eggs and larvae and associated hydrographic data over the entire 

 areal and seasonal spawning range of the species. On these survey 

 cruises, plankton tows were made to 70 m, a depth which 

 encompassed the vertical distribution of sardine eggs and larvae. 

 Wide-ranging joint biological and oceanographic survey cruises 

 were resumed in 1949 with sardine as the focus; however, an 

 increasing interest in other biological components resulted in the 

 deepening of standard tows to 140 m in 1951. This marked the 

 beginning of truly quantitative ichthyoplankton sampling on CalCOFI 

 surveys . 



Hydrographic data from 1984 CalCOFI surveys have been 

 published by Scripps Institution of Oceanography (Univ. of Calif., 

 SIO, 1984 a-d; 1985) . All available original records for 1984 

 were subjected to an extensive verification and editing process to 

 produce this CalCOFI ichthyoplankton data report. This, with 

 previous (Ambrose et al., 1987a-c; 1988a-d; Sandknop et al., 

 1987a, b; 1988a-d; Stevens et al., 1987a-c; 1988a, b; Sumida et al., 

 1987a, b; 1988a-c) and subsequent reports, make the CalCOFI 

 ichthyoplankton and station data available to all investigators and 

 serve as guides to the computer data base. The data base is 

 modified when errors are discovered and when composite taxa from 

 the earlier years are reidentif ied. These reports are the 

 fundamental reference documents against which subsequent changes in 

 the data base can be compared. 



SAMPLING AREA AND PATTERN 



In 1984, the eight CalCOFI cruises occupied stations during 

 portions of all months from January through July and during 

 October. The total of 918 stations included in this data base was 

 occupied on 8 cruises, with an average of 115 stations per cruise 



(range 70-158) . The station pattern covered in 1984 began at line 

 60, Pt. Reyes, California, and extended south to line 110, Rosario 

 Bay, Mexico. The entire pattern was covered on Cruises 8401, 8404, 

 8407, and 8410. Cruises 8402 and 8403 combined covered the whole 

 area as did Cruises 8405 and 8406. The offshore extent of the 

 coverage was to station 100 (ca. 200-300 miles offshore) on all 

 cruises with two exceptions: on Cruise 8404 coverage of lines 60 

 through 73.3 extended only to station 70 (ca. 80-180 miles 

 offshore) and on Cruise 8410 coverage of lines 63.3, 66.7, 70.0 

 and 76.7 ended with station 80 (ca. 120-220 miles offshore). 



(Figures 1-9, Table 1). 



Beginning in 1981 we changed our designation of ordinal 

 survey lines (those ending in "3" and "7") to an exact decimal 

 notation. Thus, lines 63,67,73,77 etc. were changed to 63.3, 66.7, 

 73.3, 76.7 etc. to indicate accurately the spacing between cardinal 

 lines (those ending with "0") . Scripps Institution of Oceanography 

 continues to use the original designation for ordinal lines as 



