Description and function of a mobile open-circuit respirometry system to measure gas exchange in small ruminants

Fernández, Carlos; López, M. C.; Lachica, M.

doi:10.1016/j.anifeedsci.2012.01.006

Cited by 32 publications

(35 citation statements)

References 8 publications

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“…In this study, we used open‐circuit facemask respirometry, which is based on indirect calorimetry method and assists in measuring the gas exchange associated with the oxidation of energy substrates to estimate HP. It is a reliable, cost efficient and sufficiently accurate method (Fernandez et al., ); however, the gas exchange measurements are performed in short periods. Conversely, open‐circuit respirometry using respiration chambers enables longer and continuous measurements of gas exchange, where FHP is assumed to be the asymptote of HP after a period of fasting (van Milgen et al., ) and methane decline would possibly be acquired continuously.…”

Section: Resultsmentioning

confidence: 99%

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Fasting heat production of Saanen and Anglo Nubian goats measured using open‐circuit facemask respirometry

Fernandes

Lima

Almeida

et al. 2016

Animal Physiology Nutrition

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This study aimed to establish the heat production (HP) of Saanen and Anglo Nubian goats at absorptive (feeding) and at post-absorptive (fasting) statuses to determine the adequate period of fasting required for the measurement of basal metabolism. Gas exchange was recorded via open-circuit facemask respirometry. Six non-lactating and non-pregnant goats of each breed, Saanen (49.2 ± 3.2 kg of body weight, BW) and Anglo Nubian (64.0 ± 3.0 kg BW), were placed in individual pens with ad libitum access to the same total mixed ration. After a 3-day feeding period, the animals were subjected to fasting (no feed), and the gas exchange measurement was performed for 30 min at 0, 12, 20, 36, 44, 60 and 68 h after fasting. The daily HP of the Saanen and Anglo Nubian goats averaged 557.4 ± 38.7 and 357.1 ± 35.3 kJ/kg BW day respectively. During fasting, the methane production decreased exponentially in both breeds, and the critical time when methane production was statistically equal to zero was at 31 h of fasting for the Saanen goats and at 40 h for the Anglo Nubian goats. The daily HP and respiratory exchange rate during fasting decreased up to 60 h. Taken together, our results suggest that the ideal period to measure fasting heat production (FHP) for goats fed at maintenance levels should be between 40 h and 60 h of fasting. Consequently, the daily FHP, after 60 h of fasting, of Saanen and Anglo Nubian goats was 183.3 ± 16.3 and 211.1 ± 11.5 kJ/kg BW day respectively. The results presented herein are relevant for future studies of energy metabolism in goats.

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Section: Resultsmentioning

confidence: 99%

“…Fernandez et al. () showed that changing facial masks to an open circuit could be a reliable, cost‐efficient and sufficiently accurate system for measuring gas exchange in both fed and fasted small ruminants.…”

Section: Introductionmentioning

confidence: 99%

Fasting heat production of Saanen and Anglo Nubian goats measured using open‐circuit facemask respirometry

Fernandes

Lima

Almeida

et al. 2016

Animal Physiology Nutrition

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“…The face mask technique has the advantages including easily handling, low cost and monitoring cattle close to actual feeding management. Hence, the face mask technique was used in many trials for measuring gas exchange of animals (Brosh, ; Fernández et al., ). It should be noted that the face mask technique suffers from disadvantages including elimination of eating and drinking during measurement (Johnson and Johnson, ), short period of sampling and possibly underestimating CH 4 with an average of 9% compared with respiratory chambers (Liang et al., ).…”

Section: Discussionmentioning

confidence: 99%

Effects of supplementing rare earth element cerium on rumen fermentation, nutrient digestibility, nitrogen balance and plasma biochemical parameters in beef cattle

Lin

Chen

Zhao

et al. 2015

Animal Physiology Nutrition

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The objectives of the trial were to investigate the effects of supplementing rare earth element (REE) cerium (Ce) on rumen fermentation, nutrient digestibility, methane (CH4 ) production, nitrogen (N) balance and plasma biochemical parameters in beef cattle. Four Simmental male cattle, aged at 14 months, with initial liveweight of 355 ± 8 kg and fitted with permanent rumen cannulas, were used as experimental animals. The cattle were fed with a total mixed ration (TMR) composed of concentrate mixture and corn silage. Four levels of cerium chloride (CeCl3 ·7H2 O, purity 99.9%), that is 0, 80, 160 and 240 mg CeCl3 /kg DM, were added to basal ration in a 4 × 4 Latin square design. Each experimental period lasted 15 days, of which the first 12 days were for pre-treatment and the last 3 days were for sampling. The results showed that supplementing CeCl3 at 160 or 240 mg/kg DM increased neutral detergent fibre (NDF) digestibility (p < 0.05) and tended to increased acid detergent fibre (ADF) digestibility (p = 0.083). Supplementing CeCl3 at 80, 160 or 240 mg/kg DM decreased the molar ratio of rumen acetate to propionate linearly (p < 0.05). Supplementing CeCl3 at 160 or 240 mg/kg DM decreased total N excretion, urinary N excretion and increased N retention (p < 0.05), increased excretion of total urinary purine derivatives (PD) (p < 0.05) and decreased CH4 /kg DMI (p < 0.05). In conclusion, supplementing CeCl3 at 160 or 240 mg/kg DM in the ration of beef cattle increased the digestibility of NDF, decreased the molar ratio of rumen acetate to propionate, increased N retention and microbial N flow and decreased CH4 /kg DMI.

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“…Although the unit was an autocalibrated model, the analysers were calibrated with reference gases before each test. Fernández et al (2012Fernández et al ( , 2015 described the mobile open-circuit respirometry system used for these measurements. The whole system was calibrated by injecting pure N 2 into the head box (McLean and Tobin, 1987) and determined gravimetrically using a precision scale.…”

Section: Experimental Schedule and Measurementsmentioning

confidence: 99%

Replacement of alfalfa hay ( Medicago sativa ) with maralfalfa hay ( Pennisetum sp.) in diets of lactating dairy goats

Criscioni

Martí

Pérez-Baena

et al. 2016

Animal Feed Science and Technology

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Description and function of a mobile open-circuit respirometry system to measure gas exchange in small ruminants

Cited by 32 publications

References 8 publications

Fasting heat production of Saanen and Anglo Nubian goats measured using open‐circuit facemask respirometry

Fasting heat production of Saanen and Anglo Nubian goats measured using open‐circuit facemask respirometry

Effects of supplementing rare earth element cerium on rumen fermentation, nutrient digestibility, nitrogen balance and plasma biochemical parameters in beef cattle

Replacement of alfalfa hay ( Medicago sativa ) with maralfalfa hay ( Pennisetum sp.) in diets of lactating dairy goats

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