PROPAGATION AND DISTRIBUTION OF FOOD FISHES, 

 FISCAL YEAR, 1933 ' 



By Glen C. Leach, Chief, Division of Fish Culture 



CONTENTS 



Introduction 451 



Species handled ^^ 452 



Output 454 



Cooperation with other conservation agencies 454 



Cooperation with sportsmen's organizations 455 



Salvage operations 457 



Assignment of fish eggs to States, Territories, and foreign countries 458 



Transfers of eggs between stations 459 



Output of fish 460 



Egg collections 467 



Notes on operations 468 



Commercial species 468 



Game fish propagation 471 



Rocky Mountain territory 472 



New "England stations 474 



Combination trout and pond-fish stations 475 



Warm- water or pond-fish stations 477 



Rescue operations and Upper Mississippi Wild Life Refuge 478 



Aquarium 479 



Fish-cultural notes 479 



Preservation of scrim in hatching boxes 479 



Distribution in national parks and national forests 480 



Destructiveness of spiders 480 



Cooperative fish culture with municipalities 480 



Distribution operations 481 



INTRODUCTION 



The system of Federal fish hatcheries inaugurated contemporary 

 with the establishment of the United States Fish Commission in 1872 

 reached its point of greatest expansion and development during the 

 3-ear ending June 30, 1983. New hatcheries and auxiliaries placed in 

 operation, together with enlargements and improvements of facilities 

 at older stations, rendered possible an output exceeded only once 

 previously. 



It is indisputably evident that the need which prompted the estab- 

 lishment of Federal hatcheries in 1872 must be emphasized many fold 

 60 years later. If the artificial replenishment of fish was essential 

 when the country was just emerging from the pioneer era, w^hat must 

 be the demand under conditions of increased poulation, industrializa- 

 tion, improved transportation, and added leisure time? The more 

 intense drain on aquatic life which civilization has imposed has in 

 part been met by fish-cultural activities on the part of a number of the 

 States, by protective legislation, and by the application of biological 



1 Appendix IV to the Report, Commissioner of Fisheries, 1933. Approved for publication, Mar. 3, 19M, 



451 



