|SREL Reprint #0348|
of Temperature, Radiation and Sex on Body Composition in Peromyscus
D. Scarth, C. O. Leverett, L. L. Scarth, M. H. Smith, and J. L. Carmon
Cumulative effects of temperature (16C and 24C),
radiation of males in seven prior generations and sex on % ether extract, %
protein, % water and % ash of whole body weight were studied in 84 mice (Peromyscus
polionotus). One week prior
to mating males were irradiated with either 0 R, 100 R, or 200 R gamma
radiation. Heavier mice tended to
have higher % ether extract and lower % H2O than lighter mice.
Per cent ash was not significantly related to other measurements of
composition or to live weight. The
100 R line had a higher % H2O than the other two radiation lines and higher %
protein than the 0 R line. The
radiation effect on % H2O was not consistent in the two temperatures.
Mice sired by makes treated with 200 R had lower % H2O at 16C than at
24C; whereas, the opposite was true for the other two radiation levels.
Mice in the 200 R line had higher % either extract than in the 100 R
line. Radiation tended to increase
% protein compared to O R. Males
were fatter than females. Mice from
the 16C lines had lower % ether extract and higher % protein and % H2O than mice
from the 24C lines. However, on a
fat free basis, % protein and % H2O were not significantly different for the two
temperature groups. Per cent ash in
24C mice was more than 1.5 times the % ash found in 16C mice.
SREL Reprint #0348
Scarth, R.D., C.O. Leverett, L.L. Scarth, M.H. Smith,
and J.L. Carmon. 1973. Effects of temperature, radiation and
sex on body composition in Peromyscus polionotus. Growth