In vivo body composition estimation in nongravid and reproducing first-litter sows with deuterium oxide
An experiment was conducted with 64 first-litter sows to evaluate the efficacy of a D/sub 2/O dilution procedure for measuring in vivo body composition during the reproduction cycle. Eight gilts were each infused at breeding, 57 and 105 d postcoitum and at 5 and 25 d postpartum, with equivalent numbers of nongravid controls infused at corresponding periods except at 5 d postpartum. Results from D/sub 2/O dilution were compared with body water estimates obtained from chemical analysis. An early-equilibrating D/sub 2/O pool (before 15 min) was similar quantitatively to empty body (ingesta free) water in nongravid and lactating animals, but not in pregnant sows. Because of inconsistent D/sub 2/O equilibration patterns in gravid sows, the early pool was considered to have equilibrated with part but not all of the water in the conceptus products. Total body D/sub 2/O space measurement obtained from data following equilibration of D/sub 2/O in the entire body (1 to 2 h) overestimated total body water (including gastrointestinal water) by approximately 19%. Coefficients of determination for equations relating total body D/sub 2/O space to empty body and maternal body water were .96 and .88, respectively, in gestating sows and .67 and .74, respectively, for lactating sows, while coefficients of variation were below 6% in all cases. Prediction equations were developed to estimate empty and maternal body components (protein, fat and ash) from body weight and D/sub 2/O space. Accuracy of protein and ash weight prediction is lowest with this procedure because it involves the composite error of estimation of the other body components.
- Research Organization:
- Ohio Agricultural Research and Development Center, Wooster
- OSTI ID:
- 5836576
- Journal Information:
- J. Anim. Sci.; (United States), Vol. 59:5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BODY COMPOSITION
MEASURING METHODS
SWINE
ADIPOSE TISSUE
DEUTERIUM COMPOUNDS
IN VIVO
ISOTOPE DILUTION
LACTATION
PREGNANCY
PROTEINS
REPRODUCTION
WATER
WEIGHT
ANIMAL TISSUES
ANIMALS
BODY
CONNECTIVE TISSUE
DOMESTIC ANIMALS
HYDROGEN COMPOUNDS
ISOTOPE APPLICATIONS
MAMMALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
TISSUES
TRACER TECHNIQUES
VERTEBRATES
550201* - Biochemistry- Tracer Techniques