Influence of walking and running exercise on plasma concentrations of stress hormones and other traits, the number of blood cells and phagocytic cell functions in dry cows

石黒, 裕敏; 沼辺, 孝

doi:10.2508/chikusan.81.363

Cited by 1 publication

(2 citation statements)

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“…Research has suggested that, in humans, walking exercise activates NK cells and enhances lymphocyte blastogenesis [ 29 ]. In dry cows, the use of walking exercise is also thought to cause temporary increases in the proportion of T cells and in many T cell subsets, which affects the immune function of cows [ 11 ]. Outdoor sunbathing may also be related to the improved immune function in cows during ODA-1h.…”

Section: Resultsmentioning

confidence: 99%

“…However, the effect of outdoor access 1 h per day on lying, one of the AW criteria, is not yet clear [ 6 ]. Previous studies have shown that outdoor access reduces the incidence of foot health problems and parturition-related problems in tethered cows [ 10 ], as well as improving their immune function [ 11 ]. The methods used in these studies involved forcing the cows to exercise.…”

Section: Introductionmentioning

confidence: 99%

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Effects of one hour daily outdoor access on lying and sleeping postures, and immune traits of tethered cows

Huricha¹,

Horaguchi²,

Shiiba³

et al. 2023

Anim Biosci

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Objective: We investigated the effects of outdoor access for 1 h per day on the animal welfare (AW) of tethered cows, in terms of lying and sleeping postures, and immune function.Methods: A total of five dry cows were tethered all day indoors (tethering) for 30 days and then tethered indoors with 1 h daily outdoor access (ODA-1h) for 30 days. To analyze the effects of ODA-1h, we calculated the total duration and bout frequency per day, and bout duration of lying and sleeping postures during the last five days of each treatment period. We also analyzed the populations of T cells, B cells, and NK cells in peripheral blood mononuclear cells (PBMC) by fluorescence-activated cell sorting, and determined the concanavalin A (Con A) -induced proliferation rate of T cells. Results:The mean total time per day of lying during the ODA-1h treatment was significantly shorter than that during the tethering treatment (p<0.001). The Con A-induced proliferation rate of T cells during the ODA-1h treatment was significantly higher than that during the tethering treatment (p = 0.007). The proportion of NK cells in PBMC during the ODA-1h treatment tended to be higher than that during the tethering treatment (p = 0.062). Conclusion:Although ODA-1h may decrease lying time, it increases the available space for tethered cows towards that typically found in grazing and free barn feeding systems. This increased available space promotes the expression of normal behaviors such as walking and social behaviors except lying, and may also improve the immune function of tethered dry cows, thereby improving their overall welfare.

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Section: Resultsmentioning

confidence: 99%