............................................................................................................................................. iv ACKNOWLEDGEMENTS ......................................................................................................................... vi TABLE OF CONTENTS ............................................................................................................................. vii LIST OF FIGURES ................................................................................................................................... viii LIST OF TABLES ....................................................................................................................................... x INTRODUCTION ...................................................................................................................................... 1 METHODS ............................................................................................................................................... 4 Field sampling ..................................................................................................................................... 4 Preparation of host and symbiont fractions ...................................................................................... 4 Lipid extraction ................................................................................................................................... 5 Lipid analysis ....................................................................................................................................... 7 Statistical analyses .............................................................................................................................. 7 RESULTS .................................................................................................................................................. 9 Fatty acid profiles of Symbiodinium muscatinei and Elliptochloris marina ........................................ 9 Fatty acid profiles of zooxanthellate, zoochlorellate, and aposymbiotic hosts ............................... 15 Fatty acid profiles of hosts and their algal symbiont ....................................................................... 20 DISCUSSION .......................................................................................................................................... 24 Fatty acid profiles of Symbiodinium muscatinei and Elliptochloris marina ...................................... 24 Fatty acid profiles of zooxanthellate, zoochlorellate, and aposymbiotic hosts ............................... 26 Fatty acid profiles of hosts and their algal symbiont ....................................................................... 29 Conclusions and future research directions ..................................................................................... 30 REFERENCES ......................................................................................................................................... 32Â