Consulta: subjectFacets:"Nutritional requirements"
Registros recuperados: 46
Data/hora: 13/06/2024 04:01:29

Técnicas de manejo reprodutivo em bovinos de corte.
Provedor de dados: 14
Autores: VALLE, E. R. do; ANDREOTTI, R.; THIAGO, L. R. L. de S.
Na pecuária de corte, a exploração comercial do sistema de cria se constitui na fase do sistema produtivo, que envolve a criação e o manejo não só das matrizes bovinas e seus respectivos bezerros ate a desmama, mas também das novilhas de reposição e dos touros. Esse sistema tem por objetivo a produção de bezerros desmamados que representa a maior fonte de receita do criador. A venda de vacas descartadas e outros animais, apesar de contribuírem para a produção total, e uma fonte de receita marginal, mas também muito importante para o criador. Portanto, a viabilidade do sistema vai depender da eficácia e eficiência com que são utilizados os meios disponíveis para a otimização da produtividade. O escopo deste trabalho foi o de apresentar e discutir as...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Bovino de corte; Estação de monta; Sanidade; Breeding seasouns; Nutritional requirements; Management.; Acasalamento; Eficiência Reprodutiva; Exigência Nutricional; Prenhez; Reprodução; Desmama.; Animal health; Copulation; Beef cattle; Reproduction; Pregnancy; Reproductive performance; Weaning.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/325118

Microparticulate feeds for Penaeid larvae
Provedor de dados: 5
Autores: Kanazawa, A.
The mass production of penaeid larvae still depends on live foods such as diatoms, Chlorella and Artemia . However, it requires much facilities, maintenance expenses, and labor to produce a desired amount of life foods safely and constantly. Also, the nutritive value of planktonic organisms is occasionally variable and this makes the use of live food for mass culture restrictive. Therefore, it is necessary to develop microparticulate diets as a substitute for live foods to further increase the productivity of seed for shrimp culture.
Tipo: Text
Palavras-chave: Penaeus japonicus; Nutritional requirements; Food organisms; Fish meal; Proteins; Nutritive value; Survival; Food; Diets; Feeding; Feed; Shrimp culture.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1463.pdf

Vitamin requirements of juvenile penaeid shrimp
Provedor de dados: 5
Autores: Conklin, D.
The results of supplementing crustacean feeds with vitamins are examined specifically from the standpoint of shrimp culture. Micro-nutrients selected for discussion include: water-soluble vitamins of the B-complex, choline and inositol, vitamin C and the fat-soluble group of vitamins: A, D, E and K. Ways in which utilization of vitamins and ultimately dietary demand are altered by physiological state, conditions of culture, as well as factors which impact on feed levels, are explored.
Tipo: Text
Palavras-chave: Penaeidae; Malacostraca; Diets; Marine crustaceans; Nutrients (mineral); Nutritional requirements; Juveniles; Feed; Vitamins.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1469.pdf

Two examples of nutritional pathology related to vitamins E and C deficiencies
Provedor de dados: 5
Autores: Baudin Laurencin, F; Messager, J; Stephan, Gwendal.
Symptoms recalling a nutritional pathology and more precisely a process of lipid peroxydation were observed during the last years in seabass Dicentrarchus labrax and other fishes cultured in tropical marine condition, Ocyurus chrysurus and Lutjanus analis . They included dark coloration, skin ulceration, lethargy, anorexy, emaciation. Histological examinations showed hepatic fatty degenerative lesions, pancreatitis, muscular degeneration and retinal atrophy. Additional vitamins E and C in the food suppressed that pathological symptoms. The previously evoked clinical or histological signs were not achieved in spite of an increase of the level of hepatic, muscular or blood malondialdehyde and of the conjugated dienes of the perivisceral fat. In the same...
Tipo: Text
Palavras-chave: Lutjanus analis; Ocyurus chrysurus; Dicentrarchus labrax; Pisces; Marine fish; Diseases; Nutrient deficiency; Vitamin C; Vitamin E; Vitamin deficiencies; Nutritional requirements; Dietary deficiencies; Deficiency diseases.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1501.pdf

Marine finfish pathology: Specific problems and research in the French West Indies
Provedor de dados: 5
Autores: Gallet Desaint Aurin, D; Raymond, J; Vianas, Viviane.
The finfish species reared in marine intensive conditions in the French Caribbean Islands are imported (European seabass, American red drum and Oreochromis hybrids) or local (Carangids and Lutjanids) species. The European seabass (Dicentrarchus labrax ) is susceptible, during its first year of life, to a contagious disease characterized by whirling and hyperexcitability, associated with severe lesions of the brain, viral particles being pointed out in the damaged nervous cells.
Tipo: Text
Palavras-chave: Growth; Hatcheries; Nutrient deficiency; Nutritional requirements; Pathology; Parasitic diseases; Fish culture.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1478.pdf

Production of live prey for marine fish larvae
Provedor de dados: 5
Autores: Kraul, S.
Tropical marine fish larvae vary in their requirements for live planktonic food. Selection of live prey species for culture depends on larval size and larval tolerance of water quality. This report describes some of the cultured prey species, and their uses and limits as effective food for fish larvae. Methods are presented for the culture of phytoplankton, rotifers, copepods, and other live feeds.
Tipo: Text
Palavras-chave: Brine shrimp culture; Diets; Prey selection; Food organisms; Feeding; Growth; Rearing; Nutritional requirements; Fish larvae; Marine fish; Tropical fish.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1443.pdf

Energy-protein management by some warmwater finfishes.
Provedor de dados: 5
Autores: Luguet, P; Moreau, Y.
If warmwater finfish protein requirements as level in diet is low, absolute intake per day is similar to those of coldwater species. But relation of this requirement with specific growth rate differs for strictly warmwater fishes as Tilapias. Analysis of partition between protein and non-protein energy retention shows that these species with Clarias make a better use of non-protein energy provided and consequently improve their protein retention. Better carbohydrate digestibility and metabolism are propounded as part of the explanation.
Tipo: Text
Palavras-chave: Clarias; Oreochromis mossambicus; Oreochromis aureus; Oreochromis niloticus; Tilapia; Cichlidae; Pisces; Nutritional requirements; Digestibility; Diets; Proteins; Metabolism; Carbohydrates; Nutrition; Feeding; Growth rate.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1424.pdf

Influence du taux de proteines sur la croissance ponderale de Palaemon serratus (Pennant) elevee au laboratoire
Provedor de dados: 5
Autores: Campillo, Albert; Luquet, P.
The quantitiative requirements for protein have been determined in P. serratus reared from the post-larval stage to the 4th month. It appears that the apparent optimum percentage of protein in the diet is a minimum of 60%. At the 8th month, the mean wt of prawn reared with the best artificial diet (diet IV) is only 49% of the wt of shrimp reared with the digestive gland of Patella as a diet. The prawns reared to 4th month on a low-protein diet then reared on a natural diet until the 8th month, show important compensatory growth. However, the prawns do not achieve the wt of the control population, their average wt representing only 16% of the controls.
Tipo: Text
Palavras-chave: Crangon crangon; Penaeus japonicus; Homarus vulgaris; Palaemon serratus; Nutritional requirements; Growth; Proteins; Artificial feeding; Crustacean culture; Laboratory culture; Rearing.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-2029.pdf

Review and current status of the aquaculture potential for the mahimahi, Coryphaena hippurus
Provedor de dados: 5
Autores: Kraul, S.
The mahimahi, Coryphaena hippurus , has excellent potential for aquaculture due to its fast growth (2 kg at 6 months, 9 kg at 1 year), good food conversion efficiency (30%, wet weight), high fecundity with natural captive spawns (200,000 eggs/female/2 days year round for a 1 year old female), and high price (US$ 9.00/kg wholesale in Hawaii).
Tipo: Text
Palavras-chave: Copepoda; Rotifera; Coryphaena hippurus; Coryphaenidae; Pisces; Artificial feeding; Diets; Spawning; Fingerlings; Females; Eggs; Food; Food conversion; Hatcheries; Nutritional requirements; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1473.pdf

Mineral requirement of Penaeids
Provedor de dados: 5
Autores: Piedad-pascual, F.
Marine shrimps absorb minerals from their aquatic environment aside from the minerals that come from the food they eat. Thus, the dietary requirement of shrimps for certain minerals will depend on the amounts and availability of these minerals in the aquatic environment. Dietary sources for growth may be necessary due to losses during moltings.
Tipo: Text
Palavras-chave: Penaeus californiensis; Penaeus monodon; Penaeus japonicus; Penaeidae; Malacostraca; Juveniles; Moulting; Feed efficiency; Survival; Growth; Phosphorus; Calcium; Diets; Shrimp culture; Nutritional requirements.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1454.pdf

Protein requirements of Penaeid shrimp.
Provedor de dados: 5
Autores: Kanazawa, A.
Proteins are indispensable nutrients for growth and maintenance of live of all animals. The optimum protein levels in diets for shrimps are different among the various species. Squid meal is an effective protein source for many penaeids. The effects of dietary protein, lipid, and carbohydrate levels on the growth and survival of larvae of Penaeus japonicus were examined by feeding trials using purified diet with carrageenan as a binder. As a result, the effects of protein levels on growth and survival of P. japonicus larvae varied with dietary carbohydrate levels but not dietary lipid levels.
Tipo: Text
Palavras-chave: Penaeus japonicus; Malacostraca; Marine crustaceans; Amino acids; Larvae; Survival; Carbohydrates; Diets; Nutritional requirements; Proteins; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1485.pdf

Nutrition of the seabass Lates calcarifer
Provedor de dados: 5
Autores: Cuzon, Gerard; Chou, R; Fuchs, Jacques.
The Primary Production Department of Singapore (PPD) studies covered the weaning of seabass from fingerlings stage onwards and the dietary protein requirement of early grow-out fish. Dietary protein requirement of early grow-out seabass was demonstrated to be between 40-50%, at dietary lipid level of 12%, using fishmeal protein. Nevertheless fish growth was significantly higher with trashfish feed, but apparent protein retention was significantly better with formulated feed.
Tipo: Text
Palavras-chave: Lates calcarifer; Fry; Nutritional requirements; Biochemistry; Food absorption; Growth rate; Fish meal; Seed (aquaculture); Dietary deficiencies; Fingerlings; Lipids; Proteins; Diets; Pellet feeds.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1425.pdf

Définition d'un modèle d'élevage larvaire intensif pour la daurade Sparus auratus
Provedor de dados: 5
Autores: Ounais-guschemann, Nadia.
This study defines rearing parameters for mass products of 30-day old post larvae. Continuous lighting (600 lux) optimizes the predatory activity and suppresses the feeding rhythm. For 4-5 mm larvae (15 days), food ingestion slows down if the prey concentration in the tank is below 5 rotifers/ml, while there is no such threshold for 6-7 mm larvae (22 days). The rotifer Brachionus plicatilis , between 100 and 200 mu m, is an adequate initial prey, it can be replaced by Artemia salina for 7-8 mm larvae (30 days). It is observed that free amino acids and essential fatty acids contents have a prominent role in larvae growth; docosahexaenoic acid (C22:6n-3) content could be determined. Finally, the development of the swim bladder is facilitated by the renewal...
Tipo: Text
Palavras-chave: Sparus auratus; Pisces; Marine fish; Environmental diseases; Fatty acids; Amino acids; Controlled conditions; Juveniles; Culture tanks; Growth; Light effects; Nutritional requirements; Fish larvae; Syndrome de paroi; Nutrition; Alimentation; Lumière; Inflation primaire de la vessie natatoire; Sparus auratus; Elevage larvaire intensif; Poisson.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/these-1679.pdf

L'aquaculture des crevettes, role de la nutrition
Provedor de dados: 5
Autores: Guillaume, Julien.
Shrimp and prawn aquaculture is developing fast and amounts presently to 8% of world consumption. It concerns mainly various species of penaeids and is done with different techniques where feeding plays a variable role. This role is discussed both in the case of more or less extensive farming and in the case of intensive farming. The lack of knowledge in the field of nutrition itself is emphasized as well as the importance of feed technology both for juvenile foods and larval microcapsules or microparticles.
Tipo: Text
Palavras-chave: Penaeidae; Malacostraca; Artificial feeding; Nutritional requirements; Feeding; Animal nutrition.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-1408.pdf

Early weaning of marine fish larvae onto microdiets: Constraints and perspectives
Provedor de dados: 5
Autores: Person, L.
Weaning small sized marine fish larvae at first feeding directly onto compound pellets is still difficult, while good results can be obtained when used in combination with live prey or when a prefeeding period on live prey is provided up to a size of about 2-3 mg. Microdiets are generally well ingested as their acceptability and visual detection may be improved using feeding activators and increasing good perception contrast. In theory, food may be processed to have a correct nutritional balance, selection of high digestible components is very important as larval digestive system is not fully functional during the first 2 or 3 weeks of life.
Tipo: Text
Palavras-chave: Hatching; Fatty acids; Amino acids; Nutritional requirements; Feeding behaviour; Stomach; Digestive system; Enzymes; Digestion; Physiology; Diets; Pellet feeds; Feeding; Fish larvae.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1422.pdf

Reference diet for crustaceans: Principle of experimentation.
Provedor de dados: 5
Autores: Castell, J.
Feeding trials were conducted with over 22 different crustacean species to compare the potential use of two diets as Standard Reference Diets (SRD) in crustacean research. The two diets (BML 81 S, a casein/albumin based formula developed at the University of California, Bodega Marine Laboratory, and HFX CRD 84, a crab protein concentrate based diet formulated at the Canadian Department of Fisheries and Oceans Halifax Laboratory) were about equal in performance for most species tested. Though neither diet was an ideal SRD, the HFX CRD 84 formulation based upon a purified protein of marine origin was accepted as the interim SRD for use in aquatic crustacean studies.
Tipo: Text
Palavras-chave: Astacus astacus; Penaeus orientalis; Homarus americanus; Crustacea; Rearing; Carbohydrates; Lipids; Proteins; Experimental research; Feeding experiments; Nutritional requirements; Diets.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1503.pdf

Effects of nutritional requirement of live food organisms on growth and survival of barramundi/seabass Lates calcarifer (Bloch) larvae.
Provedor de dados: 5
Autores: Rimmer, M; Reed, A.
Larvae of barramundi (Lates calcarifer ) reared intensively in some Australian hatcheries have suffered periodic high mortalities which have been ascribed to nutritional deficiencies in the live food organisms used, particularly deficiencies of polyunsaturated fatty acids. Barramundi larvae reared in an experimental system and fed on four diets, representing combinations of supplemented and unsupplemented rotifers (Brachionus plicatilis ) and supplemented and unsupplemented brine shrimp (Artemia salina ). Supplementation of rotifers and brine shrimp with a commercially available microencapsulated diet increased the levels of several polyunsaturated fatty acids in the food organisms.
Tipo: Text
Palavras-chave: Lates calcarifer; Brine shrimp culture; Growth; Intensive culture; Fatty acids; Feeding; Mortality; Hatcheries; Rearing; Food organisms; Nutritional requirements; Diets; Larvae; Survival.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1421.pdf

Evaluación de la harina de calamar en dietas para juveniles de Tortuga carey (Eretmochelys imbricata)
Provedor de dados: 20
Autores: Pelegrín, E.; Alvarez, S.; Galindo, J.; Regueira, E.
Un diseño experimental completamente aleatorizado en condiciones controladas de laboratorio se desarrolló durante 89 días, con el objetivo de conocer el efecto sobre el crecimiento y otros parámetros nutricionales de la harina de calamar en dietas para tortuga carey Eretmochelys imbricata. Se emplearon juveniles de 28.7 ± 5.28 g de peso inicial promedio y 6.5 ± 0.43 cm de largo inicial promedio del caparazón. Se evaluaron cuatro dietas prácticas con 0, 5, 10 y 15% de harina de calamar. Los animales que se alimentaron con las dietas que contenían harina de calamar presentaron los mejores resultados en cuanto a ganancia en peso y largo final, difiriendo significativamente (P&lt;0.05) con los que no consumieron este ingrediente. Los mejores valores del índice...
Tipo: Proceedings Paper
Palavras-chave: Fish meal; Diets; Proteins; Juveniles; Turtle culture; Nutritional requirements; Turtle culture; Fish meal; Juveniles; Proteins; Nutritional requirements; Http://aims.fao.org/aos/agrovoc/c_8022; Http://aims.fao.org/aos/agrovoc/c_2925; Http://aims.fao.org/aos/agrovoc/c_25393; Http://aims.fao.org/aos/agrovoc/c_6259; Http://aims.fao.org/aos/agrovoc/c_5277.
Ano: 2006
URL: http://hdl.handle.net/1834/1885

Valor del pepino de mar y perspectivas de desarrollar su cultivo en Cuba
Provedor de dados: 20
Autores: Pelegrín Morales, E.; Alvarez Capote, J. S.
Los pepinos de mar u holoturias son animales que presentan un particular  interés por su alto valor nutricional, medicinal, ecológico y comercial. Poseen  un elevado contenido de proteína, minerales y polisacáridos indispensables  para la nutrición humana. Son inhibidores de algunos tipos de cáncer y tienen  bioactivos útiles en la elaboración de fármacos. Son recicladores de nutrientes,  evitando la acumulación  de materia orgánica en descomposición. En el  mercado presentan  una gran demanda, con  precios de alrededor de 100.00  USD/Kg según la especie, razón por la que algunas de las poblaciones  naturales están sobre explotadas.  A nivel internacional se tiene conocimiento  del cultivo de varias especies de pepino de mar. En Cuba, comenzó en 1999 la...
Tipo: Preprint
Palavras-chave: Sea cucumber fisheries; Aquaculture; Nutritional requirements; Ecological sciences.
Ano: 2012
URL: http://hdl.handle.net/1834/4514

Análisis espacio-temporal del estado nutricional de larvas de anchoíta Engraulis anchoita. Relación con las características hidrográficas y la disponibilidad de alimento
Provedor de dados: 20
Autores: Díaz, M.V.
Nutritional condition studies allow the assessment of physiological state of each larva and thus, the establishment of favourable nursery areas which provide better survival and growth. In the present work, morphometrical, histological and biochemical techniques were employed to assess nutritional condition of anchovy, Engraulis anchoita, larvae captured in the Argentine Sea. Its results were complemented with oceanographic data and information about zooplankton abundances, both prey and predators of anchovy larvae. Anchovy larvae abundance and distribution would be mainly determined by physico-chemical variables. Even though no significant differences were found in larval nutritional condition among the studied areas, larval condition was slightly better...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Nutritional requirements; Morphometry; Histology; Hydrography; Nursery grounds; Fish larvae; Nutritional requirements; Hydrography; Nursery grounds; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_5277; Http://aims.fao.org/aos/agrovoc/c_3727; Http://aims.fao.org/aos/agrovoc/c_25438.
Ano: 2010
URL: http://hdl.handle.net/1834/3548

Requerimientos nutricionales de juveniles de camarón blanco (Litopenaeus schmitti): evaluación de dietas prácticas
Provedor de dados: 20
Autores: Galindo, J.; Fraga, I.; de Arazoza, M.; Alvarez, S.; Ramos, D.; González, R.
Con el objetivo de determinar el efecto de diferentes relaciones proteína/energía (P/E), sobre el crecimiento de juveniles de Camarón Blanco Litopenaeus schmitti , mediante la utilización de dietas prácticas, se desarrolló un diseño experimental completamente aleatorizado, a escala de laboratorio, durante 59 días. Se evaluaron 12 dietas con diferentes niveles de inclusión de proteínas, lípidos y carbohidratos. El crecimiento fue mayor en los camarones que se alimentaron con las dietas que contenían 33 y 28% de proteína, alcanzando su valor máximo en el intervalo de la relación P/E comprendido entre 105-127 mg de proteína/Kcal. Los indicadores nutricionales evaluados, también fueron mejores para aquellos organismos alimentados con las dietas de alto...
Tipo: Proceedings Paper
Palavras-chave: Nutritional requirements; Prawn culture; Diets; Animal growth; Juveniles; Nutritional requirements; Juveniles; Http://aims.fao.org/aos/agrovoc/c_5277; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2002
URL: http://hdl.handle.net/1834/1880

Índice de refracción de la  hemolinfa Vs tasa peso total/largo total en la estimación de la condición nutricional de langostas Panulirus Argus
Provedor de dados: 20
Autores: Lopeztegui, A.; Suárez, G.; Capetillo, N.; Alzugaray, R.
Las diferentes metodologías descritas para la estimaciónde la condición nutricional en langostas,presentan particularidades que constituyen ventajas o desventajas según las circunstancias en que se apliquen.El objetivo de estetrabajofueestimarlacondiciónnutricionaldelangostas Panulirusargus mediantedosmetodologías,elíndicederefraccióndelahemolinfa(IRH)ylatasa pesototal(PT)/largototal(LT)=K,ydeterminarlafactibilidaddeemplearunau otramediantelacomparacióndelosresultados.SetrabajóenlaregióndelGolfo deBatabanó,Cuba,conlangostasprovenientesdeseiszonasdepesca.Se determinópesototal,largototal,sexoyelestadíodemudadecadaejemplar.Se encontróqueelIRHpresentadiferenciassignificativasentrelosestadíosdemuda,...
Tipo: Journal Contribution
Palavras-chave: Nutritional requirements; Lobster culture; Weight; Length.
Ano: 2012
URL: http://hdl.handle.net/1834/5372

Effect of dietary essential fatty acids on egg quality and larviculture success of the greasy grouper (&lt;i&gt;Epinephelus tauvina&lt;/i&gt; F.): preliminary results
Provedor de dados: 27
Autores: Dhert, P.; Lim, L.C.; Lavens, P.; Chao, T.M.; Chou, R.; Sorgeloos, P.
In spite of its aquaculture potential, the larval rearing of greasy grouper (&lt;i&gt;Epinephelus tauvina&lt;/i&gt;) remains problematic and is not yet commercially feasible. The low and unpredictable larval survival is due to difficulties encountered in spawning the broodstock, the small size of the larvae at first feeding, and the high sensitivity of the larvae until day 45. The nutritional requirements for the broodstock as well as for the young larvae are still enigmatical. In this presentation the impact of supplementing the highly unsaturated fatty acids (HUFA), eicosapentaenoic (EPA), and docosahexaenoic acid (DHA) to the broodstock and larval diets is illustrated.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diets; Fatty acids; Fish culture; Fish eggs; Fish larvae; Nutritional requirements; Survival.
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2852

Improved larval survival at metamorphosis of Asian seabass (&lt;i&gt;Lates calcarifer&lt;/i&gt;) using omega3-HUFA-enriched live food
Provedor de dados: 27
Autores: Dhert, P.; Lavens, P.; Duray, M.; Sorgeloos, P.
Asian seabass (&lt;i&gt;Lates calcarifer&lt;/i&gt;) larvae were fed &lt;i&gt;Brachionus&lt;/i&gt; cultured on &lt;i&gt;Chlorella&lt;/i&gt; and, as soon as ingestion was possible, different types of &lt;i&gt;Artemia&lt;/i&gt; , i.e., nauplii of the San Francisco Bay (SFB) strain, Great Salt Lake (GSL) strain or GSL nauplii that had been bioencapsulated with an emulsion containing high levels of the omega3-HUFAs (highly unsaturated fatty acids) 20:5 and 22:6. San Francisco Bay &lt;i&gt;Artemia&lt;/i&gt; with a good natural fatty acid profile and small body size could be offered earlier than the larger but HUFA-poor Great Salt Lake strain. The poor nutritional quality of the latter, however, could be corrected by enriching the nauplii with an omega3-HUFA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fatty acids; Feeding experiments; Food additives; Food organisms; Metamorphosis; Nutritional requirements; Polyunsaturated fatty acids; Lates calcarifer.
Ano: 1990
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3079

International study on &lt;i&gt;Artemia&lt;/i&gt; : 30. Bio-economic evaluation of the nutritional value for carp (&lt;i&gt;Cyprinus carpio&lt;/i&gt; L.) larvae of nine &lt;i&gt;Artemia&lt;/i&gt; strains
Provedor de dados: 27
Autores: Vanhaecke, P.; Sorgeloos, P.
The nutritional value of fresh hatched nauplii from nine geographical strains of brine shrimp, &lt;i&gt;Artemia&lt;/i&gt; , was determined for larvae of the carp (&lt;i&gt;Cyprinus carpio&lt;/i&gt;). After 2 weeks of culture, the survival of carp larvae was over 90% and no significant differences in survival among treatments were detected. The growth rate of the larvae, however, was a function of the &lt;i&gt;Artemia&lt;/i&gt; strain used. The highest weight gains were recorded with parthenogenetic &lt;i&gt;Artemia&lt;/i&gt; , to the lowest with Chaplin Lake brine shrimp and intermediate results with the other bisexual strains. With the exception of the Chaplin lake strain, the growth results were positively correlated with the size and weight of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed efficiency; Nutritional requirements; Artemia; Cyprinus carpio.
Ano: 1983
URL: http://www.vliz.be/imisdocs/publications/261900.pdf

Food Security Assessment: Why Countries Are at Risk
Provedor de dados: 31
Autores: Shapouri,   Shahla; Rosen,   Stacey L.
Food insecurity in many low-income, developing countries is projected to intensify unless steps are taken to reverse the performance trend of key contributing factors: agricultural productivity, foreign exchange earnings, and population growth. For the poorest countries, an increase in agricultural productivity is the key to improving food security. In these countries, imports play a small role in the domestic food supply because of limited foreign exchange availability. This study evaluates availability and distribution of food and analyzes their trends through 2008 by projecting food gaps to maintain per capita consumption, meet nutritional needs, and fulfill requirements stemming from unequal food distribution.
Tipo: Report
Palavras-chave: Food security; Developing countries; Productivity; Foreign exchange availability; Import capacity; Income distribution; Population growth; Nutritional requirements; Per capita consumption; Food Security and Poverty.
Ano: 1999
URL: http://purl.umn.edu/33614

Interaction between the mineral content and the occurrence number of aquatic fungi in leaves submerged in a stream in the Atlantic rainforest, São Paulo, Brazil
Provedor de dados: 88
Autores: SCHOENLEIN-CRUSIUS,IRACEMA H.; PIRES-ZOTTARELLI,CARMEN L. A.; MILANEZ,ADAUTO IVO; HUMPHREYS,RUBENS D.
Leaves of Ficus microcarpa L. f., Quercus robur L., and Alchornea triplinervia (Spreng.) Muell. Arg., submerged in a stream of the Atlantic rainforest in the "Reserva Biológica do Alto da Serra de Paranapiacaba", State of São Paulo, Brazil, were collected monthly, from April to November 1990, in order to determine the number of fungal occurrences (zoosporic fungi and aquatic Hyphomycetes), and the content of total N (%), total P (%), K+ (%), Ca+2 (%), Mg+2 (%), S+3 (%), Fe+3 (ppm), Cu+3 (ppm), Mn+2 (ppm), Zn+2 (ppm), Bo (ppm), Na+2 (ppm) and Al+3 (ppm). According to the tests of Kruskal-Wallis, Mann-Whitney and Wilcoxon, the means of the mineral content of the three types of leaves were significantly different, except for Mg+2 (%), Mn+2 (ppm), Zn+2 (ppm)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf litter; Zoosporic fungi; Aquatic Hyphomycetes; Atlantic rainforest; Nutritional requirements.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000200004

Effects of different nutritional plans on broiler performance
Provedor de dados: 89
Autores: Buteri,CB; Tavernari,F de C; Lelis,GR; Rostagno,HS; Albino,LFT.
An experiment was carried out at the Department of Animal Science of the Federal University of Viçosa, Brazil, to evaluate the effects of different nutritional plans on the performance of male and female Ross broilers. A completely randomized experimental design with a 6x2 factorial arrangement (six nutritional plans x two sexes) with six replicates of 20 birds per experimental unit was applied. The nutritional plans adopted for males and females included 3, 5, or 28 feeds, and the other 3 plans included 28 feeds containing 92.5, 100, and 107.5% of digestible lysine requirements established according to a mathematical model developed exclusively for Ross broilers. The results showed that the tested 28-feed feeding programs are equivalent, and allow similar...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feeding programs; Lysine levels; Nutritional requirements.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000400003

Calcium and available phosphorus levels for laying hens in second production cycle
Provedor de dados: 89
Autores: Pelicia,K; Garcia,EA; Faitarone,ABG; Silva,AP; Berto,DA; Molino,AB; Vercese,F.
This experiment studied the effect of four calcium (3.0, 3.5, 4.0, and 4.5%) and four available phosphorus levels (0.25, 0.30, 0.35, and 0.40%) in the diet of semi-heavy commercial layers after molting. Hisex Brown® layers between 90 and 108 weeks of age were distributed in a completely randomized experimental design with a 4x4 factorial arrangement with 16 treatments of five replicates of eight birds each. mortality, egg production, feed intake, egg mass, average egg weight, calcium and phosphorus intake, feed conversion ratio (per dozen eggs and per kg eggs), eggshell percentage and thickness, eggshell strength, eggshell weight per surface area (ESWSA), yolk percentage and color, albumen percentage, albumen and yolk heights, and blood and excreta calcium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Available phosphorus; Egg quality; Nutritional requirements; Post-molting; Semi-heavy layers.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000100007

Feed intake and prediction assessments using the NRC, CNCPS and BR-CORTE systems in Nellore and Red Norte steers finished in feedlot
Provedor de dados: 96
Autores: Machado Neto,Otávio Rodrigues; Ladeira,Márcio Machado; Gonçalves,Tarcisio de Moraes; Lopes,Leandro Sâmia; Oliveira,Dalton Mendes de; Bassi,Marcelo Silva.
The objective of this research was to evaluate the dry matter intake (DMI) and nutrient consumption in Nellore and Red Norte steer finished in a feedlot and compare the actual and predicted values by NRC (2000), CNCPS 5.0 and BR-CORTE systems. Forty-one animals, 19 Nellore and 22 Red Norte steers, with initial live weight of 361 ± 31 kg and 367 ± 30 kg, respectively, were used. The experiment lasted 84 days, with 28 days for adaptation and 56 experimental days. The animals were weighed at the beginning and at end of each 28-day period after 16 hours fasting. The dry matter intake was estimated by LIPE, chrome oxide and indigestible dry matter (DMi) markers. There were no differences between Nellore and Red Norte DMI when expressed in kg/day (10.66 vs....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crossbreeding; Markers; Nutritional requirements; Zebu breeds.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000200024

Lysine nutritional requirements of broilers reared in clean and dirty environments during the pre-starter and starter phases
Provedor de dados: 96
Autores: Toledo,Rodrigo Santana; Rostagno,Horacio Santiago; Albino,Luiz Fernando Teixeira; Dionizio,Marli Arena; Carvalho,Débora Cristine de Oliveira; Nogueira,Eduardo Terra.
A total of 3,760 Ross male broiler chicks were used in two trials, one in the pre-starter (1-11 days) phase and the other in the starter (12-22 days) phase. Birds were distributed in a completely randomized experimental design with a factorial arrangement of 5 digestible lysine levels × 2 environments (clean and dirty environment), with eight replicates per treatment. The following dietary digestible lysine levels used were: 1.06, 1.12, 1.18, 1.24 and 1.30% in the pre-starter phase, and 1.00, 1.06, 1.12, 1.18 and 1.24% in the starter phase. Minimal relation of digestible lysine:digestible methionine + cystine, threonine, tryptophan and arginine (72, 67, 19 and 108%, respectively) were maintained, as well as 2.088 and 2.002% of glycine+serine in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestible amino acids; Nutritional requirements; Performance.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001000021

Efficiency of metabolizable energy utilization for maintenance and gain and evaluation of Small Ruminant Nutrition System model in Santa Ines sheep
Provedor de dados: 96
Autores: Regadas Filho,José Gilson Louzada; Pereira,Elzânia Sales; Villarroel,Arturo Bernardo Selaive; Pimentel,Patrícia Guimarães; Fontenele,Rildson Melo; Costa,Marcus Roberto Góes Ferreira; Maia,Iana Sérvulo Gomes; Sombra,Weberte Alan.
This study was carried out to estimate efficiencies of the utilization of metabolizable energy for maintenance (k m) and weight gain (k g) and to evaluate the Small Ruminant Nutrition System (SRNS) model in predicting dry matter intake and average daily gain of growing Santa Ines sheep. Twenty-four non-castrated Santa Ines sheep, at 50 days of age and with average body weight of 13.00 ± 0.56 kg, respectively, were used. After a 10-day adaptation period, four animals were slaughtered to be used as reference for estimating initial empty body weight and body composition of the other animals. The remaining animals were distributed in a random block design, with the treatments consisting of diets containing different levels of metabolizable energy (2.08, 2.28,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mechanistic model; Nutritional requirements; Semiarid.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001100038

Digestible threonine for slow-growing broilers: performance, carcass characteristics, intestinal mucin, and duodenal morphometry
Provedor de dados: 96
Autores: Machado,Noédson de Jesus Beltrão; Lima,Cristina Amorim Ribeiro de; Brasil,Ronner Joaquim Mendonça; Quaresma,Débora Vaccari; Dilelis,Felipe; Silva,Ana Paula Pereira da; Curvello,Fernando Augusto.
ABSTRACT Five experiments were conducted to estimate the digestible threonine requirements of slow-growing broilers: experiment 1, starter phase (days 10 to 28); experiment 2, grower I phase (days 29 to 49); experiment 3, grower II phase (days 50 to 69); experiment 4, finisher phase (days 70 to 84); and experiment 5, which was specifically conducted to determine the production of intestinal mucin over two periods (days 50 to 69 and 70 to 84). Different birds were used in all experiments. A completely randomized design with five treatments and four replicates was used. Treatments consisted of increasing the values of digestible threonine in the diet through basal feed supplementation with L-threonine (98.5%), which was added instead of cornstarch. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acid; Nutritional requirements; Villus.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100514

Evaluation of Nile tilapia strains cultivated in cages under different feeding programmes
Provedor de dados: 96
Autores: Freato,Thiago Archangelo; Freitas,Rilke Tadeu Fonseca de; Pimenta,Maria Emília de Sousa Gomes; Oliveira,Giovanni Resende de; Reis Neto,Rafael Vilhena; Mattos,Bruno Olivetti de.
The objective of this study was to evaluate the performance of three Nile tilapia Oreochromis niloticus strains cultivated in cages and subjected to different feeding programmes. Initially, 31,200 Nile tilapia juveniles with an average weight of 61.15 g were distributed in 48 cages. Two genetically improved strains were used together with one from the Fish Culture Section of Universidade Federal de Lavras (UFLA). The fish were subjected to four feeding programmes, consisting of different levels of crude protein (CP) in diets provided at different stages of cultivation. There was no interaction effect of the strain and feeding programme for most variables. The UFLA strain presented the highest weight gain, but with greatest lack of uniformity at the end of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crude protein; Growth performance; Nutritional requirements; Oreochromis niloticus.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600002

Crude protein level of pre-starter diets and nutritive solution for broilers
Provedor de dados: 96
Autores: Toledo,Rodrigo Santana; Rostagno,Horacio Santiago; Albino,Luiz Fernando Teixeira; Vargas Junior,José Geraldo de; Carvalho,Débora Cristine de Oliveira.
The objective of the present study was to evaluate the effect of dietary crude protein (CP) levels and the use of a nutritive solution via drinking water on the performance of pre-starter broilers. A total of 1,224 male Avian Farm chicks, from one to 40 days of age were used. Birds were distributed in a completely randomized experimental design with a 3 × 2 × 2 factorial arrangement, consisting of three initial body weights (low: 41 g, standard: 45 g and high: 49 g; two crude protein levels at the pre-starter phase (22 and 25% CP),with or without the addition of a nutritive solution, whose nutritional level was similar to the 25% CP pre-starter diet, at a concentration of 5% of the drinking water. Each treatment included six replicates and 17 chicks per...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broilers; Chicks; Nutritional requirements; Performance; Starting phase.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001000020

Performance and carcass traits of Nellore and Red Norte steers finished in feedlot
Provedor de dados: 96
Autores: Machado Neto,Otávio Rodrigues; Ladeira,Márcio Machado; Gonçalves,Tarcisio de Moraes; Lopes,Leandro Sâmia; Oliveira,Dalton Mendes de; Lima,Renato Ribeiro de.
The objective of this work was to evaluate average daily gain (ADG) and carcass traits in Nellore and Red Norte steers, finished in feedlots and to evaluate performance predictions by using the systems BR-CORTE, CNCPS 5.0 and NRC (2000). It was used 41 steers: 19 Nelore animals with initial body weight of 361 ± 31 kg and 22 Red Norte animals with initial body weight of 367 ± 30 kg. Adaptation period lasted 28 days. Animal performance evaluation was composed of three 28 day period, totaling 84 days. At the end of each period, animals were weighed after a 16-hour feeding fast. Average gain weight of Red Norte steers was greater than Nellore breed animals (1.43 vs. 1.81 kg/day, respectively). Red Norte animals also presented greater loin eye area (75.41 cm²...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Composite breeds; Markers; Nutritional requirements; Prediction equations; Zebu cattle.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000500020

What mineral and vitamin levels to recommend in swine diets?
Provedor de dados: 96
Autores: Gaudré,Didier; Quiniou,Nathalie.
Minerals, including trace-elements, and vitamins are currently introduced into the pig diet in order to obtain suitable performances for the modern pig genotype bred in confinement. Most of the mineral and vitamin contents of cereals and usual protein compounds are characterized by their poor and variable availability. Supplemental diets are then usually needed. This paper, based on literature data, reviews the pig requirement for minerals and vitamins in order to ensure economic and profitable performance. Recent research has focused on phosphorus due to environmental considerations. The widespread use of microbial phytase has decreased the need for inorganic phosphates. Cereals are particularly deficient in calcium and sodium, consequently limestone and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environment; Enzymes; Feeding; Meat quality; Modern genotype; Nutritional requirements.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001300019

Body composition and net protein and energy requirements for weight gain of crossbred dairy cattle in grazing
Provedor de dados: 96
Autores: Andrade,Dulciene Karla Bezerra de; Véras,Antonia Sherlânea Chaves; Ferreira,Marcelo de Andrade; Santos,Mércia Virginia Ferreira dos; Melo,Wellington Samay de; Pereira,Kedes Paulo.
The body composition and net protein and energy requirements for weight gain of 5/8 Hostein-Zebu crossbred cattle raised in Brachiaria decumbens Spaft pasture were evaluated. In total, 16 bulls with 10 months of age and body weight (BW) of 180 ± 19.95 kg were used. The animals were kept with free access to pasture or with restricted grazing (from 6 to 10 h). Four animals were slaughtered at the beginning of the experimental period to estimate the empty body weight (EBW) and the initial body composition of the remaining animals. The other animals were slaughtered at the end of the 84-day trial period. The logarithm equations of the protein and energy body content were adjusted according to the logarithm of the empty body weight EBW. From these equations,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutritional requirements; Crossbred dairy; Pasture.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000400022

Critical Review: Essential fatty acids 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: Lipids; Fatty acids; Aquatic invertebrates; Nutritional requirements.
Ano: 2016
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/14000

Protein to energy ratios and cost, performance, and ammonia excretion in juvenile jundiá (Rhamdia quelen), South American catfish
Provedor de dados: 63
Autores: 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

Níveis de proteína bruta e energia metabolizável em uma linhagem de codorna de corte - doi: 10.4025/actascianimsci.v34i2.12589
Provedor de dados: 2
Autores: Veloso, Rogério de Carvalho; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Pires, Aldrin Vieira; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Timpani, Vivian Dagnesi; universidade federal dos vales do jequitinhonha e mucuri; Drumond, Eduardo Silva Cordeiro; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Gonçalves, Flaviana Miranda; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Faria Filho, Daniel Emygdio de; Universidade Federal de Minas Gerais.
O objetivo deste trabalho foi estabelecer os níveis de proteína bruta e energia metabolizável para melhor desempenho em ganho de peso, peso corporal, consumo de ração e conversão alimentar em codornas de corte. Utilizaram-se 540 codornas de corte, durante três períodos experimentais: inicial (1 ao 21 dia), crescimento (22 ao 35 dia) e terminação (36 ao 49 dia). Os tratamentos foram constituídos pela combinação de cinco níveis de proteína bruta (18, 20, 22, 24 e 26% de PB) com três níveis de energia (2.700, 2.900 e 3.100 kcal EM kg-1), distribuídos em três blocos. Os modelos de regressão por superfície de resposta foram adotados como método de análise estatística. A melhor conversão alimentar ocorreu na fase de crescimento (22 ao 35 dia) independente do...
Tipo: Superficie de resposta
Palavras-chave: 5.04.02.00-5 Coturnix coturnix coturnix; Desempenho produtivo; Superfície de resposta; Exigência nutricional Coturnix coturnix coturnix; Performance; Response surface; Nutritional requirements.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/12589

Exigência líquida de zinco, cobre e ferro para cordeiros em pastejo no semiárido - doi: 10.4025/actascianimsci.v32i3.5883
Provedor de dados: 2
Autores: Mendes, Rodrigo de Souza; UFCG; Silva, Aderbal Marcos de Azevêdo; UFCG; Silva, Guilherme de Lira Sobral; UFCG; Nóbrega, Giovanna Henriques da; UFCG; Lôbo, Katiuscia Menezes; UFCG; Pereira Filho, José Morais; UFCG.
Este trabalho teve por objetivo determinar as exigências líquidas de zinco (Zn), cobre (Cu) e ferro (Fe) de cordeiros Santa Inês em pastejo na região semiárida. Os animais com peso vivo entre 20 e 30 kg apresentaram conteúdo corporal no peso de corpo vazio (PCV) para esses minerais de 60,26 a 76,37 mg kg-1, 10,78 a 16,72 mg kg-1 e 133,44 a 126,98 mg kg-1, respectivamente. Observou-se que com o aumento do PCV, as concentrações de Cu e Zn também aumentavam, enquanto a de Fe diminuía. As exigências líquidas para cordeiros em regime de pastejo variaram de 1,69 a 7,86 mg dia-1 para Cu e 7,20 a 27,4 mg dia-1 para Zn. Os resultados obtidos no presente trabalho, para exigências desses minerais, foram maiores do que as exigências dietéticas recomendadas pelo do NRC...
Tipo: Pesquisa de campo
Palavras-chave: Zootecnia composição corporal; Exigências nutricionais; Ferro; Cobre; Zinco; Exigências dietéticas Zootecnia body composition; Nutritional requirements; Iron; Copper; Zinc; Dietary requirements.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/5883

High levels of dietary vitamin E improve the reproductive performance of female Oreochromis niloticus - doi: 10.4025/actascibiolsci.v36i1.19830
Provedor de dados: 3
Autores: Nascimento, Thálita Stefann Ribeiro; Universidade Estadual Paulista "Júlio de Mesquita Filho"; De Stéfani, Marta Verardino; Universidade Estadual Paulista "Júlio de Mesquita Filho"; Malheiros, Euclides Braga; Universidade Estadual Paulista "Júlio de Mesquita Filho"; Koberstein, Teresa Cristina Ribeiro Dias; Universidade Estadual Paulista "Júlio de Mesquita Filho".
This study aimed to evaluate the effect of vitamin E on reproductive responses of female tilapia (Oreochromis niloticus). To this, isonitrogenous and isocaloric diets with different levels of vitamin E supplementation (200, 300, 400, and 500 mg kg-1) were provided to groups of females for 90 days. Supplementation positively influenced the volume of eggs produced, spawning rate, fecundity, hatching rate, average production of larvae, reproductive frequency and survival. The fertilization rate, weight, and diameter of the eggs were not affected by supplementation. This study showed that 400 mg kg-1 vitamin E in the diet during the reproductive period of female Nile tilapia are sufficient to ensure the best reproductive performance, providing efficient...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências agrárias 5.06.03.00-0 α-tocopherol; Broodstock nutrition; Nutritional requirements; Nile tilapia Aquicultura.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/19830

Energy and protein requirements of 3/4 Zebu × 1/4 Holstein crossbreds fed different calcium and phosphorus levels in the diet
Provedor de dados: 45
Autores: Prados,L.F.; Valadares Filho,S.C.; Detmann,E.; Zanetti,D.; Santos,S. A.; Sathler,D.F.T.; Mariz,L.D.S.; Borges,A.L.C.C.; Nunes,A.N.; Rodrigues,F.C.; Amaral,P.M.
The aim of this study was to determine the nutritional requirements of energy and protein for maintenance and weight gain of crossbred cattle, as well as their efficiencies. Fifty 3/4 Zebu × 1/4 Holstein crossbred bulls with initial weights of 214±4kg and aged 11±0.2 months on average were used in this experiment. Four animals were used in the reference group; ten bulls were fed at the maintenance level; and the remaining 36 bulls were fed ad libitum and distributed in a completely randomized design in a 3×3 factorial arrangement, which had three feedlot periods (56, 112 or 168 days) and three calcium and phosphorus levels (low, medium and normal) in the diet. Four of the maintenance animals had their heat production measured by respirometry at the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crossbred bulls; Minerals; Nutritional requirements.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000200555

Levels of digestible isoleucine on performance, carcass traits and organs weight of gilts (15 - 30 KG)
Provedor de dados: 64
Autores: Castilha,Leandro Dalcin; Pozza,Paulo Cesar; Nunes,Ricardo Vianna; Lazzeri,Doglas Batista; Somensi,Marcelo Luiz; Pozza,Magali Soares dos Santos.
The ideal protein concept for pigs has allowed reducing levels of crude protein in the diet, since synthetic amino acids are included because the branched chain amino acids may be limiting. In order to determine the digestible isoleucine requirement for gilts from 15 to 30 kg, a performance assay was accomplished, using 40 crossbreed gilts of high genetic potential, averaging 15.00 ± 0.52 kg of body weight, alloted in a randomized blocks design, consisting of five treatments (0.45, 0.52, 0.59, 0.66, 0.73% of digestible isoleucine), four replicates and two animals per experimental unit. Performance traits were determined and at the end of the experiment one animal per experimental unit was slaughtered to determine carcass composition and organs weight....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Swine nutrition; Branched chain amino acids; Nutritional requirements; Carcass composition.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000400009

Digestible lysine for broiler chickens with lower genetic potential grown on free-range system
Provedor de dados: 64
Autores: Nascimento,Eduardo Souza do; Lima,Cristina Amorim Ribeiro de; Brasil,Ronner Joaquim Mendonça; Machado,Noédson de Jesus Beltrão; Sousa,Felipe Dilelis de Resende; Corrêa,Gerusa da Silva Salles.
ABSTRACT Determining the actual lysine requirement is crucial as it is an essential amino acid and plays animportant role in the metabolism of broilers. In addition, it is the second limiting amino acid for broilers fed with rations formulated basedon corn and soybean meal. The aim of this study was to determine the digestible lysine requirement for male broilers with lower genetic potential for growth in a semi-confined system as well as to evaluate the effects of different values of digestible lysine on performance and carcass characteristics. A total of 300 broiler chickensfrom a commercial lineage EMBRAPA 041 were used with an average initial weight of 987 g. The broilers were distributed into 20 experimental units in a completely randomized design...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acids; Nutritional requirements; Performance; Yield.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000400454