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Stress indicators, carcass characteristics and meat quality of Xhosa goats subjected to different watering regimen and vitamin C supplementation
Livestock Science ( IF 1.8 ) Pub Date : 2020-05-03 , DOI: 10.1016/j.livsci.2020.104083
O.F. Akinmoladun , F.N. Fon , C.T. Mpendulo

Limited water intake in small ruminants induced by water scarcity may result in pre-slaughter stress. A possible management practice could be the supplementation of exogenous antioxidant during the period of water stress. The effect of water restriction (W) levels with or without single and/or multiple vitamin C (VC) supplementations were evaluated on plasma hormones (cortisol, β-estradiol, thyroxine (T4), tri-iodothyronine (T3), prolactin, FSH, LH, insulin) carcass and non-carcass components and physicochemical characteristics of the longissimus thoracis et lumborum (LTL) muscle of Xhosa ear lobe goats. Forty-two goats were divided equally and randomly assigned into seven treatments; without water restriction (W0, control); water restriction of 70% of ad libitum water intake (W70); water restriction of 50% ad libitum water intake (W50); water restriction of 70% of ad libitum water intake plus 3g VC daily (W70+); water restriction 50% of ad libitum water intake plus 3g VC daily (W50+); water restriction of 70% of ad libitum water intake plus 3g VC and extra 5gVC given every eight-day (70++); water restriction of 50% of ad libitum water intake plus 3g VC and extra 5gVC given every eight-day (W50++). At the end of the 75-day experimental trial, the goats were humanely slaughtered and dressed. Increased plasma cortisol concentration due to water stress was lessened (P < 0.05) by VC. FSH, LH and insulin were not affected (P > 0.05) by levels of water restriction. The decreased (P < 0.05) hot and cold carcass weights in W70 and W50 were reduced in W70+ and W50+ respectively. The weights of the head and spleen were not affected by water restriction levels while that of the liver, skin and kidney decreased significantly (P < 0.05) with increased water restriction levels. VC treated goats had much-improved redness (a*) than the untreated (W70 and W50) and control groups (W0). The shear force and cooking loss increased with levels of water restriction while thaw loss, pH45min and pH24h were not affected by water restriction levels. VC may be used to minimize body weight loss, carcass traits and other stressors induced in animals during the period of water scarcity.



中文翻译:

不同浇水方式和补充维生素C对科萨山羊的压力指标,car体特征和肉质的影响

缺水引起的小型反刍动物取水量有限可能会导致屠宰前压力。可能的管理实践可能是在缺水时期补充外源抗氧化剂。在血浆激素(皮质醇,β-雌二醇,甲状腺素(T 4),三碘甲状腺素(T 3),催乳素)上评估了添加或不添加单一和/或多种维生素C(VC)的水分限制(W)水平的影响,FSH,LH,胰岛素)尸体和非尸体成分以及科萨人耳垂山羊的胸大肌和腰腰肌(LTL)的理化特性。将42只山羊平均分为随机分为7种处理。无水限制(W0,控制);水分限制的70%随意摄入水(W70);取水量限制为任意采水量的50%(W50);水分限制为随意摄入水的70%,每天加3g VC(W70 +);水分限制,随意摄入水的50%,每天加3g VC(W50 +);每八天(70 ++)给水量限制为随意摄入水量的70%加上3g VC和额外的5gVC ;的50%限水随意给予每八天(W50取水口加3克VC和额外5gVC ++)。在为期75天的试验结束时,对山羊进行了人道的屠宰和穿衣。VC降低了由于水分胁迫引起的血浆皮质醇浓度升高(P <0.05)。FSH,LH和胰岛素不受水分限制水平的影响(P> 0.05)。W70 +和W50 +中W70和W50降低的(P <0.05)hot体重量分别降低。头和脾的重量不受水分限制水平的影响,而肝脏,皮肤和肾脏的重量随着水分限制水平的增加而显着降低(P <0.05)。VC处理的山羊比未处理的山羊(W70和W50)和对照组(W0)的血红度(a *)大大提高。剪切力和蒸煮损失随水分限制水平而增加,而融化损失,pH45min和pH 24h不受水分限制水平的影响。VC可用于最大程度地减少缺水期间动物引起的体重减轻,car体性状和其他应激源。

更新日期:2020-05-03
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