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The objectives of this experiment were to evaluate the effects of increasing levels of orange molasses in replacement of flint corn grain in high-concentrate diets on dry matter intake (DMI), average daily gain (ADG) and feed efficiency... more
The objectives of this experiment were to evaluate the effects of increasing levels of orange molasses in replacement of flint corn grain in high-concentrate diets on dry matter intake (DMI), average daily gain (ADG) and feed efficiency (FE) of feedlot lambs. Thirty male lambs without defined racial pattern (30.3 ± 5.3 kg of initial BW; mean ± SD) were used in a randomized complete block design with 10 blocks and 3 treatments. The treatments were defined by partial replacement of flint corn by orange molasses in the diet with 90% of concentrate and 10% of Cynodon spp hay, as follow: 0OM – control diet without orange molasses; 20OM – 20% of orange molasses replacing flint corn and 40OM – 40% of orange molasses replacing flint corn (DM basis). The experiment lasted 72 days divided into 3 subperiods, with 1subperiod of 16 days and 2 subperiods of 28 days. Animals were weighed after a16-h fast on days 1, 16, 44 and 72 of the experimental periods to determine the ADG and FE. The DMI, ADG...
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The aim of this study was to evaluate the effects of diets with fatty acid profiles on lactation performance and milk composition of ewes. Dorper vs. Santa Inês ewes (n=40; 54.9 ± 8.3 kg BW and 14 days in milk) were penned individually... more
The aim of this study was to evaluate the effects of diets with fatty acid profiles on lactation performance and milk composition of ewes. Dorper vs. Santa Inês ewes (n=40; 54.9 ± 8.3 kg BW and 14 days in milk) were penned individually and used in a randomized complete block design. Ewes were fed a basal diet (19.87 ± 0.62% CP) containing 70% concentrate and 30% coastcross hay, and no added oil (CON). The remaining diets were added with 4.0% of soybean oil (SO), calcium salts of palm fatty acids (CSPF), or calcium salts of soybean fatty acids (CSSF) (DM basis). Ewes were fed the diets from the week 2 to 10 of lactation. Milk production was determined every 7 days during the experiment. Ewes were separated from their lambs and mechanically milked for emptying of the mammary gland. After 3 hours, using the same procedure, milk production was recorded and samples collected for milk composition analysis. The addition of SO decreased (P< 0.001) DM intake, with no difference between th...
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ABSTRACT: This study evaluated forage-free diets supplemented with sodium bicarbonate (SB) based on ground flint corn on intake, apparent nutrient digestibility, ruminal parameters, and N balance. Four rumen-cannulatedDorper × Santa Inês... more
ABSTRACT: This study evaluated forage-free diets supplemented with sodium bicarbonate (SB) based on ground flint corn on intake, apparent nutrient digestibility, ruminal parameters, and N balance. Four rumen-cannulatedDorper × Santa Inês lambs, with a body weight of 43.4 ± 0.85 kg (mean ± standard deviation) were used. The experimental design was a 4×4 Latin square. Each experimental period lasted 21 days. Experimental diets were: positive control, a diet without SB containing 400 g/kg DM of soybean hulls (CONT), and three diets based on ground flint corn, containing 10 (10SB), 20 (20SB) or 30 (30SB) g/kg DM of SB. Intake of neutral and acid detergent fiber was greater for CONT (P < 0.01) when compared to SB. Intake and apparent nutrient digestibility of dry and organic matter, ether extract, and crude protein did not differ. Intake (P = 0.01) and digestibility (P < 0.01) of non-fiber carbohydrates were greater for SB diets and neutral detergent fiber digestibility was greater...
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Research Interests: Microbiology, Veterinary Medicine, Veterinary Microbiology, Herpes and Herpesviruses, Virology, and 10 moreVeterinary Virology, Equine science, Equine medicine, Horse, Respiratory System, Respiratory Tract Infections, Asymptomatic, Bronchoalveolar lavage, Subclinical Infection, and Equine herpesvirus
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A Mieloperoxidase (MPO) e elastase desempenham papeis fisiologicos importantes nos mecanismos fisiopatologicos associados a certas doencas, nomeadamente as que envolvem inflamacao e ativacao neutrofilica. Nesse sentido, a avaliacao dos... more
A Mieloperoxidase (MPO) e elastase desempenham papeis fisiologicos importantes nos mecanismos fisiopatologicos associados a certas doencas, nomeadamente as que envolvem inflamacao e ativacao neutrofilica. Nesse sentido, a avaliacao dos niveis plasmaticos destas duas substâncias e utilizada com frequencia como um marcador indireto de ativacao dos neutrofilos. O exercicio intenso em cavalos induz uma mudanca na contagem de celulas brancas e na ativacao dos neutrofilos e ainda pode levar a ruptura dos capilares pulmonares e consequentemente a Hemorragia pulmonar induzida pelo exercicio (EIPH), a qual pode estar associada a inflamacao das vias aereas. O objetivo deste estudo foi avaliar a concentracao de mieloperoxidase (MPO) e elastase pelo ensaio imunoenzimatico (ELISA) no plasma de cavalos com EIPH e sem EIPH antes e apos o exercicio em esteira de alta velocidade e correlacionar estes como marcadores de EIPH.
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A indústria de produção de pectina gera um resíduo composto por pedúnculo, endocarpo, vesículas de suco, columela, sementes e minúsculas frações de epicarpo e mesocarpo de frutas cítricas, denominada Polpa Cítrica Úmida... more
A indústria de produção de pectina gera um resíduo composto por pedúnculo, endocarpo, vesículas de suco, columela, sementes e minúsculas frações de epicarpo e mesocarpo de frutas cítricas, denominada Polpa Cítrica Úmida (WCP), que ainda não foi testada como alimento na nutrição de ovinos. Sendo assim, este estudo teve como objetivo avaliar o efeito da substituição parcial do milho pela WCP em dietas contendo elevado teor de concentrado sobre o desempenho e a concentração de enzimas hepáticas de cordeiros confinados. Quarenta e dois cordeiros machos (15 Santa Inês e 27 ½ Dorper x Santa Inês), com 24,7 ± 1,5 kg de peso corporal e 60 ± 5 dias de idade foram distribuídos em delineamento de blocos completos casualizados. Dentro de cada bloco (n = 14), os cordeiros foram distribuídos aleatoriamente entreos tratamentos: 0WCP – dieta contendo 75,5% de milho moído, sem a inclusão de WCP; 20WCP – dieta contendo 20% de WCP em substituição ao milho moído; e 40...
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O objetivo deste trabalho foi comparar a eficacia da ivermectina em formulacao oral em gel com a formulacao “pour-on” em equinos. Foram utilizados 24 animais, distribuidos em dois grupos (n=12), onde o grupo 1 recebeu ivermectina por via... more
O objetivo deste trabalho foi comparar a eficacia da ivermectina em formulacao oral em gel com a formulacao “pour-on” em equinos. Foram utilizados 24 animais, distribuidos em dois grupos (n=12), onde o grupo 1 recebeu ivermectina por via oral e o grupo 2, por via “pour-on”. Foram realizados exames coproparasitologicos antes da administracao do anti-helmintico para se obter os valores de ovos por grama de fezes (OPG) e dividir os grupos de forma a se obter uma carga parasitaria semelhante em numero. Os exames coproparasitologicos foram realizados aos 7, 14, 21 e 28 dias apos administracao dos medicamentos. Verificou-se que o tratamento via oral apresentou reducao significativa da contagem de OPG (p<0,05), o que nao ocorreu nos animais quando a ivermectina foi aplicada sob a forma “pour on”. Foi possivel concluir que a formulacao existente da ivermectina “pour-on” usada em bovinos nao e eficaz para equinos, nao sendo indicada a sua utilizacao nessa especie.
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A Hemorragia pulmonar induzida pelo exercicio (EIPH) e uma sindrome de alta ocorrencia nos equinos atletas, sendo o lavado broncoalveolar (BAL), com auxilio de endoscopia, um instrumento importante na avaliacao das vias aereas... more
A Hemorragia pulmonar induzida pelo exercicio (EIPH) e uma sindrome de alta ocorrencia nos equinos atletas, sendo o lavado broncoalveolar (BAL), com auxilio de endoscopia, um instrumento importante na avaliacao das vias aereas posteriores, permitindo seu diagnostico mais preciso. Alguns cavalos tem evidencia de hemorragia no pulmao, mas nao apresentam sangue visivel na traqueia, podendo apresentar resultados falso-negativos. A contagem de celulas vermelhas no BAL faz com que aumentem as chances de diagnostico nas EIPH subclinicas. O objetivo do estudo foi avaliar o efeito do metodo de analise de celulas vermelhas obtidas em diferentes diluicoes, bem como avaliar a correlacao entre a concentracao de celulas vermelhas determinadas pelo metodo pelo aparelho CELL-DYN 3700 e a câmara de Neubauer.
Cavalos carroceiros sao utilizados como animais de tracao no transporte de material reciclavel e podem percorrer longas distâncias carregando peso elevado, de modo que, assim como um cavalo atleta, dependem do correto funcionamento de seu... more
Cavalos carroceiros sao utilizados como animais de tracao no transporte de material reciclavel e podem percorrer longas distâncias carregando peso elevado, de modo que, assim como um cavalo atleta, dependem do correto funcionamento de seu aparelho respiratorio para desempenhar satisfatoriamente sua funcao. O objetivo do estudo foi avaliar a presenca de alteracoes em vias aereas em cavalos carroceiros no municipio de Pinhais/PR e associar a volume globular (VG), fibrinogenio e proteina plasmatica total (PPT).
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The objectives were to evaluate the effects of two non-fibrous carbohydrate sources and the rate of body weight gain on puberty status in ewe lambs. Sixty ewe lambs (½ Dorper × ½ Santa Ines) with an initial body weight of 25.1 ± 4.1 kg... more
The objectives were to evaluate the effects of two non-fibrous carbohydrate sources and the rate of body weight gain on puberty status in ewe lambs. Sixty ewe lambs (½ Dorper × ½ Santa Ines) with an initial body weight of 25.1 ± 4.1 kg and 102.8 ± 1.5 days old were distributed in a randomized complete block design with 10 blocks and 3 treatments. The trial lasted 119 days, in which performance was evaluated on days 28, 56, 84, and 119, and puberty status was every week evaluated by progesterone concentration. The treatments were characterized by the inclusion of different carbohydrate sources in the diets in order for ewe lambs to reach different rates of body weight gain: CORN, total diet containing 46% of corn (% DM); PCP, total diet containing 46% of pelleted citrus pulp (% DM); and HAY, total diet containing 80% of coastcross hay (% DM). The CORN- and PCP-based diets were formulated for an average daily gain (ADG) of 0.200 kg/day and a HAY-based diet for an ADG of 0.100 kg/day. There was an interaction between treatments and experimental periods for dry matter intake (DMI) ( P < 0.01), in which lambs in the CORN treatment presented DMI similar to PCP in the first and second periods, but lambs from the PCP treatment presented lower DMI than the CORN treatment in subsequent periods. In all periods, the body weight, average daily gain, and feed efficiency of CORN lambs were similar to PCP lambs, but higher than HAY lambs. The age at puberty was not affected by treatments; however, lambs fed with non-fibrous carbohydrate sources reached puberty heavier ( P < 0.0001) than lambs from the HAY treatment. Despite the high increase in body weight for lambs fed with non-fibrous carbohydrate sources, it did not affect the age of puberty.
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Abstract This trial aimed to evaluate the effects of increasing levels of raw soybeans on milk yield, composition, and fatty acid profile in ewes, and their lambs’ performance. Fifty-six Santa Ines ewes (63.9 ± 0.76 kg BW) were assigned... more
Abstract This trial aimed to evaluate the effects of increasing levels of raw soybeans on milk yield, composition, and fatty acid profile in ewes, and their lambs’ performance. Fifty-six Santa Ines ewes (63.9 ± 0.76 kg BW) were assigned to a randomized complete block design to receive one of the four diets containing 0 (CONT), 70, 140 or 210 g/kg DM of raw soybeans. Isonitrogenous diets (150 g/kg DM of CP) were composed of 400 g/kg DM of in natura sugarcane bagasse as roughage source and 600 g/kg DM of concentrate. The experiment lasted from 14 to 56 days of lactation. Once a week the ewes were separated from their lambs and milked mechanically. DMI (1.3, 1.3, 1.5 and 1.2 kg/day) and milk yield (1.0, 1.1, 1.1 and 1.0 kg/day) presented a quadratic effect ( P 0.05) including 0, 70, 140 or 210 g/kg DM of raw soybeans on diets, respectively. However, milk yield corrected for fat or fat and protein, as well as content of milk fat, protein, lactose and total solids did not differ. Short (C4-C12) and medium (C14-C16) chain fatty acids decreased, whereas long-chain (C ≥ 17) fatty acids increased linearly ( P 0.05) with raw soybeans supply. Conjugated linoleic acid (CLA; cis -9 trans -11 and trans -10 cis -12) increased ( P ≤ 0.01) and the atherogenicity index decreased linearly ( P 0.05) with increasing levels of raw soybeans in the diet. Unsaturated:saturated ratio, saturated, unsaturated, monounsaturated and polyunsaturated fatty acids were similar among treatments. There was no difference in lambs’ performance in pre or post-weaning periods. Considering that the price of raw soybeans is generally lower than its meal, the inclusion of up to 140 g/kg DM of soybeans is recommended for increasing milk yield, with no detrimental effect on milk efficiency production, milk components and lambs’ performance. In addition, it is important to highlight that supplementation of up to 210 g/kg DM of raw soybeans made milk fat healthier for human consumption.
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This paper describes the in vivo Bronchoalveolar lavage (BAL) technique by endoscopy in tapirs (Tapirus terrestris) with clinical signs of tuberculosis. The technique was performed in two tapirs, male and female, from Curitiba Zoo,... more
This paper describes the in vivo Bronchoalveolar lavage (BAL) technique by endoscopy in tapirs (Tapirus terrestris) with clinical signs of tuberculosis. The technique was performed in two tapirs, male and female, from Curitiba Zoo, Paraná, Brazil. A flexible endoscope and a polyethylene catheter were used after the chemical restraint of the animals. For BAL technique, 60mL of saline 0.9% were infused with a polyethylene catheter, introduced by the endoscope's working channel, and 15mL of BAL were recovered, analyzed and submitted to cytocentrifugation. Slides were stained by Papanicolaou, periodic acid-Schiff (PAS) and Ziehl-Neelsen methods contained high quantity of inflammatory cells on light microscopy (macrophages 27.5%, lymphocytes 0.5%, neutrophis 67% and eosinophis 5%). BAL samples were submitted to culture, bacilloscopy and PCR and were negative for both animals. Based on this study, it was concluded that the bronchoalveolar lavage technique in tapirs is feasible, simple...
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O objetivo deste estudo foi avaliar as características químicas (teores de lactose, proteína, gordura, sólidostotais e contagem de células somáticas) do leite de jumentas da raça Pêga, criadas em sistema de semiconfinamentona região de... more
O objetivo deste estudo foi avaliar as características químicas (teores de lactose, proteína, gordura, sólidostotais e contagem de células somáticas) do leite de jumentas da raça Pêga, criadas em sistema de semiconfinamentona região de Ponta Grossa, Paraná. Quinze jumentas com idade média de 9,4 anos foramutilizadas neste estudo. A jumentas foram ordenhadas manualmente a cada 15 dias, com início no 7˚ diaapós o parto, até os 150 dias de lactação. As amostras de leite foram armazenadas e transportadas emfrasco plástico contendo Bronopol (45 mL), totalizando dez amostras por animal. O leite das jumentasapresentou reduzidos teores de gordura (1,28%), proteína (2,11%) e sólidos totais (10,71%), e elevadosde lactose (6,29%), quando comparado ao leite bovino. Foram observadas correlações negativas entreos teores de gordura (-0,332), proteína (-0,620) e sólidos totais (-0,497) em função dos dias de lactação,tendo uma queda diária de 0,0056%, 0,0061% e 0,0095%, respectivamente. Entretanto, ...
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The study aimed to evaluate if the frequency of narasin supplementation impacts dry matter intake, ruminal fermentation parameters, and apparent digestibility of nutrient in Nellore (Bos indicus) steers fed forage-based diets. A total of... more
The study aimed to evaluate if the frequency of narasin supplementation impacts dry matter intake, ruminal fermentation parameters, and apparent digestibility of nutrient in Nellore (Bos indicus) steers fed forage-based diets. A total of 32 rumen-cannulated Nellore steers (initial body weight [BW] = 317 ± 27 kg; age =18 ± 1 mo) were assigned to individual pens in a randomized complete block design according to their initial shrunk BW. Within block, steers were randomly assigned to 1 of 4 treatments: 1) forage-based diet without the addition of narasin (CON; n = 8), 2) CON diet plus 13 ppm of narasin every 24 h (N24; n = 8), 3) CON diet plus 26 ppm of narasin every 48 hours (N48; n = 8), or 4) CON diet plus 39 ppm of narasin every 72 hours (N72; n = 8). The experimental period lasted 30 d, with 18 d for diet adaptation and 12 d for sample collection. The experimental diets contained 95% of Tifton-85 (Cynodon dactylon spp.) haylage and 5% ground corn used as a delivery vehicle for nar...
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Background: Respiratory conditions are the leading cause of training disruption in racing horses. Molecular approaches to diagnose respiratory viruses have provided an opportunity for early and subclinical pathogen detection, particularly... more
Background: Respiratory conditions are the leading cause of training disruption in racing horses. Molecular approaches to diagnose respiratory viruses have provided an opportunity for early and subclinical pathogen detection, particularly in samples from the upper respiratory tract. Gammaherpesvius (EHV-2 and EHV-5) have variable presentations in horses. However, the infection can be asymptomatic and act as a co-factor for the development of other diseases. In this descriptive observational study, 10 healthy, young horses at regular training in Southern Brazil underwent clinical examination, videoendoscopy of the respiratory system, cytological evaluation of TA (tracheal aspirate) and BALF (bronchoalveolar lavage fluid), along with qPCR, in order to evaluate the presence of EHV-2 and EHV-5 in lower respiratory tract samples and compare with correspondent cytological and endoscopical findings. Results: At least one abnormality per horse during endoscopy examination was observed, incl...
Pectin industry generates a citrus pulp residue compounded by peduncle, endocarp, juice vesicles, columella, seeds and tiny fractions of epicarp and mesocarp of citrus fruits, denominated Wet Citrus Pulp (WCP), which has not yet... more
Pectin industry generates a citrus pulp residue compounded by peduncle, endocarp, juice vesicles, columella, seeds and tiny fractions of epicarp and mesocarp of citrus fruits, denominated Wet Citrus Pulp (WCP), which has not yet been tested as food for lamb’s nutrition. Thus, this study aimed to determine the effect of partial replacement of ground corn by WCP in high-concentrate diets on the performance and hepatic enzyme concentration of feedlot lambs. Forty-two male lambs (15 Santa Inês and 27 ½ Dorper × Santa Inês), with 24.7 ± 1.5 kg of BW and 60 ± 5 d of age was assigned to a randomized complete block design. Within blocks (n = 14), lambs were randomly assigned to 1 of 3 treatments: 0WCP (control) – diet containing 75.5% ground corn without WCP; 20WCP – diet containing 20% WCP in replacement of ground corn, and 40WCP – diet containing 40% WCP in replacement of ground corn. The experiment lasted 70 days, which was split in 3 experimental periods (14 days of diets’ adaptation an...
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The objective of this trial was to evaluate the effects of increasing levels of narasin in the diet of lactating ewes on dry matter intake (DMI) and average daily gain (ADG) of their lambs. Forty crossbred ewes Dorper x Santa Inês with... more
The objective of this trial was to evaluate the effects of increasing levels of narasin in the diet of lactating ewes on dry matter intake (DMI) and average daily gain (ADG) of their lambs. Forty crossbred ewes Dorper x Santa Inês with their lambs were assigned to a randomized complete block design (10 blocks and 4 treatments). The treatments were defined by the inclusion of narasin to a base diet (16.8 ± 0.66 of CP) containing 50% of concentrate and 50% of Brachiaria brizanta hay, as follow: 0N - control diet; 13N - 13 mg of narasin/kg of DM; 20N - 20 mg of narasin/kg of DM; 27N - 27 mg of narasin/kg of DM. The experiment lasted from 14 to 70 days of lactation. From the second to the tenth week of age the lambs received initial concentrate (57.0% corn; 25.0% soybean meal; 1.5% limestone; 1.5% of mineral mix; 5.0% of sugarcane molasses and 10% of milk replacer; composition: DM=89.3%; CP = 21.1%; FDN = 8.9%; FDA=2.7%) (ad libitum) in a private feeder. All data were analyzed using the...
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This study evaluated the effects of ADG on number of pulses, amplitude and concentration of LH in pre-pubertal early-weaned heifers. Twenty ½Angus x ½Nellore were weaned (86±3 d of age and 91±1 kg BW), and allocated in 2×2 factorial... more
This study evaluated the effects of ADG on number of pulses, amplitude and concentration of LH in pre-pubertal early-weaned heifers. Twenty ½Angus x ½Nellore were weaned (86±3 d of age and 91±1 kg BW), and allocated in 2×2 factorial design. Heifers were submitted to high (H) and medium (M) ADG in two periods. The first period occurred from 3 to 7 mo and the second from 7 mo to puberty (HH, HM, MH and MM). Diets in the first (CP 19%, NDF 24% and TDN 79%) and second periods (CP 14%, NDF 24% and TDN 78 %) were the same for all treatments, but the amount was controlled to get the ADG. Weekly, heifers were weighed and puberty status assessed by US. Serial blood samples were collected every 15 min for 12h at 6.5, 9.5 and 11.5 mo of age. The data were evaluated using SAS. The ADG was higher in H than M group in the first period (0.99±0.06 kg vs. 0.51±0.04 kg). In the second period, the ADG was 0.81±0.03 (HH), 0.5±0.03 (HM), 1.0±0.04 (MH) and 0.68±0.03 (MM). At 6.5 mo of age, heifers in H h...
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This study evaluated the frequency of narasin supplementation on ruminal fermentation in lambs. Four male lambs (castrated and cannulated in the rumen) were used in a 4 x 4 Latin square experimental design. The experimental diets... more
This study evaluated the frequency of narasin supplementation on ruminal fermentation in lambs. Four male lambs (castrated and cannulated in the rumen) were used in a 4 x 4 Latin square experimental design. The experimental diets consisted of 95% coastcross hay (16% CP) and 5% ground corn (DM basis), used as the delivery vehicle for the narasin. The diet was fed daily. The treatments were: C (no additives), N24: narasin offered every 24 hours at 13 ppm; N48: narasin offered every 48 hours, being 26 ppm offered on the first day and ground corn without narasin on the second day; N72: narasin offered every 72 hours, being 39 ppm offered on the first day and ground corn without narasin on the second and third days. The trial lasted 4 periods of 36 days each. Between the 31st to 36th days of each period, the rumen fluid was collected (hours 0; 6 and 12). All data were analyzed using the MIXED procedure of SAS and the treatments were compared through the Tukey test at 5% probability. Ther...
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Fifty-eight Dorper x Santa Inês ram lambs (initial BW 20.7 ± 1.19 kg and 75 ± 10.83 d old) were assigned to a randomized complete block design to evaluate the effects of fiber content on ruminal and cecal pH and SCFA. The treatments were... more
Fifty-eight Dorper x Santa Inês ram lambs (initial BW 20.7 ± 1.19 kg and 75 ± 10.83 d old) were assigned to a randomized complete block design to evaluate the effects of fiber content on ruminal and cecal pH and SCFA. The treatments were defined by the fiber (“Coastcross” hay) content in diets (CP: 16,12% ± 0.92): 0F: no forage diet (NDF: 10.4%); 5F: 5% of forage (NDF: 12.1%); 10F: 10% of forage (NDF: 15%); 15F: 15% of forage (NDF: 15.5%); 20F: 20% of forage (NDF: 20.8%) and 25F: 25% of forage (NDF: 23.5%). The experiment lasted 89 days, at the end of the experiment the lambs were slaughtered without fasting. The forage inclusion linear decreased ruminal concentration of propionate (0F: 45.4; 5F: 39.7; 10F: 41.5; 15F: 39.4; 20F: 35.3; 25F: 30.5 mM/100mM; P < 0.01) and total SCFA (0F: 106.6; 5F: 96.4; 10F: 84.2; 15F: 90.6; 20F: 63.0; 25F: 71.2 mM; P = 0.01) and increased the ruminal concentration of acetate (0F: 43.4; 5F: 45.3; 10F: 47.8; 15F: 49.8: 20F: 51.8; 25F: 57.2 mM/100mM; ...
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The objective of this study was to determinate the effects of forage levels and narasin inclusion on the performance of feedlot lambs. Forty-four lambs were allotted in a randomized complete block design, defined by initial body weight... more
The objective of this study was to determinate the effects of forage levels and narasin inclusion on the performance of feedlot lambs. Forty-four lambs were allotted in a randomized complete block design, defined by initial body weight (BW), in a 2x2 factorial arrangement. The first factor was forage (coastcross hay) inclusion (10 or 20%, DM basis) and the second factor was narasin (0 or 13 ppm). The experimental diets were isonitrogenous (17.4%, DM basis). The experiment lasted 112 days, divided into two periods of 56 d each. The lambs were weighed after a fasting period of 14 hours on days 0, 56, and 112. Average daily gain (ADG), dry matter intake (DMI) and feed efficiency (FE) were determined in each period. Data were analyzed as repeated measures over time using the MIXED procedure of SAS and the LSMEANS option was used to obtain the means. The effects were considered significant when P < 0.05. There was no interaction between forage levels and narasin inclusion. Narasin did...
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The objective of this study was to define the ideal level of narasin to be used in diets for lactating ewes. Forty Dorper vs. Santa Inês ewes (53.6 ± 9.6 kg BW and 14 d in milk) were penned individually and used in a complete randomized... more
The objective of this study was to define the ideal level of narasin to be used in diets for lactating ewes. Forty Dorper vs. Santa Inês ewes (53.6 ± 9.6 kg BW and 14 d in milk) were penned individually and used in a complete randomized block design. Ewes were fed a basal diet (16.77 ± 0.35% CP) containing 50% concentrate and 50% coastcross hay. The treatments were: 0N - control diet; 13N - 13 mg of narasin/kg of DM; 20N - 20 mg of narasin/kg of DM; 27N - 27 mg of narasin/kg of DM. Ewes were fed the diets from the wk 2 to 10 of lactation. Milk production was determined every 7 d during the experiment. Ewes were separated from lambs and mechanically milked for emptying of the mammary gland. After 3 hours, using the same procedure, milk production was recorded and samples collected for milk composition analysis. For DMI, there was a quadratic effect of treatments (0N=2.417; 13N=2.491; 20N=2.334; 27N=2.078 kg/d; P = 0.02). The milk production (g/3h) presented a quadratic response to le...
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The objectives of this trial were to evaluate the effects of levels of fiber in high-grain diets on carcass characteristics of feedlot lambs. Fifty-eight Dorper x Santa Inês ram lambs (initial BW 20.7 ± 1.19 kg and 75 ± 10.83 d old) were... more
The objectives of this trial were to evaluate the effects of levels of fiber in high-grain diets on carcass characteristics of feedlot lambs. Fifty-eight Dorper x Santa Inês ram lambs (initial BW 20.7 ± 1.19 kg and 75 ± 10.83 d old) were assigned to a randomized complete block design. The treatments were defined by the fiber (“Coastcross” hay) content in the diets (CP: 16,12% ± 0.92): 0F: no forage diet (NDF: 10.4%); 5F: 5% of forage (NDF: 12.1%); 10F: 10% of forage (NDF: 15.0%); 15F: 15% of forage (NDF: 15.5%); 20F: 20% of forage (NDF: 20.8%) and 25F: 25% of forage (NDF: 23.5%). The experiment lasted 89 days, at the end of this time, the animals were slaughtered (169 ± 10.83 d old) to evaluate carcass characteristics. There was a quadratic response for slaughter BW (0F: 46.3; 5F: 48.1; 10F: 49.4; 15F: 50.3; 20F: 48.5; 25F: 43.3 kg; P < 0.01), hot carcass weight (0F: 24.8; 5F: 25.6; 10F: 26.0; 15F: 25.7; 20F: 24.3; 25F: 21.8 kg; P = 0.01), cold carcass weight (0F: 24.3; 5F: 25.1;...
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High-grain diets have been used with great success in the feedlot systems for lambs production in Brazil. Then it became important to define the ideal dietary fiber content in the diet when the goal is to produce heavy lambs for early... more
High-grain diets have been used with great success in the feedlot systems for lambs production in Brazil. Then it became important to define the ideal dietary fiber content in the diet when the goal is to produce heavy lambs for early slaughter. The objective in this trial was to evaluate the levels of fiber on performance of lambs feed high-grain diet. Fifty-eight Dorper x Santa Inês ram lambs (initial BW 20.7 ± 1.19 kg and 75 ± 10.83 d old) were assigned to a randomized complete block design. The treatments were defined by the fiber (“Coastcross” hay) content in diets (CP: 16,12% ± 0.92): 0F: no forage diet (NDF: 10.4%); 5F: 5% of forage (NDF: 12.1%); 10F: 10% of forage (NDF: 15%); 15F: 15% of forage (NDF: 15.5%); 20F: 20% of forage (NDF: 20.8%) and 25F: 25% of forage (NDF: 23.5%). The experiment lasted 89 days and lambs were weighted after 16 hours fasting on days 0, 31, 57 and 89. DMI, ADG and FE were determined in each period. There was no interaction effect between diets and p...