Related Experiment Video
Updated: Aug 1, 2025

Using Chronic Social Stress to Model Postpartum Depression in Lactating Rodents
Published on: June 10, 2013
Does Parity Influence the Magnitude of the Stress Response of Nellore Cows at Weaning?
Camila de Paula1, Luciana Navajas Rennó1, Matheus Fellipe de Lana Ferreira2
1Department of Animal Science, Universidade Federal de Viçosa, Peter Henry Rolfs Avenue, Viçosa 36570-900, Brazil.
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.
More Related Videos
09:12Assessing Cellular Stress and Inflammation in Discrete Oxytocin-secreting Brain Nuclei in the Neonatal Rat Before and After First Colostrum Feeding
Published on: November 14, 2018
07:46Author Spotlight: Improving Beef Cattle Nutrition and Production with a Focus on Feed Efficiency and Meat Quality Traits Through Advanced Biochemical and Molecular Assays
Published on: July 12, 2024
Related Concept Videos
Stress Response System
Alarm stage
In the alarm stage, the body's...
Stress Concentrations
The stress...
Physiological Foundation of Stress
Role of the Sympathetic Nervous System
Adrenaline triggers the...
Shearing Stress
The average shearing stress can be calculated by dividing the shear by the area of the cross-section.
Stress: General Loading Conditions
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
Responses to Salt Stress