FISH MEAL AND OIL 



473 



Table 103. Menhaden Utilized and Products of the Menhaden Industry, 



1939 to 1948. 



• A small production of acidulated scrap has been included with dry scrap and meal. 

 Source : U. S. Fish and Wildlife Service. 



Million 

 Gallons 



40 



TOTAL 



1923 1925 1930 1935 1940 1945 1947 



(Courtesy U. S. Fish and Wildlife Service) 



Fig. 22-2. The production of fish and marine animal oils has shown a 

 continuous dechne since 1944, and a more or less general decline since reach- 

 ing a peak of nearly 40 million gallons in 1936. The steady decrease during 

 the past three years is primarily due to the failure of the pilchard 'fishery in 

 California. 



The domestic production of fish oil during April was less than that of a 

 year ago, due to decreases in the quantity of tuna and mackerel and men- 

 haden oils processed. Compared with April, 1947, the production of fish meal 

 increased, with groundfish meal showing the major gain. 



General Discussion of Process 



Unloading the Vessel. All of the more progressive reduction plants unload the 

 vessels by mechanical means. The most common of these is the bucket-type eleva- 

 tor which is lowered into the hold of the vessel. The fish are hoisted from the 



