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Effects on ontogenesis of Carausius morosus hit by cosmic heavy ions.
- Source :
-
International Journal Of Radiation Applications And Instrumentation. Part D, Nuclear Tracks And Radiation Measurements [Int J Rad Appl Instrum D] 1990; Vol. 17 (2), pp. 145-53. - Publication Year :
- 1990
-
Abstract
- Among the biological problems that arise in long duration spaceflights, the effects of weightlessness and ionizing radiation appear to be the two main risk factors. Eggs of the stick insect Carausius morosus were exposed to spaceflight conditions during the 12.56 day Biosatellite mission Cosmos 1887. Five different ages were used, representing different sensitivities to radiation and different capacities for regeneration. During spaceflight the eggs continued their development. Already, in the Spacelab D1 mission in 1985, it has been shown that microgravity leads to a reduced hatching rate of eggs exposed during the early steps of development. When the eggs were hit by a heavy ion, a further but not significant reduction of the hatching rate was observed. Hatching was normal for eggs which were exposed on a 1 g reference centrifuge in space. Heavy ion hits caused body anomalies. The combined action of heavy ions and microgravity resulted in an unexpectedly high rate of anomalies. In the experiment on Cosmos 1887 these results were confirmed. Studies on the embryonic development before hatching showed no major difference between flight and ground control specimen, neither in speed of development nor in morphological anomalies. Hatching therefore seems to be the critical point in insect ontogenesis.
- Subjects :
- Animals
Collodion
Embryo, Nonmammalian embryology
Embryo, Nonmammalian radiation effects
Embryonic Development
Insecta embryology
Insecta growth & development
Larva radiation effects
Ovum growth & development
Ovum radiation effects
Polyethylene Glycols
Radiation Monitoring instrumentation
Radiometry
Abnormalities, Radiation-Induced
Cosmic Radiation
Heavy Ions
Insecta radiation effects
Space Flight
Weightlessness
Subjects
Details
- Language :
- English
- ISSN :
- 0735-245X
- Volume :
- 17
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- International Journal Of Radiation Applications And Instrumentation. Part D, Nuclear Tracks And Radiation Measurements
- Publication Type :
- Academic Journal
- Accession number :
- 11537514
- Full Text :
- https://doi.org/10.1016/1359-0189(90)90197-6