FISHERY BULLETIN: VOL. 83, NO. 4 



50- 



40- 



30- 



B 



1^ 

 



1 — I — I — 

 2 3 4+ 







I r 



I 2 



AGE 



n — I — 

 3 4 + 



1^ 

 



n 1 r 



2 3 4+ 



Figure 6.— Age composition of northern anchovies taken in the following geogra- 

 phical regions: A. Central California and offshore areas of the Southern California 

 Bight; Central California (CC), San Nicolas (SN), Tknner and Cortez Banks (TCB), 

 and Catalina Basin (CB); B. Inshore areas of the Southern California Bight; Santa 

 Barbara Channel (SBC), San Pedro Channel (SPC), and Coronado Escarpment (CE); 

 C. Baja California; Ensenada (E), Cape San Quentin (CSQ), Sebastian Viscaino Bay 

 (SVB), and Southern Baja California (SB). 



Table 4. — Percentage age composition of northern an- 

 chovies by geographical region: Central California (00), 

 San Nicolas (SN), Tanner-Cortez Banks (TOB), Oatalina 

 Basin (OB), Santa Barbara Channel (SBC), San Pedro 

 Channel (SPO), Coronado Escarpment (OE), Ensenada 

 (E), Cape San Quentin (CSQ) Sebastian Viscaino Bay 

 (SVB), Southern Baja California (SB). 



between 64 and 77% (Ikble 5). This is probably in- 

 fluenced by the fact that trawling (in the upper 30 

 m) was carried out normally in areas where fish 

 schools had already been detected by depth recorder 

 or sonar. 



In southern California (lat. 32°-34°N) young-of-the- 

 year anchovies comprise more than one-half of the 

 anchovies sampled in the 5-25 fathom-depth stratum 

 (Tkble 6A). One- and two-yr-olds comprise more than 

 one-half of the anchovies in the 26-50, 51-150, 



151-300, and 301-500 fathom strata. The most abun- 

 dant age group in the 26-50 stratum is age 1; there 

 are essentially equal numbers of age 1 and age 2 an- 

 chovies in the 51-150 and 151-300 strata; 2-yr-olds 

 are the most abundant age group in the 301-500 

 stratum; and 3-yr-olds are the most abundant age 

 group in the 701-1- stratum. Age groups 3-6-f- each 

 show an increasing percentage with increasing 

 depth. Collectively they comprise about 11% of the 

 5-25 stratum, 31% of the 51-150 stratum, and 51% 

 of the 701 -f- stratum. The same general pattern oc- 

 curs in northern Baja California (lat. 29.5°-32°N); 

 however, the percentage of young fish declines more 



Table 5.— Percentage of mid- 

 water trawl hauls taking north- 

 ern anchovies by depth strata. 

 Trawl hauls were normally with- 

 in 30 meters of the surface. 



492 



