From Heat Tolerance to Heat Stress Relief: An Evolution of Notions in Animal Farming

Berman, A.

doi:10.1002/9781119949091.ch1

Cited by 7 publications

(5 citation statements)

References 59 publications

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“…In Israel, cows are housed in a large shaded area (16–22 m 2 per cow) under a high roof shelter (Figure 1a). The high natural air velocity to which the roof is exposed reduces its temperature thereby radiation to the animals (Berman, 2012).…”

Section: Direct Cooling and Indirect Coolingmentioning

confidence: 99%

Cooling is the predominant strategy to alleviate the effects of heat stress on dairy cows

Roth

2020

Reprod Domestic Animals

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Reduced reproductive performance of lactating cows during the summer is associated mainly with intensive genetic selection for high milk production, which places a great load on the thermoregulatory mechanism. In the last decades, a big effort has been made to explore the mechanism by which heat stress compromises fertility. The data gained so far revealed that the effect of thermal stress on the female reproductive tract is multifactorial in nature. Based on this understanding, new strategies to mitigate the effect of heat stress have been developed. The review summarizes some of the physiological responses of the cow to elevated temperature and discusses its limitations to maintain normothermia. The review emphasizes that cooling is the predominant strategy used today to alleviate the effects of heat stress. Findings from the Israel dairy herd indicate that efficient cooling management can improve milk production during the summer to a similar level of the winter, expressed by summer to winter ratio of 0.98. However, cooling as a singular approach cannot eliminate the decline in reproduction. Nonetheless, an efficient cooling system is a prerequisite for any other strategy. The review suggests additional hormonal treatments to improve reproductive performance during the summer. Given the complexity of heat stress effects on reproduction, comprehensive reproductive management during the summer is suggested, that is combining two or more strategies in a programme, might be more beneficial.

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Section: Direct Cooling and Indirect Coolingmentioning

confidence: 99%

Cooling is the predominant strategy to alleviate the effects of heat stress on dairy cows

Roth

2020

Reprod Domestic Animals

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“…Heat tolerance is the ability of livestock to maintain core body temperature when subjected to hot condition. The quantity of metabolic heat production and heat dissipation by animals determine the extent of heat stress they are subjected to (Berman, 2012). The productivity and welfare of animals are influenced by the heat from their immediate environment.…”

Section: Heat Tolerance Of Broilersmentioning

confidence: 99%

State-of-the-Art Technologies for Assessing Thermal Comfort of Broiler Chickens

Jongbo¹,

Atta²

2019

IJEAST

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The thermal assessment of the environment where poultry birds are raised is very important to prevent them from poor welfare, poor health and poor performance. Contain evaluation of poultry environment would enable the poultry growers to understand the conditions of their flocks and also to know when there is a change in the behaviours of the birds. In order to assess the thermal comfort of broiler chickens without disturbing them, there is a need for the state-of-the-art technologies. There are different technologies adopted by various researchers to evaluate the thermal comfort of broiler chicken subjected to different environmental conditions. However, there is no comprehensive report on the techniques for assessing the thermal comfort of broiler chicken. Therefore, this study intended to comprehensively compile all the available technologies which have been used by the researchers to evaluate the thermal comfort of broiler chickens. This study has found out that, apart from thermal indices, precision livestock farming (PLF) equipment are very important tools which could be adopted by all broiler chicken growers to assess the thermal comfort of broiler chickens during hot conditions in order to prevent them from heat stress. Furthermore, it has also been reported that most farmers may not be able to afford the tools due to their high initial investment, unavailability of technical-know-how and high maintenance cost most especially in the developing countries.

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“…The deleterious effect of warm climates on overall animal performance became more important due to the introduction of temperate climate breeds in tropical environments during the 1920s and 1930s (Berman 2012). Cattle subspecies such as Bos taurus taurus (B. taurus) and Bos taurus indicus (B. indicus) present differences in their ability to cope with elevated temperatures and maintain their thermal stability, a characteristic defined as heat tolerance (McManus et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The former subspecies has its origin in Europe, while the latter derived from subspecies that evolved in warm zones of Asia. This distinction in breed evolution is responsible for the better adaptation of B. indicus to heat (Berman 2012). According to Hansen (2004), B. indicus cattle produce less heat, reduce cell damage when exposed to increased temperatures (compared to B. taurus), and increase dissipating heat to the environment.…”

Section: Introductionmentioning

confidence: 99%

Elevated temperature-humidity index induces physiological, blood and milk alterations in Holstein cows in a more pronounced manner than in 1/2 and 3/4 Holstein × Gir

Stumpf

Kolling

Fischer

et al. 2021

JABB

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From Heat Tolerance to Heat Stress Relief: An Evolution of Notions in Animal Farming

Cited by 7 publications

References 59 publications

Cooling is the predominant strategy to alleviate the effects of heat stress on dairy cows

Cooling is the predominant strategy to alleviate the effects of heat stress on dairy cows

State-of-the-Art Technologies for Assessing Thermal Comfort of Broiler Chickens

Elevated temperature-humidity index induces physiological, blood and milk alterations in Holstein cows in a more pronounced manner than in 1/2 and 3/4 Holstein × Gir

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