Predicting fat deposition in growing Boer goat castrates and does using ultrasonography

IF 1.6 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE Small Ruminant Research Pub Date : 2024-04-15 DOI:10.1016/j.smallrumres.2024.107270
T.S. Brand , J.P. van der Westhuyzen , P.G. Theron , J.H.C. van Zyl
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Abstract

Ultrasonography was used to determine the subcutaneous backfat deposition of Boer goat castrates and does from weaning until one year of age. Logarithmic regressions of subcutaneous backfat measurements were constructed using body weight and age as inputs. The logarithmic regression of subcutaneous backfat deposition with bodyweight had a moderate to good fit, with Boer goat does displaying a better fit (R2=0.70) than castrates (R2=0.65). The logarithmic regression of subcutaneous backfat with age indicated a good fit for both sexes (R2=0.85). Castrates and does displayed similar rates of subcutaneous backfat deposition. The models proposed here will enable producers to estimate the subcutaneous backfat depth of Boer goat castrates and does with reasonable accuracy and can be utilized as benchmarks in precision Boer goat rearing applications, such as predicting an appropriate slaughter weight.

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利用超声波成像技术预测生长期波尔山羊阉羊和母羊的脂肪沉积情况
采用超声波成像技术测定波尔山羊阉羊和母羊从断奶到一岁期间的皮下背膘沉积情况。以体重和年龄为输入值,对皮下背膘测量值进行对数回归。皮下背膘沉积与体重的对数回归具有中等到良好的拟合度,其中波尔山羊母羊的拟合度(R2=0.70)优于阉羊(R2=0.65)。皮下背膘与年龄的对数回归结果表明,雌雄山羊的拟合度都很好(R2=0.85)。阉牛和母牛的皮下背膘沉积率相似。这里提出的模型将使生产者能够合理准确地估计波尔山羊阉羊和母羊的皮下背膘深度,并可用作精确饲养波尔山羊的基准,如预测适当的屠宰体重。
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来源期刊
Small Ruminant Research
Small Ruminant Research 农林科学-奶制品与动物科学
CiteScore
3.10
自引率
11.10%
发文量
210
审稿时长
12.5 weeks
期刊介绍: Small Ruminant Research publishes original, basic and applied research articles, technical notes, and review articles on research relating to goats, sheep, deer, the New World camelids llama, alpaca, vicuna and guanaco, and the Old World camels. Topics covered include nutrition, physiology, anatomy, genetics, microbiology, ethology, product technology, socio-economics, management, sustainability and environment, veterinary medicine and husbandry engineering.
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