Environmental enrichment as positive welfare of pigs: a review

Ana Paula de Assis Maia, Juliana Sarubbi, Brenda Batista Lemos Medeiros, Daniella Jorge de Moura

Abstract


http://dx.doi.org/10.5902/2236117010746

The competitiveness of Brazilian pig production in the world market depends on their adaptation to global trends and technologies. Animal welfare as a requirement of international markets has generated discussion and questions about the current Brazilian pig farming. The intensive pig farming raises the most serious welfare concerns once it is surrounded by stress factors. Thus, environmental enrichment plays an important role as a simple and effective tool that can ensure the welfare of captive animal. Enrich an environment enhance the physical and psychological health by providing environmental stimuli necessary for encouraging the expression of natural inherent behaviors. Several stimuli which incite an animal´s interest in a positive way can be used to enrich the housing systems, such as offering toys and substrate. This paper reviews the literature concerning environmental enrichment for pigs’ welfare and some methods to enrich the pig housing system.


Keywords


animal behavior, toys, stress, swine production

References


ALBRIGHT, J. L.; ARAVE, C. W. The behaviour of cattle.1997.320 pp.

AMARAL, P.I.S. Programa de iluminação para suí- nos em terminação 2012.34p. Dissertação (Mestrado em Zootecnia), Universidade Federal dos Vales do Jequitinhonha e Mucuri,Diamantina, 2012.

ANDERSEN, I.L.; BOE, K.E.; KRISTIANSEN, A.L. The influenceof different feeding arrangements and food type on competition at feeding in pregnant sows. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 65, n. 2, p. 91-104, Oct, 1999.

AVERÓS, X. et al. A meta-analysis of the combined effect of housing and environmental enrichment characteristics on the behaviour and performance of pigs. Applied Animal Behaviour Science, Elsevier, Amsterdam, v.127, n. 3-4, p. 73–85, Nov., 2010.

BAPTISTA, R.I.A.A.; BERTANI, G.R.; BARBOSA, C.N. Indicadores do bem-estar em suínos. Ciência Rural, Santa Maria, v. 41, n. 10, p. 1823-1830, Oct., 2011.

BEATTIE, V.E., WALKER, N., SNEDDON, I.A., Preference testing of substrates by growing pigs. Animal Welfare, Hertfordshire, v.7, n.1, p.27–34, Feb., 1998.

BEATTIE, V. E.; O´CONNELL, N.E.; MOSS, B.W. Influence of environmental enrichment on the behavior, performance and meat quality of domestic pigs. Livestock Production Science, Elsevier, Amsterdam, v. 65, n. 1-2, p. 71–79, Jul., 2000.

BENCH, C.J.; GONYOU, H.W. Effect of environmental enrichment and breed lineon the incidence of belly nosing in pigletsweaned at 7 and 14 days-of-age. Applied Animal Behaviour Science, Elsevier, Amsterdam, v.105, n. 1-3, p. 26-41, Jun., 2007.

BENCH, C.J. et al. Group gestation sow housing with individual feeding – II: How space allowance group size and composition, and flooring affect sow welfare. Livestock Science, Elsevier, Amsterdam, v. 152, n. 2-3, p. 218-227, Apr., 2013.

BLACKSHAW, J.K. et al. The effect of a fixed or free toy on the growth rate and aggressive behaviour of weaned pigs and the influence of hierarchy on initial investigation of the toys. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 53, n. 3, p. 203-212, Jun., 1997.

BLOOMSMITH, M. A., BRENT, L.Y.; SCHAPIRO, S.J. Guidelines for developing and managing an environmental enrichment program for nonhuman primates. Laboratory Animal Science, Memphis, n. 41, v. 4, p. 372–377, Aug., 1991.

BRADSHAW, R. H. et al. Effects of lavender Straw on Stress and Travel Sickness in Pigs. The Journal of Alternative and Complementary Medicine, New Rochelle, v. 4, n. 3, p. 271-275, Fall, 1998.

BROOM, D. Animal welfare: concepts and measurements. Journal of Animal Science, Champaign, v. 69, v. 10, p. 4167-4175, Oct., 1991.

CAMBRA-LOPEZ, M. et al. Ionization for reducing particulate matter emissions from poultry houses. Transactions of the ASABE, v. 52, p. 1757-1771, 2009.

CANDIANI, D. et al. A combination of behavioral and physiological indicators for assessing pig welfare on the farm. Journal of Applied Animal Welfare Science, Ann. Arbor., v.11, n.1, p.1-13, 2008.

CHALOUPKOVÁ, H. et al. The effect of pre-weaning housing on the play andagonistic behaviour of domestic pigs. Applied Animal Behaviour Science, Elsevier, Amsterdam, v.103, n. 1-2, p. 25-34, Mar., 2007.

CAMPOS, J.A.; TINÔCO, I.F.F., SILVA, F.F.; et al. Enriquecimento ambiental para leitões na fase de creches advindos de desmame aos 21 e 28 dias. Revista Brasileira de Ciências Agrárias, Recife, v. 5, n. 2, p. 272-278, abr-jun, 2010.

CEE. Comunidade Econômica Européia. Directiva 2008/120/CE. Dezembro de 2008. Relativa às normas mínimas de protecção de suínos. 2008. Disponível em: . Acessoem: 15 mar. 2013.

COCCHI, M. et al. Do mood disorders play a role in pig welfare? Italian Journal of Animal Science, Pavia, v. 8, n. 4, p. 691-704, 2009.

COLSON, V. et al. Grouping piglets by sex at weaning reduces aggressive behaviour. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 97, n. 1-2, p. 152-171, May, 2006.

DALLA COSTA, O.A. et al. Aspectos econômicos e de bem-estar animal no manejo dos suínos da granja até o abate. In: SEMINÁRIO INTERNACIONAL DE AVES E SUÍNOS, 4, 2005, Florianópolis. Anais… Disponível em: Acesso em: 01 mai. 2013.

DAY, J.E.L. et al. The separate and interactive effects of handling and environmental enrichment on the behaviour and welfare of growing pigs. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 75, n. 3; p. 177-192, Jan., 2002.

DAY, J.E.L. et al. The effect of varying lengths of straw bedding on the behaviour of growing pigs.

Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 109, n. 2-4, p. 249-260, Feb., 2008.

DEBOER, S.P. et al. Does the presence of a human affect the preference of enrichment items in young, isolated pigs? Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 143, n. 2-4, p. 96-103, Jan., 2013.

DOCKING, C.M. et al. The influence of age on the use of potential enrichment objects and synchronisation of behaviour of pigs. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 110, n. 3-4, p. 244- 257, Apr., 2008.

DOUGLAS, C. et al. Environmental enrichment induces optimistic cognitive biases in pigs. Applied Animal Behaviour Science, Elsevier, Amsterdam, v.139, n.1-2, p.65-73, Jun., 2012.

ELMORE, M.R.P. et al. Differing results for motivation tests and measures of resource use: The value of environmental enrichment to gestating sows housed in stalls. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 141, n. 1-2, p. 9-19, Oct., 2012.

DUNCAN, I.J.H. Science-based assessment of animal welfare: farm animals. Rev. Sci. Tech. Off. Int. Epiz, v. 24, n. 2, p. 483-492, 2005. Disponível em: Acesso em: 24 abr. 2010.

EKACHAT, K., VAJRABUKKA, C. Effect of music rhythm on growth performance of growing pigs. Kasetsart Journal Natural Science, Bangkok, v. 28, n. 4, p. 640-643, oct-dec, 1994.

ELLIS, S. H.; WELLS, D. L. The influence of olfactory stimulation on the behaviour of cats housed in a rescue shelter. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 123, n. 1, p. 56-62, Feb., 2010.

FAYAZI, S.; BABASHAHI, M.; REZAEI, M. The effect of inhalation aromatherapy on anxiety level of the patients inpreoperative period. Iranian Journal of Nursing and Midwifery Research, v. 16, n. 4, p. 278- 283, Autumn, 2011.

FALKENBERG, T. A. K. et al. Increased expression ofbrain-derived neurotrophic factor mRNA in rat hippocampus isassociated with improved spatial memory and enriched environment. Neuroscience Letters, Elsevier, Amsterdam, v. 138, n. 1, p. 153– 156, Apr., 1992.

FAWC - FARM ANIMAL WELFARE COUNCIL. Updates the five freedoms. The Veterinary Record, London, v. 131, p. 357, 1992.

FERNANDES, H.C. et al. Efeito do aquecimento e resfriamento de pisos no desempenho de matrizes e leitões. Revista Ceres, Viçosa, v. 58, n. 6, p. 701-709, nov/dez, 2011.

GENG, Q; GILBERTSSON, M.; NILSSON, M. Effect of ionization on air quality in a pig house –

pilot study. In: INTERNATIONAL CONFERENCE ON BIOINFORMATICS AND BIOMEDICAL

ENGINEERING (ICBBE), 5th, 2011. Proceedings… Disponível em: .Acessoem: 02 nov. 2012.

GIFFORD, A.K.; CLOUTIER, S.; NEWBERRY, R.C. Objects as enrichment: Effects of object exposure time and delay interval on object recognition memory of the domestic pig. Applied

Animal Behaviour Science, Elsevier, Amsterdam, v. 107, n. 3-4, p. 206-217, Nov., 2007.

GRAHAM, L.; WELLS, D.L.; HEPPER, P.G. The influence of olfactory stimulation on the behaviour of dogs housed in a rescue shelter. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 91, n. 1-2, p. 143-153, May, 2005.

GRANDIN, T.; JOHNSON, C. Bem-estar dos animais. São Paulo: Rocco, 2009. 336p.

GU, Z. et al. Effects of neoprene mat on diarrhea, mortality and foreleg abrasion ofpre-weaning piglets. Preventive Veterinary Medicine, Elsevier, Amsterdam, v. 95, n. 1-2, p. 16–22, Jun., 2010.

GUY, J.H.; MEADS, Z.A.; SHIEL, R.S. et al. The effect of combining different environmental enrichment materials on enrichment use by growing pigs. Applied Animal Behaviour Science,Elsevier, Amsterdam, v. 144, n.3, p. 102-107, Mar., 2013.

HFAC - HUMANE FARM ANIMAL CARE. Padrões dos Cuidados com Animais: Porcos. 2008. Disponível em: Acesso em: 15 mar. 2013.

HEMSWORTH, P.H.; PRICE, E.O.; BORGWARDT, R. Behavioural responses ofdomestic pigs and cattle to humans and novel stimuli. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 50, n. 1 p. 43-56, oct.,1996.

HÖTZEL, M.J.; NOGUEIRA, S.S.C.; MACHADO FILHO, L.C.P. Bem-estar de animais de produção: das necessidades animais às possibilidades humanas. Revista de Etologia, São Paulo, v. 9, n. 2, p. 1-10, Dez., 2010.

ICKES, B.R. et al. Long-Term Environmental Enrichment Leads to Regional Increases in Neurotrophin Levels in Rat Brain. Experimental Neurology, Elsevier, Amsterdam, v. 164, n. 1, p. 45-52, 2000.

JANSEN, J. et al. Spatial learning in pigs: effects of environmental enrichment and individual characteristics on behaviour and performance. Animal Cognition, Heidelberg, v. 12, p. 303-315, 2009.

JENSEN, M.B. et al. Pigs’ preferences for rooting materials measured in a three-choice maze-test. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 112, n. 3-4, p. 270-283, Aug., 2008.

JONES, B.R. Role of Comparative Psychology in the Development of Effective Environmental Enrichment Strategis to Improve Poultry Welfare. International Journal of Comparative Psychology, v. 15, n. 2, p. 77-106, 2002.

JONGE, H. F. et al. Music during play-time: Using context conditioning as a tool to improve welfare in piglets. Applied Animal Behaviour Science, Elsevier, Amsterdam,v. 15, n. 3-4, p. 138–148, Dec., 2008.

HADI, N.; HANID, A.A. Lavender Essence for Post-cesarean Pain. Pakistan Journal of Biological

Sciences, v.14, n. 11, p. 664-667, Jun., 2011.

KIEFER, C. et al. Resposta de suínos em crescimento mantidosem diferentes temperaturas. Revista

Archivos de Zootecnia, Córdoba, v.58, n. 221, p. 55-64, Mar., 2009.

KREBS, N. Odors and Pheromones: Influences of Olfaction on Behavior, Physiology, and Performance to reduce Stress in Pigs. 2007. 172p. Dissertation (Doctor of Philosophy in Animal Science) – Texas Tech University, Lubbock, 2007.

LEWIS, C.R.G; HULBERT, L.E.; McGLONE. J.J.Novelty causes elevated heart rate and immune changes in pigs exposed to handling, alleys, and ramps. Livestock Science, Elsevier, Amsterdam, v. 116, n. 1-3, p. 338–341, Jul., 2008.

LIMA, A.L. et al. Resfriamento do piso da maternidade para porcas em lactação no verão. Revista Brasileira de Zootecnia, Viçosa, v. 40, n. 4, p. 804- 811, Abr., 2011

LOPES, E.J.C. Análise do bem-estar e desempenho de suínos em sistema de cama sobreposta. 2004.

p. Dissertação (Mestrado em Agroecossistemas) - Curso de Pós-graduação em Agrossistemas, Universidade Federal de Santa Catarina, SC.

MACHADO FILHO, L.C.P., HÖTELZ, M.J. Bem-estar dos suínos. In: SEMINÁRIO INTERNACIONAL DE SUINOCULTURA, 5, 2000, São Paulo. Anais… São Paulo, p. 1-13.

MALHEIROS, F.M. et. al. Efeitos da utilização de brinquedo suspenso confeccionado com garrafa pet no comportamento e desempenho zootécnico de suínos em fase de creche. In: PORK EXPO – FÓRUM INTERNACIONAL DE SUINOCULTURA, V., 2010., Curitiba. Anais… Campinas: Animal Word, 2010.

MASSARI, J.M. et. al. Efeito da música no bem-estar animal de suínos na fase de creche. In: PORK EXPO – FÓRUM INTERNACIONAL DE SUINOCULTURA, V, 2010., Curitiba. Anais…Campinas: Animal Word, 2010.

MITCHELL, B.W.; RICHARDSON, L.J.; WILSON, J.L.; HOFACRE, C.L. Application of an electrostatic space charge system for dust, ammonia, and pathogen reduction in a broiler breeder house. Applied Engineering in Agriculture, St. Joseph, v. 20, p. 87-93, 2004.

MOINARD, C. et al. A case control study of on-farm risk factors for tail biting in pigs. Applied

Animal Behaviour Science, Elsevier, Amsterdam, v. 81, n. 4, p. 333-355, May, 2003.

MOREIRA, S.V. Neuromusicoterapia no Brasil: aspectos terapêuticos na reabilitação neurológica.

Revista Brasileira de Musicoterapia, ano XIV, n. 12, p. 18-26, 2012.

NILSSON, E. The effects of an activity ball and ropes on pigs’ behaviours. 16p. Thesis. Department

of Physics, Chemistry and Biology, Linköpings Universitet, Linköpings, 2012.

NOWICKI, J.; KLOCEK, C. The effect of aromatized environmental enrichment inpen on social

relations and behavioural profile of newly mixed weaners. Annals of Animal Science, Krakow, v. 12, n.3, p. 403-412, Jul., 2012.

OGUNGBE, A.S.; AKINTOYE, O.H.; IDOWU, B.A. Effects of gaseous ions on the environment and human performance. Trends in Applied Sciences Research, New York, v. 6, n. 2, p.130-133, 2011.

OHL, F.; VAN DER STAAY, F.J. Animal welfare: at the interface between science and society. The

Veterinary Journal, Elsevier, Amsterdam, v. 192, n. 1, p. 13-19, Apr., 2012.

PANDORFI, H. Comportamento bioclimático de matrizes suínas em gestação e o uso de sistemas inteligentes na caracterização do ambiente produtivo: suinocultura de precisão. 2005. 119p. Tese (Doutorado em Agronomia) - Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Piracicaba, 2009.

PEDERSEN, B.K. Comprehensive evaluation of well-being in pigs: Environmental enrichment and

pen space allowance. 1992. 195p. Dissertation (Doctor of Philosophy in Animal Sciences) – Graduate College of University of Illinois at Urbana-Champaign, Urbana-Champaign, 1992.

PEREZ, V.; ALEXANDER, D.D.; BAILEY, W.H. Air ions and mood outcomes: a review and meta-analysis. BMC Psychiatry, London, v. 13, n. 29, [S.p]; Jan, 2013.

PINHEIRO, J.V. A pesquisa com bem estar animal tendo como alicerce o enriquecimento ambiental

através da utilização de objeto suspenso no comportamento de leitões desmamados e seu efeito como novidade. 2009.65p. Dissertação (Mestrado em Nutrição e Produção Animal), Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, 2009.

QUINIOU, N.; NOBLET, J. Influence of high ambient temperatureon performance of multiparous

lactating sows. Journal of Animal Science, Champaign, v. 77, n. 8, p. 2124-2134, Aug., 1999.

REINECKER, D. Music for dogs. Disponível em: .Acesso em: 08 ago. de 2012.

RIESENBERG, A.A. et al. Enriquecimento ambiental na forma de brinquedos para leitões após o desmame. Disponível em: Acesso em: 30 abr. 2013.

RITZ, C.W. et al. Improving in-house air quality in broiler production facilities using an electrostatic space charge system. The Journal of Applied Poultry Research, Champaign, v. 15, n. 2, p. 333-340, Summer, 2006.

RUCHABER, C.M. Efeito do uso da aromaterapia em leitões após o desmame. 2013. 40p. Monografia (Curso de Graduação em Zootecnia) – Universidade Federal de Santa Maria, Palmeira das Missões, 2013.

SABINO, L.A. et al. Comportamento suíno influenciado por dois modelos de maternidade. Revista

Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 15, n. 12, p. 1321-1327, 2011.

SARUBBI, J. Bem-estar dos animais e uso racional de energia elétrica em sistemas de aquecimento para leitões desmamados. 2009.190p. Tese (Doutorado em Engenharia Agrícola), Faculdade de Engenharia Agrícola, Universidade Estadual de Campinas, Campinas, 2009.

SARUBBI, J. et al . Utilização de energia elétrica em diferentes sistemas de aquecimento para leitões desmamados. Engenharia Agrícola, Jaboticabal, v. 30, n. 6, Dec, 2010.

SARUBBI, J. Bem estar animal não se restringe às instalações e equipamentos: o uso de novas tecnologias. In: FÓRUM INTEGRAL DE SUINOCULTURA: TEORIA E PRÁTICA DO BEM ESTAR ANIMAL NA PRODUÇÃO DE SUÍNOS, 1, 2011, Curitiba. Anais... p. 36-50.

SARUBBI, J.; LORINI, D.; MOURA, D.J.; MAIA, A.P.A.; MEDEIROS, B.B.L. Ionização de instalações para suínos em fase de creche: efeitos na qualidade do ar. In: CONGRESSO ABARAVES, XV, 2011, Fortaleza. Anais... Fortaleza: ABRAVES, 2011.

SCOTT, K. et al. Influence of different types of environmental enrichment on the behaviour of finishing pigs in two different housing systems: 1. Hanging toy versus rootable substrate. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 99, n. 3-4, p. 222– 229, Sept., 2006.

SCOTT, K. et al. Influence of different types of environmental enrichment on the behaviour of finishing pigs in two different housing systems. 2. Ratio of pigs to enrichment. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 105, n. 1-3, p. 51-58, Jun., 2007.

SCOTT, K. et al. Influence of different types of environmental enrichment on the behaviour of finishing pigs in two different housing systems: 3. Hanging toy versus rootable toy of the same material. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 116, n. 2-4, p. 186-190, Jan., 2009.

SCHAEFER, A.L. et al. The effect of environment enrichment on aggression in newly weaned pigs.

Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 27, n. 1-2, p. 41-52, Aug., 1990.

SOUZA, S. et al. Teste de preferência de leitões submetidos a escamoteadores enriquecidos com lâmpadas de cor azul. In: CONGRESSO ABRAVES, XV, 2011, Fortaleza. Anais… Fortaleza: ABRAVES, 2011a.

SOUZA, S. et al. Comportamento e preferência de leitões lactentes submetidos ao escamoteador

enriquecido com lâmpadas de cor azul. In: CONGRESSO ABRAVES, XV, 2011, Fortaleza. Anais...

Fortaleza: ABRAVES, 2011b.

SNOWDON, C. T. O significado da Pesquisa em Comportamento Animal. Estudo de Psicologia; São Paulo, v. 4, p.365-373, 1999.

SOMMAVILLA, R. Comportamento e bem-estar de animais zootécnicos. 2008. 69p. Relatório de Estágio Curricular Obrigatório- Medicina Veterinária. Universidade do Estado de Santa Catarina, Centro de Ciências Agroveterinárias, Lages.

SPOOLDER, H. A. M.; S. A. EDWARDS, S. CORNING. Effects of group size and feeder space

allowance on welfare in finishing pigs. Journal of Animal Science, Champaign, v. 69, p. 481–489, 1999.

STUDNITZ, M., JENSEN, M.B., PEDERSEN, L.J. Why do pigs root and in what will they root? A review on the exploratory behaviour of pigs in relation to environmental enrichment. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 107, n. 3-4, p. 183-197, Nov., 2007.

TALLET, C. et al. Effects of neonatal castration on social behaviour, human–animal relationship and feeding activity in finishing pigs reared in a conventional or an enriched housing. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 145, n. 3, p. 70-83, May, 2013.

TANAKA, A.; ZHANG, Y. Dust Settling Efficiency and Electrostatic Effect of a Negative Ionization System. Journal of Agricultural Safety and Health, St. Joseph, v. 2, p. 39-47,1996.

TAKABATAKE, E.Y. A Musicoterapia para cães com depressão. 2007. 36p. Monografia (Graduação do Curso de Musicoterapia) - Faculdade Paulista de Artes, São Paulo. 2007.

TAYLOR, N. et al. Preference of growing pigs for illuminances. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 96, n. 1-2, p.19-31, Jan., 2006.

TRICKETT, S.L.; GUY, J.H.; EDWARDS, S.A. The role of novelty in environmental enrichment for the weaned pig. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 116, n. 1, p. 45-51, Jan., 2009.

TUYTTENS, F.A.M. et al. Synthetic lying mats may improve lyingcomfort of gestating sows. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 114, n. 1, p. 76-85, Nov., 2008.

VAN DE WEERD, H. A. et al. A systematic approach towards developing environmental enrichment for pigs. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 84, n. 2, p. 101-118, Nov., 2003.

VAN DE WEERD, H. A. et al. Effects of species-relevant environmental enrichment on the behaviour and productivity of finishing pigs. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 99, n. 3-4, p. 230-247, Sep., 2006.

VAN DE WEERD, H. A.; DAY, J.E.L. A review of environmental enrichment for pigs housed in intensive housing systems. Applied Animal Behaviour Science, Elsevier, Amsterdam,v. 116, n. 1, p. 1-20, Jan., 2009.

VAN WAGENBERG, A.V. et al. Effect of floor cooling on farrowingsow and litter performance: field experiment under Dutch conditions. Transactions of the American Society of Agricultural and Biological Engineers, St. Joseph, v. 49, n. 5, p. 1521-1527, 2006.

WAGENBERG, A.V. et al. Effect of floor cooling on farrowingsow and litter performance: field experiment under dutch conditions. Transactions of the American Society of Agricultural and Biological Engineering, St. Josheph, v. 49, p. 1521-1527, 2006.

WARAN, N.K.; BROOM, D.M. The influence of a barrier on the behaviour and growth of early-weaned piglets. Animal Production, v. 56, n. 1, p. 115-119, Feb., 1993.

WELLS, D.L. Sensory stimulation as environmental enrichment for captive animals: A review. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 118, n. 1-2, p. 1-11, Apr., 2009.

YEATES, J.W.; MAIN, D.C.J. Assessment of positive welfare: a review. The Veterinary Journal, Elsevier, Amsterdam, v.175, p. 293-300, 2008.

ZWICKER, B. et al. Short- and long-term effects of eight enrichment materials on the behaviour of

finishing pigs fed ad libitum or restrictively. Applied Animal Behaviour Science, Elsevier, Amsterdam, v. 144, n. 1-2, p. 31-38, Feb., 2013.

ZWIRTES, M. Comportamento de suínos em fase de creche submetidos a baias com diferentes disposições de brinquedos. 2013. 31p. Monografia (Curso de Graduação em Zootecnia) – Universidade Federal de Santa Maria, Palmeira das Missões, 2013.




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