The Use Of Artificial Neural Network In Identifying Swine Vocalization [uso De Redes Neurais Artificiais Na Identificação De Vocalização De Suínos]

Animal welfare has been an important research topic in animal production mainly in its ways of assessment. Vocalization is found to be an interesting tool for evaluating welfare as it provides data in a non-invasive way as well as it allows easy automation of process. The present research had as objective the implementation of an algorithm based on artificial neural network that had the potential of identifying vocalization related to welfare pattern indicatives. The research was done in two parts, the first was the development of the algorithm, and the second its validation with data from the field. Previous records allowed the development of the algorithm from behaviors observed in sows housed in farrowing cages. Matlab® software was used for implementing the network. It was selected a retropropagation gradient algorithm for training the network with the following stop criteria: maximum of 5,000 interactions or error quadratic addition smaller than 0.1. Validation was done with sows and piglets housed in commercial farm. Among the usual behaviors the ones that deserved enhancement were: the feed dispute at farrowing and the eventual risk of involuntary aggression between the piglets or between those and the sow. The algorithm was able to identify through the noise intensity the inherent risk situation of piglets' welfare reduction.282204216ALGERS, B., JENSEN, P., Communication during suckling in the domestic pig effects of continuos noise (1985) Applied Animal Behaviour Science, 14 (1), pp. 49-61. , Londres, vBECKER, G.B., (2004) Bem-estar animal, , www.porkworld.com.br, Disponível em:, Acesso em: 9 fev. 2005CHEDAD, A., MOSHOU, D., AERTS, J.M., HIRTUM, A., Van, RAMON, H., BERCKMANS, D., Recognition system for pig cough based on probabilistic Neural Networks (2001) Journal of Agricultural Research, 79 (4), pp. 449-457. , Bristol, vDAWKINS, M.S., COOK, P.A., WHITTINGHAM, M.J., MANSELL, K.A., HARPER, A.E., What makes free-range broiler chickens range? In situ measurement of habitat preference (2003) Animal Behaviour, 66 (1), pp. 151-160. , London, vFRASER, A.F., BROOM, D.M., Farm animal behaviour and welfare (1990) Londres: B, , 3rd ed, Tindall, 246 pFRASER, D., The vocalization and other behaviour of growing pigs in an "open field" test (1974) Applied Animal Ethology, 1 (1), pp. 13-16. , Edinburgo, vGRANDIN, T., The feasibility of using vocalization scoring as an indicator of poor welfare during slaughter (1998) Applied Animal Behaviour Science, 56 (2), pp. 121-128. , Bristol, vGRAUVOGL, A., (1958) Über das Verhalten des Hausschweines unter besonderer Berücksichtigung des Fortpflanzungsverhaltens, , Berlin: Freie Universität, 112 pHAY, M., VULIN, A., GÉNIIN, S., SALES, P., PUNIER, A., Assessment of pain induced by castration in piglets: Behavioral and physiological responses over the subsequent 5 days (2003) Applied Animal Behavior Science, 82 (3), pp. 201-218. , Bristol, vHAYKIN, S.S., (2001) Redes neurais: Princípios e práticas, , Porto Alegre: Bookman, 236 pHEIER, B.T., HOGASEN, H.R., JARP, J., Factors associated with mortality in Norwegian broiler flocks (2002) Preventive Veterinary Medicine, 53 (1-2), pp. 147-158. , Ithaca, vJENSEN, P., ALGERS, B., An ethogram of piglet vocalizations during suckling (1984) Applied Animal Ethology, 11, pp. 237-248. , Edinburgo, vKILEY, M., The vocalisations of ungulates, their causation and function (1972) Tierpsychologie, 31 (1), pp. 171-222. , Dusseldorf, vKLINGHOLZ, F.: MEYNHARDT, H. Lautinventare der S.augetiere - diskret oder kontinuierlich, Zeitschrift. Tierpsychologie, Dusseldorf, v.50, n.1, p.250-64, 1979LE NEINDRE, P.GUÉMENÉ, D.ARNOULD, C.LETERRIER, C.FAURE, J.M.PRUNIER, A.MEUNIER-SALAÜN, M.C. Space, environmental design and behaviour: Effect of space and environment on animal welfare. In: GLOBAL CONFERENCE ON ANIMAL WELFARE: AN OIE INITIATIVE. 2004. Disponível em: www.oie.int/eng/Welfare_2004/Conference.htm. Acesso em: 24 fev. 2005MANTEUFFEL, G., PUPPE, B., SCHÖN, P.C., Vocalization of farm animal as a measure of welfare (2004) Applied Animal Behaviour Science, 88 (1), pp. 163-182. , Bristol, vMANTEUFFEL, G., SCHÖN, P.C., Measuring pig welfare by automatic monitoring of stress calls (2002) Agrartechische Berichte, Bornim, 29 (1), pp. 110-118McINERNEY, J.P., Animal welfare, economics and policy - report on a study undertaken for the Farm & Animal Health Economics Division of Defra, , www.defra.gov.uk/esg/reports/animalwelfare.pdf, February 2004. Disponível em:, Acesso em: 16 jun. 2004PRESCOTT, N.B., WATHES, C.M., Preference and motivation of laying hens to eat under different illuminances and the effect of illuminance on eating behaviour (2002) British Poultry Science, 43 (2), pp. 190-195. , Londres, vREBY, D., LEK, S., DIMOPOULOS, I., JOACHIM, J., LAUGA, J., AULAGNER, S., Artificial Neural Networks as a classification method in behavioural sciences (1997) Behavioural Process, 40, pp. 35-43. , Londres, vROLLIN, B.E., (1995) Farm animal welfare: Social, bioethical, and research issues, , Ames: Iowa State University Press, 168 pSCHÖN, P., PUPPE, B., GROMYKO, T., MANTEUFFEL, G., Common features and individual differences in nurse grunting of domestic pig (Sus Scrofa) a multi-parametric analysis (1999) Animal Behaviour, 136, pp. 49-66. , London, vWEARY, D.M., APPLEBY, M.C., FRASER, D., Response of piglets to early separation from the sow (1999) Applied Animal Behaviour Science, 63 (2), pp. 289-300. , Bristol, vWEARY, D.M., BRAITHWAITE, L.A., FRASER, D., Vocal response to pain in piglets (1998) Applied Animal Behavior Science, 56 (2-4), pp. 161-172. , Bristol, vWEARY, D.M., ROSS, S., FRASER, D., Vocalizations by isolated piglet: Reliable indicator of piglet need directed towards the sow (1997) Applied Animal Behaviour Science, 53, pp. 249-257. , Bristol, vWENNRICH, G., Zum lautinventar bei haushühnern (Gallus f. domesticus). (1981) Berl Münch Tierärztl Wschr, 94, pp. 90-95. , Berlim,