Status of the spawning biomass of the Pacific sardine, 1974-75

In order to initiate a fishery for the Pacific sardine, Sardinops sajax caeruleus, it is required that the spawning biomass be determined to have reached a minimum of 20,000 short tons. Data from ichthyoplankton surveys, night-light surveys, the anchovy bait fishery and jack mackerel purse seine fishery are analyzed for evidence of an increase in the population size. The present level of the spawning population of the northern stocks of sardines is determined to be far below the 20,000 tons required to initiate a fishery. (14pp.

Status of the spawning biomass of the Pacific sardine, 1978-79

State law requires that the population of Pacific sardines, Sardinops sagax caeruleus, must reach a minimum spawning biomass of 20,O0O short tons before initiation of a fishery. Data from ichthyoplankton surveys, the anchovy live bait fishery, sea survey cruises, and the jack mackerel purse seine fishery are analyzed for evidence of an increase in population size. Presently, the spawning biomass of the northern stock of sardines remains far below 20,000 tons. (9pp.

Status of the spawning biomass of the Pacific sardine, 1975-1976

In order to initiate a fishery for the Pacific sardine, Sardinops sajax caeruleus, it is required that the spawning biomass be determined to have reached a minimum of 20,000 short tons. Data from ichthyoplankton surveys, night-light surveys, the anchovy bait fishery, and jack mackerel purse seine fishery are analyzed for evidence of an increase in population size. The present level of the spawning population of the northern stocks of sardines is determined to be far below the 20,000 tons required to initiate a fishery. (11pp.

Status of the spawning biomass of the Pacific sardine, 1980-81

State law requires that the population of Pacific sardines, Sardinops sagax caeruleus, must reach a minimum spawning biomass of 20,000 short tons before initiation of a fishery. Data from ichthyoplankton surveys, the anchovy live bait fishery, sea survey cruises, and the mackerel purse seine fishery are analyzed for evidence of an increase in population size. Presently, the spawning biomass of the northern stock of sardines remains far below 20,000 tons. (9pp.

Status of the spawning biomass of the Pacific sardine, 1983-84

State law provides for the initiation of a fishery for Pacific sardines, Sardinops sagax caeruleus, when the spawning biomass of sardines reaches 20,000 short tons. Data from ichthyoplankton surveys, sea survey cruises, the mackerel fishery sampling program, and the live-bait fishery monitoring program are discussed with regard to an increase in population size. It appears that the spawning biomass of the northern stock of Pacific sardines remains below 20,000 tons. Legislation passed in 1983 which affects the incidental take and commercial use of sardines is also discussed. (9pp.

Status of Pacific Mackerel spawning population, 1976

In order to initiate a fishery for the Pacific mackerel, Scomber japonicus, it is required that the spawning biomass be determined to have reached 10,000 short tons. Tag and recovery data and jack mackerel, Trachurus symmetricus, fishery data are analyzed for evidence of an increase in Pacific mackerel population size. The present level of the spawning population of Pacific mackerel, although larger than in recent years, is determined to fall short of the 10,000 tons needed to initiate a fishery. (24pp.

Status of the spawning biomass of the Pacific sardine, 1976-77

In order to initiate a fishery for the Pacific sardine, Sardinops sagax caeruleus, it is required that the spawning biomass be determined to have reached a minimum of 20,000 short tons. Data from ichthyoplankton surveys, sea survey cruises, the anchovy bait fishery, and jack mackerel purse seine fishery are analyzed for evidence of an increase in population size. The present level of the spawning population of the northern stocks of sardines is determined to be far below the 20,000 tons required to initiate a fishery. (8pp.

Average lunar monthly catch of sardines in California for the 1954-55 through 1961-62 seasons

The catch per unit of effort of the sardine along the coast of California has been published for the period 1932 to 1953. This paper continues the catch per unit of effort study through the 1961-62 season. Although the catch per unit of effort varied greatly during this later period, it never reached the high levels reported during the 1940's or decreased below the values reported for the disastrous seasons of 1952-53 and 1953-54. Mortalities and year class strengths are briefly discussed. (45pp.

Status of the spawning biomass of the Pacific sardine, 1981-82

State law requires that the population of Pacific sardines, Sardinops sagax caeruleus, must reach a minimum spawning biomass of 20,000 short tons before initiation of a fishery. Data from ichthyoplankton surveys, the anchovy live bait fishery, sea survey cruises, the mackerel purse seine fishery, and a brown pelican food study are discussed concerning evidence of an increase in population size. The spawning biomass of the northern stock of sardines appears to be remaining well below 20,000 tons. (9pp.

Status of the spawning biomass of the Pacific sardine, 1982-83

State law provides for the initiation of a fishery for Pacific sardines, Sardinops sagax caeruleus, when the spawning biomass of sardines reaches 20,000 short tons. Data from ichthyoplankton surveys, sea survey cruises, the mackerel fishery sampling program, and the live bait monitoring program are discussed with regard to an increase in population size. It appears that the spawning biomass of the northern stock of Pacific sardines remains below 20,000 tons. (7pp.