the Pacific mackerel catch. . , ." Theyfurther 

 reported a recommendation by the California 

 Department of Fish and Game for a bag limit 

 on Pacific mackerel which was not imple- 

 mented. 



6.2 Control or alteration of physical fea- 

 tures of the environment 



6.3 Control or alteration of chemical 

 features of the environment 



None. 



6.4 Control or alteration of biological 

 features of the environment 



None. 



None. 



6.5 Artificial stocking . 



None. 



1930 



1935 



1940 1945 1950 



YEAR 



1955 



I960 



1965 



Figure 9. — Landings of Pacific mackerel in California, 1926-66 (See Table 4). 



LITERATURE CITED 



AHLSTROM, ELBERT H. 



1956. Eggs and larvae of anchovy, jack 



mackerel, and Pacific mackerel. Calif. 



Coop. Oceanic Fish. Invest. Progr. 



Rep., 1955-1956: 33-42. 

 1959a. Sardine eggs and larvae and other 



fish larvae Pacific coast, 1957. U.S. 



Fish Wildl. Serv., Spec. Sci. Rep. Fish. 



328, vi + 99 pp. 

 1959b. Vertical distribution of pelagic fish 



eggs and larvae off California and Baja 



California. U.S. Fish Wildl. Serv., 



Fish. Bull, 60: 107-146. 

 AHLSTROM, ELBERT H., and ROBERT C. 

 COUNTS. 

 1955. Eggs and larvae of the Pacific hake 



Merluccius productus . U.S. Fish Wildl. 



Serv., Fish. Bull. 56: 209-245. 

 AYRES, W. O. 



1856. Description of a new species of 



mackerel. Proc. Calif. Acad. Sci. 1:101. 

 CROKER, RICHARD S. 



1933. The California mackerel fishery. 



Calif. Div. Fish Game, Fish Bull. 40, 



149 pp. 



1938. Historical account of the Los Angeles 

 miackerel fishery. Calif. Div. Fish 

 Game, Fish Bull. 52, 62 pp. 

 FITCH, JOHN E. 



1951. Age composition of the southern Cali- 

 fornia catch of Pacific mackerel 1939- 

 40 through 1950-51. Calif. Dep. Fish 

 Game, Fish Bull. 83, 69 pp. 



1952. The decline of the Pacific mackerel 

 fishery. Calif. Fish Game 38: 381-389. 



1956. Pacific mackerel. Calif. Coop. 



Oceanic Fish. Invest. Prog. Rep. 1956. 



pp. 29-32. 

 FRY, DONALD H., JR. 



1936a. A description of the eggs and larvae 



of the Pacific mackerel ( Pneumatopho- 



rus diego ). Calif. Fish Game 22: 28- 



297 

 1936b. A preliminary summary of the life 



history of the Pacific mackerel ( Pneu- 



matophorus diego ). Calif. Fish Game 



22: 30-39. 

 FRY, DONALD H., JR., and PHIL M. ROEDEL. 

 1949. Tagging experiments on the Pacific 



mackerel ( Pneumatophorus diego) . 



Calif. Div. Fish Game, Fish Bull. 73, 



64 pp. 



17 



