CONTENTS. 



Paee. 



Fishery industries ' ^ 



General considerations 5 



Utilization of by-products of the fisheries 7 



Investigation concerniiiti preservation of fish with salt 8 



Preservation of lislicry products by canning 9 



Preservation of fish nets 1<> 



Use of aeroplanes in the fisheries 10 



Miscellaneous Investigations 11 



New England vessel tisheries 11 



Vessel tislieries of Seattle 13 



Shad tishery of the Huds<m River 14 



Shad and alewife tisheri(>s of tlie Potomac River -_ 14 



Fisheries of the Great Lakes States 15 



Fisheries of the Gulf States 15 



Florida sponge fishery 16 



Biological investigations 17 



General condition of the work 17 



Studies of salmons and trouts 17 



Studies of other fislies ' 18 



Fish-cultural experiment work 19 



Mosquito control by the use of fish 19 



Study of fisli diseases . 19 



Shellfish investigations 20 



Miscellaneous studies 21 



Scientific work of the vessels 21 



The biological laboratories- 22 



Propagation and distribution of food fislies . 22 



Summary of the operations 22 



Hatching stations operated 24 



Distribution of the output 25 



Relations with the States 26 



Propagation of Pacific salmons 28 



Propagation of commercial fishes of the Great Lakes 35 



Cultivation of fishes of minor interior waters 40 



Propagation of river fishes of the Atlantic seaboard 44 



Marine fish hatching 46 



Rescue of stranded food fishes 47 



Acclimatization 49 



Artificial propagation of fresli-water mussels 50 



Alaska fislieries service 51 



General character of work 51 



Extent and condition of the fisheries 51 



Enforcement of fishery laws 53 



Scientific investigation of the Alaska fisheries 53 



Fishery reservations 54 



Private salmon hatcheries 54 



Wood River salmon census , 54 



Revision of regulations for salmon fisheries 55 



Alaska fur-seal service 56 



General activities 56 



The fur-seal herd 57 



By-products of the seal industry 59 



Foxes and reindeer 2 59 



3 



