Fish egg counts and standardized counts for eggs captured in CalCOFI icthyoplankton nets (primarily vertical [Calvet or Pairovet], oblique [bongo or ring nets], and surface tows [Manta nets]). Surface tows are normally standardized to count per 1,000 m3 strained. Oblique tows are normally standardized to count per 10 m2 of surface sampled. This table includes only tows where one or more eggs were captured for the species selected by the user, i.e., no "zero" tows. The "Egg Counts" table includes all tows by species, i.e., both positive and negative tows.
In 1983, the groundfish analysis project began a series of yearly cruises designed to assess the annual abundance of juvenile rockfish along the central California coast. Midwater trawls were collected and CTDs performed during late spring of every year since 1983. Initially the cruises were restricted to the San Francisco area; however, in the early 2000's, the geographic range was extended to include San Diego through Fort Bragg.
During the period 1987-2009 the Southwest Region (now West Coast Region) collected beach seine fish samples in the San Diego area in conjunction with eelgrass restoration projects. Data collected included location, species, length and number.
An aerial monitoring program was conducted during the period 1962 - 2003 in cooperation with aerial spotters working for the commercial purse seine fleet. Flights were conducted throughout the year to estimate abundance of pelagic fishes off California and Baja California, Mexico. Measurements were recorded for each identifiable species in 10'-longitude by 10'-latitude blocks. Northern anchovy, (Engraulis mordax), Pacific sardine (Sardinops sagax), Pacific bonito (Sarda chiliensis), Pacific mackerel (Scomber japonicas), jack mackerel (Trachurus symmetricus) and Bluefin tuna (Thunnus thynnus orientalis) were the most commonly reported species.
This project was part of a larger international project (SPLASH) designed to estimate the abundance and determine the population structure for humpback whales throughout the North Pacific involving the governments of Canada and Mexico as well as multiple agencies within the government of the U.S. The primary study methods were photo-identification and biopsy sampling. Passive acoustics were used to aid in finding aggregations of whales. In addition, biological and oceanographic data were collected to better characterize the whale’s environment, and survey data were collected for all other cetacean and pinniped species observed. Biopsy samples were also taken from other cetacean species, primarily in areas where they have been poorly sampled in the past. The Hawaiian Island Humpback Whale Sanctuary (HIHWS) collaborated on this cruise by sending two skilled photographers on each leg of survey effort. The U.S. Navy collaborated on this cruise by funding the acoustic and oceanographic sampling.