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DEPARTMENT OF FISH AND GAME 



A major accomplishment during the biennium was the development of a very promising tuna 

 tag. The tag is made of plastic tubing. Top, applying the tag. Bottom, the tag in place. 



PACIFIC MACKEREL 



The catch of Pacific mackerel (Pneumatophorus diego) dropped, dur- 

 ing the biennium, to the lowest level in 19 years. 



Age work on the Pacific mackerel was completed for the 12-season 

 period 1939-40 through 1950-51 and the results of this study were pub- 

 lished (Fish Bulletin 83). This study showed that old fish comprising 

 reserve spawning stock are so reduced in numbers that the present-day 

 fishery, in order to maintain itself, depends upon each year's hatch. As 



