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1997 | 42 | 4 |
Tytuł artykułu

Validation of two new total body electrical conductivity (TOBEC) instruments for estimating body composition of live northern red-backed voles Clethrionomys rutilus

Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Total body electrical conductivity (TOBEC) is a method for non-destructively esti­mating body composition. We sought to monitor seasonal changes in total body fat in northern red-backed voles Clethrionomys rutilus (Pallas, 1779), a microtine (10-45 g). We validated two new TOBEC instruments: the SA-3000 by EM-SCAN Inc. and the ACAN-2 by Jagmar Inc. Both instruments explained 94% of the variation in lean body mass and total body water. However, accuracy of fat estimates generated from lean mass predictions was poor for both instruments (± > 100%). Two instrument-specific multiple regression models and a TOBEC-free multiple regression model were used to estimate total body fat. All three improved the ability to predict total body fat in C, rutilus. These two TOBEC instruments can not be used to measure changes in total body fat of individual C. rutilus due to the small amount of fat reserves and lack of seasonal variation.
Wydawca
-
Czasopismo
Rocznik
Tom
42
Numer
4
Opis fizyczny
p.387-397,fig.
Twórcy
  • University of Alaska, Fairbanks, AK 99775, USA
autor
autor
Bibliografia
  • Asch A. and Roby D. D. 1995. Some factors affecting precision of the total body electrical conductivity technique for measuring body composition in live birds. Wilson Bulletin 107: 306-316.
  • Bracco E. F., Yang M.„ Segal K., Hashim S. A. and Van Italie T. B. 1983. A new method for estimation of body composition in the live rat. Proceedings of the Society for Experimental Biology and Medicine 174: 143-146.
  • Castro G., Wunder B. A. and Fritz F. L. 1990. Total body electrical conductivity (TOBEC) to estimate total body fat of free-living birds. Condor 92: 496-499.
  • Dobush G. R., Ankney C. D. and Krementz D. G. 1985. The effect of apparatus, extraction time, and solvent type on lipid extractions of Snow Geese. Canadian Journal of Zoology 63: 1917-1920.
  • Froncisz W., Piasecki W., Koteja P., Stalinski J. and Weiner J. 1994. A new instrument for non­invasive measurement of total body water and fat content in small mammals. Polish Ecological Studies 20: 323-328.
  • Keim N. L., Mayclin P. L., Taylor S. J, and Brown D. L. 1988. Total-body electrical conductivity method for estimating body composition: validation by direct carcass analysis of pigs. American Journal of Clinical Nutrition 47: 180-185.
  • Koteja P. 1996. The usefulness of a new TOBEC instrument (ACAN) for investigating body com­position in small mammals. Acta Theriologica 41: 107-112,
  • Morton J. M., Kirkpatrick R. L. and Smith E. P. 1993. Comments on estimating total body lipids from measures of lean mass. Condor 93: 463-465.
  • Piasecki W., Koteja P., Weiner J. and Froncisz W. 1995. New way of body composition analysis using total body electrical conductivity method. Review of Scientific Instruments 66(4): 3037-3041.
  • Robbins C. T. 1983. Wildlife feeding and nutrition. Academic Press, New York: 1-352.
  • Roby D. D. 1991. A comparison of two noninvasive techniques to measure total body lipid in live birds. Auk 108: 509-518.
  • 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.
  • Skagen S. K., Knopf F. L, and Cade B. S. 1993. Estimation of lipids and lean mass of migrating sandpipers. Condor 95: 944-956.
  • Walsberg G. E. 1988. Evaluation of a nondestructive method for determining fat stores in small birds and mammals. Physiological Zoology 61: 153-159.
  • Zuercher G. L. 1995. Seasonal changes in body mass and composition of northern red-backed voles (Clethrionomys rutilus) in Interior Alaska. M Sc thesis, University of Alaska, Fairbanks: 1—127.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.agro-article-54fd939a-5661-4383-9c45-fce6f12c69e4
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