532 U. S. BUREAU OF FISHERIES 



considerable financial bearing, arising from the large expenditures by 

 the public in the pursuit of game fish. This phase was clearly brought 

 out in the report of the Senate Committee on Conservation of Wild 

 Life Resources to the Seventy-first Congress. It is comparatively 

 easy to demonstrate by facts and figures the beneficial results attend- 

 ing the stocking of game fish in any given area, or even of commercial 

 fishes in the minor interior waters. The hatching and distribution of 

 such migrants as the Pacific salmons and other marine varieties does 

 not lend itself so readily to a statistical analysis of the direct benefits. 

 However, in many instances, as in the case of shad, cod, haddock, 

 pollock, and anadromous forms, hatchery activities are in the nature 

 of a by-product recovery, since the eggs not taken and incubated by 

 artificial means would be utterly lost in the marketing of the fish. 

 The commercial forms can be handled in large numbers at a very 

 small unit cost, and justification for the greater part of the hatchery 

 work devoted to the maintenance of the commercial industry lies in 

 the foregoing general facts. 



Part 1.— FISH PRODUCTION: PROPAGATION AND 

 RESCUE WORK 



SPECIES HANDLED 



Practically all parts of the United States and certain areas in the 

 Territory of Alaska are covered by the activities of the bureau's 

 hatcheries. Practically every fresh-water form of any importance 

 from a commercial or game standpoint is included among the 49 

 species which were propagated or handled by rescue crews during the 

 fiscal year 1932. A few selected groups of marine fishes are propa- 

 gated, but a considerable number of the important species in this cate- 

 gory are not readily susceptible to propagation methods or are not in 

 need of such conservation measures at this time and, therefore, are 

 not handled by the hatcheries. There follows a list of the species 

 propagated for the fiscal year 1932. 



Catpishes (Silurid^e) : 



Catfish (Leptops olivaris). 



Spotted catfish {Idalurus pundatus). 



Horned pout {Ameiurus nebulosus). 

 Suckers (CATOSTOMiDiE) : Buffalofish {Ictiobus sp.) and suckers (Catostomus 



commersonii) . 

 Carp (Cyprinid^) : Common carp (Cyprinus carpio). 

 Shad and Herring (Clxjpeid^) : 



Shad {Alosa sapidissima) . 



Glut herring {Pomolobus aestivalis). 

 Salmons, Trotjts, and Whitefishes (Salmonid^) : 



Common whitefish (Coregonus dupeaformis) . 



Cisco (Leucichthys artedi). 



Chinook, king, or quinnat salmon (Oncorhynchus tschawytscha) . 



Chum salmon (Oncorhynchus kda). 



Pink or humpback salmon {Oncorhynchus gorbuscha) . 



Coho salmon, silver salmon {Oncorhynchus kisutch). 



Red salmon, sockeye, or blueback salmon {Oncorhynchus nerka). 



Steelhead salmon (Salmo gairdneri) . 



Atlantic salmon {Salmo saiar). 



Landlocked salmon {Salmo sebago). 



Rainbow trout {Salmo shasta). 



Golden trout {Salmo roosevelti). 



