Effect of floor cooling on late lactation sows under acute heat stress

Cabezón, F. A.; Schinckel, A. P.; Marchant‐Forde, Jeremy N.; Johnson, Jay S; Stwalley, Robert M.

doi:10.1016/j.livsci.2017.10.017

Cited by 26 publications

(15 citation statements)

References 20 publications

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“…The present study examined the effects of different cooling water flow rates through a cooling pad on lactating sows' behavioral and heart rate responses to acute heat stress. The effects on these sows' respiration rates, vaginal, skin, and rectal temperatures have been previously reported ( 32 ). These authors found beneficial effects of the cooling pad with a “dose-dependent” decrease in respiration rates and temperatures with increasing water flow rates from LOW to HIGH (from 0.25 to 0.85 L/min for 100 min) in comparison to a CONTROL flow rate (0.00 L/min).…”

Section: Discussionmentioning

confidence: 79%

“…Recently, a cooling pad has been designed to increase the potential removal of excess heat of modern lactating sows in high environmental temperatures ( 31 ). It showed beneficial effects on the sows' respiration rates, and vaginal, skin, and rectal temperatures ( 32 ), with a “dose-dependent” decrease for all traits with increasing water flow rates from LOW to HIGH (from 0.25 to 0.85 L/min for 100 min) in comparison to a CONTROL flow rate (0.00 L/min). The ultimate goal is that the system will be controllable at the individual sow level, potentially sampling welfare parameters from the sow in real time and using that information to adjust the cooling efficiency of the system.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Floor Cooling on Behavior and Heart Rate of Late Lactation Sows Under Acute Heat Stress

et al. 2018

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Much U.S. swine production is in Köppen climate types classified as “hot-summer humid continental” and “humid subtropical.” As a result, farrowing sows are often exposed to temperatures above their upper critical temperature. This heat stress (HS) can affect sow welfare and productivity and have a negative economic impact. The study objective was to evaluate the impact of a cooling pad on sows' behavioral and heart rate responses to acute HS. Treatments were randomly allotted to ten multiparous sows to receive a constant cool water flow of 0.00 (CONTROL, n = 4), 0.25 (LOW, n = 2), 0.55 (MEDIUM, n = 2), or 0.85 (HIGH, n = 2) L/min for 100 min and replicated eight times, switching treatments so that each sow was exposed to each treatment. The cooling was initiated 1 h after the room reached 35°C for 100 min. Eating, drinking and nursing behaviors, postures, and heart rate were recorded before heating (Period 1), prior to cooling (Period 2), and during cooling (Period 3). There were no differences between LOW, MEDIUM, and HIGH flow rates for any periods on all behavioral and heart rate traits, so data were pooled (COOLED). There were no differences in any of the measures during Periods 1 and 2, except for the ratio of short term to long term heart rate variability (SD1:SD2) with higher values for CONTROL than COOLED sows in Period 2. During Period 3, CONTROL sows changed postures more frequently (11.5 ±1.6 vs. 5.1 ±1.6 changes per hour), spent more time drinker-pressing/drinking (4.4 ± 0.5 vs. 1.4 ± 0.4% of time), standing (6.6 ± 1.7 vs. 3.8 ± 1.6% of time), sitting (10.0 ± 1.2 vs. 4.0 ± 1.1), less time lying (83.0 ±1.8 vs. 92.0 ±1.7% of time), especially lying laterally (62.0 ± 5.6 vs. 75.0 ± 5.3% of time), than sows in all three cooling treatments (all P < 0.001). Heart rate during Period 3 was lower for COOLED sows compared to the CONTROL sows (100.2 ± 3.4 vs. 119.0 ± 4.0 beat per min, P < 0.001). Sows response to increased thermal load can be effectively reduced using water-cooled cooling pads, thereby improving sow comfort and welfare. The beneficial effects on behavior are noticeable from the lowest flow rate.

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Section: Discussionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Effect of Floor Cooling on Behavior and Heart Rate of Late Lactation Sows Under Acute Heat Stress

et al. 2018

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“…However, papers not related to the keywords used or that did not fit the established criteria were disregarded as recommended in the literature (SILVA et al, 2014). The papers selected to compose the systematic review were concentrated between the years 2008 and 2018 probably due to changes in related to the yield of modern sows, which became more sensitive to high temperatures (CABEZÓN et al, 2017). This justifies the need for studies about adaptations in relation to the thermal environment of the barns, among them the evaporative cooling system is shown as an alternative.…”

Section: Discussionmentioning

confidence: 99%

“…The genetic improvement of the commercial strains, especially of the strains of sows, allowed the increase of production and the sows became more demanding metabolically, mainly when gestating or lactating. Higher yield implies high thermogenesis as compared to sows from more ancient strains, which resulted in higher environmental requirements with reduction of the upper critical temperature (BROWN-BRANDL et al, 2014;STINN & XIN, 2014;CABEZÓN et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

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Evaporative cooling system for gestating and lactating sows: a systematic review

et al. 2020

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Climatic characteristics of the production sites of pigs influence the yield of the system, with breeding sows being a category extremely sensitive to high temperatures, especially when their upper critical temperature is reached. This review evaluated the effects of the evaporative cooling system on environmental, physiological and performance parameters in breeding sows. By means of this review, a bibliographic search was performed using the following keywords: sow; swine; gilt and pig combined individually with the expression ‘evaporative cooling’. A total of 11 papers met the prerequisites determined to compose the systematic review and the studies involved gestating and lactating sows maintained in environments that presented ambient temperatures between 21.5 and 34.8 °C and relative humidity between 32.2 and 84.2%. The evaporative cooling system was used in order to cool the macro or micro environment. It can be concluded that the use of evaporative cooling system promotes increase in feed intake per lactating sow, decrease in weight loss in lactation, increase of weight of piglets at weaning, temperature reduction of the barns and decrease of the respiratory rate of the sows. For gestating sows, no changes in reproductive performance were reported.

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Performance and economic comparison of three annual air-conditioning systems in sow houses

Xie,

Min,

et al. 2024

Applied Thermal Engineering

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Effect of floor cooling on late lactation sows under acute heat stress

Cited by 26 publications

References 20 publications

Effect of Floor Cooling on Behavior and Heart Rate of Late Lactation Sows Under Acute Heat Stress

Effect of Floor Cooling on Behavior and Heart Rate of Late Lactation Sows Under Acute Heat Stress

Evaporative cooling system for gestating and lactating sows: a systematic review

Performance and economic comparison of three annual air-conditioning systems in sow houses

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