754 U. S. BUEEATJ OF FISHERIES 



BY-PRODUCTS 



In 1929 the total value of by-products, including products of men 

 haden, whaling, and fresh-water mussel-shell industries, amounted to 

 S23,767,656. This is an increase over the previous year's value of 

 60 per cent. However, statistics of the fresh-water mussel-shell 

 products which amounted to $6,144,515 in 1929, were not obtained 

 for 1928. Excluding mussel-shell products, the increase over a year 

 ago amounted to 18 per cent. The scrap and meal group, and the 

 marine animal oils group were the most valuable and each accounted 

 for 29 per cent of the total value. Fresh-water mussel-shell products 

 followed with 26 per cent, and oyster-shell products with 10 per cent. 

 Miscellaneous bj^-products, which include herring skins and scales, 

 shark skins and fins, fish flour, agar, kelp products, isinglass, pickled 

 whale meat, and whalebone made up the remaining 6 per cent. 



OILS 



In 1929 the production of marine animal oils amounted to 15,353,057 

 gallons valued at $6,801,619, which is an increase of 26 per cent in 

 quantity and 32 per cent in value when compared with the preceding 

 year. Of the total production, 21 per cent consisted of menhaden oil, 

 42 per cent pilchard or sardine oil, and 23 per cent herring oil (from 

 Maine and Alaska herring, and alewives). The production of whale 

 and sperm oil amounted to 9 per cent of the total. The remaining 5 

 per cent consisted of oils from salmon, tuna, mackerel, cod and cod 

 Uvers, lake herring, and from miscellaneous fish cuttings and waste. 

 The production and value in 1929 was greater than for any year for 

 which there are records. 



SCRAP, MEAL, ETC, 



In 1929 the production of marine animal scrap, meal, etc., amounted 

 to 142,681 tons, valued at $6,801,362. This is an increase of 37 per 

 cent in quantity and 26 per cent in value as compared with the produc- 

 tion in 1928. Both quantity and value were greater than for any 

 year during the period 1921 to 1928. Of the total production 23 per 

 cent consisted of dried menhaden scrap and meal, 16 per cent acidu- 

 lated menhaden scrap, 56 per cent miscellaneous dried scrap and 

 meal (other than menhaden), 3 per cent crude or green scrap, and 2 

 per cent shrimp meal. The largest single item is pilchard meal in 

 the miscellaneous dried scrap and meal group. The production of 

 this commodity reached 36,500 tons, valued at $1,960,603, in 1929. 

 All groups increased over 1928. 



