Oa. Dadasheva et Yy. Shepelev, ANALYSIS OF ANOMALIES OF QUAIL EMBRYONIC-DEVELOPMENT IN EGG DURING INCUBATION IN THE CONDITIONS OF SPACE-FLIGHT, ACT VET B, 65(1), 1996, pp. 39-41
Three cycles of quail egg incubation were performed in the conditions
of spaceflight in incubators of Slovak provenience. In these experimen
ts, 22 embryos were obtained at different stages of development with a
variety of anomalies. Frequency of these anomalies exceeded considera
bly that of terrestrial controls. Analysis of this unique material rev
ealed that the majority of them were defects of the primary nerve stru
ctures of the brain and eye as a derivative brain rudiment. Such anoma
lies accounted for 65%, while the remaining 35% were anomalies of ecto
derm and mesoderm derivatives. It is assumed that the main reasons for
this high frequency of anomalies of avian embryogenesis under conditi
ons of space flight are both vibrations and overloads during transfer
of the spaceship to orbit. These factors cause changes in the position
of the embryo within the egg related to its components such as the ai
r chamber, yolk and albumen. Mechanic displacements of the embryo duri
ng launch are then further reinforced by the effects of weightlessness
.