Biol. Bull. Sign up for etocs!
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Biol Bull 159: 394-401. (October 1980)
© 1980 Marine Biological Laboratory
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by RAHAT, M.
Right arrow Articles by ADAR, O.
Right arrow Search for Related Content
PubMed
Right arrow Articles by RAHAT, M.
Right arrow Articles by ADAR, O.

EFFECT OF SYMBIOTIC ZOOXANTHELLAE AND TEMPERATURE ON BUDDING AND STROBILATION IN CASSIOPEIA ANDROMEDA (ESCHSCHOLZ)

M. RAHAT 1 and ORIT ADAR 1

1 Department of Zoology, The Hebrew University, Jerusalem, Israel

The role of the zooxanthellae in the life cycle of Cassiopeia andromeda was reexamined. Symbiotic and aposymbiotic polyps were maintained at various temperatures between 17° and 30°C, and numbers of buds and ephyrae formed at each temperature were recorded.

The number of buds formed by the symbiotic polyps was inversely related to temperature. After 20 days at above 20°C, only ephyrae were formed.

In aposymbiotic polyps, buds were formed at all temperatures tested. Strobilation occurred above 25°C, and aposymbiotic ephyrae were obtained. Aposymbiotic polyps reinfected with zooxanthellae formed ephyrae at 22°C. A similar effect was obtained by repeatedly injecting aposymbiotic polyps with heat- or cold-inactivated homogenate derived from adult medusae. No reinfection occurred in the latter.

It is concluded: 1. At higher metabolic rates, strobilation supersedes budding in C. andromeda 2. A higher metabolic rate is obtained at elevated temperatures, and by a biotrophic effect of the symbiotic zooxanthellae. 3. Symbiotic zooxanthellae are not essential for strobilation in C. andromeda.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1980 by the Marine Biological Laboratory.