Turtles; gravity; centrifugation; ear; growth; labyrinthectomy
A 1-G space-based centrifuge will be necessary before controlled, bio-medical weightlessness experiments can be performed. Some argue that centrifuges of prohibitive dimensions are necessary. Labyrinthectomized, hatchling, Red-Eared Turtles (Pseudemys scripta elegans) which had grown to a length of 45 mm at 5 G's (200 rpm 10 cm radius) displayed the same greater shell height (21.7 ± 0.4 vs, 20.0 ± 0.3 mm at 1 G) that was observed at 5 G's with nonlabyrinthectomized, centrifuged turtles. If other effects of centrifugation can also be attributed to artificial gravity rather than rotation, a space-based centrifuge radius as short as 10 cm (1 G at 100 rpm) is suggested.
Proceedings of the Iowa Academy of Science
© Copyright 1972 by the Iowa Academy of Science, Inc.
Rice, John O.; Wunder, Charles C.; Diecke, Friedrich C.; Clark, Mary M.; Kesterson, Randall K.; White, Jackquelyn G.; and Whiteside, Kathy M.
"Chronic Centrifugation of Labyrinthectomized, Growing Turtles,"
Proceedings of the Iowa Academy of Science: Vol. 78:
, Article 10.
Available at: http://scholarworks.uni.edu/pias/vol78/iss3/10