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READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



MP 8-75 



2. GOVT ACCESSION NO, 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and Subtitle) 



EFFECTS OF ENGINEERING ACTIVITIES ON 

 THE ECOLOGY OF PISMO CLAMS 



5. TYPE OF REPORT & PERIOD COVERED 



Miscellaneous Paper 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfs; 



James Nybakken 

 Mark Stephenson 



8. CONTRACT OR GRANT NUMBERfeJ 



DACW72-72-C-0016 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Moss Landing Marine Laboratories- 

 Moss Landing, California 95039 



V04230 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CERRE-EC) 



Kingman Building, Fort Belvoir, VA 22060 



12. REPORT DATE 



September 1975 



'3. NUMBER OF PAGES 

 65 



14. MONITORING AGENCY NAME ft ADDRESSfJf d/«oren( from Controlling Ollice) 



IS. SECURITY CLASS, (ol this report) 



UNCLASSIFIED 



16. DISTRIBUTION STATEMENT (ol this Report) 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (ol the abstract ■ 



ed in Block 20, It dlflerent bom Report) 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Co 



Pismo Clams 

 Ecology 



ssary and Identity by block number) 



Monterey Bay, California 



20. ABSTRACT (Continue on reverse aide It neceamary and Identity by block number) 



Three aspects of the ecology of Pismo clams (Tivela stultovum) were 

 investigated in Monterey Bay, California: distribution, reproduction cycle, 

 and age and growth. 



Pismo clam populations were found to be restricted to bay areas between 

 the Salinas River and Santa Cruz. Highest densities recorded were intertidal, 

 and subtidal clam beds were few and with low densities. Most clams appeared 



DD ,^5 



EDtTlOH OF t NOV 65 rS OBSOLETE 



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