Consulta: subjectFacets:"Nutritional requirement"
Registros recuperados: 18
Data/hora: 12/06/2024 16:22:00

Biological, nutritional, and histochemical basis for improving an artificial diet for Bracon hebetor Say (Hymenoptera: Braconidae)
Provedor de dados: 82
Autores: Magro,Sandra R.; Dias,Alcides B.; Terra,Walter R.; Parra,José R.P.
The biology of Bracon hebetor Say (Hymenoptera: Braconidae) reared on fifth instars of Anagasta kuehniella (Zeller) (Lepidoptera: Pyralidae) (natural diet) and in vitro (artificial diet) was evaluated. Data on the number of instars, development time and food intake were collected, and histochemical tests were conducted to detect proteins and lipids in the parasitoid's digestive tract. The data disclosed differences that can help to improve artificial rearing of B. hebetor. B. hebetor had three instars in both diets, but the developmental time on the artificial diets was prolonged due to the increase in larval and pupal development times. Larvae grew faster on the natural host and required a lower food intake (2.7 µl) as compared to that required by the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological control; Fatty acid; Idiobiont; Nutritional requirement; Protein.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000200010

Description of amino acid and fatty acid content during initial development of Lophiosilurus alexandri (Siluriformes: Pseudopimelodidae), a carnivorous freshwater catfish
Provedor de dados: 83
Autores: Costa,Deliane Cristina; Takata,Rodrigo; Silva,Walisson de Souza e; Bessonart,Martin; Gadea,Juan Luis; Magnone,Larisa; Luz,Ronald Kennedy.
ABSTRACT Samples of eggs, newly hatched larvae (NHL), and larvae at the end of the lecithotrophic period (eight days after hatching) (LPL) of Lophiosilurus alexandri were collected to determine the amino acid and fatty acid profiles. Crude protein did not change throughout initial development and the concentration of lipids was highest in NHL. The content of the indispensable amino acids (IAA) isoleucine, leucine, and valine decreased in LPL, while in eggs and NHL they remained high and similar in value. The dispensable amino acids (DAA), such as aspartic acid, tyrosine, and glycine, increased in LPL, while alanine decreased. The percentage of neutral lipids increased in LPL. The saturated fatty acid content decreased during ontogeny, while monounsaturated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Embryonic development; Nutritional requirement; Pacamã.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000200215

Supplementation with arginine in the diet of Nile tilapia reared in net cages
Provedor de dados: 86
Autores: Fujimoto,Rodrigo Yudi; Santos,Rudã Fernandes Brandão; Pala,Gabriela; Gallani,Sílvia Umeda; Valladão,Gustavo Moraes Ramos; Morais,Gisele Cavalcante; Lee,James Tony; Sousa,Natalino da Costa; Cunha,Fernanda dos Santos; Maria,Alexandre Nizio; Carneiro,Paulo César Falanghe; Pilarski,Fabiana.
Abstract: The objective of this work was to evaluate the effect of dietary arginine concentrations on the health status of Nile tilapia (Oreochromis niloticus) cultivated in cages. The experiment was carried out in a completely randomized design with four treatments (2.3, 2.9, 3.5, and 4.1% arginine in dry matter) and three replicates, in 12 net cages of 8 m3, containing 4,000 sexually reverted tilapia (63±20 g, at 500 fish m-3). Fish productive performance and health were evaluated. Biochemical, hematological, and immunological parameters, as well as the morphological aspects of gills and liver, were evaluated. Arginine inclusion did not cause significant differences in fish growth performance. However, arginine supplementation at 3.5% concentration...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oreochromis niloticus; Biochemistry; Haematology; Histology; Nutritional requirement.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000101105

Macronutrient uptake and export in transgenic corn under two levels of fertilization
Provedor de dados: 86
Autores: Silva,Carine Gregório Machado; Resende,Álvaro Vilela de; Gutiérrez,Aarón Martínez; Moreira,Silvino Guimarães; Borghi,Emerson; Almeida,Gabriela Oliveira.
Abstract: The objective of this work was to evaluate macronutrient uptake and export by transgenic corn hybrids under medium and high fertilization levels. For each fertilization level, a randomized complete block design was carried out in the summer crop season, under no-tillage and supplementary irrigation, with four cultivars and four replicates. Plants were sampled throughout the entire cycle and separated into leaves, stalk, husk, cob, and grains for the determination of dry matter mass and accumulation of macronutrients in the different growth stages. Under the high fertilization level, a greater dry matter mass and nutrient uptake were observed, but grain yield was similar to that under the medium fertilization level. The uptake of N, P, Ca, Mg, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Fertilizer use efficiency; High productivity; Luxury consumption; Nutrient absorption; Nutritional requirement.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001201363

A hybrid model of uniform design and artificial neural network for the optimization of dietary metabolizable energy, digestible lysine, and methionine in quail chicks
Provedor de dados: 89
Autores: Mehri,M; Ghazaghi,M.
A uniform design (UD) was used to construct models to explain the growth response of Japanese quails to dietary metabolizable energy (ME), and digestible methionine (dMet) and lysine (dLys) under tropical condition. In total, 100 floor pens with seven birds each were fed 25 UD different diets containing 25 ME (2808-3092 kcal/kg), dMet (0.31-0.49% of diet), and dLys (0.91-1.39% of diet) levels from 7 to 14 d of age. A platform of artificial neural network based on UD (ANN-UD) was generated to describe the growth response of the birds to dietary inputs using random search. Artificial neural networks of body weight gain (BWG) and feed conversion ratio (FCR) were optimized using random search algorithm. The optimization the ANN-UD results showed that maximum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Quail chick; Nutritional requirement; Uniform design; Neural network.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000300013

Digestible Lysine on Live Performance of Chicken Type Naked Neck During the Starter Phase
Provedor de dados: 89
Autores: Oliveira,RG de; Pinheiro,SRF; Castro,MR de; Vieira,DJ; Pires,AV; Abreu,LRA de.
ABSTRACT The poultry market has changed due to a higher consumer interest on products with differentiated organoleptic characteristics, making of free-range broiler production a promising activity. This experiment was conducted to determine the digestible lysine requirements of Redbro Cou Nu male and female chickens during the starter phase (one to 21 days of age). Six hundred and thirty Redbro Cou Nu broilers were distributed into 30 pens (21 chickens/pen) according to a randomized complete design in a 5 x 2 factorial arrangement, consisting of five levels of digestible lysine and two sexes, with three replicates (pens) per treatments. Diets with increasing digestible lysine levels (8.1, 9.5, 10.9, 12.3 and 13.7 g of digestible lysine per kg of diet) were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acid; Feed conversion ratio; Ideal protein; Nutritional requirement.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000400483

Effects of Nutritional Levels on Performance, Carcass Characteristics and Nutrient Digestibility of Sexed Broilers
Provedor de dados: 89
Autores: Muñoz,JA; Suckeveris,D; Demuner,LF; Saccomani,APO; Silva,AL; Silva,RT; Faria Filho,DE; Faria,DE.
ABSTRACT The objective of this study was to evaluate the effects of dietary nutrient levels on performance, carcass yield, commercial cuts, digestibility and economical viability of broilers from 1 to 42 days of age. During the experiment, 180 COBB 500™ chicks were housed in metal batteries and subjected to a completely randomized design in a 2x3 factorial arrangement, of two sexes and three diets (male, female and mixed), totaling 6 treatments and 6 repetitions of 5 birds each. Data were subjected to statistical analysis and the means were compared using the Tukey test, at 5% probability. The results indicate the effect of sex on performance and commercial cuts, except for breast and thigh fillets, in which males and females showed similar results when...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Economic viability; Metabolizability; Nutrition; Nutritional requirement; Poultry.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000100053

Micronutrient and Silicon Uptake and Removal by Upland Rice Cultivars with Different Plant Architecture
Provedor de dados: 90
Autores: Crusciol,Carlos Alexandre Costa; Carmeis Filho,Antonio Carlos de Almeida; Fernandes,Adalton Mazetti; Alvarez,Rita de Cássia Félix.
ABSTRACT Upland rice cultivars manifest different nutritional demands. A field study was conducted to quantify the extraction, distribution, and removal of micronutrients and silicon by the upland rice cultivars. The experiment was arranged in a randomized complete block-split plot design. Plots consisted of three cultivars (Caiapó – traditional, BRS Primavera – intermediate, and Maravilha – modern) of upland rice. Split-plots consisted of plant samplings, which occurred at 39, 46, 55, 67, 75, 83, 92, 102, 111, 118, and 125 days after emergence (DAE). Up to the end of tillering (46 DAE), all cultivars exhibited low demand for most micronutrients and Si, and took up less than 24 % of the total B, Cu, and Si, but around 31 % of the total Zn. The period of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Nutrient accumulation; Uptake rates; Nutritional requirement.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100522

Deficiency symptoms and uptake of micronutrients by castor bean grown in nutrient solution
Provedor de dados: 90
Autores: Lavres Junior,José; Cabral,Cleusa Pereira; Rossi,Mônica Lanzoni; Nogueira,Thiago Assis Rodrigues; Nogueira,Neusa de Lima; Malavolta,Eurípedes.
Castor bean is a nutrient-demanding species, but there is still little information on its micronutrient requirements. The objectives of this study were to evaluate the effects of levels of B (2.5, 12.5 and 25.0 µmol L-1), Cu (0.05, 0.25 and 0.50 µmol L-1), Mn (0.2, 1.0 and 2.0 µmol L-1) and Zn (0.2, 1.0 and 2.0 µmol L-1) in a nutrient solution on plant B, Cu, Mn and Zn concentrations and uptake, vegetative growth and fruit yield of castor bean "Iris", grown in greenhouse. The experiment was arranged in a completely randomized block design with three replicates. The first deficiency symptoms were observed for B, followed by Zn, Cu and Mn. The main changes in the cell ultrastructure due to lack of B were thickening of the cell walls and middle lamellae,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutritional requirement; Ricinus communis L; Cell ultrastructure.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000100024

Growth and nutrient accumulation in the aerial part of red Pitaya (Hylocereus sp.)
Provedor de dados: 94
Autores: Lima,Denise de Castro; Mendes,Nouglas Veloso Barbosa; Corrêa,Márcio Cleber de Medeiros; Taniguchi,Carlos Alberto Kenji; Queiroz,Ronialison Fernandes; Natale,William.
Abstract  Knowledge on the amounts of nutrients accumulated by pitaya in its different development stages allows defining the periods in which the essential elements are most required, thus contributing to the elaboration of rational fertilization programs for the crop, reducing production costs. This study aimed to evaluate the growth and nutritional requirement of red pitaya, estimating the accumulation of macro and micronutrients by the plants and determining the periods in which the greatest accumulations occur, as well as the relative growth rate and the relative nutrient absorption rate. Pitaya seedlings were planted in pots containing Argissolo Vermelho-Amarelo Eutrófico (Ultisol) and grown in the open air. The experimental design was randomized...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mineral nutrition; Cactaceae; Nutritional requirement.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000502001

Calcium requirement and vitamin D supplementation in meat-type quail at second stage of growth
Provedor de dados: 96
Autores: Perine,Taynara Prestes; Marcato,Simara Márcia; Furlan,Antonio Claudio; Grieser,Daiane de Oliveira; Zancanela,Vittor; Stanquevis,Caroline Espejo; Benites,Mariani Ireni; Euzébio,Tainara Ciuffi.
ABSTRACT An experiment was conducted to determine the required levels of supplementary vitamin D and calcium in meat-type quail (Coturnix coturnix sp) between 15 and 35 days old. The experiment was a 4 × 4 factorial design with four levels of calcium: 0.42, 0.58, 0.74, and 0.90% and four levels of vitamin D: 1,000; 2,000; 3,000; and 4,000 IU. Body weight and body weight gain increased linearly and feed conversion showed some linear improvement due to increased levels of Ca and vitamin D. The increased vitamin D levels resulted in a linear increase in feed intake. Calcium and vitamin D requirements in meat-type quail between 15 and 35 days of age is greater or equal to 0.90% Ca and greater or equal to 4,000 IU of vitamin D, probably because the experiment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bone resistance; Nutritional requirement; Quail nutrition.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016001100655

Effect of dietary amino acid composition from proteins alternative to fishmeal on the growth of juveniles of the common snook, Centropomus undecimalis
Provedor de dados: 96
Autores: Silvão,Cristiane Freire; Nunes,Alberto Jorge Pinto.
ABSTRACT This study investigated the effect of dietary amino acid composition from proteins alternative to fishmeal on the growth performance of the common snook, Centropomus undecimalis. Fish of 10.79±0.71 g (n = 150) were stocked in 15 shaded outdoor tanks of 1 m3. The basal diet contained 643.4 g kg−1 salmon byproduct meal (SML) and 200.0 g kg−1 soy protein concentrate (SPC). Two other diets replaced 39 and 29% of the SML with poultry byproduct meal (PBM, 170.1 g kg−1) and SPC (334.9 g kg−1), respectively. Fish were fed twice daily for 84 days under 32±1 g L−1 water salinity and 27.3±0.9 °C temperature. Final survival (99.5±2.6%) was unaffected by dietary treatment. Snook grew slower (0.24±0.03 and 0.27±0.04 vs 0.35±0.06 g day−1) and achieved the lowest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acid; Fishmeal; Fish nutrition; Nutritional requirement.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000700569

Macromineral requirements by beef cattle under pasture supplementation
Provedor de dados: 96
Autores: Sales,Maykel Franklin Lima; Paulino,Mário Fonseca; Valadares Filho,Sebastião de Campos; Porto,Marlos Oliveira; Couto,Victor Rezende Moreira; Paulino,Pedro Veiga Rodrigues.
The objective of this work was to determine macromineral requirements by Zebu steers grazing Brachiaria decumbens supplemented with concentrate. It was used 24 non-castrated steers, at an average age of 7 months and at initial average weight 180 kg. Eight control animals were slaughtered for determining initial body composition. The 16 remaining animals were divided in four four-animal plots, in a complete random design. Each plot received mineral mixture or supplements at the levels 0.75; 1.50 or 2.25 kg/animal/day. The right half-carcass of eight animals, two per group, was dissected in muscle, fat and bones and all body constituents were weighted for determination of empty body weight and body composition. Net requirements of calcium and phosphorus for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Nutritional requirement; Phosphorus; Supplementation; Zebu.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000200026

Dietary lysine requirement of adult lambari ( Astyanax altiparanae ) (Garutti and Britski, 2000)
Provedor de dados: 96
Autores: Campelo,Daniel Abreu Vasconcelos; Salaro,Ana Lúcia; Ladeira,André Luis Fialho; Moura,Lorena Batista de; Furuya,Wilson Massamitu.
ABSTRACT A 90-day feeding trial was conducted to estimate the dietary lysine requirement of adult lambari ( Astyanax altiparanae ), based on growth performance, whole-body composition, muscle development, and aspartate aminotransferase (AST) and alanine aminotransferase (ALT) activities. Six isoproteic (345.0 g kg−1) and isoenergetic (19.51 MJ kg−1) diets were formulated, and crystalline L-lysine was added to obtain diets with lysine concentrations of 12.13, 13.31, 15.36, 18.79, 19.92, and 23.02 g kg−1 dry diet. Female adult lambari (n = 480; weight of 4.96±0.02 g) were distributed into 24 (70 L) aquaria and fed the experimental diets six times daily. Fish fed 12.13 to 19.92 g kg−1 lysine showed increased weight gain and percent weight gain, and fish from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aminoacid; Carcass quality; Fish nutrition; Lysine; Nutritional requirement.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100103

Levels of available phosphorus and calcium for broilers from 8 to 35 days of age fed rations containing phytase
Provedor de dados: 96
Autores: Cardoso Júnior,Adimar; Rodrigues,Paulo Borges; Bertechini,Antônio Gilberto; Freitas,Rilke Tadeu Fonseca de; Lima,Renato Ribeiro de; Lima,Gustavo Freire Resende.
Two experiments using Cobb broiler chicks from 8 to 35 days of age were carried out to evaluate the effect of reducing levels of calcium and available phosphorus in diets supplemented with 500 ftu phytase/kg on the performance of the birds, the content of ashes in the tibia, the metabolizable energy of the diet, and the metabolizability of the dry matter and crude protein. It was used 1,404 broiler chicks in the experiment 1 to evaluate feed intake, weight gain, food conversion and percentage of the ashes in the tibia. In the experiment 2, simultaneously carried out with experiment 1, a total of 390 birds were transferred to a metabolism room to determine the metabolizable energy and metabolizability of the dry matter and crude protein. It was used in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Enzyme; Minerals; Nutritional requirement.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000600011

Critical review: cholesterol and fat-soluble vitamins on shrimp feeding
Provedor de dados: 22
Autores: Lima, Rodrigo Barbosa; Figueiredo-Lima, Denise Fontana.
Four types of poly unsaturated fatty acids (PUFA) are essential for all shrimp species, linoleic (LOA, 18:2n-6), alfa-linolenic (ALA, 18:3n-3), eicosapentaenoic (EPA, 20:5n-3) and docosahexaenoic (DHA, 22:6n-3) acids. Moreover, the arachidonic acid (ARA, 20:4n-6), even when present, seems to be, in crustaceans, not so important or yet dispensable. It is relevant knowing that cholesterol as much as PUFA are not well absorbed when not followed by a substantial amount of lecithin, reaching 5% of the ration. The sum of PUFA reaches around 3% of the diet, even varying according to the species, stage and ration type. For Penaeus monodon a complex mathematic model was formulated in order to describe the relationships between the requirements of the cited PUFA....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carotenoids; Cholesterol; Fat-soluble vitamins; Nutritional requirement; Phospholipids; Syndromes.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/13996

Applying precision feeding to improve the nitrogen efficiency of swine production: a review of possible practices and obstacles
Provedor de dados: 65
Autores: Monteiro,Alessandra Nardina Trícia Rigo; Bertol,Teresinha Marisa; Kessler,Alexandre de Mello.
ABSTRACT: Optimizing nutrient efficiency is essential in order to increase sustainability of pig production systems, especially where the growing demand for food must be met at an affordable cost, without compromising environmental resources. To make this happen, it is necessary to develop efficient methods to accurately estimate the nutritional requirements of animals, as well as develop equipment and systems that allow for applying such expertise in the production system. Estimating the nutritional requirement of pigs through mathematical models, considering several factors that can impact the requirement, is a key factor to reduce the environmental load from pig production. Likewise, feed formulation and feeding programs, can help to achieve this. In...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diet formulation; Environmental impact; Modelling; Nutritional requirement; Pig.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000700653

Functional anatomy and intestinal morphometry of bullfrog tadpoles subjected to a dietary regime with commercial feeds
Provedor de dados: 64
Autores: Seixas Filho,José Teixeira de; Mello,Silvia Conceição Reis Pereira; Cardoso,Fabiane Toste; Souza,Rodrigo Otavio Lopes de.
ABSTRACT One of the main hindrances to frog farming is the lack of knowledge of the nutritional requirements of tadpoles that allow nutritionists to formulate the ideal diet for this phase, reducing operational costs and providing homogeneity to the shoal. This study aimed at evaluating the anatomy of the digestive tract and morphometry of the midgut and hindgut of bullfrog (Lithobates catesbeianus) tadpoles to provide subsidies for nutritionists to make adjustments in the balancing of suitable diets for this species. The population of tadpoles that received the dietary regimen named DR3, which consisted of a fortnight increase of the dietary protein levels (from 32 to 45% of CP) for 60 days, showed the best results regarding weight gain, survival rate,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amphibians; Feed and feeding; Frog nutrition; Nutritional requirement; Protein.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000400464