FISHERY BULLETIN: VOL. 75, NO. 2 



species found, or likely to be found, in the 

 zooplankton of the CalCOFI survey area. Allow- 

 ing for the fact that somewhere between one-half 

 and three-quarters of these species will probably 

 occur infrequently in samples, the labor involved 

 in routinely analyzing for this number of species is 

 very considerable. The geographical distributions 

 of species belonging to many of the major taxa 

 within the zooplankton have been studied and 

 published in the CalCOFI Atlas series which 

 could provide the basis for the selection of a 

 limited number of species which will represent the 

 range of geographical distributions in the survey 

 area and, hopefully, will provide a good represen- 

 tation of the range of year-to-year fluctuations in 

 abundance. 



ACKNOWLEDGMENTS 



My thanks are due to Brian Rothschild, 

 Director, Southwest Fisheries Center, National 

 Marine Fisheries Service, NOAA, for making 

 available to me the facilities of the La Jolla 

 Laboratory. I also thank J. D. Isaacs for furnish- 

 ing unpublished data. Nancy Wiley and Dorothy 

 Roll were of great assistance in the computations 

 involved in the study and John G. Wyllie helped 

 with some data problems. Finally I must thank 

 Paul E. Smith whose knowledge of the California 

 Current region and of the CalCOFI survey was 

 invaluable. My visit to the La Jolla Laboratory 

 was supported by the U.K. Natural Environment 

 Research Council. 



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