Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/34570
metadata.artigo.dc.title: Heat negatively affects lactating swine: a meta-analysis
metadata.artigo.dc.creator: Ribeiro, Bruna Pontara Vilas Boas
Lanferdini, Eloiza
Palencia, Jorge Yair Pérez
Lemes, Marina Alves Gomes
Abreu, Márvio Lobão Teixeira de
Cantarelli, Vinícius de Souza
Ferreira, Rony Antonio
metadata.artigo.dc.subject: Pigs - Lactation
Heat stress
Feed intake
Pigs - Production
Porcos - Lactação
Estresse térmico
Ingestão de alimentos
Porcos - Produção
metadata.artigo.dc.publisher: Elsevier
metadata.artigo.dc.date.issued: May-2018
metadata.artigo.dc.identifier.citation: RIBEIRO, B. P. V. B. et al. Heat negatively affects lactating swine: a meta-analysis. Journal of Thermal Biology, Oxford, v. 74, p. 325-330, May 2018.
metadata.artigo.dc.description.abstract: A meta-analysis was carried out to evaluate the effect of heat on the performance of lactating sows and their litters. The database containing information on the effects heat stress has on the productive and reproductive performance of lactating sows was composed by 20 articles published in international journals from 2000 to 2016, totalizing 2222 lactating sows. The duration of lactation was corrected to 21d. In the studies analyzed, the most representative variables were piglet weight at 21 days (kg) and litter weight at 21 days (kg). Daily ambient temperature (T°C) ranged from 15.0° to 32.0 °C. Rectal temperature and respiratory rate were higher in lactating sows maintained in hot conditions compared to those maintained in the thermal comfort range. The nutrient intake by the lactating sows was inversely proportional to the ambient temperature. The piglets weaned of lactating sows were kept in thermal comfort 90.84 heavier percentage point after 21 days of the piglets of lactating sows kept in heat stress environment. Piglet weight gain exhibited a high and negative correlation with ambient temperature. At 1 °C above the thermal comfort range (from 15° to 25°C) leads to a decrease in food intake (kg/d) and milk yield (kg/d), which represents a high and negative correlation with at room temperature, that is, as the ambient temperature increases, there is less consumption of nutrients, resulting in reduced milk production (less mobilization of nutrients to the mammary gland). Increased respiratory rate is an efficient parameter for evaluating the intensity of heat stress in lactating sows.
metadata.artigo.dc.identifier.uri: https://www.sciencedirect.com/science/article/pii/S030645651830127X?via%3Dihub#!
http://repositorio.ufla.br/jspui/handle/1/34570
metadata.artigo.dc.language: en_US
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