with increased uptake of yolk-deriv

with increased uptake of yolk-derived water by the embryo.
Higher percentage YMat 19 d of incubation in small
eggs from very young breeders would compensate for
an increased relative rate of water loss and protect the
embryo from dehydration. An excess amount of moisture
inside the yolk during the last half of incubation, on the
other hand, has been found to have no effect on embryonic
growth (Thomas et al., 1988). Water is a metabolic byproduct
of lipid oxidation (Ar and Rahn, 1980), and increased
YL utilization may allow for increased availability
of metabolic water; however, embryo body fat and moisture
contents have been found to be negatively correlated
by the end of incubation (Peebles et al., 1999). Nevertheless,
rate of YL uptake and selective fatty acid oxidation
may permit embryos partial control of body moisture
levels.