Pilot study investigating estrus length and estrus behavior in Norwegian Red cattle on a commercial dairy farm

Frontiers in Veterinary Science

Veterinary Science

Elisabeth Kommisrud¹  Adam Dunstan Martin²  Maien Munthe-Kaas²  Ingrid Hunter Holmøy²  Caroline Sorknes Haadem²  Guro Sveberg³ 

[1] Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway;Department of Production Animal Clinical Sciences, Norwegian University of Life Sciences, Ås, Norway;GENO Breeding and AI Association, Hamar, Norway;

关键词: Norwegian Red;    estrus behavior;    estrus duration;    estrus intensity;    dairy cow;   

DOI  :  10.3389/fvets.2023.1219001

 received in 2023-05-08, accepted in 2023-08-28,  发布年份 2023

来源: Frontiers

【 摘 要 】

IntroductionNorwegian Red has been shown to have high levels of estrus behavior under experimental conditions. However, the estrus behaviors of Norwegian Red cows have not been studied under commercial conditions.MethodsA herd of 89 Norwegian Red cows housed in free stalls on concrete, slatted floors, were continuously video monitored for 21 days. Ovarian cyclicity was confirmed in a final study sample group (n = 18) using milk progesterone concentrations. All mounting and standing activities were recorded, and the duration of mount estrus, standing estrus and the differences between these; prestand and poststand, were determined. The cycle stages metestrus, diestrus and proestrus were estimated based on the starting time and ending time of mount estrus.ResultsAll cows in the final study sample group exhibited the primary estrus sign, ‘standing to be mounted’ during estrus. Two (11%), eleven (61%) and six (33%) cows exhibited the behavior ‘standing to be mounted’ during metestrus, diestrus and proestrus, respectively. The number of mounts initiated by individual cows was higher during mount and stand estrus than during the rest of the estrous cycle. This study reports a median duration of mount estrus and stand estrus of 21.0 h (interquartile range (IQR) 15.0 to 27.3) and 14.3 h (IQR 12.0 to 18.8), respectively. The median counts per hour of all mount behaviors were 8.6 (IQR 5.6 to 11.3), 1.51 (IQR 0.3 to 3.8) and 1.7 (IQR 0.8 to 6.0) for standing estrus, prestand and poststand, respectively.DiscussionThis study shows that under commercial conditions the Norwegian Red cow displays a high level of mount and stand activity associated with estrus.

【 授权许可】

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Copyright © 2023 Munthe-Kaas, Sveberg, Holmøy, Kommisrud, Haadem and Martin.