The usefulness of a new TOBEC instrument [ACAN] for investigating body composition in small mammals

• Autorzy: Koteja P.
• Języki publikacji: EN

Abstrakty

EN

Estimates of water mass, lean body mass (LBM) and fat content based on total body electrical conductivity (TOBEC) measured with ACAN-2 were compared with direct measurements of carcass composition in two species of rodents: the laboratory mouse (n = 20) and the bank vole (n = 14). There was a strong linear relation between ACAN readings and lean mass or water mass. Body temperature did not affected the results, but the readings were dependent on the species and sex of the individuals. That could be due to differences in the body shape. The accuracy of predicting an average LBM or water mass was very high (1.5%), but the errors for predicting individual values were larger (8.5%). The predicted fat content values have identical confidence intervals as that for LBM. However, the relative error for the prediction of the amount of fat was higher, because the mass of fat was much smaller than LBM.

Słowa kluczowe

EN

non-invasive method; fat; measurement; energetics; total body electrical conductivity; small mammal; body composition; rodent

• Wydawca: -
• Czasopismo: Acta Theriologica
• Rocznik: 1996
• Tom: 41
• Numer: 1
• Opis fizyczny: p.107-112,fig.

Twórcy

autor

Koteja P.

• Jagiellonian University, Ingardena 6, 30-060 Krakow, Poland

Bibliografia

• Anonym 1991. EM-SCAN Inc. Model SA 2 Small research Animal Body Composition Analyzer. Operation Manual. Em-Scan Inc., Springfield, IL: 1-63.
• Castro G., Wunder B. A. and Knopf F. L. 1990. Total body electrical conductivity (TOBEC) to estimate total body fat of free-living birds. Condor 92: 496-499.
• Froncisz W., Piasecki W., Koteja P., Staliriski J. and Weiner J. 1994. A new instrument for non­-invasive measurement of total body water and fat content in small mammals. Polish Ecological Studies 20: 323-328.
• Morton J. M., Kirkpatrick R. L. and Smith E. P. 1991. Comments on estimating total body lipids from measurements of lean body mass. Condor 94: 463-465.
• Oklejewicz M and Koteja P. 1995. Energy and fat balance in laboratory mice: a study with a new TOBEC instrument. Abstracts of II European Congress of Mammalogy, 27.03-1.04.1995, Southampton, England: 76.
• Piasecki W., Koteja P., Froncisz W. and Weiner J. 1995. New way of body composition analysis using total body electrical conductivity method. Review of Scientific Instrument 66(4): 3037-3041.
• Roby D. D. 1991. A comparison of two noninvasive techniques to measure total body lipids in live birds. Auk 108: 509-518.
• Sawicka-Kapusta K. 1975. Fat extraction in the Soxhlet apparatus. [In: Methods for ecological bio- energetics. W. Grodzinski, R. Z. Klekowski and A. Duncan, eds]. Blackwell Scientific Publications, Oxford: 288-292.
• Scott I., Grant M. and Evans P. R. 1991. Estimation of fat-free mass of live birds: use of total body electrical conductivity (TOBEC) measurements in studies of single species in the field. Functional Ecology 5: 314-320.
• Sokal R. R. and Rohlf F. J. 1989. Biometrics. 2nd edition. Freeman, New York: 1-859.
• Walsberg G. E. 1988. Evaluation of a nondestructive method for determining fat scores in small birds and mammals. Physiological Zoology 61: 153-159.
• Wilkinson L. 1986. SYSTAT. The system for statistics. Systat Inc., Evanston, IL.