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Biol Bull 128: 493-496. (June 1965)
© 1965 Marine Biological Laboratory
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ON THE LIFE-HISTORY OF RHIZOSTOME MEDUSAE. III. ON THE EFFECTS OF TEMPERATURE ON THE STROBILATION OF MASTIGIAS PAPUA

YASUO SUGIURA 1

1 Misaki Senior High School, Miura-Shi, Kanagawa-Ken, Japan

1. In the habitat, the first appearance of the ephyrae coincides with the sea water temperature of about 22° C.

2. In the laboratory, the minimum effective range of temperature for induction of strobilation by giving zooxanthellae is found to be 20-22° C.

3. Individuals with zooxanthellae, which have once failed to react by strobilation by 20-22° C., can no longer be induced for strobilation by a further rise of temperature.

4. These individuals do react if they are cooled to 20° C. for about a month and then exposed to the higher temperature.






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Copyright © 1965 by the Marine Biological Laboratory.