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| Author(s): |
Alexandra Ferreira da Silva Cordeiro
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Agrícola |
| Defense date: | 2012-08-14 |
| Examining board members: |
Irenilza de Alencar Nääs;
Fabiana Ribeiro Caldara;
Mario Mollo Neto;
Stanley Robson de Medeiros Oliveira;
Daniella Jorge de Moura
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| Advisor: | Irenilza de Alencar Nääs |
| Abstract | |
Among the challenges in today's competitive market hog stands out for the product traceability, that ensures many points between the issue of animal welfare. The objective of this research is to estimate the energy expenditure of the vocalization of piglets in a situation of pain and identify pigs and their stress condition for their vocalization. The first hypothesis is that it is possible to estimate the energy expended in vocalization. The second is that pigs can be identified by their vocalizations, and the third is that it is possible to identify the state of well-being or stress of pigs by their vocalization. For this purpose, two experiments were conducted in commercial farm, in the city of Holambra-SP. In the first experiment, we analyzed the vocalizations of two groups of piglets during castration, one group with local anesthesia and the other without anesthesia. The energy emitted in the voice signal was obtained in Matlab ®. In the second experiment we analyzed the vocalizations of piglets during caudectomia, marking and castration. In the third experiment, it was performed recording of the vocalization of piglets in the stages of farrowing, nursery, growing and finishing in different situations of stress: no stress and thermal stress, hunger, thirst and pain. The software Praat® was used for analyzing of sound signals. It was possible to estimate the energy expended in the vocalization of pigs, and identify the stress conditions by using their vocalization as input variable. However, it was not possible to identify animals by their vocalization (AU) | |
| FAPESP's process: | 10/08500-4 - The use of vocalization as a tool for identifying swine, welfare assessment and estimation of the loss of energy during vocal expression |
| Grantee: | Alexandra Ferreira da Silva Cordeiro |
| Support Opportunities: | Scholarships in Brazil - Doctorate |