Physiological changes and behavioral responses in heat-stressed goats under humid tropical environment

IF 3 3区地球科学 Q2 BIOPHYSICS International Journal of Biometeorology Pub Date : 2023-08-14 DOI:10.1007/s00484-023-02536-x

Asep I. M. Ali, Sofia Sandi, Armina Fariani, Abdullah Darussalam

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Abstract

Kacang (K) and Kacang Etawah (KE) cross goats are the major goat breeds that are important for farming livelihood and income and recognized for their tolerance to hot and humid tropical climates. As global warming progresses, the daily maximum temperature (T_max) is predicted to be continuously increased, which will challenge goat production in the future. The objective of this study was to evaluate the physiological and behavioral responses of the goats to the elevated T_max. Six K and six KE female goats were housed in a normal environment (average T_max: 33°C; temperature humidity index (THI): 76 to 86) for 6 weeks and then in a hot environment (average T_max: 38°C; THI: 76 to 92) for 7 weeks. During hot conditions, rectal, rectal surface, and skin temperature, respiration rate, hemoglobin, and cholesterol increased (p < 0.05), whereas glucose blood levels decreased (p < 0.01). Dry matter (DM) intake was lowered (p < 0.01), and DM digestibility was elevated (p < 0.01), whereas drinking water and body water retention were lowered but varied (p < 0.05) during hot weeks. Lying time increased during the hot weeks in both breeds (p < 0.01), whereas lying and ruminating as well as total ruminating time was longer (p < 0.05) in KE goats compared to K goats, which explain the greater (p < 0.05) DM digestibility in KE goats. The effect of the elevated T_max might be less severe since it also depends on the duration of the T_max and the variation of daily THI.

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热带潮湿环境下热应激山羊的生理变化和行为反应。

Kacang（K）和Kacang Etawah（KE）杂交山羊是主要的山羊品种，对农业生计和收入很重要，并因其对湿热热带气候的耐受性而得到认可。随着全球变暖的进展，预计日最高气温（Tmax）将持续升高，这将对未来的山羊生产构成挑战。本研究的目的是评估山羊对Tmax升高的生理和行为反应。将6只K和6只KE母山羊在正常环境（平均Tmax:33°C；温湿度指数（THI）:76-86）中饲养6周，然后在高温环境（平均T max:38°C；THI:76~92）中饲养7周。在炎热的天气条件下，直肠、直肠表面和皮肤温度、呼吸频率、血红蛋白和胆固醇增加（p<0.05），而葡萄糖血液水平下降（p<0.01）。干物质（DM）摄入量降低（p<0.01），DM消化率提高（p<0.01）；而饮用水和体水保持率降低，但在炎热的几周内有所不同（p<0.05）。在两个品种的热周期间，躺着的时间都增加了（p<0.01），而与K山羊相比，KE山羊的躺着和反刍以及总反刍时间更长（p<0.05），这解释了KE山羊的DM消化率更高（p<0.05）。Tmax升高的影响可能不那么严重，因为它还取决于Tmax的持续时间和每日THI的变化。

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来源期刊

International Journal of Biometeorology 地学-环境科学

CiteScore

6.40

自引率

9.40%

发文量

183

审稿时长

1 months

期刊介绍： The Journal publishes original research papers, review articles and short communications on studies examining the interactions between living organisms and factors of the natural and artificial atmospheric environment. Living organisms extend from single cell organisms, to plants and animals, including humans. The atmospheric environment includes climate and weather, electromagnetic radiation, and chemical and biological pollutants. The journal embraces basic and applied research and practical aspects such as living conditions, agriculture, forestry, and health. The journal is published for the International Society of Biometeorology, and most membership categories include a subscription to the Journal.