ABUNDANCE OF SARDINE LARVAE, 1951-64 Relative abundance of sardine larvae in the CalCOFI survey area, 1951-64, based on average quarterly estimates of abundance is given in table 9. Sardine larvae were most abundant in 1954, decreased to about a fourth of this abundance by 1959-60, and have remained at a low level of abundance since then. In recent years (1961-64) most sardine larvae have been collected off central Baja California (station lines 110-137). We know from genetic studies utilizing blood antigens that the sardines off central Baja California are distinct from the stock off southern California. The latter has markedly decreased in abundance even relative to the "southern" stock of sardines off central Baja California. Table 9. --Relative abundance of sardine larvae in CalCOFI survey area, 1951-64, based on average quarterly estimates TABLES CONTAINING INFORMATION ABOUT SARDINE AND ANCHOVY LARVAE In the tables that follow, information on sardine larvae is presented before that for anchovy larvae. The sequence of tables is as follows: Tables 10-18, Size composition of sardine larvae, summarized by monthly cruise for individual years, 1951-59. Tables 19-23, Numbers of sardine larvae, tabulated by station, for 1958, 1959, 1960, 1961-62, and 1963-64. Tables 24-37, Occurrence and abundance of sardine larvae summarized by cruise and area for individual years, 1951-64. Tables 38-46, Size composition of anchovy larvae, summarized by monthly cruise for individual years, 1951-59. Tables 47-51, Numbers of anchovy larvae, tabulated by station, for 1958, 1959, 1960, 1961-62, and 1963-64. Tables 52-65, Occurrence and abundance of anchovy larvae summarized by cruise and area for individual years, 1951-64. Table 66, Numbers of stations occupied on CalCOFI surveys, summarized by cruise and area, 1951-64. It should be noted that small differences in cruise and yearly totals in some tables result from rounding off of values that originally were reported to the first decimal place. Table 10. --Sardine larvae--monthly cruise summaries of numbers by size, 1951 Midpoint of size class (mm.) Cruise 3.00 4.75 5.75 6.75 7.75 8.75 9.75 10.75 11.75 12.75 13.75 14.75 15.75 17.25 19.25 21.25 23.25 Dis.1/ Total Table 11.--Sardine larvae--monthly cruise summaries of numbers by size, 1952 Midpoint of size class (mm.) Cruise 3.00 4.75 5.75 6.75 7.75 8.75 9.75 10.75 11.75 12.75 13.75 14.75 15.75 17.25 19.25 21.25 23.25 Dis. Total Table 12.--Sardine larvae--monthly cruise summaries of numbers by size, 1953 Table 13. --Sardine larvae--monthly cruise summaries of numbers by size, 1954 Table 14. --Sardine larvae--monthly cruise summaries of numbers by size, 1955 Table 15. --Sardine larvae--monthly cruise summaries of numbers by size, 1956 Midpoint of size class (mm.) Cruise 3.00 4.75 5.75 6.75 7.75 8.75 9.75 10.75 11.75 12.75 13.75 14.75 15.75 17.25 19.25 21.25 23.25 & larger 1/ Dis. Total |