Revista Brasileira de Zootecnia

The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.

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Revista Brasileira de Zootecnia

The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.

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Revista Brasileira de Zootecnia

The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.

  • About
    • History
    • Focus and scope
    • Editorial policies
    • Editorial board
    • Editorial team
  • Available issues
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    • Instructions to authors
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Volume 44, Issue 5, 2015

Performance and immunological resistance of Litopenaeus vannamei fed a β-1,3/1,6-glucan-supplemented diet after per os challenge with the Infectious myonecrosis virus (IMNV)

Hassan Sabry Neto, Alberto Jorge Pinto Nunes

01/May/2015

Performance and immunological resistance of Litopenaeus vannamei fed a β-1,3/1,6-glucan-supplemented diet after per os challenge with the Infectious myonecrosis virus (IMNV)

Hassan Sabry Neto, Alberto Jorge Pinto Nunes

DOI: 10.1590/S1806-92902015000500001

This study determined the efficacy of a β-1,3/1,6-glucan source on the survival, growth, and immunological responses of Litopenaeusvannamei challenged with infectious myonecrosis virus (IMNV). The work was conducted in 20 tanks of 500 L with clear water with constant recirculation and aeration. Shrimp weighing 2.6±0.4 g were stocked at 100 animals/m2 and reared for 10 weeks. Viral challenge occurred through oral administration of IMNV positive extract (1.82 £ × 103 copies of IMNV/µL RNA) during three consecutive days, twice a […]

Keywords: betaglucan; shrimp

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Inbreeding on productive and reproductive traits of dairy Gyr cattle

João Cruz Reis Filho, Rui da Silva Verneque, Robledo de Almeida Torres, Paulo Sávio Lopes, Fernanda Santos Silva Raidan, Fabio Luiz Buranelo Toral

01/May/2015

Inbreeding on productive and reproductive traits of dairy Gyr cattle

João Cruz Reis Filho, Rui da Silva Verneque, Robledo de Almeida Torres, Paulo Sávio Lopes, Fernanda Santos Silva Raidan, Fabio Luiz Buranelo Toral

DOI: 10.1590/S1806-92902015000500002

The objective of this study was to estimate genetic parameters and to evaluate the effects of inbreeding on productive and reproductive traits of dairy Gyr cattle. Single-trait animal models were used to estimate genetic parameters and solutions for inbreeding coefficients for milk (milk 305-d), fat (fat 305-d), protein (protein 305-d), lactose (lactose 305-d), and total solids (TS 305-d) yield up to 305 days of lactation, days in milk (DIM), age at first calving (AFC) and calving intervals (CI). The mean […]

Keywords: dairy cattle; genetic parameter; heritability; inbreeding depression

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2,6-Diaminopimelic acid (DAPA) in microbial protein quantification of heifers fed different forage sources

Cristovão Colombo de Carvalho Couto Filho, Eloísa de Oliveira Simões Saliba, Norberto Mario Rodriguez, Geraldo Sérgio Senra Carneiro Barbosa, Regeane Martins de Freitas, Matheus Pinheiro Diniz Resende

01/May/2015

2,6-Diaminopimelic acid (DAPA) in microbial protein quantification of heifers fed different forage sources

Cristovão Colombo de Carvalho Couto Filho, Eloísa de Oliveira Simões Saliba, Norberto Mario Rodriguez, Geraldo Sérgio Senra Carneiro Barbosa, Regeane Martins de Freitas, Matheus Pinheiro Diniz Resende

DOI: 10.1590/S1806-92902015000500003

The objective of this study was to evaluate the flow of nitrogenous compounds, protein degradability, rumen degradation of total carbohydrate and organic matter and microbial efficiency in heifers subjected to diets containing corn silage, sugarcane or Tifton. For this purpose, the 2,6-diaminopimelic acid (DAPA) technique was adopted and analytical procedures for amino acids by HPLC were adapted. Six rumen-fistulated Holstein-Zebu heifers with 480 kg of initial BW and at 24 months of age kept in individual tie stalls were assigned […]

Keywords: corn silage; flow of nitrogen compounds; HPLC; microbial efficiency; protein degradability; sugarcane

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Analysis of daily body weight of dairy cows in early lactation and associations with productive and reproductive performance

Jessica Karina Poncheki, Maria Luíza Schultz Canha, Sandro Luiz Viechnieski, Rodrigo de Almeida

01/May/2015

Analysis of daily body weight of dairy cows in early lactation and associations with productive and reproductive performance

Jessica Karina Poncheki, Maria Luíza Schultz Canha, Sandro Luiz Viechnieski, Rodrigo de Almeida

DOI: 10.1590/S1806-92902015000500004

The objective of this study was to describe daily body weight (BW) changes in the first 100 days of lactation in confined dairy cows and to associate BW loss with productive and reproductive performance. Data included 26,344 daily BW measurements of 372 Holsteins calving between June 2011 and June 2012 in a commercial herd in the South of Brazil. Cows were automatically weighed and were assigned according to parity. Individual measurements were smoothed using cubic splines, generating nadir BW, days […]

Keywords: body weight loss; milk production; pregnancy ratio; transition period

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Slow-release urea in diets for lactating crossbred cows

Bruno Tadeu Santiago, Severino Delmar Junqueira Villela, Fernando de Paula Leonel, Joanis Tilemahos Zervoudakis, Raphael Pavesi Araújo, Henrique Valentim Nunes Machado, [...]

01/May/2015

Slow-release urea in diets for lactating crossbred cows

Bruno Tadeu Santiago, Severino Delmar Junqueira Villela, Fernando de Paula Leonel, Joanis Tilemahos Zervoudakis, Raphael Pavesi Araújo, Henrique Valentim Nunes Machado, [...]

DOI: 10.1590/S1806-92902015000500005

The objective of this study was to evaluate the performance of F1 (Holstein × Zebu) cows in lactation according to different levels of substitution of soybean meal for a protein equivalent non-protein nitrogen originated from slow-release urea (SRU). Eight F1 (Holstein × Zebu) cows in the first third of lactation, with an average milk yield of 12.7 kg (±3.1 kg)/day and a live weight of 552 kg (±30 kg), were used. The experimental design was composed of two simultaneous 4 […]

Keywords: digestibility; intake; milk composition; soybean meal

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amino acids beef cattle Brachiaria decumbens carcass dairy cattle digestibility feedlot growth heritability intake Nellore nutrition Pennisetum purpureum performance pH protein sheep swine urea weight gain

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ISSN: 1516-3598 (printed version from 1997 to 2009)

e-ISSN: 1806-9290

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