Egg Distribution Maps for Sardine, Anchovy, and Jack Mackerel


The Fisheries Resources Division uses a device known as the continuous underway fish egg sampler, or CUFES, to collect fish eggs while the ship is underway. Eggs captured by the CUFES are counted onboard the ship every thirty minutes or less. These data are normally transmitted to shore each day during the annual spring cruise. These maps illustrate the progress of the ship in assessing densities of Pacific-sardine, northern-anchovy, and jack mackerel eggs. Data from the CUFES along with other samples are used to assess the biomass of the sardine population in U.S. waters via the daily egg production method ( Lo et al. 2004). Recent stock assessments for sardine can be downloaded from the Pacific Fishery Management CouncilThe previous link is a link to Non-Federal government web site. Click to review NOAA Fisheries disclaimer

Previous Spring Cruises

Egg maps from previous cruises are linked below. Each figure depicts the sampling pattern of the ship(s) as red lines, and number of sardine, anchovy, and jack mackerel eggs captured per cubic meter as vertical bars. The data are overlaid on an image of satellite-derived sea-surface temperature (degrees celsius) based on one-month mean temperatures near the middle of the sampling period (e.g., centered on 15 April). White areas indicate temperatures outside the range of 11-19 degrees or where no temperature data are available. Sea-surface temperature data were obtained from the NOAA CoastWatch website. They are from Pathfinder 5.5-km resolution measurements until 2008, and AVHRR 1.4-km resolution data thereafter.

These data can can be accessed via ERDDAP at

Dataset ID: erdCalCOFIcufes

Images for previous years:

20182017 2016 201520142013201220112010200920082007200620052004200320022001200019991998,


All years on a single page can be viewed here.

Send comments or suggestions to Ed Weber

Current Cruise

The 2020 spring DEPM and CalCOFI surveys have been canceled.