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Now showing items 31-40 of 1900
Estimates of covariance functions for growth from birth to 630 days of age in Nelore cattle
(Journal Of Animal Science, 2001) [Artigo]
Weight records of Brazilian Nelore cattle, from birth to 630 d of age, recorded every 3 mo, were analyzed using random regression models. Independent variables were Legendre polynomials of age at recording. The model of ...
Taxa de deposição de tecidos corporais de novilhas Nelore e suas cruzas com Angus e Simental
(Revista Brasileira de Saúde e Produção Animal, 2012-04-01) [Artigo]
The objective of this work was to evaluate deposition pattems of body tissues of Nellore and crossbreed with Angus and Simmental heifers. Fifty seven heifers (19 Nellore, 19 Angus and 19 Simmental) were used, being 12 ...
Potencialidades da utilização de taninos na conservação de forragens e nutrição de ruminantes-revisão
(Archives of Veterinary Science, 2007-11-21) [Artigo]
This review present a discussion abouth the tannins. The tannins are compounds that have the ability to bind other macromolecules, reducing their availability to animal metabolism. This characteristic can be benefic or ...
Fisiologia do estresse calórico e a utilização de eletrólitos em frangos de corte
(Ciência Rural, 2003-10-01) [Artigo]
Várias alterações metabólicas e fisiológicas são desencadeadas em frangos de corte submetidos a altas temperaturas ambientais, o que pode acarretar em grandes perdas no desempenho e na imunocompetência destas aves. Além ...
Stocking densities and feeding strategies in shrimp and tilapia polyculture in tanks
(Pesquisa Agropecuária Brasileira, 2013-08-01) [Artigo]
The objective of this work was to evaluate the performance of Pacific marine shrimp (Litopenaeus vannamei) and tilapia (Oreochromis niloticus), in a polyculture in tanks subjected to different stocking densities and feeding ...
Valor energético do óleo ácido de soja para aves
(Pesquisa Agropecuária Brasileira, 2005-03-01) [Artigo]
A escassez de valores confiáveis de energia metabolizável tem limitado o uso do óleo ácido de soja como fonte de energia, nas rações de aves. O objetivo deste trabalho foi verificar o efeito da idade da ave e do método de ...
Ruminal degradability of neutral detergent fiber of Cynodon spp. grasses at four regrowth ages
(Acta Scientiarum: Animal Sciences, 2014-06-01) [Artigo]
The aim of this work was to determine ruminal degradation of neutral detergent fiber of grasses of the genus Cynodon, harvested at four cutting ages. It was used a randomized block design, with five treatments arranged in ...
Manure production and mineral excretion in feces of gilts fed ractopamine
(Acta Scientiarum: Animal Sciences, 2013-09-01) [Artigo]
A study was conducted to evaluate the feces+urine produced per animal (FUPA), dry matter, mineral matter, organic matter, nitrogen, phosphorus, potassium and sulfur in feces of gilts fed diets with increasing levels of ...
Comparação de modelos não-lineares para descrever o crescimento de fêmeas da raça Guzerá
(Pesquisa Agropecuária Brasileira, 2000-09-01) [Artigo]
Dados de crescimento e reprodução de 573 vacas da raça Guzerá, nascidas entre 1961 e 1985, na Fazenda Canoas, em Curvelo, MG, foram analisados com o objetivo de estabelecer um padrão médio de crescimento, mediante o uso ...
Models for the analysis of growth curves for rearing tinamous (Rhynchotus rufescens) in captivity
(Brazilian Journal of Poultry Science, 2007-03-01) [Artigo]
Growth curves models provide a visual assessment of growth as a function of time, and prediction body weight at a specific age. This study aimed at estimating tinamous growth curve using different models, and at verifying ...