The Effects of X-Irradiation on the Metamorphosis and Budding of Aurelia aurita
Date of Award
Master of Science (MS)
Ocean & Earth Sciences
Ronald E. Johnson
Call Number for Print
Special Collections LD4331.O35P76
With the aid of the Aurelia Metamorphosis Test System, the acute or subtle morphological and behavioral effects of irradiation on the Norfolk Aurelia aurita were described and the sensitivity to X-irradiation of those organisms receiving thyroxine and those not receiving thyroxine was compared. Levels of radiation were 0 (control), 5,000, 10,000, 15,000, 20,000 and 40,000 rads. Morphology of the ephyrae, statolith and rhopalia numbers were recorded using the light microscope, Developmental abnormalities of the scyphistomae and ephyrae were recorded with the scanning electron microscope and light microscope. Two major findings from this investigation were the absence of rhopalia and statoliths at 15,000 and 20,000 rads and the development of two-bodied scyphistomae. There was a significantly higher frequency of monster scyphistomae in the group exposed to thyroxine prior to irradiation than in the group not exposed to thyroxine prior to irradiation.
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Prokopchak, Michael J..
"The Effects of X-Irradiation on the Metamorphosis and Budding of Aurelia aurita"
(1984). Master of Science (MS), Thesis, Ocean & Earth Sciences, Old Dominion University, DOI: 10.25777/cg9k-e311