OCEANOGRAPHIC AND BIOLOGICAL DATA, HAWAIIAN WATERS, 



JANUARY - JULY 1961 



By 



Kenneth Sherman, Fishery Biologist 



and 



Robert P. Brown, Oceanographer 



Bureau of Commercial Fisheries Biological Laboratory 



Honolulu, Hawaii 



INTRODUCTION 



This is our second report presenting 

 oceanographic and biological data collected on 

 cruises in the central Pacific area between 

 latitudes 15° N. and 26° N. , longitudes 145° W. 

 and 170° W. by research vessels of the Bureau 

 of Commercial Fisheries Biological Laboratory, 

 Honolulu, Hawaii. The first report (Sherman 

 and Brown, 1961) includes the tabulation of data 

 collected on five cruises made during January- 

 October 1959. 



The three oceanographic surveys made 

 in the period January-July 196 1 were the final 

 ones in a program undertaken by the Biological 



Laboratory, Honolulu, designed to: (1) delineate 

 the boundaries between the North Pacific Central 

 Water Type, the zone of intermediate salinity, 

 and the North Pacific Equatorial Water Type; 

 and (2) monitor the seasonal movements of those 

 boundaries and of the associated marine biota, 

 particularly the skipjack tuna, Katsuwonus 

 pelamis (Linnaeus). Cruise periods and vessel 

 tracks are shown in figures 1, 2, and 3. 



The present report contains a record of 

 observed physical and biological data from the 

 three 1961 cruises. These are presented with- 

 out analysis. 



Figure 1. --Vessel track for Charles H. Gilbert cruise 51, January 16 to February 28, 196 1. 



