SOUTAR and ISAACS: ABUNDANCE OF PELAGIC FISH 



u 



n 



h- 

 LJ 



Z 



a 



10.00 . 

 9-00 , 

 S-OO 

 7.00 

 S.OO 

 S.OO 

 4.00 

 3-00 

 S.OO 

 1.00 . 

 0.00 



PACIFIC SARDINE BIDMASS 



PACIFIC SARDItvE BIDMASS 



laao 1970 laGO 19S0 1940 1930 



19B0 1970 19G0 1350 1940 1330 13S0 



SARDINES. 2 YR. OLDS VS- YR. SPAWNED 



01 



_l 

 < 



a 



D 

 2 



O 

 LO 



z 

 a 

 1—1 



_i 

 -I 



25000-00 

 22500-00 

 20000-00 

 17500-00 

 15000-00 

 12500.00 . 

 10000.00 , 

 7500.00 . 

 5000.00 ., 

 2SOO-0O ., 

 0-00 



SARDINES. 2 YR. DLDS VS- YR. SPAWNED 



laeo 1970 1360 1350 1340 1330 13E0 



13B0 1370 19G0 1550 1340 1530 1320 



Figure 6. — Yearly estimates of Pacific sardine biomass 2-yr and older and year class size at 2 yr old (after Murphy, 1966). The yearly 

 population estimates (left) are grouped into 5-yr block averages (right) that correspond to the sampling intervals in the sediment. 



Table 7. — Comparison of Pacific mackerel larval abundance (Ahlstrom, 1969; Smith, in prep.), fishery landings (Fitch, 1952),* and 



scale-deposition rate in Santa Barbara and Soledad Basin sediment. 



'Also subsequent Gal. Dept. Fish and Game landing statistics, 

 ^incomplete data. 



267 



