CONTENTS. 



Page. 



Fishery industries services 5 



Review 5 



Fish merchandising 6 



Market surveys • 6 



Technological investigations 8 



Preservation of fishing nets and lines 8 



Canning of fishery products 8 



Freezing of fish in l)rine 9 



Brazilian International Centennial Exposition 9 



Canned fishery products and by-products 9 



Frozen-fish trade 11 



Smoked-fish industry of Maine 11 



New England vessel fisheries 12 



Vessel fisheries at Seattle, Wash 14 



Fisheries of California 15 



Fisheries of Maryland and Virginia 15 



Shad and alewife fisheries of the Potomac River 16 



Florida sponge fishery 17 



Inquiry respecting food fishes and fishing grounds 17 



Introduction 17 



Studies of fishes 18 



Investigations relating to fish culture 19 



Studies of river, lake, and sta 20 



Fresh -water mussels 21 



Oyster investigations 22 



Pollution of waters 23 



Biological laboratories 23 



Propagation and distribution of food fishes 24 



Review 24 



Distrilnition of output of hatcheries 26 



Relations with States in fish culture 26 



Cooperation with fish-protective associations 28 



Propagation of migrjitnry fishes of Atlantic rivers 28 



Propagation of commercial fishes of Great Lakes 29 



Propagation of Pacific salmons 30 



Production of marine species 32 



Cultivation of fishes of interior waters 34 



Rescue operations in Mississippi River valley 36 



Distribution of mosquito-eating fishes 37 



Alaska fisheries service 37 



Extent of the Alaska fisheries 37 



Enforcement of fishery laws and regulations • 3S 



Private salmon hatcheries 39 



New salmon-fishery regulations 39 



Special studies and investigations 42 



Protection of walrus and sea lions 42 



New legislation needed 42 



Future development of Alaska fislieries 43 



Alaska fur-seal service 44 



General activities at the Pribilof Islands 44 



Seal herd 45 



Take of sealskins 46 



Sales of sealskins 46 



Foxes and reindeer 47 



Cooperation with other Government agencies 47 



Vessel service notes, 1922 48 



Appropriations 50 



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