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Factors affecting the electrical impedance of growing-finishing pigs
Authors: J.J. Matte, S. Robert, L. Godcharles, J. Bertin-Mahieux and G.-P. Marineau
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Download file: https://library.csbe-scgab.ca/docs/journal/34/34_2_189_ocr.pdf
Published in: CBE Journal » CBE Journal Volume 34 (1992)
Download RAW file: https://library.csbe-scgab.ca/docs/journal/34/34_2_189_raw.pdf
DOI:
Description: In a firsttrial, 12 pigs between the ages of 9 and 22 weeks were used in a 2 x 2 factorial design to measurethe effect of 2 levels of 60 Hz ac voltage (2 and 5 V) and 2 flooring conditions (woven wire covered with water (WW) or dry (WD))on totalbodyimpedance (TBI).Whatever theageof the animal or the flooring conditions, theoverall TBI was higher (P<0.003) at2 Vthan at 5V(1300 vs 1091 ft). Theeffect of ageonTBIwasdependent upon the wetness of the floor (P< 0.01). At 10 weeksof age, TBI was higheron WD than onWW(3041 vs 1031 ft) while the correspondingdifference, at 18 weeks of age, was lesspronounced (1036vs 778ft). From18to 22 weeks, thedecrease ofTBIpersisted on both flooring conditionsbut wasmoremarked on WW(17%) than on WD (7%). This reduction in TBI with age could be explained by the increase of the contact area and of the pressure exerted by hooveson the floor, which are major factors influencing thequality of floor-hooves contact. In asecond trial, two15week-old pigs were used in a factorial arrangement of treatments (2 x 3 x4) to measure the effects of voltage (1 and 2 V), current frequency (60, 1000,3000 and 10,000 Hz) and flooring surfaces (WW, WD and a copper plate covered with water, (CW)) on TBI.Nodifference (P > 0.38) could be measured between the 1 V and the 2 V treatments. Whatever the voltage, the overall value of TBI at 60 Hz onCWwas lower (P < 0.01) than on WD but similar to that measured on WW. However, as current frequency increased, the differences among surfaces disappeared (P < 0.05). These results indicate that a greater amountof current could pass through the body of growing-finishing pigs as they get older and/or heavier. Among the studied factors affecting TBI, wetness of the floor and current frequency appeared to be the most important.
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Citation: J.J. Matte, S. Robert, L. Godcharles, J. Bertin-Mahieux and G.-P. Marineau 1992. FACTORS AFFECTING THE ELECTRICAL IMPEDANCE OF GROWING-FINISHING PIGS. Canadian Agricultural Engineering 34(2):189-194.
Volume: 34
Issue: 1
Pages -
Contributor:
Date: 1992
Technical field:
Conference name:
Session name:
Other information:
Type: Text.Article
Format: PDF
Publication type:
Source:
Relation:
Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
DOI:
Description: In a firsttrial, 12 pigs between the ages of 9 and 22 weeks were used in a 2 x 2 factorial design to measurethe effect of 2 levels of 60 Hz ac voltage (2 and 5 V) and 2 flooring conditions (woven wire covered with water (WW) or dry (WD))on totalbodyimpedance (TBI).Whatever theageof the animal or the flooring conditions, theoverall TBI was higher (P<0.003) at2 Vthan at 5V(1300 vs 1091 ft). Theeffect of ageonTBIwasdependent upon the wetness of the floor (P< 0.01). At 10 weeksof age, TBI was higheron WD than onWW(3041 vs 1031 ft) while the correspondingdifference, at 18 weeks of age, was lesspronounced (1036vs 778ft). From18to 22 weeks, thedecrease ofTBIpersisted on both flooring conditionsbut wasmoremarked on WW(17%) than on WD (7%). This reduction in TBI with age could be explained by the increase of the contact area and of the pressure exerted by hooveson the floor, which are major factors influencing thequality of floor-hooves contact. In asecond trial, two15week-old pigs were used in a factorial arrangement of treatments (2 x 3 x4) to measure the effects of voltage (1 and 2 V), current frequency (60, 1000,3000 and 10,000 Hz) and flooring surfaces (WW, WD and a copper plate covered with water, (CW)) on TBI.Nodifference (P > 0.38) could be measured between the 1 V and the 2 V treatments. Whatever the voltage, the overall value of TBI at 60 Hz onCWwas lower (P < 0.01) than on WD but similar to that measured on WW. However, as current frequency increased, the differences among surfaces disappeared (P < 0.05). These results indicate that a greater amountof current could pass through the body of growing-finishing pigs as they get older and/or heavier. Among the studied factors affecting TBI, wetness of the floor and current frequency appeared to be the most important.
Keywords:
Résumé:
Mots-clés:
Citation: J.J. Matte, S. Robert, L. Godcharles, J. Bertin-Mahieux and G.-P. Marineau 1992. FACTORS AFFECTING THE ELECTRICAL IMPEDANCE OF GROWING-FINISHING PIGS. Canadian Agricultural Engineering 34(2):189-194.
Volume: 34
Issue: 1
Pages -
Contributor:
Date: 1992
Technical field:
Conference name:
Session name:
Other information:
Type: Text.Article
Format: PDF
Publication type:
Source:
Relation:
Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
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