Maps depicting Ichthyoplankton cruises (1937 to 1941) and CalCOFI cruises (1949 to present)
Cruises from 1937 through 1987 are adapted from Hewitt, R.P. 1988. Historical review of the oceanographic approach to fishery research. CalCOFI Report, Vol XXIX. Cruises from 1988 to present are drawn from published CalCOFI data reports and recent unpublished data.