Vol. 45, No. 1 Supplementum, 2001 content next

INFLUENCE OF INCUBATION MODES ON MORPHOGENESIS OF JAPANESE QUAIL CHICKS

Gusev, O., Guryeva, T. S.*, Dadasheva, O. A.*, Pakhomov, A.*, Pirt, C.**

Zoology of Invertebrates, Dept.
Kazan State University
18, Kremlevskaya str.
420008, Kazan
Russia		 * State Scientific Centre - Institute of Biomedical Problems
Khoroshevskoye shosse 76A
Moscow 123007
Russia		 ** Aves Research Center
USA

Summary

The effect of microgravity on the morphogenesis of Japanese quails was evaluated by comparable analyses. It was found that the embryonic development of Japanese quail chicks under the conditions of weightlessness undergo a significant reduction of body weight and length. Zero gravity under conditions of space flight leads to shortening of legs in all the developmental stages. The wing length does not change.
By day 16 of embryogenesis under microgravity, the growth-rate of embryos is reduced in comparison with that under Earth conditions.
Results of the experiments showed that the morphometrical changes observed are connected with the development of embryos under conditions of microgravity. However, no effect of weightlessness on the pathological changes was found in the embryonic development of Japanese quail chicks. It has been confirmed that the gravity change has no to influence on the development of Japanese quail chicks, which had hatched from the eggs fertilized on Earth.

Key words: Japanese quail; microgravity; embryonic development; morphogenesis; body weight and length

References

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Folia Veterinaria / 2001