FISHERY INDUSTRIES OF THE UNITED STATES. 



REPORT OF THE DIVISION OF STATISTICS AND METHODS OF THE FISHERIES FOR 1920. 



By Lewis Radcliffe, Assistant in Charge. 



CONTENTS. 



Page. 



Introduction 5 



Summary of operations 5 



Service 6 



Aid in improving fishing operations 7 



Fishery intelligence service 7 



Use of aircraft 7 



New England fishery intelligence service 9 



Notes on fishing gear 9 



Paranzella net 9 



Lampara net 12 



Herring gill net 14 



Smelt net 14 



Trammel net 14 



Development of improvements in methods of handling, distributing, and mar- 

 keting 15 



Fresh fish 15 



Kippered fish 15 



Increasing the use of fish as food 16 



The haddock 16 



P>ozen fish 17 



Technological investigations 17 



Salting river herring 17 



Refrigeration of fish 18 



Canning of Pacific coast fishes 18 



Preservation of fish nets 19 



Increasing the use of by-products of fisheries 19 



Fish oils ". 19 



Fish scrap and meal 20 



Fish leather 20 



Shark fins 21 



Pearl essence or fish-scale essence 21 



New England vessel fisheries 22 



General statistics 22 



Species 42 



Cod 42 



Haddock , 43 



Hake 43 



Pollock 43 



Cusk 43 



Halibut 43 



Mackerel 44 



Swordfish 44 



Flounders 44 



Herring 45 



Veesel fisheries at Seattle, Wash 45 



Fishery products received at Municipal Fish Wharf and Market, Washington, 



49 



Appendix V to the Report of the U. S. Commissioner of Fisheries for 1921. B. F. Doc. 908. 



