Evaluating the influence of noise emitted by environmental enrichment equipment in routine farrowing management practices
Keywords:rooftop sprinklers, decibel meter, swine, rectal temperature, surface temperature, fans
The installation of fans and rooftop sprinklers in swine housing and management facilities can increase noise intensity and may impair workers' hearing health over longs periods of time; therefore, an assessment of the piglets’ stress during invasive practices was made. This study set out to evaluate the noise intensity emitted by environmental enrichment devices (fans and rooftop sprinklers) and by piglets restrained for body temperature assessments and its effect on animal welfare and on the hearing health of workers exposed to it for long periods. Twenty piglets ranging in age from five to twenty days were observed. The sow gestation area was divided into a cooled (fans and rooftop sprinklers) and uncooled area. Two decibel meters were used to measure noise intensity, one for the general noise in the facilities and the other for the piglets, with five-minute intervals between assessments. Digital thermometers were used to take the rectal temperature, and infrared thermometers were used to take the body surface temperature. Fixed-effects ANOVA for the housing environment and periods and multiple comparisons at a significance level of 5% were applied. The average dorsal temperature of the piglets was 36 °C ± 1.2 in the cooled area and 38.4 °C ± 0.5 in the uncooled area. In both periods, the average maximum noise intensity was over 100 decibels. In the afternoon, the maximum intensity was higher for the uncooled environment. The results indicate that neither the fans nor the rooftop sprinklers installed in the facilities nor the squealing piglets during restraint affect the noise intensity of the environment. However, the noise intensity demonstrates the piglets’ stress and the need for protective equipment to preserve the workers’ hearing health.
BRAZIL. 1992. Regulatory Standard for Personal Protective Equipment - NR 6: Ordinance No. 6, of 19/08/1992. Available in: http: // www.tem.gov.br/temas/SegSau/Normas Regulamentadoras. Accessed in: May 2020.
BRAZIL. 2000. Consolidation of work law. Decree-Law No. 5,452, of May 1, 1943. Approves the consolidation of labor laws. Atlas, São Paulo. Available in: http: // www.tem.gov.br/temas/SegSau/Normas Regulamentadoras. Access in: May 2020.
BRAZIL. 2011. Ministry of Labor and Employment. NR nº15: Unhealthy Activity and Operations. Available in: http: // www.tem.gov.br/temas/SegSau/Normas Reguladoras. Accessed in: Jun. 2020.
COLEMAN GJ & HEMSWORTH PH. 2014. Training to improve stockperson beliefs and behaviour towards livestock enhances welfare and productivity. Revue Scientifique et Technique (International Office of Epizootics) 33: 131-137.
CORDEIRO AFS et al. 2012. Efficiency of distinct data mining algorithms for classifying stress level in piglets from their vocalization. Engenharia Agrícola 32: 208-216.
DÜPJAN S et al. 2008. Differential vocal responses to physical and mental stressors in domestic pigs. Applied Animal Behavioral Science 114: 105-115.
GIRALT JM. 2002. Valoración del estrés de captura, transporte y manejo en el corzo (Capreolus capreolus): efecto de la acepromacina y de la cautividad. Tesis (Doctor em Veterinaria). Barcelona: Universitat Autònoma de Barcelona. 63p.
GONÇALVES CGO et al. 2009. Occupational exposition to noise in dentists of State Paraná: perception and effects onhearing. Revista de Odontologia UNESP 38: 235-243.
HESSING MJ et al. 1994. Individual behavioral and physiological strategies in pigs. Physiology & Behavior 55: 39-46.
KLATTE M et al. 2013. Does noise affect learning? A short review on noise effects on cognitive performance in children. Frontiers in Psychology 4: 578.
KÖPPEN. 2011. Clima dos Municípios Paulistas. Informações sobre o Clima-Pirassununga, São Paulo. Available in: http://www.cpa.unicamp.br/outras-informacoes/clima-dosmunicipiospaulistas.html. Accessed in: 20 apr. 2011.
LEAL PM & NÃÃS IA. 1992. Ambiência animal. In: CORTEZ LAB & MAGALHÃES PSG (Org.). Introdução à engenharia agrícola. Campinas: Unicamp. p.121-135.
MARCHANT JN et al. 2001. Vocalizations of the adult female domestic pig during a standard human approach test and their relationships with behavioral and heart rate measures. Applied Animal Behavioral Science 72: 23-39.
MARQUES AFS et al. 2016. Assessment of noise levels emitted by electro rural equipment used in the production of feed and fodder processing. Caderno de Ciências Agrárias 8: 1-6.
MOI M et al. 2014. Vocalization data mining for estimating swine stress conditions. Engenharia Agrícola 34: 445-450.
PMAC. 1994. Exposição ao ruído: Norma para a proteção de trabalhadores que trabalham em atividades com barulho. Revista Proteção 29: 136-138.
VIEIRA SDG. 1997. Análise ergonômica do trabalho em uma empresa de fabricação de móveis tubulares. Dissertação (Mestrado em Tecnologia). Florianópolis: UFSC. 25p.
WHO. 1999. WORLD HEALTH ORGANIZATION. Guidelines for community noise. Available in: http//:www.who.int/destore/peh/noise/guidelines2.html. Accessed in: 10 May 2020.
Copyright (c) 2020 Revista de Ciências Agroveterinárias (Journal of Agroveterinary Sciences)
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Authors publishing in this journal are in agreement with the following terms:
a) Authors maintain the copyrights and concede to the journal the copyright for the first publication, according to Creative Commons Attribution Licence.
b) Authors have the authority to assume additional contracts with the content of the manuscript.
c) Authors may supply and distribute the manuscript published by this journal.