The sweat fatty acid content of Holstein and Jersey cows in Summer

IF 0.7 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pakistan Journal of Agricultural Sciences Pub Date : 2022-11-01 DOI:10.21162/pakjas/22.1534
Özgül Anitaş
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Abstract

Sweat is important in thermoregulation, helping to dissipate heat in the body by evaporation in hot conditions in dairy cows. The purpose of this study was to evaluate the variation of sweat fatty acid compositions in summer conditions in Jersey and Holstein dairy cattle for their potential thermoregulatory roles in animal health protection. Temperature, relative humidity and Temperature-Humidity Index (THI) values were calculated for the intensity of stress in the indoor environment. The chemical compounds of sweat were determined by gas chromatography device and inter-breeds differences were revealed. As a result of analyzes, a total of 23 fatty acids were detected in both breeds. It was understood that there were 15 fatty acids in the Jersey breed. Palmitic acid was detected at a rate of 27.72 % in Holstein cows and 25.16 % in jersey cows that may be due to a higher rate of fatty acid release from muscle tissue, so that it may be less resistant than the jersey breed in heat stress conditions. It can be said that palmitic acid can be an indicator for heat stress conditions. ∑SFA and ∑PUFA contents of the sweat of Holstein cows were lower than those of Jersey breeds while ∑MUFA content was higher than those of Jersey breeds. The high expulsion of ∑SFA and ∑PUFA in the sweat of the Jersey cows can provide the function of delaying the body's dehydration by forming a hydrolipid film on the skin surface in hot conditions
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荷斯坦奶牛和泽西奶牛夏季汗液脂肪酸含量
汗水在体温调节中很重要,有助于奶牛在炎热的条件下通过蒸发来散发体内的热量。本研究的目的是评估泽西和荷斯坦奶牛夏季汗液脂肪酸组成的变化,以了解其在动物健康保护中的潜在体温调节作用。计算了室内环境应力强度的温度、相对湿度和温湿度指数(THI)值。采用气相色谱法测定汗液的化学成分,揭示了品种间的差异。分析结果表明,在这两个品种中共检测到23种脂肪酸。据了解,泽西品种有15种脂肪酸。在荷斯坦奶牛和泽西奶牛中,棕榈酸的检测率分别为27.72%和25.16%,这可能是由于肌肉组织中脂肪酸释放率较高,因此在热应激条件下,它的抵抗力可能不如泽西奶牛。可以说,棕榈酸可以作为热应激条件的指示物。荷斯坦奶牛汗液中∑SFA和∑PUFA含量低于泽西品种,∑MUFA含量高于泽西品种。在高温条件下,泽西奶牛汗液中大量排出的∑SFA和∑PUFA可在皮肤表面形成一层水脂膜,起到延缓机体脱水的作用
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来源期刊
Pakistan Journal of Agricultural Sciences
Pakistan Journal of Agricultural Sciences AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
1.80
自引率
25.00%
发文量
18
审稿时长
6-12 weeks
期刊介绍: Pakistan Journal of Agricultural Sciences is published in English four times a year. The journal publishes original articles on all aspects of agriculture and allied fields.
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