Predicting live and carcass lean using bioelectrical impedance technology in pigs

Marchello, M. J.; Berg, P. T.; Swantek, P. Matthew; Tilton, J. E.

doi:10.1016/s0301-6226(98)00199-7

Cited by 15 publications

(9 citation statements)

References 16 publications

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“…These imaginary parts had much lower correlations than the real parts. This is confirmed by other studies on lambs, pigs, and turkeys (Grimes et al, 1990;Berg and Marchello, 1994;Marchello et al, 1999).…”

Section: Correlations Between Impedance and Carcass Compositionsupporting

confidence: 88%

Prediction of lamb carcass composition by impedance spectroscopy

Altmann

Pliquett

Suess³

et al. 2004

Journal of Animal Science

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The objective of this study was to compare impedance spectroscopy with resistance measurements at a single frequency (50 kHz) for the prediction of lamb carcass composition. The impedance spectrum is usually recorded by measuring the complex impedance at various frequencies (frequency domain); however, in this study, we also applied the faster and simpler measurement in the time domain (application of a current step and measurement of the voltage response). The study was carried out on 24 male, German Black-headed Mutton lambs with an average BW of 45 kg. Frequency- and time domain-based impedance measurements were collected at 20 min and 24 h postmortem with different electrode placements. Real and imaginary parts at various frequencies were calculated from the locus diagram. Left sides were dissected into lean, fat, and bone, and right sides were ground to determine actual carcass composition. Crude fat, crude protein, and moisture were chemically analyzed on ground samples. Frequency- and time domain-based measurements did not provide the same absolute impedance values; however, the high correlations (P < 0.001) between these methods for the "real parts" showed that they ranked individuals in the same order. Most of the time domain data correlated higher to carcass composition than did the frequency domain data. The real parts of impedance showed correlations between -0.37 (P > 0.05) and -0.74 (P < 0.001) to water, crude fat, lean, and fatty tissue, whereas the relations to CP were much lower (from 0.00 to -0.47, P < 0.05). Electrode placements at different locations did not substantially improve the correlations with carcass composition. The "imaginary parts" of impedance were not suitable for the prediction of carcass composition. The highest accuracy (R2 = 0.66) was reached for the estimation of crude fat percentage by a regression equation with the time domain-based impedance measured at 24 h postmortem. Furthermore, there was not a clear superiority of measurements in a wide frequency range over a single frequency measurement at 50 kHz for the prediction of carcass composition. Even though we calculated the impedance at 50 kHz based on the locus diagram, which allowed for a high precision for predicting this impedance trait, single-frequency impedance devices typically used in practice cannot record the locus diagram and, therefore, exhibit a greater amount of uncertainty.

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Section: Correlations Between Impedance and Carcass Compositionsupporting

confidence: 88%

Prediction of lamb carcass composition by impedance spectroscopy

Altmann

Pliquett

Suess³

et al. 2004

Journal of Animal Science

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“…BIA is also an accurate predictor of body composition of animals (Marchello et al, 1999;Tierney et al, 2001) and fish (Bosworth and Wolters, 2001;Cox and Hartman, 2005;Duncan et al, 2007). Body composition factors such as total water, or proportion of fat tissue to lean tissue are correlated to BIA measurements through regression equations built on multiple measurements of control groups .…”

Section: Bia Use For Animals and Fish In Comparison To Humansmentioning

confidence: 99%

Application of bioelectrical impedance analysis as a method for estimating composition and metabolic condition of southern bluefin tuna (Thunnus maccoyii) during conventional tagging

Willis

Hobday

2008

Fisheries Research

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“…It is positively correlated to nutritional status in humans ( Barbosa-Silva et al 2003). BIA has recently been applied in ecology as an easy, accurate, nonlethal, and low-cost method to estimate animal condition and composition (Berg and Marchello 1994;Marchello et al 1999), with case studies on fish (Bosworth and Wolters 2001;Cox and Hartman 2005;Cox and Heintz 2009;Duncan et al 2007), including tunas (Willis and Hobday 2008). We performed BIA measurements on skipjack tuna with a Quantum II bioelectrical body composition analyser from RJL Systems (Clincton, Michigan, USA, http://www.rjlsystems.com), following the same technique used on the southern bluefin tuna (Thunnus maccoyii) (Willis and Hobday 2008) (see online Supplementary material for technical details 1 ).…”

Section: Bioelectrical Impedance Analysis (Bia)mentioning

confidence: 99%

Comparison of condition factors of skipjack tuna (Katsuwonus pelamis) associated or not with floating objects in an area known to be naturally enriched with logs

Robert

Dagorn

Bodin

et al. 2014

Can. J. Fish. Aquat. Sci.

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In an area that has barely been modified by fish aggregating devices (FADs) (e.g., the Mozambique Channel, known to be naturally enriched with logs, with few FADs), we found that the condition of skipjack tuna (Katsuwonus pelamis) associated with floating objects was lower than those in free-swimming schools. As this result was found in an area that mimics the environmental state prior to the use of FADs, it questions the interpretation of previous studies where such a difference has been interpreted to reflect the impact of extensive FAD deployment on tunas. It is possible that before the use of FADs, tunas associated with logs were also in poorer condition than tunas in free-swimming schools. Our results suggest that the evolutionary reason for which tunas associated with floating objects might not relate to short-term trophic benefit, and alternative hypotheses (e.g., the meeting point hypothesis) are discussed to explain this result.Résumé : Dans une région très peu modifiée par des dispositifs de concentration de poissons (DCP), le canal du Mozambique (naturellement riche en billes de bois, mais comptant peu de DCP), nous avons observé que l'embonpoint de listao (Katsuwonus pelamis) associées à des objets flottants était plus faible que celui de leurs congénères nageant en bancs libres. Puisque ce résultat porte sur une zone analogue au milieu naturel avant l'utilisation de DCP, il remet en question l'interprétation d'études antéri-eures voulant que cette différence reflète l'incidence d'un vaste déploiement de DCP sur les thonidés. Il est possible que, avant l'utilisation de DCP, les thons associées aux billes de bois présentaient également un moins bon embonpoint que les thons nageant en bancs libres. Nos résultats semblent indiquer que la raison évolutive pour laquelle les thonidés sont associées à des objets flottants ne serait peut-être pas être reliée à des avantages trophiques à court terme, et d'autres hypothèses (p. ex. l'hypothèse du point de rencontre) sont invoquées pour expliquer ces résultats. [Traduit par la Rédaction]

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Predicting live and carcass lean using bioelectrical impedance technology in pigs

Cited by 15 publications

References 16 publications

Prediction of lamb carcass composition by impedance spectroscopy

Prediction of lamb carcass composition by impedance spectroscopy

Application of bioelectrical impedance analysis as a method for estimating composition and metabolic condition of southern bluefin tuna (Thunnus maccoyii) during conventional tagging

Comparison of condition factors of skipjack tuna (Katsuwonus pelamis) associated or not with floating objects in an area known to be naturally enriched with logs

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