Cargando…

Partitioning of heat production in growing pigs as a tool to improve the determination of efficiency of energy utilization

In growing pigs, the feed cost accounts for more than 60% of total production costs. The determination of efficiency of energy utilization through calorimetry measurements is of importance to sustain suitable feeding practice. The objective of this paper is to describe a methodology to correct daily...

Descripción completa

Detalles Bibliográficos
Autores principales: Labussière, Etienne, Dubois, Serge, van Milgen, Jaap, Noblet, Jean
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3685799/
https://www.ncbi.nlm.nih.gov/pubmed/23801965
http://dx.doi.org/10.3389/fphys.2013.00146
_version_ 1782273740335218688
author Labussière, Etienne
Dubois, Serge
van Milgen, Jaap
Noblet, Jean
author_facet Labussière, Etienne
Dubois, Serge
van Milgen, Jaap
Noblet, Jean
author_sort Labussière, Etienne
collection PubMed
description In growing pigs, the feed cost accounts for more than 60% of total production costs. The determination of efficiency of energy utilization through calorimetry measurements is of importance to sustain suitable feeding practice. The objective of this paper is to describe a methodology to correct daily heat production (HP) obtained from measurements in respiration chamber for the difference in energy expenditure related to physical activity between animals. The calculation is based on a preliminary published approach for partitioning HP between HP due to physical activity (AHP), thermic effect of feeding (TEF) and basal metabolic rate (fasting HP; FHP). Measurements with male growing pigs [mean body weight (BW): 115 kg] which were surgically castrated (SC), castrated through immunization against GnRH (IC), or kept as entire male (EM) were used as an example. Animals were fed the same diet ad-libitum and were housed individually in two 12-m(3) open-circuit respiration chambers during 6 days when fed ad-libitum and one supplementary day when fasted. Physical activity was recorded through interruption of an infrared beam to detect standing and lying positions and with force transducers that recorded the mechanical force the animal exerted on the floor of the cage. Corrected AHP (AHP(c)), TEF (TEF(c)), and HP (HP(c)) were calculated to standardize the level of AHP between animals, assuming that the ratio between AHP(c) and ME intake should be constant. Inefficiency of energy utilization (sum of AHP(c) and TEF(c)) was lower than the inefficiency estimated from the slope of the classical relationship between HP(c) and ME intake but was associated with higher requirements for maintenance. Results indicate that EM pigs had higher FHP but lower TEF(c) than IC and SC pigs. These results agree with the higher contents in viscera of EM pigs that stimulate their basal metabolic rate and with the reduced utilization of dietary protein to provide energy for maintenance energy requirements and fat deposition (FD).
format Online
Article
Text
id pubmed-3685799
institution National Center for Biotechnology Information
language English
publishDate 2013
publisher Frontiers Media S.A.
record_format MEDLINE/PubMed
spelling pubmed-36857992013-06-25 Partitioning of heat production in growing pigs as a tool to improve the determination of efficiency of energy utilization Labussière, Etienne Dubois, Serge van Milgen, Jaap Noblet, Jean Front Physiol Physiology In growing pigs, the feed cost accounts for more than 60% of total production costs. The determination of efficiency of energy utilization through calorimetry measurements is of importance to sustain suitable feeding practice. The objective of this paper is to describe a methodology to correct daily heat production (HP) obtained from measurements in respiration chamber for the difference in energy expenditure related to physical activity between animals. The calculation is based on a preliminary published approach for partitioning HP between HP due to physical activity (AHP), thermic effect of feeding (TEF) and basal metabolic rate (fasting HP; FHP). Measurements with male growing pigs [mean body weight (BW): 115 kg] which were surgically castrated (SC), castrated through immunization against GnRH (IC), or kept as entire male (EM) were used as an example. Animals were fed the same diet ad-libitum and were housed individually in two 12-m(3) open-circuit respiration chambers during 6 days when fed ad-libitum and one supplementary day when fasted. Physical activity was recorded through interruption of an infrared beam to detect standing and lying positions and with force transducers that recorded the mechanical force the animal exerted on the floor of the cage. Corrected AHP (AHP(c)), TEF (TEF(c)), and HP (HP(c)) were calculated to standardize the level of AHP between animals, assuming that the ratio between AHP(c) and ME intake should be constant. Inefficiency of energy utilization (sum of AHP(c) and TEF(c)) was lower than the inefficiency estimated from the slope of the classical relationship between HP(c) and ME intake but was associated with higher requirements for maintenance. Results indicate that EM pigs had higher FHP but lower TEF(c) than IC and SC pigs. These results agree with the higher contents in viscera of EM pigs that stimulate their basal metabolic rate and with the reduced utilization of dietary protein to provide energy for maintenance energy requirements and fat deposition (FD). Frontiers Media S.A. 2013-06-19 /pmc/articles/PMC3685799/ /pubmed/23801965 http://dx.doi.org/10.3389/fphys.2013.00146 Text en Copyright © 2013 Labussière, Dubois, van Milgen and Noblet. http://creativecommons.org/licenses/by/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc.
spellingShingle Physiology
Labussière, Etienne
Dubois, Serge
van Milgen, Jaap
Noblet, Jean
Partitioning of heat production in growing pigs as a tool to improve the determination of efficiency of energy utilization
title Partitioning of heat production in growing pigs as a tool to improve the determination of efficiency of energy utilization
title_full Partitioning of heat production in growing pigs as a tool to improve the determination of efficiency of energy utilization
title_fullStr Partitioning of heat production in growing pigs as a tool to improve the determination of efficiency of energy utilization
title_full_unstemmed Partitioning of heat production in growing pigs as a tool to improve the determination of efficiency of energy utilization
title_short Partitioning of heat production in growing pigs as a tool to improve the determination of efficiency of energy utilization
title_sort partitioning of heat production in growing pigs as a tool to improve the determination of efficiency of energy utilization
topic Physiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3685799/
https://www.ncbi.nlm.nih.gov/pubmed/23801965
http://dx.doi.org/10.3389/fphys.2013.00146
work_keys_str_mv AT labussiereetienne partitioningofheatproductioningrowingpigsasatooltoimprovethedeterminationofefficiencyofenergyutilization
AT duboisserge partitioningofheatproductioningrowingpigsasatooltoimprovethedeterminationofefficiencyofenergyutilization
AT vanmilgenjaap partitioningofheatproductioningrowingpigsasatooltoimprovethedeterminationofefficiencyofenergyutilization
AT nobletjean partitioningofheatproductioningrowingpigsasatooltoimprovethedeterminationofefficiencyofenergyutilization