Vizcaino Bay (line 120) in January and at San Diego (line 93) in 

 May and August. The June and September cruises covered northern 

 and central Baja California (lines 97-137) . The area off 

 southern Baja California (lines 140-157) was not surveyed in 

 1969. Typically, coverage did not extend beyond station 90 

 (approximately 160-260 miles offshore) ; however, coverage 

 extended seaward to station 140 (approximately 400-500 miles 

 offshore) on lines 90 and 93 in January, April, July and October; 

 and to station 120 (approximately 270-360 miles offshore) on all 

 lines from 40 through 77 in February . Some inshore stations 

 were occupied in 1969 which were not covered on early CalCOFI 

 surveys. These stations were included in the data base (Table 1) 

 but were omitted from the station plots (Figures 2-13) . 



Three vessels were employed on these cruises: the David 

 Starr Jordan and Miller Freeman of NMFS , and the Alexander 

 Agassi z of SIO. One to three vessels participated on each cruise 

 with two being the average number. The Alexander Agassi z was 

 used on 8 cruises, the David Starr Jordan on 7 and the Miller 

 Freeman on 1 (Univ. of Calif., SIO, 1976, 1977, 1979, 1980). 



After 1969, CalCOFI surveys were made on a triennial basis. 

 These began in 1972 and continued every 3 years (1975, 1978, 

 1981, 1984) until 1985 when annual surveys were resumed. 



SAMPLING GEAR AND METHODS 



In 1969, changes were made in both the gear and the method 

 used to collect CalCOFI ichthyoplankton samples (Smith, 1974). 

 The net material of the standard 1-m diameter ring net was 

 changed from silk bolting cloth to 0.505 mm nylon mesh 

 throughout; the cod end was constructed of 0.33 3 mm nylon 

 mesh (P. E. Smith, pers. comm.). The 1-m net was mounted on a 

 frame which also held a 1/2-m ring net constructed of 0.333 mm 

 nylon mesh throughout (see Fig. 6 in Kramer et al., 1972). The 

 frame was fastened to a short 3-lead bridle connected to several 

 meters of line which attached to the towing cable by a clamp. A 

 current meter was suspended in the center of the mouth of each 



CalCOFI lines (Figure 14) are arranged perpendicular to the 

 coastline and extend from the Canadian border (line 10) to below 

 Cape San Lucas, Baja California (line 157) . Stations were 

 established on the basis of a perpendicular to line 80 (off Pt. 

 Conception) at a point designated as station 60. Stations were 

 plotted seaward and shoreward from station 60 on each line. 

 Cardinal CalCOFI lines (those ending in "0") are 120 miles apart 

 and usually bracket two ordinal lines (ending in "3" or "7") , so 

 that lines are 40 miles apart over most of the pattern. Cardinal 

 stations are 40 miles apart and typically these are separated by 

 a station number ending in "5" so that stations are 20 miles 

 apart out to station 90 on most lines. Stations are placed at 

 closer intervals near the coast and islands to accommodate these 

 features (see Kramer et al., 1972 for further details). 



