INGESTIVE BEHAVIOR AND PHYSIOLOGICAL RESPONSES OF NELLORE IN DIFFERENT GRAZING CONDITIONS

Authors

  • Cleiton Luiz Tonello Universidade Estadual de Maringá - UEM
  • Leonir Bueno Ribeiro Universidade Estadual de Maringá
  • Orlando Rus Barbosa Universidade Estadual de Maringá
  • Carla Franciele Höring Universidade Estadual de Londrina
  • Eisler Bernard Zanella Pontifícia Universidade Católica do Paraná - PUCPR
  • Carlos Eduardo Furtado Universidade Estadual de Maringá

DOI:

https://doi.org/10.5216/cab.v13i3.7132

Keywords:

Beef cattle

Abstract

This study aimed to evaluate the ingestive behavior and physiological responses of steers under different grazing conditions. Five Nellore steers, weighing an average of 390.78 ± 14 kg BW, were assigned to five experimental treatments: clean pasture without concentrate supplementation (PLSC), dirty pasture without concentrate supplementation (PSSC), clean pasture with concentrate supplementation (PLCC), dirty pasture with concentrate supplementation (PSCC) and free access to pasture without concentrate supplementation (LAPSC). The experimental design was a 5 x 5 Latin Square. The grazing behavior was measured through visual observation at the end of each trial in ten-minute intervals for 24 hours, and the physiological variables comprised rectal temperature, respiratory rate and heart rate. The physiological responses of animals were not affected by treatments. The number of steps performed by the animals kept in treatments PLSC (6.08 steps/min) and PLCC (5.62 steps/min) were significantly lower than those in treatments PSSC (16.84 steps/min) and PSCC (14.58 steps/min), showing increased activity of locomotion in animals in paddocks with weeds.

KEYWORDS: heart rate; locomotion; pasture; weeds.

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Author Biographies

Cleiton Luiz Tonello, Universidade Estadual de Maringá - UEM

Programa de pós-graduação em Zootecnia da Universidade Estadual de Maringá – UEM.Rua Major Oscar Ramos Pereira, 346, Vila Tolentino, Cascavel PR, CEP 85.802-300 Fone: (45) 9987-7069

Leonir Bueno Ribeiro, Universidade Estadual de Maringá

Programa de pós-graduação em Zootecnia da Universidade Estadual de Maringá – UEM.

Orlando Rus Barbosa, Universidade Estadual de Maringá

Departamento de Zootecnia, Universidade Estadual de Maringá – UEM. Av. Colombo, 5790, 87020-900, Maringá.

Carla Franciele Höring, Universidade Estadual de Londrina

Programa de pós-graduação em Agronomia da Universidade Estadual de Londrina – UEL.

Eisler Bernard Zanella, Pontifícia Universidade Católica do Paraná - PUCPR

Médico veterinário pela PUCPR.

Carlos Eduardo Furtado, Universidade Estadual de Maringá

Departamento de Zootecnia, Universidade Estadual de Maringá – UEM. Av. Colombo, 5790, 87020-900, Maringá.

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Published

2012-09-28

How to Cite

TONELLO, C. L.; RIBEIRO, L. B.; BARBOSA, O. R.; HÖRING, C. F.; ZANELLA, E. B.; FURTADO, C. E. INGESTIVE BEHAVIOR AND PHYSIOLOGICAL RESPONSES OF NELLORE IN DIFFERENT GRAZING CONDITIONS. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 13, n. 3, p. 282–289, 2012. DOI: 10.5216/cab.v13i3.7132. Disponível em: https://revistas.ufg.br/vet/article/view/7132. Acesso em: 13 may. 2024.

Issue

Vol. 13 No. 3 (2012)

Section

Animal Production

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