SYMBIOTIC RELATIONSHIPS OF THE SPHAERIID CLAM MUSCULIUM TRANSVERSUM Item Type text; Dissertation-Reproduction (electronic) Authors D'Eliscu, Peter Neal, 1946- Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 03/10/2021 21:24:18 Link to Item http://hdl.handle.net/10150/288215 INFORMATION TO USERS This material was produced from a microfilm copy of the original document. While the most advanced technological means to photograph and reproduce this document have been used, the quality is heavily dependent upon the quality of the original submitted. 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The University o£ Arizona, Ph.D., 1974 Zoology University Microfilms, A XEROX Company, Ann Arbor, Michigan © 1974 PETER NEAL D'ELISCU ALL RIGHTS RESERVED THIS DISSERTATION HAS BEEN MICROFILMED EXACTLY AS RECEIVED. SYMBIOTIC RELATIONSHIPS OF THE SPHAERIID CLAM MUSCULIUM TRANSVERSUM by Peter Neal D'Eliscu A Dissertation Submitted to the Faculty of the DEPARTMENT OF BIOLOGICAL SCIENCES WITH A MAJOR IN BIOLOGY In Partial Fulfillment cf the Requirements For the Degree of DOCTOR OF PHILOSOPHY In the Graduate College THE UNIVERSITY OF ARIZONA 19 7 4 THE UNIVERSITY OF ARIZONA GRADUATE COLLEGE I hereby recommend that this dissertation prepared under my direction by Peter Neal D'Eliscu entitled SYMBIOTIC RELATIONSHIPS OF THE SPHAERHD CLAM MUSCULIUM TRANSVERSUM be accepted as fulfilling the dissertation requirement of the degree of DOCTOR OF PHILOSOPHY Zlx- W / /' /C/V/ Dissertation Director Date After inspection of the final copy of the dissertation, the follot/ing members of the Final Examination Committee concur in its approval and recommend its acceptance:- c Co/,,r CZflyJ /. /W f/wrvi fP•. C—^ | IS ? =5- (i-M-rrfr—, I „ , 1 ' J., rr/iJ/ . t<f 7H This approval and acceptance is contingent on the candidate's adequate performance and defense of this dissertation at the final oral examination. The inclusion of this sheet bound into the library copy of the dissertation is evidence of satisfactory performance at the final examination. STATEMENT BY AUTHOR This dissertation has been submitted in partial fulfillment of requirements for an advanced degree at The University of Arizona and is deposited in the University Library to be made available to borrowers under rules of the Library. Brief quotations from this dissertation are allowable without special permission, provided that accurate acknowledgment of source is made. Requests for permission for extended quotation from or reproduction of this manuscript in whole or in part may be granted by the copyright holder. SIGNED: ACKNOWLEDGMENTS I wish to thank Dr. Albert R. Mead, major professor and dissertation advisor, for his leadership and friendship throughout these studies. His great enthusiasm for the study of symbiotic relationships, and the practical and theoretical aspects of human parasitology have inspired my continued interests in these areas. I also wish to thank Dr. Walter B. Miller, Dr. Peter E. Pickens, Dr. Elizabeth A. Stull, and Dr. H. Ronald Pulliam for their guidance, enthusiasm, and constructive criticism during the research and manuscript preparation phases of these studies. I am indebted to Dr. Joseph C. Bequaert for his help and suggestions concerning the Sciomyzidae, the molluscan fauna of Arizona and Texas, and the taxonomy of Musculium. I wish to thank Dr. Roy S. Houston for his unselfish efforts in teaching me his sectioning and staining methods for invertebrate tissues, and his constructive discussions of invertebrate symbioses. Grateful thanks are given to Mr. Richard L. Reeder, Mr. Carl C. Christensen, Mr. Richard H. Russell, and Mr. David B. Richman for their constructive conversations and help during field studies. Special thanks are due Mr. William N. Palmer, who went through great depths and cold feet during field collections in Texas. iv V I am grateful to Dr. Robert Lee Gilbertson for his suggestions concerning Endosphaerium. and to Mr. Fred Noon for the unreserved use of the ponds and impoundments on his ranch. I also wish to thank Dr. Roman Kenk for his help during field studies of sphaeriids near Lake Tahoe, California, and Dr. Vida C. Kenk for suggesting the possibilities of pelecypod-symbiont research. Miss Margret Magerle is due thanks for developing several of the photographs used in these studies. Finally, I wish to celebrate the understanding of my wife Judy, who tolerated my tendencies to return home wet, muddy, and hungry after searching distant creeks for clams, consume too little or too much California Pinot Noir, and moodily clam-up when studying. TABLE OF CONTENTS Page LIST OF ILLUSTRATIONS viii LIST OF TABLES ix ABSTRACT x INTRODUCTION 1 METHODS AND MATERIALS 6 Serial Sectioning 11 Autoradiographic Methods 12 Parallel Water Flow Tubes 14 SYMBIOTIC RELATIONSHIPS 17 Introduction 17 Symbionts of Musculium Transversum 22 Rotifera 22 Coleoptera 25 Oligochaeta 29 Nematoda 33 Endosphaerium funiculata 36 Bryozoa (Ectoprocta) 43 C11 x a ta ..................a 43 Summary of Symbiotic Associations 45 AESTIVATION 48 Introduction . 48 Aestivation of Musculium transversum 51 Symbiont Aestivation 58 PREDATION 63 Leech Predation on Musculium transversum 64 DISPERSAL 68 SUMMARY 71 vi vii TABLE OF CONTENTS—Continued Page APPENDIX A. STAINING METHODS FOR SEVERAL SECTIONS OF MUSCULIUM TRANSVERSUM ... 73 APPENDIX B. SOME TREMATODA REPORTED FROM FRESHWATER BIVALVES 74 APPENDIX C. ARGENTAFFIN URIC ACID STAINING METHOD 79 APPENDIX D. PARALLEL WATER FLOW TUBE CHOICES OF BEROSUS, AEOLOSOMA. CHAETOGASTER. AND SEINURA 80 LIST OF REFERENCES 81 LIST OF ILLUSTRATIONS Figure Page " 1. The Sphaeriid Clam Musculium transversum .... 3 2. Temperatures and pH of the Noon Pond October 1971 to September 1972 7 3. Schematic Diagram of Parallel Water Flow Tube System 15 4. The Rotifer Filinia sp., Showing Cuticular Setae; x 640 ...' 24 Berosus sp., Showing Lateral Tracheal Gills, 2 mm 26 6. Aeolosoma sp., 3, mm 30 7. Chaetogaster limnaei. Showing Ventral Setae, x 100 31 8. Seinura sp.. Showing Anterior Stylet, x 200 34 9. Endosphaerium funiculata. Showing Thallus and Hyphal Anchor (arrow) 37 10. Plumatella sp., Sessoblast 44 viii LIST OF TABLES Table Page 1. Autoradiographic Results for Musculium Symbionts 23 2. Some Partial Food Chains of Symbionts of Musculium 46 3. Parallel Water Flow Tube Choices of Glossiphonia 67 ix ABSTRACT The organisms associated with the sphaeriid clam Musculium transversum exist in several symbiotic levels. 14 Serial sectioning, differential staining, and C - autoradiography have shown various taxonomic groups living in phoretic, commensalistic, mutualistic, and parasitic relationships with this host clam. The phoretic bryozoan Plumatella deposits resting sessoblasts on the shell of the host. The spinose rotifer Fjlinia lives in the mantle cavity as a commensal. The endosymbiotic beetle Berosus is predaceous on the commensal coprozoic oligochaetes Aeolosoma and Chaetogaster. Rotifers and the parasitic nematode Seinura are captured by the predaceous fungus Endosphaerium funiculata. which lives attached to the gills of the host. Endosphaerium is therefore mutualistic, con­ ferring on its host some resistance to a destructive parasite. The reproductive development of the fungus is closely coordinated with that of its molluscan host. Aestivating clams show several physiological adaptations for water conservation, including the production of uric acid crystals instead of ammonia, and the secretion of hygroscopic mucous threads