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 guantitative ichthyoplankton sampling on 

 CalCOFI surveys. 



Data resulting from CalCOFI surveys in 1960 have been 

 published in a number of forms. Hydrographic data (Univ. of 

 Calif., SIO, 1961, 1962) and zooplankton volumes (Thrailkill, 

 1969; Smith, 1971) were presented in standard formats. 

 Distributional maps of larvae of 5 taxa taken on CalCOFI surveys 

 during 1960 are presented in the CalCOFI Atlas series: northern 

 anchovy (Engraulis mordax) , Kramer and Ahlstrom, 1968; jack 

 mackerel (Trachurus symmetricus) and Pacific hake (Merluccius 

 productus) , Ahlstrom, 1969; Pacific sardine {Sardinops sagax) , 

 Kramer, 1970; rockfish (Sebastes spp.), Ahlstrom et al., 1978. 

 Other atlases provided distribution maps of 6 mesopelagic fish 

 larvae (Ahlstrom, 1972) and 8 flatfish taxa (Ahlstrom and Moser, 

 1975) taken during 1960. 



A computer data base for eggs and larvae of sardine and 

 anchovy and for larvae of hake, and jack and Pacific mackerels 

 was established in 1969. The development of a data base for 

 other fish larvae is a complex undertaking because competency of 

 identification has evolved steadily over the past 38 years. We 

 began the task of producing a CalCOFI ichthyoplankton data base 

 and associated data report series in 1983. All available 

 original records for 1960 were subjected to an extensive 

 verification and editing process to produce this report. This 

 and previous (Ambrose et al., 1987 a,b; Sandknop et al., 1987 

 a,b; Stevens et al., 1987 a,b,c; Sumida et al., 1987 a,b) 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 will be modified when 

 additional errors are discovered and when composite taxa from the 

 earlier years are reidentif ied. These reports are the 

 fundamental reference documents against which subseguent changes 

 in the data base can be compared. 



SAMPLING AREA AND PATTERN 



In 1960, CalCOFI survey cruises were conducted at monthly 

 intervals, except for November and December. A total of 1814 

 stations included in this data base was occupied on 10 cruises, 

 with an average of 181 stations per cruise (range 41-333) . 

 Coverage of the survey station pattern varied among cruises and 

 the entire quarter-million square mile survey area was not 

 covered on any single cruise (Figures 1-11, Table 1) . The area 

 off northern California (lines 40-57) was covered on only two 

 cruises (January, April); two stations (50,55) were occupied on 

 line 50 in July. Coverage off central California (lines 60-77) 

 was more consistent with all major lines occupied in January, 



