oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 33 )

2019 ( 286 )

2018 ( 352 )

2017 ( 315 )

Custom range...

Search Results: 1 - 10 of 184332 matches for " Priscila Vieira e;Freitas "
All listed articles are free for downloading (OA Articles)
Page 1 /184332
Display every page Item
Níveis de farinha de peixe em ra??es para juvenis de tilápia
Pontes, Edvania da Concei??o;Oliveira, Marinez Moraes de;Rosa, Priscila Vieira e;Freitas, Rilke Tadeu Fonseca de;Pimenta, Maria Emília de Sousa Gomes;Rodrigues, Paulo Borges;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000800002
Abstract: this study was conducted to evaluate, in the ration, the use of fish meal supplement with amino acids on performance, carcass characteristics, and on hematological analysis in nile tilapia juvenils. it was used 140 juveniles with an average weight of 14.0 ± 0.14 g, randomly distributed in a complete random design with five levels of fish meal (0; 1.5; 3.0; 4.5; and 6.0%) in the ration, each one with four replicates. the rations were isoenergetic (3,000 kcal of digestible energy) and isocalcium and fish were fed three times a day until apparent satiety for 60 days. it was evaluated the weight gain, feed intake, apparent feed conversion, protein efficiency rate, hepatosomatic index, carcass weight, carcass yield, nitrogen retention, and hematocrit and hemoglobin rates. the levels of fish meal did not change the weight gain, food conversion, ration intake, hepatosomatic level, carcass yield, carcass weight and hemoglobin rate, but they had a quadratic effect on nitrogen retention, humidity, and fat content on the carcass, and on the hematocrit rate. the higher the levels of fish meal, the lowest the protein efficiency rate and the higher the protein and ash levels in the carcass. the 3% level of fish meal does not affect performance neither carcass characteristics of nile tilapia juveniles.
Influência da concentra??o de benzocaína e do comprimento dos peixes na anestesia e na recupera??o de tilápias-do-nilo
Okamura, Daniel;Araújo, Felipe Guedes de;Rosa, Priscila Vieira e;Freitas, Rilke Tadeu Fonseca de;Murgas, Luis David Solis;Cesar, Marcos Pinto;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000500005
Abstract: to evaluate the influence of benzocaine concentration on the induction and recovery from anesthesia in different sized nile tilapia (oreochromis niloticus), it was developed a random block experiment design in 4 × 4 factorial consisted of four fish lengths (6; 10; 14 and 18 cm total lenght) and four benzocaine concentrations (60; 120; 180 and 240 mg of benzocaine per liter of water). the induction and the recovery from anesthesia were divided in three stages based on the behavior of the fishes under anesthetic effect. the time spent in each stage was recorded. differences in length did not affect significantly the anesthesia and recovery time. linear plateu regressions were generated to estimate the point which increases on anesthetic doses does not imply in further effects. during the anesthesia induction, the plateu occurred in concentration time of 132 mg/l, and estimated time of 86 seconds would be necessary to achieve the complete sedation (stage 3). for permanence of the fish under total sedation, it is needed 190 g/l benzocaine and estimated time of permanence in this stage is 91.1 seconds. benzocaine concentrations above 190 mg/l do not produce any additional effects that justify its use.
Alimenta??o e comportamento de larvas de pacu, Piaractus mesopotamicus (Holmberg, 1887)
Beerli, Eduardo Lopes;Logato, Priscila Vieira Rosa;Freitas, Rilke Tadeu Fonseca de;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000100020
Abstract: the objective of this research was to evaluate the effect of natural and artificial diets on the development and behavior of pacu (piaractus mesopotamicus) larvae, between the 2nd and 10th day post hatch. the larvaes were kept in 30l - plastic boxes (n = 30 boxes), in constant flow-through. the larvae density was 10 post-larvae/l (300 larvae/box). six diets with 4 sampling days (4, 6, 8 and 10 days post-hatch, n = 30 larvae) using 5 repetitions were tested. the diets were: t1- commercial feed, t2- plancton, t3- artemia, t4- plancton + feed, t5- artemia + feed and t6- artemia + plancton. larvaes were fed 6 times a day: 4, 8, 12, 16, 20 and 24 hours. the water temperature was kept constant at 27oc, dissolved oxigen was kept between 6.16 ± 0.34 and ph between 7,16 ± 0,22. at the end of the experiment (10th day post-hatch), the larvaes that received diet containing artemia + plancton (t6) were longer (8.35 mm) and heavier (3518 μg body weight), compared to the larvae fed with the other tested diets. the larvae should be in the laboratory for 6 days after hatch, being feed from the 3rd day after hatch. before the 6th day, the larvae have the gas bladder completely full and swim continuously.
RELATIVE GROWTH AND ALLOMETRIC COEFFICIENTS OF BODY COMPONENTS OF STRAINS OF NILE TILAPIA(Oreochromis niloticus) CRESCIMENTO RELATIVO E COEFICIENTES ALOMéTRICOS DE COMPONENTES DO CORPO DE LINHAGENS DE TILáPIAS-DO-NILO (Oreochromis niloticus)
Vander Bruno dos Santos,Thiago Archangelo Freato,Rilke Tadeu Fonseca de Freitas,Priscila Vieira Rosa Logato
Ciência Animal Brasileira , 2006,
Abstract: This experiment was carried out in the fish production facilities of the Federal University of Lavras, MG – Brazil, to study relative growth and allometric coefficients of body components on body weight of Nile tilapia. Fishes, weighing between 150 and 790g, were randomly sampled during every period of growing, have been 93 of the Chitralada strain and 78 of the Supreme. After 24 hours of fasting, the fishes were insensibilized (thermal shock), slaughtered (anoxia), weighed and dissected to obtain body components weights. The allometric equation y = axb of Huxley (1932) and the statistic t (á = 0,01) were used for hypothesis test of b=1 and than the growth of the body components parts were classified in: isogonic (b=1), later (b>1) and early (b<1). The scale and fins, head and viscera didn’t show significant difference between the strains and obtained, respectively, allometry coefficient b=1, b>1 and b<1. Chitralada strain showed early growth for carcass and filleting remnants, late for skin andisogonic for fillet. On the other hand, Supreme showed isogonic growth for carcass, skin and filleting remnants and late growth for fillet, that is desirable for meat production. KEY WORDS: Allometry, fillet, fish, Supreme, Thai. Este trabalho foi desenvolvido no setor de piscicultura da Universidade Federal de Lavras, MG, com o objetivo de estudar o crescimento relativo e coeficientes alométricos de componentes do corpo em rela o ao peso corporal de tilápias-do-nilo. Amostraram-se, aleatoriamente, peixes pesando entre 150 e 790g durante todo o período de crescimento, sendo 93 da linhagem Chitralada e 78 da Supreme. Após jejum de 24 horas, foram insensibilizados por choque térmico, abatidos (por anóxia), pesados e dissecados para se obter o peso das partes componentes do corpo. Utilizou-se a equa o alométrica de Huxley (1932), y = axb e a estatística t (á = 0,01) para testar a hipótese b=1 e classificar o crescimento das partes componentes do corpo em: isog nico (b=1), tardio (b>1) e precoce (b<1). As escamas e nadadeiras, cabe a e vísceras n o apresentaram diferen as significativas entre as linhagens e obtiveram, respectivamente, coeficientes de alometria b=1, b>1 e b<1. A linhagem Chitralada apresentou crescimento precoce para a carca a e resíduos da filetagem, tardio para a pele, isog nico para o filé. No entanto, a Supreme apresentou crescimento isog nico para a carca a, pele e resíduos da filetagem e crescimento tardio para o filé, que é desejável na produ o de carne. PALAVRAS-CHAVE: Alometria, filé, peixe, Supreme, tailandesa.
Efeito do processamento do milho sobre o desempenho e composi??o de carca?a de piaba (Leporinus friderici) criada em tanques-rede
Vieira, Jodnes Sobreira;Logato, Priscila Vieira Rosa;Ribeiro, Paula Adriane Perez;Freitas, Rilke Tadeu Fonseca de;Fialho, Elias Tadeu;
Ciência e Agrotecnologia , 2005, DOI: 10.1590/S1413-70542005000200025
Abstract: the experiment with the objective of verify the effects of the processing (extrusion, rolling and pelleting of corn) on the performance and composition of the piaba (leporinus frederici) carcass, was conducted in the usina hidreletrica da companhia energética de minas gerais - cemig (minas gerais hydroelectric station), in the itutinga- mg , with the lenght of 45 days. the experiment was undertaken in 24 cages of 1m3, 480 fingerlings were utilized, they were distributed into blocks. the four experimental rations were formulated based in corn meal, extruded corn, rolled corn and pelleted corn. the data obtained were submitted to the analysis of variance and the comparison of means of the treatments by the scott & knott test. the results showed any statistical difference in the performance parameters. however, the use of extruded corn and corn meal increased protein content (p<0.05) and decreased fat content (p<0.05) of the carcass traits, these results showed, improved protein utilization for structural purposes. in conclusion the corn processing did not improve the performance of the fish and that corn meal and extruded corn increased protein content and reduced fat content in the carcass.
Coeficiente de digestibilidade aparente de cinco fontes energéticas para o jacaré-do-pantanal (Caiman yacare, Daudin, 1802)
Maciel, Fernando Rodrigues;Logato, Priscila Vieira Rosa;Fialho, Elias Tadeu;Freitas, Rilke Tadeu Fonseca de;Victor Manuel, Alexio;
Ciência e Agrotecnologia , 2003, DOI: 10.1590/S1413-70542003000300024
Abstract: a metabolism trial was carried out at the facilities of the cooperative of growers of the "jacaré do pantanal" , in cáceres - mt, with the objective of evaluating the nutritional value of five energetic feedstuffs for the "jacaré-do-pantanal" (caiman yacare). a completely randomized design with five treatments and three replicates was utilized, the experimental unit being constituted of three caimans, with a total mean weight of 3940 ± 240 g, average environmental temperature of 30.5 ± 5.0oc and average temperature of the water of 27.8 ± 1.0oc. the amount of feed furnished per replicate every two days was standardized in 20 g of dry matter per unit of metabolic weight (kg0.75). the means of the coefficients of apparent digestibility were compared through tukey’s test (p<0,05). the coefficient of apparent digestibility of dry matter was of 80.78; 68.08; 69.91; 30.12 and 58.95 and the coefficient of apparent digestibility of gross energy (cadge) was of 82.59; 60.58; 61.66; 25.17 and 48.57 for glucose, dextrin, cornstarch, ground corn and pectin, respectively. glucose showed the highest cadge value and corn the lowest (p<0,05).
Effect of the ration processing on the apparent digestibility values of nutrients for the piau (Leporinus elongatus)
Logato, Priscila Vieira Rosa;Albernaz, Norka da Silva;Ribeiro, Paula Adriane Perez;Freitas, Rilke Tadeu Fonseca de;Fialho, Elias Tadeu;
Ciência e Agrotecnologia , 2009, DOI: 10.1590/S1413-70542009000300032
Abstract: the experiment carried out at national center for research in tropical fish pirassununga, sp, aiming to determine the effect of the ration processing on the apparent digestibility coefficients of the ingredients for the piau (l. elongatus). a total of 600 males of piau were utilized, allotted into six ponds of 300l. the applied treatments were: grinder processed ration, pelleting ration and extruded ration, utilizing rations with 32% crude protein and 3400 kcal de.kg-1. the experiment was in a randomized blocks design with three treatments, three blocks and two replicates. the data were submitted to variance analysis by the saeg computational package and the means of the treatments compared by snk test (5% of significance). the results showed that there were significant differences among the digestibility coefficients of both protein and energy for the pelleted and extrused rations (p<0.05). the results showed no statistical differences for the apparent digestibility coefficient of the dry matter (p>0.05).
Phytase in rations of growing pigs: performance, blood parameters and bone mineral content
Silva, Hunaldo Oliveira;Fialho, Elias Tadeu;Freitas, Rilke Tadeu Fonseca de;Lima, José Augusto de Freitas;Logato, Priscila Rosa Vieira;Schoulten, Neudi Artemio;
Ciência e Agrotecnologia , 2004, DOI: 10.1590/S1413-70542004000600028
Abstract: it was intended with the present work to verify the effect of phytase on the performance, bone mineralization and content of plasma urea of swine. 80 swine (30 ± 3.1 kg/lw), crossbred (ld x lw) males and females, allocated to a randomized block design (rbd) with four treatments and five replicates. the treatments consisted of a growing swine diet on the basis of corn, soybean meal and defatted rice bran (drb) supplemented with four levels of phytase (0, 400, 800 and 1200 ftu/kg) the diet was formulated to meet the requirements of growing swine except for available calcium and phosphorus, the levels of which were 0.64 and 0.25%, respectively. the enzyme phytase utilized was natuphos 5000. over the experimental period every eight days, blood of two animals per block was collected through a puncture in the sinus orbital, to determine the plasma urea content. at the final of the experimental period, two animals were slaughtered for collection of the metacarpus bone, aiming to verify the mineral content. the variables analyzed were: daily average weight gain (dawg), daily average ration consumption (darc), feed conversion (fc), content of plasma urea, content of ashes, calcium, phosphorus, manganese, zinc and magnesium in the bone. the phytase levels provided a linear improvement (p<0.05) on feed conversion and a quadratic effect on swine's plasma urea content. phytase promoted a linear increase (p<0.05) on the content of calcium and phosphorus in the swine's metacarpus bone. the level of 750 ftu/kg provided the lowest plasma urea content. it is concluded that the use of the enzyme phytase in growing swine diets improved feed conversion, decreased the plasma urea content and increased the contents of calcium and phosphorus in the bone.
Perfil lipídico e composi o química de tilápias nilóticas em diferentes condi es de cultivo Lipid profile and chemical composition of Nile tilapia under different raising conditions
Paula Adriane Perez Ribeiro,Priscila Vieira e Rosa,Jodnes Sobreira Vieira,Ant?nio Carlos Silveira Gon?alves
Revista Brasileira de Saúde e Produ??o Animal , 2011,
Abstract: Objetivou-se com este trabalho avaliar o perfil lipídico e a composi o química dos filés de tilápia nilótica (Oreochromis niloticus) mantida em três condi es de cultivo, por um período de 120 dias. Foram utilizados 2075 machos sexados de tilápia, distribuídos em dois tanques de terra e um tanque de alvenaria. Os tratamentos aplicados foram: dieta base em tanque de alvenaria; dieta base em tanque de terra e alimenta o natural por meio de fertiliza o química e organica em tanque de terra. O delineamento experimental foi inteiramente casualizado, com três tratamentos e dez repeti es. Os parametros avaliados foram: identifica o do plancton, perfil de ácidos graxos e teores de umidade, proteína bruta, extrato etéreo e cinzas dos filés. Os dados obtidos foram submetidos à análise de variancia e as médias dos tratamentos foram comparadas pelo teste de Tukey (5% de significancia). Foram encontrados cinco gêneros distintos de zooplancton e quatro gêneros de fitoplancton predominantes. Os resultados demonstraram n o haver diferen a estatística para o teor de umidade e cinzas dos filés. Porém, os animais mantidos no sistema fertilizado apresentaram filés com maior teor de proteína bruta e menor teor lipídico, além de uma melhor rela o mega-3/ mega-6, com maiores quantidades de DHA (ácido graxo docosahexaenóico). This study aimed to evaluate the lipid profile and the chemical composition of the fillets of Nile tilapia (Oreochromis niloticus) maintained under three raising conditions, for a period of 120 days. A total of 2075 sexed males of tilapia were utilized, allotted into two ponds and one alvenaria pond. The applied treatments were: feeding with a basal diet in the alvenaria pond; feeding with the basal diet in the earthen pond and natural feeding through chemical and organic fertilization. The experimental design was in a completely randomized design, with three treatments and ten replicates. The evaluated parameters were: identification of plankton, profile of fatty acids and contents of moisture, crude protein, etereo extract and ashes of the fillets. The data were subjected to analysis of variance and the means of the treatments were evaluated by Tukey′s test (5% of significance). A total of five predominant distinct genera of zooplankton and four genera of phytoplankton were found. The results shown any statistical differences for the moisture and ashes contents of the fillets over all treatments tested. Therefore only the animals raised under the fertilization system shown increased crude protein content and decreased lipid content. The fatty aci
Efeito do peso de abate nos rendimentos do processamento da piracanjuba (Brycon orbignyanus, Valenciennes, 1849)
Freato, Thiago Archangelo;Freitas, Rilke Tadeu Fonseca de;Santos, Vander Bruno dos;Logato, Priscila Vieira Rosa;Viveiros, Ana Tereza de Mendon?a;
Ciência e Agrotecnologia , 2005, DOI: 10.1590/S1413-70542005000300024
Abstract: the objective of this study was to evaluate the effect of body weight on processing yields of a teleost fish piracanjuba (brycon orbignyanus, valenciennes, 1849). firstly, fingerlings were reared in ponds in the fish culture of the animal sciences department, federal university of lavras, m.g. - brazil, for 18 months. then, 121 fishes were insensibilized, slaughtered, weighed and dissected, in order to determine the percentages of head (%cab), fins (%nad), visceras (%vis), skin with scales (%pe), and fillet residues (%rf), and the carcass yield (rcar) and fillet without skin yield (rfsp), in relation to body weight. for analyses of variances, data were distributed over four weight classes (cp1 = 515 to 629g; cp2 = 630 to 744g; cp3 = 745 to 859g; and cp4 = 860 to 975g) and the regression equations were estimated in function of mean weight of each class. there was no effect (p>0,05) of weight class on rcar, %nad and %pe. however, a linear effect of body weight on %cab (p<0,01), %rf (p<0,01) and rfsp (p<0,09) and a quadratic effect on %vis (p<0,05) were observed. the %cab and %rf decreased while rfsp and %vis increased, with the increase of body weight. based on these results, it can be concluded that heavier piracanjubas provide larger rfsp, smaller %cab and smaller %rf. the smaller %cab on heavier fish did not increase rcar, as expected probably because of the increase on %vis.
Page 1 /184332
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.