Spawning biomass of the northern anchovy (Engraulis mordax) in the Gulf of California during 1992

Spawning biomass of the northern anchovy, Engraulis mordax, in the Gulf of California during 1992, was estimated in 135 147 metric tons (cv = 0.509), using the Daily Egg Production Method (DEPM). Data are based on the ratio between the daily egg production and the specific daily fecundity of the population. Ichthyoplankton and midwater trawl samples show that the main spawning area of anchovy extends from the northern tip of Angel de la Guarda Island through 30 nautical miles south of Tiburon Island. Northern anchovy population distributed farther north in the Gulf of California during 1992, due to the El Nino warm waters event, than it had been in 1991.