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Titolo:
ESTIMATION OF TOTAL-BODY WATER IN HARBOR SEALS - HOW USEFUL IS BIOELECTRICAL-IMPEDANCE ANALYSIS
Autore:
BOWEN WD; BONESS DJ; IVERSON SJ;
Indirizzi:
FISHERIES & OCEANS CANADA,BEDFORD INST OCEANOG,MARINE FISH DIV,POB 1006 DARTMOUTH NS B2Y 4A2 CANADA SMITHSONIAN INST,NATL ZOOL PK,DEPT ZOOL RES WASHINGTON DC 20008 DALHOUSIE UNIV,DEPT BIOL HALIFAX NS B3H 3J5 CANADA
Titolo Testata:
Marine mammal science
fascicolo: 4, volume: 14, anno: 1998,
pagine: 765 - 777
SICI:
0824-0469(1998)14:4<765:EOTWIH>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANTARCTIC FUR SEALS; NORTHERN ELEPHANT SEAL; FAT-FREE MASS; ARCTOCEPHALUS-GAZELLA; MIROUNGA-ANGUSTIROSTRIS; NUTRIENT DEPOSITION; HALICHOERUS-GRYPUS; ISOTOPE-DILUTION; ENERGY-TRANSFER; PHOCA-VITULINA;
Keywords:
BIOELECTRICAL IMPEDANCE; TOTAL BODY WATER; DEUTERIUM; HARBOR SEAL; PHOCA VITULINA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
31
Recensione:
Indirizzi per estratti:
Citazione:
W.D. Bowen et al., "ESTIMATION OF TOTAL-BODY WATER IN HARBOR SEALS - HOW USEFUL IS BIOELECTRICAL-IMPEDANCE ANALYSIS", Marine mammal science, 14(4), 1998, pp. 765-777

Abstract

We evaluated bioelectrical impedance analysis (BIA) as a means of rapidly and inexpensively estimating total body water (TBW) of harbor seals (Phoca vitulina). Deuterium oxide dilution was used to estimate TBWin 17 adult females and 16 of their pups between birth and late lactation. Isotope dilution was also used to determine TBW in 12 adult males early and 10 of these males late in the breeding season. At the sametime, resistance (Rs) and reactance (Xc) measurements were taken using a tetrapolar, impedance plethysmograph (Model 101A, RJL Systems). Seals were sedated with diazepam prior to taking BIA measurements. Within-day duplicate Rs measurements on pups and adults, taken 2-240 min apart, differed by an average of 3.0% +/- 1.4% (n = 42, CV = 102%). Movement of the seal during BIA measurements caused variability in both Rsand Xc values. BIA measurements were generally poor predictors of TBW. Rs was significantly correlated with TBW in pups only (Rs = 0.93, P = 0.001, n = 11). Bioelectrical conductor volume (length2/Rs) was significantly correlated with TBW only in adult females (Rs = 0.63, P = 0.02, n = 14). We conclude that BIA is not a reliable method of estimating TBW in wild harbor seals.

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Documento generato il 23/09/20 alle ore 06:08:51