The relationship between heart rate and energy expenditure in Alpine, Angora, Boer and Spanish goat wethers consuming different quality diets at level of intake near maintenance or fasting

Puchała, R.; Tovar-Luna, I.; Goetsch, A.L.; Sahlu, T.; Carstens, G. E.; Freetly, H. C.

doi:10.1016/j.smallrumres.2006.03.002

Cited by 39 publications

(27 citation statements)

References 20 publications

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“…Findings of Puchala et al (2007) with yearling wether goats did not indicate appreciable effect on EE:HR of low feed intake during the measurement period relative to greater intake when on pasture. EE:HR ranked (P<0.05) period 5 < 1 and 2 < 4 < 3.…”

Section: Resultsmentioning

confidence: 65%

Effects of Stocking Rate, Breed and Stage of Production on Energy Expenditure and Activity of Meat Goat Does on Pasture

Beker

Gipson

Puchała

et al. 2009

Journal of Applied Animal Research

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Section: Resultsmentioning

confidence: 65%

Effects of Stocking Rate, Breed and Stage of Production on Energy Expenditure and Activity of Meat Goat Does on Pasture

Beker

Gipson

Puchała

et al. 2009

Journal of Applied Animal Research

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“…The procedure of monitoring HR was described by Puchala et al (2007Puchala et al ( , 2009. In brief, wethers were fitted with 5 × 5 cm electrodes prepared from stretch conductive fabric (Less EMF, Albany, NY, USA), glued to Vermed PerformancePlus ECG electrodes (Bellow Falls, VT, USA) and attached to the chest just behind and slightly below the left elbow and behind the shoulder blade on the right side.…”

Section: Methodsmentioning

confidence: 99%

“…During the adaptation period, the ratio of heat energy (HE) to heart rate (HR) (HE:HR) was determined as described by Puchala et al (2007Puchala et al ( , 2009. The same diet used in the experiment was fed.…”

Section: Animals and Treatmentsmentioning

confidence: 99%

Effects of the number of animals per automated feeder and length and time of access on feed intake, growth performance, and behavior of yearling Boer goat wethers

Tsukahara

Gipson

Puchała

et al. 2014

Small Ruminant Research

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“…They concluded that measuring O 2 P more than once on the same day could decrease this error by a factor of the square root of the number of measurements. Puchala et al (2006) used a hood system to measure the HR and VO 2 of goats under maintenance conditions continuously throughout the day and averaged the data over 1-h measurement periods. The HR of the animals ranged from 52 to 78 beats/min, but the maximum deviation of the O 2 P from its average value was less than 5%.…”

Section: Variations In O 2 P and Their Relation To Hr Levelmentioning

confidence: 99%

Heart rate measurements as an index of energy expenditure and energy balance in ruminants: A review1

Brosh

2007

Journal of Animal Science

131

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A major part of the ME consumed by ruminants (MEI) is dissipated as heat. This fraction, called heat production or energy expenditure (EE), is assayed largely by measuring O2 consumption (VO2). Conventional measurement of EE in controlled conditions in chambers does not reflect the complexity of natural, environmental, and social conditions of free-ranging animals. In mammals, most of the measured VO2 is transferred to the tissues through the heart; therefore, regression of heart rate (HR) against VO2 can be used to estimate the EE of free-ranging animals. The present article reviews the current knowledge on the use of HR for estimating EE. Energy expenditure can be determined from HR measurements, recorded daily over the course of several days, multiplied by the VO2 per beat. When an animal does not perform significant exercise, a constant value of VO2 per beat [O2 pulse (O2P)] measured over a short period (10 to 15 min) is used; during exercise, O2P increases, and the regression equation of VO2 against HR is used. Under extreme heat load, HR increases to improve heat dissipation, and O2P decreases; therefore, the effect of heat load on O2P needs to be taken into account. Cold stress that doubles heat production does not affect O2P. Heart rate and EE are highly correlated with MEI, but there is significant individual variation in the relationship; therefore, the daily change in the HR of individual animals can be used as an indicator of changes in the individual energy status of a ruminant, and the average HR of the group can serve in the estimation of the energy status of the group. When O2P is measured, the average group EE is an indication of the energy balance of the whole group. Because the MEI of nondraft animals is the sum of EE and retained energy (RE), the MEI of free-ranging ruminants can be determined by measurement of EE by the HR method and adding the RE. Similarly, the RE can be determined without slaughtering the animals from measurements of EE and MEI. Soon when devices for automatic HR monitoring of domestic ruminants become available at a reasonable price, continuous monitoring of HR might provide producers with a sensitive tool for identifying changes in the energy status of their animals. This will also significantly help to shorten the time needed to identify health problems of individual animals.

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The relationship between heart rate and energy expenditure in Alpine, Angora, Boer and Spanish goat wethers consuming different quality diets at level of intake near maintenance or fasting

Cited by 39 publications

References 20 publications

Effects of Stocking Rate, Breed and Stage of Production on Energy Expenditure and Activity of Meat Goat Does on Pasture

Effects of Stocking Rate, Breed and Stage of Production on Energy Expenditure and Activity of Meat Goat Does on Pasture

Effects of the number of animals per automated feeder and length and time of access on feed intake, growth performance, and behavior of yearling Boer goat wethers

Heart rate measurements as an index of energy expenditure and energy balance in ruminants: A review1

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