Talukder, S., Kerrisk, K., Gabai, G., Fukutomi, A., and Celi, P. (2014) Changes in milk oxidative stress biomarkers in dairy cows with ovulatory and anovulatory oestrous cycles. In: [Presented at the 30th Biennial Conference of the Australian Society of Animal Production]. From: 30th Biennial Conference of the Australian Society of Animal Production: Harnessing the Ecology and Physiology of Herbivores, 8-12 September, Canberra, ACT, Australia.

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Abstract

Oxidative stress (OS) can affect a variety of physiological functions in the female reproductive system (Celi, 2011). This study was conducted to evaluate changes in milk profiles of OS biomarkers in dairy cows with ovulatory and anovulatory oestrous cycles. Thirty (11 primiparous and 19 multiparous) healthy, lactating, cycling Holstein Friesian dairy cows averaging 60 ± 17 days in milk, and producing 33 ± 6 kg of milk per day (the week before commencing the study) were enrolled in this study. Composite milk samples were collected thrice weekly and assayed for progesterone (P4) concentration and the following OS biomarkers: superoxide dismutase (SOD), advanced oxidation protein products (AOPP), ceruloplasmin, glutathione (GSH), β-carotene content and glutathione peroxidase (GSH-Px). Individual milk P4 profiles were constructed for each cow to characterise ovarian activity so that cows’ oestrus cycles could be identified as ovulatory (n = 20) or anovulatory (n =10). Cows were assessed for body condition score (BCS) and locomotion score (LS) weekly. Differences in OS biomarkers were compared between two groups (ovulatory vs. anovulatory) using linear mixed models (LMM) with cow identification number being a random factor. A series of separate LMM were fitted to each of the OS biomarkers specifying the fixed effects of BCS, LS, lactation number, daily milk production, days in milk, and body weight.

Item ID:	86263
Item Type:	Conference Item (Abstract / Summary)
Date Deposited:	30 Jul 2025 01:13
FoR Codes:	30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3009 Veterinary sciences > 300902 Veterinary anatomy and physiology @ 100%
SEO Codes:	10 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 1004 Livestock raising > 100402 Dairy cattle @ 100%
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