration. The objective of this study was to assess the influence of photoperiod on fish performance. Treatments consisted of four photoperiods: T1 = 6 hours; T2 = 12 hours; T3 = 18 hours and T4 = 24 hours, with four replicates each. Fishes were fed twice a day with commercial extruded feed (28% of crude protein).The experiment was developed in closed circulation system, with volume of water renewal for each experimental unit equivalent to 40 times daily. Fish biometry was performed at the beginning of the experiment and at every 16 days, in order to follow the effects of treatments on juvenile development. Final weight, total length, standard length, height, feed intake, weight gain, feed conversion, survival, specific growth rate, protein efficiency rate and protein retention efficiency were assessed.Statistical analysis of variables was performed with application of the software SAEG version 9.1, for analysis of variance, regression analysis and Pearson correlation. Positive influence of photoperiod was observed for the studied variables in this study. The studied variables enhanced as the photoperiod increased, mainly between 15 and 22 hours. The photoperiod has significant influence upon growth traits of tambaqui (Colossoma macropomum).

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Section: Parametersmentioning

confidence: 51%

Section: Parametersmentioning

confidence: 95%

Morphometrical development of tambaqui (Colossoma macropomum, Cuvier, 1818) under different photoperiods

Mendonça¹,

Vidal²,

Polese³

et al. 2012

R. Bras. Zootec.

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“…The percentage of visceral fat is directly affected by the developmental phase; greater accumulation of visceral fat is observed with the increase in size . Muñoz-Ramírez and Carneiro (2002) reported fat visceral-somatic indexes between 2.8 and 2.8 in pacu fingerlings. Because this parameter is directly related to nutrient availability energy relationship between diets from different lipid sources (Abimorad et al, 2007) and concentration of existing carbohydrates (Baldan, 2008), it can be inferred that the diets provided to fish had a proper nutritional balance as no variations in the hepatosomatic index were not observed.…”

Section: Resultsmentioning

confidence: 99%

Níveis de proteína bruta em dietas para pacu (Piaractus mesopotamicus) com 150 a 400g cultivados em tanques-rede

et al. 2014

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Um factor limitante na produção de organismos aquáticos refere à formulação de dietas de baixo custo com fontes de proteínas que satisfaçam as necessidades nutricionais dos animais. Portanto, este estudo teve como objetivo avaliar o desempenho e o crescimento do pacu (Piaractus mesopotamicus) cultivado em tanques-rede no reservatório de Itaipu. O peso médio inicial dos peixes foi de 150,5 ± 2,1g os quais foram distribuídos aleatoriamente em 20 tanques-rede (100 peixes/tanque) alimentados com cinco níveis de proteína bruta (PB) (18,5; 20,7; 23,7; 25,6 e 28,3 %), três vezes ao dia até a saciedade aparente. Avaliou-se o crescimento, composição muscular e perfil hematológico. Observou-se feito quadrático (p0,05). A derivação das equações indicaram que o percentual exigido de PB na dieta para juvenis de pacu foi de 25,8 %. Portanto, recomenda-se que as dietas para esta espécie, nestas condições de cultivo, devem ser formuladas com aproximadamente 26 % de PB para assegurar melhores condições de desempenho e crescimento.

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“…Peixes alimentados com dietas purificadas ou semipurificadas, com a inclusão de elevados níveis de aminoácidos cristalinos (>20%), em geral apresentam crescimento inferior a peixes alimentados com dietas onde a fonte protéica é intacta (WILSON, 2002;. Esse crescimento inferior não foi observado no presente estudo, pois a TCE dos peixes foi superior àquelas observadas em outros trabalhos (MUÑOZ-RAMIREZ;ABIMORAD, 2008), mas inferior ao relatado por -GURREA et al, 2001;LUO et al, 2006;OLIVA-TELES, 2008) KHAN, 2004;DAIRIKI;CYRINO, 2007;ZHOU, X-Q. et al, 2007).…”

Section: Discussionunclassified

Exigências nutricionais de juvenis de pacu (Piaractus mesopotamicus Holmberg, 1887): proteína, energia e aminoácidos

Bicudo¹

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Nutritional requirements of juveniles pacu (Piaractus mesopotamicus Holmberg, 1887): protein, energy and amino acids Pacu, Piaractus mesopotamicus, a neotropical, omnivorous native characin, widely used in Brazilian aquaculture. However, some aspects of your nutrition are controversial or ignored. This work aimed at determining dietary protein, energy and amino acids requirements of juvenile pacu through the evaluation of performance, body composition and hematological parameters. In a first trial, pacu juveniles (15.5±0.4 g) were fed twice a day for 10 weeks until apparent saciety with diets containing crude protein (CP) from 22 to 38 % (intervals of 4%) and digestible energy levels among 2600 and 3400 kcal kg-1 (intervals of 200 kcal), in a totally randomized experimental design, 5 × 5 factorial scheme (n=3). Weight gain (WG) and specific growth rate (SGR) increased significantly with amount dietary CP. Nitrogen retention (NR) and protein efficiency ratio (PER) decreased (p<0.05) with increasing dietary protein at all tested levels of dietary energy. DE levels affected (p<0.05) whole body moisture, protein, fat, ash, gross energy and condition factor. Economic efficiency ratio was influenced by dietary protein (p<0.05) and digestible energy (p<0.05), and by interaction between the two factors. However, income was affected by dietary protein level (p<0.05) alone. Significant effect of treatments in hematological parameters were registered for mean corpuscular hemoglobin concentration, total plasma protein and plasma glucose. Crude protein requirements and optimum protein:energy ratio for weight gain of juveniles of pacu were 271 g kg-1 and 92.9 mg kcal-1 , respectively. All dietary crude protein and digestible energy levels studied did not pose harms to fish health. Dietary lysine requirement of juvenile pacu Piaractus mesopotamicus (4.3 g) was determined by feeding five isonitrogenous (32% crude protein) amino acid test diets containing casein, gelatin and Lcrystalline amino acids with graded levels of lysine (0.90, 1.17, 1.44, 1.69 and 1.96% of dry diet) for 74 days, three times a day until apparent satiation, to groups (n=4) of 18 fish in a totally randomized design trial. No mortality or nutritional deficiency signs were observed; reduced growth was recorded for fish fed diets with either the lower or the higher lysine contents. Final weight (FW), WG, SGR, feed efficiency (FE), PER, NR, proximate whole body composition, morphometry and hematology were affected (p<0.05) by dietary lysine concentrations. Seconddegree polynomial regression analysis of WG and PER data indicated dietary lysine requirement of 1.45, 1,51 and 1.43% of dry diet, respectively to WG, FE and PPV. Significantly higher lipid and protein contents values were obtained for whole body of fish fed the diets with 0.9 and 1.96% of lysine. Lysine requirement of juvenile pacu was determined as being 1.5% of dry diet.

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Suplementação de lisina e metionina em dietas com baixo nível protéico para o crescimento inicial do pacu, <em>Piaractus mesopotamicus</em> (Holmberg)

Cited by 5 publications

References 15 publications

Morphometrical development of tambaqui (Colossoma macropomum, Cuvier, 1818) under different photoperiods

Morphometrical development of tambaqui (Colossoma macropomum, Cuvier, 1818) under different photoperiods

Níveis de proteína bruta em dietas para pacu (Piaractus mesopotamicus) com 150 a 400g cultivados em tanques-rede

Exigências nutricionais de juvenis de pacu (Piaractus mesopotamicus Holmberg, 1887): proteína, energia e aminoácidos

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