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Registros recuperados: 7
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Effect of breed and corpus luteum on pregnancy rate of bovine embryo recipients R. Bras. Zootec.
Nogueira,Ériklis; Cardoso,Gabriel Saravi; Marques Junior,Heitor Romero; Dias,Alexandre Menezes; Ítavo,Luís Carlos Vinhas; Borges,Juliana Corrêa.
The objective of this study was to evaluate pregnancy rates of recipients of different breed groups (Nellore and crossbreed), as well as the effects of size and type of the corpus luteum (CL) on plasmatic concentrations of progesterone and pregnancy rates of embryo recipients. A total of 152 heifers were synchronized with progesterone implants and on the day of embryo transfer, previously obtained by superovulation and frozen in ethylene glycol, the diameter and type of the corpus luteum (cavitary and compact) was measured and blood was collected for progesterone measurement. The pregnancy rate was 44.1%, with a diameter of corpus luteum higher in recipients that became pregnant (2.03±0.41) compared with non-pregnant ones (1.86±0.34 cm). Plasmatic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cavitary corpus luteum; Nellore; Progesterone; Ultrasound.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900022
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Efficiency of calf production of cows from two genetic groups R. Bras. Zootec.
Ítavo,Luís Carlos Vinhas; Euclides Filho,Kepler; Torres Júnior,Roberto Augusto de Almeida; Ítavo,Camila Celeste Brandão Ferreira; Nogueira,Ériklis; Dias,Alexandre Menezes.
The objective was to evaluate the effect of weight, age and production efficiency of cows from genetic groups based on the calf weight at calving and at weaning. For a period of five years, data of 120 cows (60 Angus-Nellore (AN) and 60 Simmental-Nellore (SN)) at four to nine-years of age were evaluated. All cows were maintained on Brachiaria decumbens pastures, with two forage availability levels (high and low), distributed in a randomized-block design. The cows were placed together with Canchim bulls to generate the crossbred calves. A supplement, consisting of 200 g/kg crude protein and 820 g/kg of total digestible nutrients, was provided to the calves in creep feeding until 210 days-old (weaning). Supplement had a significant effect on the weight of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Body size; Calf performance; Crossbreed; Efficiency.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000700390
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Follicular dynamics and production of oocytes in young Nellore heifers with energetic supplementation R. Bras. Zootec.
Nogueira,Ériklis; Silva,Ailson Sebastião da; Amaral,Thaís Basso; Ítavo,Luís Carlos Vinhas; Dias,Alexandre Menezes; Mingoti,Gisele Zoccal.
To verify the effects of energy supplementation and fat on follicular dynamics, metabolic profile and the production of oocytes, 15 young heifers (Bos taurus indicus) with an average age of 14 months and with an initial weight of 256.35 kg were assigned to two treatments according to weight and follicular population as evaluated by ultrasonography: in T1 (1.0 × M), animals received 100% of the energy requirements for maintenance; in T2 (1.7 × M), animals received 170% of the energy requirements for maintenance, achieved by the addition of 200 g of Megalac®. After a period of adaptation to the diet, the treatments, blood collection and follicular aspirations were started using a randomized design. The dry matter intake and weight gain were lower in the 1.0...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Metabolic profile; Nutrition and reproduction; OPU.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900007
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Pregnancy rate in lactating Bos indicus cows subjected to fixed-time artificial insemination and treated with different follicular growth inducers R. Bras. Zootec.
Nogueira,Ériklis; Batista,Dayanna Schiavi do Nascimento; Costa Filho,Luiz Carlos Cesar da; Dias,Alexandre Menezes; Silva,Juliana Corrêa Borges; Ítavo,Luís Carlos Vinhas.
The objective of this experiment was to evaluate the effects of replacing eCG with FSH or FSH/LH on the diameter of ovulatory follicles (DOF) and the pregnancy rates (PR) of lactating Bos indicus cows subjected to a synchronization of ovulation protocol and fixed-time artificial insemination (FTAI) based on progesterone, estradiol benzoate (EB), PGF2α, and estradiol cypionate (EC). On day 0, primiparous and multiparous Nellore cows (n = 329) at 68 days postpartum were body condition scored (BCS) and received a P4 implant (PRIMER 1.0 g P4) plus 2 mg EB intramuscularly (IM). At day 8, the implant was removed, and 250 μg cloprostenol were injected IM along with 0.5 mg EC. At the time of implant removal, the animals were divided into one of four treatments:...
Tipo: Info:eu-repo/semantics/article Palavras-chave: FSH; Multiparous; Nellore; Primiparous.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000700358
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Proposta de Critério de Alocação de Custos Indiretos na Pecuária Bovina de Ciclo Completo Rev. Econ. Sociol. Rural
Aranha,José Aparecido Moura; Dias,Alexandre Menezes; Ítavo,Luís Carlos Vinhas.
Resumo: Tradicionalmente, a contabilidade faz o rateio dos custos indiretos na atividade pecuária bovina de ciclo completo com base no custo unitário por animal (cabeça). Por esse critério, o valor de custo atribuído a um bezerro é o mesmo para um animal adulto (vaca), o que sugere não ser o critério mais adequado. O uso de insumos agropecuários, o consumo de alimentos e a compra e venda de animais ocorrem em função do peso corporal. Desenvolver um critério de rateio que permite distribuir os custos de produção ao rebanho levando em conta o peso corporal seria o mais adequado. Propor o rateio dos custos indiretos da atividade da pecuária bovina de ciclo completo com base na Unidade Animal (U.A.) é o objetivo deste trabalho, uma vez que ela permite...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Contabilidade da pecuária bovina; Rateio de custos; Custos indiretos..
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-20032016000400653
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Ruminal parameters of bovines fed diets based on sugar cane with doses of calcium hydroxide R. Bras. Zootec.
Dias,Alexandre Menezes; Ítavo,Luís Carlos Vinhas; Damasceno,Julio Cesar; Santos,Geraldo Tadeu dos; Nogueira,Ériklis; Ítavo,Camila Celeste Brandão Ferreira.
The objective of this study was to evaluate the administration of different doses of calcium hydroxide mixed with sugar cane fed to cows by the pH, ammonia nitrogen and volatile fatty acids concentration in ruminal content. Four cows with fistulated rumen were distributed in a Latin square (4 × 4) in split plot. The treatments involved adding doses of 0, 8, 16 and 24 g/kg of calcium hydroxide to sugar cane in natura. Samples of rumen fluid were collected and the pH and concentration of N-NH3 was determined before (time zero) and 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12 hours after the feeding time. The concentration of volatile fatty acids at 0, 3, 6, 9 and 12 hours was also determined. The calcium hydroxide contributed to maintain the pH of rumen fluid...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ammonia nitrogen; Ruminal pH; Saccharum officinarum; VFA.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400019
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Sugar cane treated with calcium hydroxide in diet for cattle: intake, digestibility of nutrients and ingestive behaviour R. Bras. Zootec.
Dias,Alexandre Menezes; Ítavo,Luís Carlos Vinhas; Damasceno,Julio Cesar; Santos,Geraldo Tadeu dos; Ítavo,Camila Celeste Brandão Ferreira; Silva,Fabiano Ferreira da; Nogueira,Ériklis; Soares,Cláudia Muniz.
The objective of this work was to evaluate, in bovines, the intake and apparent digestibility of nutrients, ingestive behaviour and content of total digestible nutrients (TDN) of diets based on sugar cane treated with calcium hydroxide. It was used four cows with average body weight of 412.06 kg ± 37.3 kg. The study included inclusion of calcium hydroxide at the doses 0, 8, 16 and 24 g/kg of sugar cane in natural matter basis fed in diets with 65% of roughage and 35% on concentrate, based on dry matter (DM). It was used a 4 × 4 Latin square experimental design with four treatments and four periods. Calcium hydroxide doses affected nutrient intake: DM intake was 7.88 kg/day at the dose of 14.99 g of calcium hydroxide, organic matter (OM) intake was 6.75...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alkaline hydrolysis; Chemical treatment; Hydrated lime; Ruminant nutrition.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000800025
Registros recuperados: 7
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