Relationship between lactational performance and metabolic parameters of Mongolian native grazing mares.
Abstract: Information regarding the lactational performance of mares in relation to metabolic parameters can help practitioners to manipulate animal rearing management for sustainable mare milk production. The aim of this study was to characterize the lactational performance of Mongolian native mares grazing on natural pastureland by revealing the seasonal effects on metabolic parameters. In this study, 8 multiparous mares were used. Milk yield and composition and serum metabolic parameters, such as alanine aminotransferase, aspartate aminotransferase (AST), glucose (GLU), triacylglycerol, total cholesterol (TCH), non-esterified fatty acid (NEFA), albumin, urea, total protein, cortisol (Cort), and insulin, were determined at 30, 60, 90, 120, 150, 180, 210, 240, and 270 days of lactation. During the lactation period, milk yield peaked at around the 90th day and declined sharply in the following period. While the milk fat and protein contents decreased gradually from the early stages of lactation to the late stages, the lactose content was highest at mid-lactation and stayed constant until the end of the lactation period. Meanwhile, changes were observed between the stages of lactation, and the differences in metabolic parameters were significant (P<0.05), except for AST and GLU. The strongest correlation was found with NEFA (P<0.01), followed by the Cort (P<0.05) concentration, with both parameters showing negative correlation, and strong positive correlation was detected between the milk yield and TCH (P<0.05) concentration.
©2021 The Japanese Society of Equine Science.
Publication Date: 2021-09-06 PubMed ID: 34539210PubMed Central: PMC8437754DOI: 10.1294/jes.32.91Google Scholar: Lookup
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Summary
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The research article investigates the lactation performance of Mongolian native mares and its relationship with their metabolic parameters. This knowledge could aid animal rearing management aimed at sustainable mare milk production.
Detailed Explanation
- The researchers sought to understand the lactation performance of Mongolian mares by studying how various seasons affect metabolic parameters associated with lactation. For this, they used a sample of eight multiparous mares.”
- A key objective was to analyze the mares’ metabolic parameters and milk output throughout various stages of lactation (between 30 and 270 days) to discover any potential correlations that could inform more sustainable mare milk production practices.
- The chosen metabolic parameters included alanine aminotransferase, aspartate aminotransferase (AST), glucose (GLU), triacylglycerol, total cholesterol (TCH), non-esterified fatty acid (NEFA), albumin, urea, total protein, cortisol (Cort), and insulin. These parameters can all significantly impact an animal’s metabolic functions and, consequently, lactation performance.
- The study’s findings revealed that milk yield reached a peak around the 90th day of lactation, but sharply declined thereafter. This suggests that the most productive period for mare milk production lies within the first 90 days of lactation.
- The research also found that over the lactation period, the fat and protein content in the milk decreased gradually from the early to the late stages of lactation. On the other hand, lactose content in the milk was observed to be highest at mid-lactation and remained constant through to the end of the lactation period.
- Importantly, the metabolic parameters exhibited significant changes across different stages of lactation. This was true for all parameters except for AST and GLU, indicating their potential relevance in managing mare lactation performance.
- Strong correlations were found between some of the metabolic parameters and lactation performance. NEFA and Cort showed strong negative correlations, suggesting that higher levels of these parameters could potentially hinder lactation performance. Conversely, TCH demonstrated strong positive correlation with milk yield, implying that higher TCH levels might enhance milk production.
Cite This Article
APA
Sandagdorj B, Baigalmaa T, Burenjargal S, Horiuchi M, Enkhdalai M, Bayanbat D, Janchiv D, Jamyandorj O, Ulzii-Orshikh P, Nyam-Osor P.
(2021).
Relationship between lactational performance and metabolic parameters of Mongolian native grazing mares.
J Equine Sci, 32(3), 91-98.
https://doi.org/10.1294/jes.32.91 Publication
Researcher Affiliations
- School of Veterinary Medicine, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia.
- School of Veterinary Medicine, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia.
- School of Veterinary Medicine, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia.
- School of Veterinary Medicine, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia.
- School of Veterinary Medicine, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia.
- School of Animal Science, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia.
- School of Veterinary Medicine, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia.
- School of Veterinary Medicine, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia.
- Institute of Technology, Khan-Uul, Ulaanbaatar 17060, Mongolia.
- School of Veterinary Medicine, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia.
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