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de Paula C, Rennó LN, Ferreira MFDL, Moreira SS, Martins HC, Rodrigues II, Detmann E, Valadares Filho SDC, Paulino MF. Does Parity Influence the Magnitude of the Stress Response of Nellore Cows at Weaning? Animals (Basel) 2023; 13:ani13081321. [PMID: 37106884 PMCID: PMC10135217 DOI: 10.3390/ani13081321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/23/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023] Open
Abstract
Most studies investigate the impact of stress at weaning on calves; however, little is known about the responses of cows, and whether they would differ according to parity. This study aims to investigate whether parity would influence the weaning stress response in beef cows. Thirty pregnant Nellore cows with their respective calves were randomly allocated to five paddocks and two females from each parity group were placed in the paddocks. There was an interaction (p < 0.05) between parity and evaluation days regarding cortisol, where on d + 7, the higher concentration was observed for multiparous cows. There was an interaction (p < 0.05) between parity and evaluation day for red blood cells (RBC), hematocrit (HCT), and hemoglobin (HB), whereby higher RBC counts on d + 4 were observed for multiparous cows. For HCT and HB, on all post-weaning collection days, higher values were observed for multiparous cows. The day of evaluation had an (p < 0.05) effect on all recorded behaviors, except for rumination (p > 0.05). Nellore cows, regardless of parity, underwent behavioral and physiological changes on abrupt weaning. Physiological parameters indicated that the magnitude of stress was greater in multiparous cows.
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Affiliation(s)
- Camila de Paula
- Department of Animal Science, Universidade Federal de Viçosa, Peter Henry Rolfs Avenue, Viçosa 36570-900, Brazil
| | - Luciana Navajas Rennó
- Department of Animal Science, Universidade Federal de Viçosa, Peter Henry Rolfs Avenue, Viçosa 36570-900, Brazil
| | - Matheus Fellipe de Lana Ferreira
- Eastern Oregon Agricultural Research Center, Department of Animal and Rangeland Sciences, Oregon State University, Burns, OR 97720, USA
| | - Samira Silveira Moreira
- Department of Animal Science, Universidade Federal de Viçosa, Peter Henry Rolfs Avenue, Viçosa 36570-900, Brazil
| | - Hudson Caio Martins
- Department of Animal Science, Universidade Federal de Viçosa, Peter Henry Rolfs Avenue, Viçosa 36570-900, Brazil
| | - Isabela Iria Rodrigues
- Department of Animal Science, Universidade Federal de Viçosa, Peter Henry Rolfs Avenue, Viçosa 36570-900, Brazil
| | - Edenio Detmann
- Department of Animal Science, Universidade Federal de Viçosa, Peter Henry Rolfs Avenue, Viçosa 36570-900, Brazil
| | | | - Mário Fonseca Paulino
- Department of Animal Science, Universidade Federal de Viçosa, Peter Henry Rolfs Avenue, Viçosa 36570-900, Brazil
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Lopes SA, Ferreira MFDL, Silva LFCE, Prados LF, Rodrigues II, Rennó LN, Siqueira GR, Filho SDCV. Evaluation of nonlinear models to predict milk yield and composition of beef cows: a meta-analysis. Anim Feed Sci Technol 2022. [DOI: 10.1016/j.anifeedsci.2022.115455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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