160 



U, S. BUREAU OF FISHERIES 



obtained in 1929. Excluding these products, there was a decrease of 

 19 per cent as compared with the production in 1929. The scrap 

 and meal group was the most valuable and accounted for 25 per 

 cent of the total value of fishery by-products. Fresh-water mussel- 

 shell products followed, with 21 per cent. The other groups in order 

 were marine pearl-shell products, accounting for 19 per cent; marine 

 animal oils, 18 per cent; oyster-shell products, 11 per cent; and mis- 

 cellaneous by-products, which included fish glue, herring skins and 

 scales, shark skins, fins, and meat, agar, pickled whale meat, whale- 

 bone, and isinglass, accoimted for 6 per cent. 



OILS 



In 1930 the production of marine animal oils amounted to 14,704,784 

 gallons, valued at $4,200,064, which is a decrease of 4 per cent in 

 quantity and 38 per cent in value, as compared with the production 

 of the preceding year. Of the total production, 39 per cent consisted 



PRODUCT 



MILLIONS OF POLLAnS 



Figure 10.— Value of fishery by-protlucts in the United States and 

 Alaska, 1930 



SCRAP, MEAL, ETC. 



of pilchard or sardine oil; 25 per cent, herring oil (from Maine and 

 Alaska herring and alewives); 22 per cent, menhaden oil; 10 per 

 cent, whale and sperm oil; and 4 per cent, other marine-animal oils, 

 which include that from cod and cod livers, salmon, shark, tuna, 

 mackerel, and miscellaneous fish cuttings and waste. 



In 1930 the production of marine-animal scrap, meal, etc., amounted 

 to 126,605 tons, valued at $5,976,669. This is a decrease of 11 per 

 cent in quantity and 12 per cent in value as compared with the pro- 

 duction in 1929. Of the total production, 26 per cent consisted of 

 dried menhaden scrap and meal, 12 per cent acidulated menhaden 

 scrap and meal, 2 per cent shrimp meal, 57 per cent miscellaneous 

 dried scrap and meal (other than menhaden), and 3 per cent mis- 

 cellaneous crude or green scrap. The largest item in the miscellaneous 

 dried scrap and meal group was pilchard meal, amounting to 25,938 

 tons, valued at $1,414,858. 



