ALVARINO: DISTRIBUTION OF SIPHONOPHORES 



detailed sets of investigations to enlighten further 

 the distribution and the characteristics of the 

 populations of siphonophores, their fluctuations in 

 time and locations, concurrently with the hydro- 

 graphic, ecological characteristics and other 

 variants. 



The author regrets that the pertinent hydro- 

 graphic data obtained concurrently with the 

 zooplankton collections were not available in time 

 to be included in the discussion of results. 



ACKNOWLEDGMENTS 



I am deeply indebted to B. Kimor, O. H. Oren, 

 and F. D. Por, for providing me with the valuable 

 Israeli collections of siphonophores from the 

 eastern Mediterranean and the Gulf of Elat, and 

 from their encouragement to complete this piece 

 of work. This paper was presented at the XVII 

 International Zoological Congress, Symposium on 

 Biological Effects of Interoceanic Canals, Monte 

 Carlo, 24-30 September 1972. 



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