Uso da vocalização como indicador patológico em leitões na fase de maternidade

Risi, Natalia

doi:10.11606/d.11.2010.tde-23062010-093056

Cited by 3 publications

(5 citation statements)

References 32 publications

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“…However, the duration of the signal was the only parameter that differed from all stressful situations. The length of the calls of the sound pig was higher (0.14 to 2.31 s) than that of the pig with arthritis (0.15 to 1.88 s) (Risi, 2010). These results differ from those in the present study in which the duration of the signal was lower when pigs were under management stress.…”

Section: A B Ccontrasting

confidence: 99%

“…That could be associated with pain on a scale from normal until de castration, which is referred to the highest pain level known in pigs (Tallet et al, 2013). Risi et al (2010) found a lower intensity (79.76 dB) for sound pigs than animals affected by arthritis (78.15 dB). In the current study, the signal intensity was lower in the animals not exposed to painful management (70.41 dB) than that recorded during pig marking (77.64 dB), caudectomy (88.31 dB), and castration (87.39 dB).…”

Section: Resultsmentioning

confidence: 99%

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The Use of Vocalization Signals to Estimate the Level of Pain in Piglets

et al. 2018

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Pain is considered a condition that most affect the welfare of animals and its measurement is seen as a difficult task. This research aimed to determine the level of pain in pigs by their vocalization. It was recorded the vocalizations of 20 male piglets under normal circumstances (I), marking by Australian method (II), tail trimming management (III), and castration (IV). A unidirectional microphone and a digital recorder were used to record the sound signals. The results suggested that Pitch frequency (Hz), the maximum amplitude (Pa), and intensity (dB) increased from pain-free pigs to the marking procedure; and from marking to both tail trimming and castration The tail trimming and castration vocal response did not differ.

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Section: A B Ccontrasting

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The Use of Vocalization Signals to Estimate the Level of Pain in Piglets

et al. 2018

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“…According to the generated tree, if the average of the formants frequencies is greater than 2,671.99, then the animal is in pain, and if this attribute is lower, then the animal is pain-free. Evaluating the frequencies of the first four formants of vocalizations from healthy and arthritic pigs, it was found that the frequencies from the first two harmonics, belonging to the healthy animals were larger than in the arthritic ones [ 19 ]. However, the frequencies of the third and fourth formants from healthy animals were smaller than in the arthritic ones.…”

Section: Resultsmentioning

confidence: 99%

“…Excited pigs produce high tone vocalizations [ 7 ], and piglets in pain distress can be differentiated by the altered types of calls such as squeals that significantly differ from the other calls [ 2 ]. Furthermore, animals in pain distress also emit longer vocalizations [ 19 ] and could be distinguished from the others, even by the human ear. Nevertheless, it was not possible to confirm differences among the other tested distresses just by hearing the animals.…”

Section: Resultsmentioning

confidence: 99%

Understanding Vocalization Might Help to Assess Stressful Conditions in Piglets

Cordeiro

Nääs

Oliveira

et al. 2013

Animals

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Simple SummaryThis research aimed to analyze the possibility of assessing piglets’ welfare using the records of their vocalization. The trial was done in a pig commercial farm, and we recorded the vocal signals from piglets in several stressful exposure situations. Data mining techniques were applied to the processed signals in order to obtain a stress classification using the recorded data. We found that, using the piglets’ vocalization, it was possible to identify the most frequent stressful conditions at the farrowing phase, namely: pain, cold and hunger.AbstractAssessing pigs’ welfare is one of the most challenging subjects in intensive pig farming. Animal vocalization analysis is a noninvasive procedure and may be used as a tool for assessing animal welfare status. The objective of this research was to identify stress conditions in piglets reared in farrowing pens through their vocalization. Vocal signals were collected from 40 animals under the following situations: normal (baseline), feeling cold, in pain, and feeling hunger. A unidirectional microphone positioned about 15 cm from the animals’ mouth was used for recording the acoustic signals. The microphone was connected to a digital recorder, where the signals were digitized at the 44,100 Hz frequency. The collected sounds were edited and analyzed. The J48 decision tree algorithm available at the Weka® data mining software was used for stress classification. It was possible to categorize diverse conditions from the piglets’ vocalization during the farrowing phase (pain, cold and hunger), with an accuracy rate of 81.12%. Results indicated that vocalization might be an effective welfare indicator, and it could be applied for assessing distress from pain, cold and hunger in farrowing piglets.

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“…In swine production, vocalization is an important tool used to identify animal welfare (MOURA et al, 2008), to determine pathologies (RISI, 2010) and to assess the thermal comfort thresholds (TOLON et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Energy expenditure in vocalizations of pigs under stress

et al. 2013

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Modern swine production faces many challenges nowadays, among which are productivity growth, meat quality improvement, decrease of environmental damage and reduction of cost production. Pigs spend energy to vocalizing, especially when they undergo stress. The waste of energy can increase the cost of production and lead to greater environmental damage. The goal of this study was to estimate the energy spent by pigs under the stress of castration and its effect on the animals' weight gain. Two groups of ten animals each were castrated, being one group with local anesthetic and the other without anesthetic. The piglets' vocalizations were recorded during different stages of the neutering process and then estimated of the amount of energy emitted during each vocalization. Afterwards, this energy was associated with the animals' weight gain. There was no difference in the total energy spent in both groups, since the energy used during the application of anesthetic was similar to the energy spent during the castration of the animals without anesthetic. There was also no correlation between energy spent and the animals' weight gain. It was possible to estimate the amount of energy emitted through vocalization. This energy spent by piglets in pain was greater than in other handling situations (contention, weighting and realease).KEYWORDS: animal well-being, signal analysis, swine production. GASTOS DE ENERGIA NA VOCALIZAÇÃO DE SUÍNOS SOB ESTRESSE RESUMO:A suinocultura moderna enfrenta muitos desafios, dentre os quais o crescimento da produtividade, a melhoria da qualidade de carne, a redução de danos ambientais e a redução de custo de produção. Suínos gastam energia na vocalização, especialmente quando submetidos a determinado estresse. O desperdício de energia pode aumentar o custo de produção e conduzir a um maior dano ambiental. O objetivo deste estudo foi estimar a energia gasta pelos leitões sob o estresse da castração e seu efeito sobre o ganho de peso dos animais. Dois grupos de dez animais cada foram castrados, sendo um grupo com anestesia local e outro sem anestesia. As vocalizações dos leitões foram gravadas durante as diferentes fases do processo de castração, sendo objeto de uma estimativa da quantidade de energia emitida durante cada vocalização. Posteriormente, esta energia foi associada com o ganho de peso dos animais. Não houve diferença no gasto total da energia em ambos os grupos, uma vez que a energia utilizada durante a aplicação da anestesia foi semelhante à energia gasta durante a castração dos animais sem anestesia. Também não houve correlação entre a energia gasta e o ganho de peso dos animais. Foi possível estimar a quantidade de energia emitida através de vocalização. Esta energia gasta por leitões com dor foi maior do que em outras situações de manejo (contenção, pesagem e soltura). PALAVRAS-CHAVE:bem-estar animal, análise de sinais, produção de suínos.

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Uso da vocalização como indicador patológico em leitões na fase de maternidade

Cited by 3 publications

References 32 publications

The Use of Vocalization Signals to Estimate the Level of Pain in Piglets

The Use of Vocalization Signals to Estimate the Level of Pain in Piglets

Understanding Vocalization Might Help to Assess Stressful Conditions in Piglets

Energy expenditure in vocalizations of pigs under stress

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