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RESEARCH ARTICLE
Contents Vol 64(4)

Effect of heat stress on the reproductive performance of sows: comparison of different thermal-comfort indices in a temperate climate

Abel Villa-Mancera https://orcid.org/0000-0002-5997-5641 A * , Maricela Méndez-Rosas https://orcid.org/0000-0003-1672-5295 A B and Juan Cruz-Aviña https://orcid.org/0000-0002-0905-9370 A
+ Author Affiliations
- Author Affiliations

A Facultad de Medicina Veterinaria y Zootecnia, Benemérita Universidad Autónoma de Puebla, Tecamachalco Puebla, Mexico.

B Programa de Maestría en Producción Animal Sostenible, Benemérita Universidad Autónoma de Puebla, Tecamachalco Puebla, Mexico.

* Correspondence to: abel.villa@gmail.com

Handling Editor: Surinder Chauhan

Animal Production Science 64, AN23181 https://doi.org/10.1071/AN23181
Submitted: 19 May 2023  Accepted: 21 January 2024  Published: 13 February 2024

© 2024 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Context

Heat stress is a major environmental factor negatively affecting animal health and production efficiency of the sow, and causes significant economic losses to the global pig industry. Researchers have developed various thermal indices with different characteristics for assessing the level of heat stress in pigs, including the temperature–humidity index (THI), black globe–humidity index (BGHI), effective temperature (ET), equivalent temperature index of sows (ETIS), and enthalpy (H), among others.

Aims

The aim of this study was to evaluate the effect of heat stress on reproductive performance by using different thermal indices based on environmental variables in a temperate climate and to compare the goodness-of-fit among them.

Methods

In total, 2951 sow reproductive records were analysed for a Puebla farm in the northern hemisphere.

Key results

The overall means for pregnancy, farrowing, and abortion rates over the period from January to December 2020 were 83.1%, 80.67%, and 5.2%, whereas temperature, relative humidity, and air velocity were 24.3°C, 63.0%, and 3.7 m/s respectively. The highest rates of pregnancy and farrowing over the study period were observed in March, while the abortion rate was highest in December. However, the mean daily temperatures exceeded 25°C between March and June, being higher the upper limit of the thermoneutral zone for sows. Many thermal indices have been used to estimate the level of heat stress in pigs, such as the THI, BGHI, ET, and ETIS. We used 11 thermal indices to measure the degree of heat stress affecting fertility traits of animals. Pregnancy and farrowing rates were highest for THI2 and THI6 values, reflecting moderate stress at pregnancy and farrowing periods. Statistically significant differences were found between the THI2, THI4, THI6, and ET values and the pregnancy, farrowing, and abortion rates (P < 0.05).

Conclusions

Our results showed that the THI2 performs better for evaluating the level of heat stress in sows than do other thermal-comfort indices such as the THI4, THI6, and ET.

Implications

These results may be useful for accurate assessment of heat stress to mitigate its effects and avoid significant economic losses in sows in temperate climates.

Keywords: abortion, environment, farrowing, heat stress, pregnancy, reproductive performance, seasonal infertility, sow, temperature–humidity index, thermal indices.

References

Auvigne V, Leneveu P, Jehannin C, Peltoniemi O, Salle E (2010) Seasonal infertility in sows: a five year field study to analyze the relative roles of heat stress and photoperiod. Theriogenology 74, 60-66.
| Crossref | Google Scholar | PubMed |

Baert S, Aube L, Haley DB, Bergeron R, Devillers N (2022) The protective role of wallowing against heat stress in gestating and lactating sows housed outdoors. Physiology & Behavior 254, 113898.
| Crossref | Google Scholar | PubMed |

Becker CA, Collier RJ, Stone AE (2020) Invited review: physiological and behavioral effects of heat stress in dairy cows. Journal of Dairy Science 103, 6751-6770.
| Crossref | Google Scholar | PubMed |

Bjerg B, Rong L, Zhang G (2018) Computational prediction of the effective temperature in the lying area of pig pens. Computers and Electronics in Agriculture 149, 71-79.
| Crossref | Google Scholar |

Buffington DE, Collazo-Arocho A, Canton GH, Pitt D, Thatcher WW, Collier RJ (1981) Black globe–humidity index (BGHI) as comfort equation for dairy cows. Transactions of the ASAE 24, 711-714.
| Crossref | Google Scholar |

Cao M, Zong C, Zhuang Y, Teng G, Zhou S, Yang T (2021a) Modeling of heat stress in sows Part 2: comparison of various thermal comfort indices. Animals 11, 1498.
| Crossref | Google Scholar |

Cao M, Zong C, Wang X, Teng G, Zhuang Y, Lei K (2021b) Modeling of heat stress in sows-Part 1: establishment of the prediction model for the equivalent temperature index of the sows. Animals 11, 1472.
| Crossref | Google Scholar |

De Rensis F, Ziecik AJ, Kirkwood RN (2017) Seasonal infertility in gilts and sows: aetiology, clinical implications and treatments. Theriogenology 96, 111-117.
| Crossref | Google Scholar | PubMed |

Fehr RL, Priddy KT, McNeill SG, Overhults DG (1983) Limiting swine stress with evaporative cooling in the southwest. Transactions of the ASAE 26, 542-545.
| Crossref | Google Scholar |

Gadea J, Sellés E, Marco MA (2004) The predictive value of porcine seminal parameters on fertility outcome under commercial conditions. Reproduction in Domestic Animals 39, 303-308.
| Crossref | Google Scholar | PubMed |

García E (2004) Modificaciones al sistema de clasificación climática de Köppen. 5th Ed. p. 1–92. (Instituto de Geografía. Universidad Nacional Autónoma de México (UNAM), México, DF)

Gernand E, Konig S, Kipp C (2019) Influence of on-farm measurements for heat stress indicators on dairy cow productivity, female fertility, and health. Journal of Dairy Science 102, 6660-6671.
| Crossref | Google Scholar | PubMed |

Godyn D, Herbut P, Angrecka S, Correa Vieira FM (2020) Use of different cooling methods in pig facilities to alleviate the effects of heat stress: a review. Animals 10, 1459.
| Crossref | Google Scholar |

INEGI (2017) Anuario Estadístico y geográfico de los Estados Unidos Mexicanos. Instituto Nacional de Estadística y Geografía.

Ingram DL (1965) The effect of humidity on temperature regulation and cutaneous water loss in the young pig. Research in Veterinary Science 6, 9-17.
| Crossref | Google Scholar | PubMed |

Kelly CF, Bond TE (1971) Bioclimatic factors and their measurement. In ‘A guide to environmental research on animals’. (Ed. National Research Council) pp. 7–92. (National Academies Press: Washington, DC, USA)

Kuhl R, Dias CHFZ, Alberton GC, Granzotto F, Vicentin JH, Santos ALd (2023) Thermal comfort and photoperiod on the productive performance of sows and piglets. Ciência Rural 53, e20210894.
| Crossref | Google Scholar |

Liu F, Zhao W, Le HH, Cottrell JJ, Green MP, Leury BJ, Dunshea FR, Bell AW (2022) Review: what have we learned about the effects of heat stress on the pig industry? Animal 16(Suppl 2), 100349.
| Crossref | Google Scholar |

Maust LE, McDowell RE, Hooven NW (1972) Effect of summer weather on performance of Holstein cows in three stages of lactation. Journal of Dairy Science 55, 1133-1139.
| Crossref | Google Scholar |

Mayorga EJ, Renaudeau D, Ramirez BC, Ross JW, Baumgard LH (2019) Heat stress adaptations in pigs. Animal Frontiers 9, 54-61.
| Crossref | Google Scholar | PubMed |

Mellado M, Gaytán L, Macías-Cruz U, Avendaño L, Meza-Herrera C, Lozano EA, Rodríguez Á, Mellado J (2018) Effect of climate and insemination technique on reproductive performance of gilts and sows in a subtropical zone of Mexico. Austral Journal of Veterinary Sciences 50, 27-34.
| Crossref | Google Scholar |

National Oceanic Atmospheric Administration (NOAA) (1976) Livestock hot weather. Regional Operations Manual Letter C-31–76. US Department Commerce. National Weather Service Central Region, US Government.

National Weather Service Central Region (NWSCR) (1976) Livestock hot weather stress. Regional operations manual letter. US Department Commerce. National Weather Service Central Region, Kansas City, MO, USA.

Pachauri RK, Allen MR, Barros VR, Broome J, Cramer W, Christ R, Church JA, Clarke L, Dahe Q, Dasgupta P, et al. (2014) Climate change 2014: synthesis report. Contribution of Working Groups I, II and III to the fifth assessment report of the Intergovernmental Panel on Climate Change. IPCC.

Ross JW, Hale BJ, Gabler NK, Rhoads RP, Keating AF, Baumgard LH (2015) Physiological consequences of heat stress in pigs. Animal Production Science 55, 1381-1390.
| Crossref | Google Scholar |

Ross JW, Hale BJ, Seibert JT, Romoser MR, Adur MK, Keating AF, Baumgard LH (2017) Physiological mechanisms through which heat stress compromises reproduction in pigs. Molecular Reproduction and Development 84, 934-945.
| Crossref | Google Scholar | PubMed |

St-Pierre NR, Cobanov B, Schnitkey G (2003) Economic losses from heat stress by US livestock industries. Journal of Dairy Science 86, E52-E77.
| Crossref | Google Scholar |

Thom EC (1958) Cooling degrees-days air conditioning, heating, and ventilating. Transaction of the ASAE 55, 65-72.
| Google Scholar |

Thom EC (1959) The discomfort index. Weatherwise 12, 57-61.
| Crossref | Google Scholar |

Thornton P, Nelson G, Mayberry D, Herrero M (2021) Increases in extreme heat stress in domesticated livestock species during the first century. Global Change Biology 27, 5762-5772.
| Crossref | Google Scholar | PubMed |

Wegner K, Lambertz C, Das G, Reiner G, Gauly M (2014) Climatic effects on sow fertility and piglet survival under influence of a moderate climate. Animal 8, 1526-1533.
| Crossref | Google Scholar | PubMed |

Williams AM, Safranski TJ, Spiers DE, Eichen PA, Coate EA, Lucy MC (2013) Effects of a controlled heat stress during late gestation, lactation, and after weaning on thermoregulation, metabolism, and reproduction of primiparous sows. Journal of Animal Science 91, 2700-2714.
| Crossref | Google Scholar | PubMed |

Xiong L, Zhang WF, Zhao H, Tian ZZ, Ren M, Chen F, Guan WT, Zhang SH (2022) Dietary supplementation of enzymatically treated Artemisia annua L. improves lactation performance, alleviates inflammatory response of sows reared under heat stress, and promotes gut development in preweaning offspring. Frontiers in Veterinary Science 9, 843673.
| Crossref | Google Scholar | PubMed |

Young B, Dewey CE, Friendship RM (2010) Management factors associated with farrowing rate in commercial sow herds in Ontario. The Canadian Veterinary Journal 51, 185-189.
| Google Scholar | PubMed |