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Biomedical subjects

N K Jacobsen

Publications and source records attributed to N K Jacobsen.

3 recordsLinked to original sources
PubMed1981

Plasma and blood volumes of maternally reared, captive black-tailed deer fawns.

Plasma and blood volumes determined by the indocyanine green and plasma-hematocrit methods increased curvilinearly as maternally reared black-tailed deer (5F, 5M) grew in body mass from 3.8 to 34.3 kg. Expressed on a weight-relative basis, however, the volumes of both sexes declined curvilinearly with growth. The volumes of blood and cell but not plasma were significantly larger in males than females. Although these fawns were comparable to young of other species of Cervidae in weight-specific blood volumes, they exceeded by 29% or more than 66 ml/kg body mass that characterizes adult mammals of other species.

Animals↗
PubMed1980

Increases in circulating volumes and cardiac size with growth of White-tailed deer (Odocoileus virginianus).

Plasma and blood volumes determined by the T-1824 plasma-hematocrit method increase curvilinearly as captive female and male white-tailed deer (Odocoileus virginianus) grow in body mass from 6 to 61 kg (N = 40) and 9 to 93 kg (N = 34), respectively. Although comparable to other species of Cervidae, the weight-specific blood volume averages 33% larger than the interspecific mammalian value of 66 ml/kg body mass. The heart of white-tailed deer is also large, averaging 0.90% of the body mass (N = 53), about twice the ratio reported for domesticated ungulates. The cardiovascular demands attendant with a tenfold increase of body mass are apparently met by rapid increases in cardiac size (both mass and left intraventricular volume increasing curvilinearly with growth) and minute volume of the cardiac pump (cardiac rate and volume ejected per beat, inversely related to the other), which maintain fewer circulations of blood volume per minute with growth to heavier body size occurring from June to November.

Animals↗