在潮湿的热带环境下,热应激山羊的生理变化和行为反应
Asep I M Ali1, Sofia Sandi2, Armina Fariani2
1Faculty of Agriculture, Universitas Sriwijaya, South Sumatra, 30662, Indonesia. asep_ali@fp.unsri.ac.id.
International journal of biometeorology
|August 14, 2023
概括
由于全球变暖而导致的最高气温上升会对山羊生产产生负面影响. 这项研究评估了Kcang (K) 和Kcang Etawah (KE) 交叉山羊在热应激下的生理和行为变化,发现了品种特异性的耐热差异.
科学领域:
- 动物科学动物科学
- 环境生理学环境生理学
- 适应气候变化 适应气候变化
背景情况:
- 卡 (K) 和卡埃塔瓦 (KE) 交叉山羊对热带农业至关重要,但由于全球气温上升而面临生产挑战.
- 气候变化和最高气温 (Tmax) 的上升对山羊养殖的可持续性和收入构成重大威胁.
研究的目的:
- 评估K和KE交叉山羊暴露在高最高温度 (Tmax) 的生理和行为适应.
- 了解热应激对山羊生产力的影响,并确定性方面的潜在品种差异.
主要方法:
- 六只K和六只KE雌性山羊被安置在受控环境中,模拟正常 (33°C Tmax) 和热 (38°C Tmax) 条件,分别为6周和7周.
- 监测生理参数 (体温,呼吸率,血液代谢物) 和行为模式 (躺时间,反).
- 量化了干物质 (DM) 摄入量,DM消化能力和水平衡.
主要成果:
- 在炎热的条件下,山羊表现出直肠,皮肤温度,呼吸率,血红蛋白和胆固醇的增加,血糖降低.
- 干物质 (DM) 的摄入量减少,而DM的消化能力增加. 水的摄入和保留减少了.
- 两种品种的躺时间都增加了;KE山羊的躺和反时间更长,与更高的DM消化率相关.
结论:
- 较高的最高温度显著影响山羊的生理和行为,KE山羊表现出潜在的更高的耐热性.
- 品种特定的反应和环境因素,如热量持续时间和温度湿度指数 (THI) 变化,影响热应激影响的严重程度.
- 调查结果为在气候变暖的情况下管理山羊生产提供了洞察力.
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