UNCLASSIFIED 



Security Classification 



DOCUMENT CONTROL DATA - R&D 



body ot abstract and indexing annotation must be entered when the 



all report is classified) 



1 ORIGINATIN G ACTIVITY (Corporate author) 



U. S. Navy Electronics Laboratory 

 San Diego, California 92152 



UNCLASSIFIED 



3 REPORT TITLE 



PHYSIOLOGICAL DYNAMICS OF SIPHONOPHORES FROM DEEP 

 SCATTERING LAYERS 



4 DESCRIPTIVE NOTES (Type ot report and inclusive dales) 



Research and Development Report 



November 1964 - August 1965 



S AUTHORfS; (La 



G. V. Pickwell 



6 REPO RT DATE 



20 April 1966 



50 



22 



= ROJECTNO. g R Q11 Q1 Qlj Tagk 0401 



(NEL Z12051) 



1369 



3HT NOfS; (Any other numbers that may be assigned 



10. AVAILABILITY/LIMITATION NOTICES 



Distribution of this document is unlimited. 



It- SUPPLEMENTARY NOTES 



12. SPONSORING MILITARY ACTIVITY 



Bureau of Ships, Department of the Navy, 

 Washington, D. C. 20360 



Effects of siphonophores on sound propagation in the sea were studied by 

 determining the size of gas bubbles they contain and produce, and the times, 

 volumes, and rates involved in these processes. Major findings were: (1) 

 gases contained in fresh siphonophore floats are generally close to ambient 

 pressure, suggesting release of many bubbles during vertical ascent; (2) oxy- 

 gen consumption may be elevated during production of CO; (3) diffusion con- 

 stants for siphonophore floats are close to those for chitin; (4) calculated 

 energy requirements for countering hydrostatic pressures indicate that float 

 refilling times are probably no more than a few hours. 



DD , F ,°:i. 1473 



0101-807-6800 



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Security Classification 



