An effective temperature derived from a mechanistic thermophysiological model for sows reared in hot climates

Huang, Tao; Zhang, Guoqiang; Brandt, Pia; Bjerg, Bjarne; Pedersen, Poul; Rong, Li

doi:10.1016/j.biosystemseng.2022.05.015

Cited by 5 publications

(4 citation statements)

References 33 publications

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“…As a result, alternative cooling methods have been explored to mitigate heat stress. These methods include intermittent partial surface sprinkling, misting, fogging, and alternative ventilation systems [35,[40][41][42][43][44][45].…”

Section: Improving Animal Environment and Management Practicesmentioning

confidence: 99%

Research progress on animal environment and welfare

Li,

Wang,

Rong

et al. 2023

Animal Research and One Health

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Animal welfare closely depends on its ability to adapt and thrive in a harmonious relationship with its environment, ensuring both physical and psychological well‐being. Over the years, the welfare of farm animals has gathered global attention and has become increasingly important to the general public and scientific communities. The connection between the environment and animal welfare is primarily established through the provision of suitable and controllable environment for animals. However, it is essential to recognize that the impact of environment extends beyond merely ensuring freedom from discomfort. The environment plays a crucial role in shaping an animal's response to challenges such as disease, stress, and pathogen. While animals may be housed in controlled environments that provide optimal conditions for health, production, and welfare, it is important to acknowledge that specific scenarios can significantly affect and alter the environmental requirements. Even with access to fresh air, certain factors can have a substantial impact on the well‐being of animals. Furthermore, providing appropriate environmental conditions goes beyond meeting basic needs and can greatly contribute to allowing animals to engage in their natural behaviors. It serves as a relevant tool for ensuring and maintaining adequate welfare standards. This review takes a comprehensive approach to environmental welfare by considering the welfare of animals managed in different stocking systems, considering environmental stress, stocking systems, and the provision of environmental enrichment items. By examining these factors, a broader understanding of the relationship between environment and welfare is achieved and recommendations for future research are outlined.

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Section: Improving Animal Environment and Management Practicesmentioning

confidence: 99%

Research progress on animal environment and welfare

Li,

Wang,

Rong

et al. 2023

Animal Research and One Health

Self Cite

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“…In their study, based on the establishment of a mechanistic thermophysiological model for sows (Huang et al., 2021a,b), Huang et al. (2022) concluded that when RH > 60%, the effect of a 10% increase in RH on the thermophysiological responses of gestating sows is equivalent to the effects of 1°C increase in ambient air temperature.…”

Section: Assessmentmentioning

confidence: 99%

“…For each of the references, the reported dry temperature is listed, as well as the primary ABM used in the studies The thresholds suggested by Bjerg et al (2020) are overlapping with findings from other studies. In their study, based on the establishment of a mechanistic thermophysiological model for sows (Huang et al, 2021a,b), Huang et al (2022) concluded that when RH > 60%, the effect of a 10% increase in RH on the thermophysiological responses of gestating sows is equivalent to the effects of 1°C increase in ambient air temperature.…”

Section: E) Identification Of Microclimatic Conditions To Protect Pig...mentioning

confidence: 99%

Welfare of pigs during transport

Nielsen¹,

Álvarez²,

Bicout³

et al. 2022

EFS2

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In the framework of its Farm to Fork Strategy, the Commission is undertaking a comprehensive evaluation of the animal welfare legislation. The present Opinion deals with protection of pigs during transport. The welfare of pigs during transport by road is the main focus, but other means of transport are also covered. Current practices related to transport of pigs during the different stages (preparation, loading/unloading, transit and journey breaks) are described. Overall, 10 welfare consequences were identified as highly relevant for the welfare of pigs during transport based on the severity, duration and frequency of occurrence: group stress, handling stress, heat stress, injuries, motion stress, prolonged hunger, prolonged thirst, restriction of movement, resting problems and sensory overstimulation. These welfare consequences and their animal-based measures are described. A variety of hazards were identified, mainly relating to factors such as mixing of unfamiliar pigs, inappropriate handling methods and devices, the use of pick-up pens, inexperienced/untrained handlers, structural deficiencies of vehicles and facilities, poor driving conditions, unfavourable microclimatic and environmental conditions and poor husbandry practices leading to these welfare consequences. The Opinion contains general and specific conclusions relating to the different stages of transport of pigs. Recommendations to prevent hazards and to correct or mitigate welfare consequences are made. Recommendations were also developed to define quantitative thresholds for microclimatic conditions and minimum space allowance within means of transport. The development of the welfare consequences over time was assessed in relation to maximum journey duration. The Opinion covers specific animal transport scenarios identified by the European Commission relating to transport of cull sows and 'special health status animals', and lists welfare concerns associated with these.

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“…Environmental temperature and air humidity rank as the most influential climatic factors affecting pig production, with temperature fluctuations exerting a substantial influence on pigs' well-being. Excessive heat can induce heat stress, which disrupts feed intake, digestion, and nutrient absorption, ultimately resulting in decreased productivity [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Smart Temperature and Humidity Control in Pig House by Improved Three-Way K-Means

Li,

et al. 2023

Agriculture

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Efficiently managing temperature and humidity in a pig house is crucial for enhancing animal welfare. This research endeavors to develop an intelligent temperature and humidity control system grounded in a three-way decision and clustering algorithm. To establish and validate the effectiveness of this intelligent system, experiments were conducted to compare its performance against a naturally ventilated pig house without any control system. Additionally, comparisons were made with a threshold-based control system to evaluate the duration of temperature anomalies. The experimental findings demonstrate a substantial improvement in temperature regulation within the experimental pig house. Over a 24 h period, the minimum temperature increased by 4 °C, while the maximum temperature decreased by 8 °C, approaching the desired range. Moreover, the average air humidity decreased from 73.4% to 68.2%. In summary, this study presents a precision-driven intelligent control strategy for optimizing temperature and humidity management in pig housing facilities.

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An effective temperature derived from a mechanistic thermophysiological model for sows reared in hot climates

Cited by 5 publications

References 33 publications

Research progress on animal environment and welfare

Research progress on animal environment and welfare

Welfare of pigs during transport

Smart Temperature and Humidity Control in Pig House by Improved Three-Way K-Means

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