The aim of this study was to gain insights in respect to how locally adapted goats exhibit dynamic body heat in an equatorial semi-arid environment. Ten Canindé goats were used in the study (22.90 ± 2.70 kg). Respiratory rate ( R R ; min breaths −1 ), rectal temperature ( R T ; °C) and sweating rate ( S R ; g m −2 h −1 ) were measured for 8 days, once a week, for 8 consecutive weeks in each animal, with collection intervals of 1 h throughout the day (24 h), together with the meteorological variables. Air temperature ( A T , °C) and relative humidity ( R H , %) were measured, and then, the temperature humidity index ( T HI ) was calculated. First, we determined 2 days with stressful climatic conditions and similar environmental characteristics (day 1 and 2) among the 8 experimental days. The R T was evaluated on these 2 days using the means of each hour as the cut-off point, and determining whether the animals are efficient (EF) or inefficient (INEF) in heat loss (β 1 ) and gain (β 2 ). The R T was separated in β 1 and β 2 for 24 h, setting times to obtain the angular coefficients (β) for both. The days with stressful climatic conditions and similar environmental characteristics were day 1 and 2. The hours in which the Canindé goats gained and lost heat were respectively 11 a.m. to 3 p.m. and from 4 p.m. to 10 a.m. The animals classified as EF lost more or equal the amount of heat represented for R T . When the mean of all animals was evaluated for efficiency in heat control, the flock was classified as EF. Differences ( P < 0.05) were observed for R R and S R between periods. The efficiency in dynamic body heat of the locally adapted goats in this study was determined and showed that the flock as a whole possesses an excellent heat dynamic in an equatorial semi-arid environment.

中文翻译：

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当地适应的山羊在赤道半干旱环境中有效地获得和失去热量

本研究的目的是深入了解当地适应的山羊如何在赤道半干旱环境中表现出动态体温。研究中使用了 10 只 Canindé 山羊 (22.90 ± 2.70 kg)。对每只动物连续 8 周、每周一次、连续 8 周测量呼吸率（RR；分钟呼吸 -1）、直肠温度（RT；°C）和出汗率（SR；gm -2 h -1），全天（24 小时）的收集间隔为 1 小时，以及气象变量。测量空气温度（AT，℃）和相对湿度（RH，%），然后计算温度湿度指数（THI）。首先，我们在 8 个实验日中确定了 2 天具有压力气候条件和类似的环境特征（第 1 天和第 2 天）。使用每小时的平均值作为截止点，并确定动物在热损失 (β 1 ) 和增益 (β 2 ) 方面是高效 (EF) 还是低效 (INEF)，在这 2 天内评估了 RT。RT 在 β 1 和 β 2 中分离 24 小时，设定时间以获得两者的角系数 (β)。具有压力气候条件和相似环境特征的天数为第 1 天和第 2 天。 Canindé 山羊获得和失去热量的时间分别为上午 11 点至下午 3 点和下午 4 点至上午 10 点。 RT 表示的热量。当评估所有动物的平均热量控制效率时，该群被归类为 EF。在不同时期之间观察到 RR 和 SR 的差异（ P < 0.05）。