Effect of feed intake level on the body temperature of pigs exposed to heat stress conditions.
Abstract
Feed intake (FI) level affects body heat production in thermo-neutral pigs; exposure of pigs to heat stress (HS) also increases body temperature (BT). However remains unclear whether the FI level affects the heat production of HS pigs. This study analyzed the effect of FI level on BT of 9 HS pigs (46.3 ± 2.6 kg body weight) implanted with a thermometer set to register the BT at 5-min intervals into the ileum. Pigs were divided in two groups randomly allotted to two FI treatments: high FI (HFI, 1.20 kg/d), and low FI (LFI, 0.96 kg/d), according to a two-period crossover experimental design. Pigs were fed 3-times a day (0600, 1200, and 2200 h), same amount each time (400 g or 320 g). Ambient temperature (AT) ranged from 29.0 to 35.4 °C. The BT of both HFI and LFI pigs followed a similar pattern along a 24-h period, but the BT of HFI pigs was higher than that of LFI pigs (P < 0.05). Postprandial afternoon and evening BT was higher than that after the morning meal (P < 0.05). The postprandial BT increment differed between meal times and AT, but not between FI levels. The BT of HFI and LFI pigs increased up to 0.18 and 0.22 °C, 0.60 and 0.61 °C, and 0.24 and 0.35 °C after the morning, afternoon, and evening meal, respectively, compared with the preprandial BT (P < 0.05). Hence, the dissipation capacity of feeding-related body heat appears to depend on the thermal load of HS pigs before consuming their meals; presumably, the thermal load during 6-h before the morning meal (AT below…
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The effectiveness of thermoregulation depends to a large extent on body temperature along with ambient environmental conditions inside livestock buildings.
“The effectiveness of thermoregulation depends, to a large extent, on body temperature (Albright, 1993) along with ambient environmental conditions inside livestock building (Cervantes et al., 2018; Ramesh and Saseendran, 2002).”
From Modeling of Ambient Environment and Thermal Status Relationship of Pig’s Body in a Pig Barn (2020) · cites this paper as Cervantes et al., 2018
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“This response is probably aimed at reducing the heat production derived from the feeding and digestion processes (Cervantes et al. 2018), despite an increased expression of gonadotropin-inhibitory hormone, an orexigenic agent (Chowdhury et al. 2012) and other appe-tite-stimulating hormones such as…”
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“However, feed intake increases immediately after the heat load is removed [9], and this has the potential to add heat to the body and delay the return to euthermia due to the heat from nutrient processing [10].”
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“The exposure of pigs to high AT increases their BT (Renaudeau et al., 2010; Pearce et al., 2013; Cervantes et al., 2018).”
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“…the barn rise beyond the pigs’ optimal thermal zone, they experience heat stress, which can lead to reductions in feed intake, milk production (Cervantes et al., 2018; Servi-ento et al., 2020), animal welfare (Johnson et al., 2019), and reproductive performance, such as increasing the…”
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“The lack of effects on FI and WG between treatments and the better FG obtained for the T21 group were not expected, because when pigs are subjected to heat stress, there is a reduction in voluntary FI in order to reduce the heat increment (HI) of feeding (Cervantes et al., 2018).”
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“The capacity of animals is low to diminish body heat during high AT (Pearce et al., 2015; Cervantes et al., 2018).”
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Influential
- Authors
- Cervantes, M., Antoine, D., Valle, J. A., Vásquez, N., Camacho, R. L., Bernal, H., & Morales, A.
- Affiliations
- Universidad Autónoma de Baja California (MX)
- Universidad Autónoma de Nuevo León (MX)
- Corresponding author
- Morales, A.
- Venue
- Journal of Thermal Biology
- Publisher
- Elsevier BV
- Published
- 2018-08
- Volume
- 76
- Pages
- 1-7
- ISSN
- 0306-4565 (ISSN-L)
- OpenAlex
- W2811151933
- Cited by
- 40
- References
- 0
- Citations by year
- 2026: 2 · 2025: 5 · 2024: 8 · 2023: 4 · 2022: 6 · 2021: 7 · 2020: 5 · 2019: 3
- FWCI
- 3.60
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Thermal Biology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Science and Technology Council of México
- Topics
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Effects of Environmental Stressors on Livestock
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
- Health Sciences › Medicine › Physiology › Thermoregulation and physiological responses
- Keywords
- heat stress, pigs, feed intake, body temperature, meal timing, ambient temperature, heat dissipation
- MeSH terms
- Animals, Animal Feed, Body Temperature, Body Temperature Regulation, Eating, Temperature, Heat-Shock Response, Postprandial Period, Sus scrofa
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