247) . Coverage of the survey station pattern varied among 

 cruises and the entire survey area was not covered on any 

 single cruise (Figures 1-5, Table 1) . Stations off northern 

 California (lines 40-57) were not occupied in 1962. Coverage off 

 central California (lines 60-77) was a disjunct pattern extending 

 offshore to station 200 on lines 60, 63 (on Cruise 6210 only) and 

 70 in each cruise except 62 07. The area between Pt. Conception 

 and Cape San Lazaro (lines 80-140) was surveyed on all cruises 

 with the exception of Cruise 6207 which extended south only to 

 line 130. The seaward-most station occupied on these lines was 

 station 200 on lines 80, 83 (on Cruise 6210 only) and 90, a 

 distance approximately 600-700 miles of f shore -"-. Typically, 

 coverage extended to station 90 (ca. 160-260 miles offshore) or 

 120 (270-360 miles offshore) on those lines which did not go 

 offshore to station 200 during 1962. 



Four vessels were employed on these cruises: the Black 

 Douglas of NMFS ; the Alexander Agassi z , Horizon, and Paolina T of 

 SIO. Two vessels participated on each cruise. The Black Douglas 

 was used on all four cruises, the Horizon on two cruises, and the 

 Paolina T and Alexander Agassiz on one cruise each (Univ. of 

 Calif., SIO, 1962, 1963). 



SAMPLING GEAR AND METHODS 



The standard CalCOFI net used from 1949 to 1969 had a 1-m 

 diameter mouth opening (0.785 m^ area) and an overall length of 

 about 5 m. The net was constructed of 3 0xxx gauze, a heavy duty 

 grade of silk bolting cloth, with a mesh size of 0.55 mm after 

 shrinkage. The last 40 cm of the cone and the cod end were 

 constructed of 56xxx grit gauze which had a mesh size of 0.25 mm 

 after shrinkage. The net ring 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 net mouth to measure volume of water filtered (see 

 Kramer et al., 1972, for further details). 



■'■CalCOFI lines (Figure 6) 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 4 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). 



