402 U. S. BUREAU OF FISHERIES 



in lake or stream is an increment to the normal fish resources of that 

 body of water, and eggs of a commercial species fertilized, hatched, 

 and planted as a byproduct of a commercial fishery are an asset of 

 that commercial fishery. 



Public acceptance of this fact has resulted in a flood of recommen- 

 dations and requests urging the general establishment of new hatch- 

 eries in all parts of the country. Aside from the fact that funds are 

 not available, either for construction or maintenance of such projects, 

 it is essential to understand that natural limitations very frequently 

 make it desirable to concentrate the propagation work in a few of the 

 larger more efficient hatcheries. The conception of numerous local 

 rearing ponds for the purpose of "finishing off" the hatchery products 

 is sound, but these are much more modest projects than are visualized 

 by the average sportsmen's group interested in securing a Federal or 

 State hatchery for that section. However, the system of Federal 

 hatcheries is as yet incomplete as far as certain sections of the coun- 

 try are concerned, and these sections will be inadequately stocked 

 until some new hatcheries are built. 



The following tables and statistics are presented as a fisting, in 

 part, of the raw material available for anglers of 1936, 1937, and 

 subsequent years. 



SPECIES PROPAGATED 



Forty- three different species were propagated in suflicient numbers 

 to warrant a separate fisting, and several misceUaneous forms were 

 handled in small numbers largely in an experimental way. Included 

 in the output were pollock which were not propagated during the 

 previous year. No pink or humpback salmon were produced, but 

 a moderate number of cisco or lake herring eggs were secured and 

 hatched. Many of the species shown on the following fist are planted 

 directly from the hatcheries, private appficants not participating in 

 this distribution. 



Catfishes (Siluridae): 



Catfish {Leptops olivaris). 



Spotted catfish {Ictalurus pundalus) . 



Horned pout {Ameiurus nebulosus) . 

 Carp (Cyprinidae) : Common carp {Cyprinus carpio). 

 Btjffalofish (Catostomidae) : Common buflialo (/diofez/s sp.). 

 Shad and Herring (Clupeidae): 



Shad {Alosa sapidissima) . 

 Salmons, Trotjts, and Whitefishes (Salmonidae): 



Common whitefish (Coregonus clupeaformis) . 



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



Chum salmon {Oncorhynchus keta). 



Coho salmon, silver salmon {Oncorhynchus kisutch). 



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



Steelhead salmon {Salmo gairdneri). 



Atlantic salmon {Salmo salar). 



Landlocked salmon {Salmo sebago). 



Rainbow trout {Salmo shasta). 



Black-spotted trout, rcdthroat trout {Salmo leicisi). 



Loch Leven trout {Salmo levenensis). 



Lake trout, Mackinaw trout {Crislivomer namaycush) . 



Brook trout {Salvelinus fontinalis) . 

 Graylings (Thymallidae): Montana grayling {Thymallus inontanus). 

 Pikes (Esocidae): Pike and pickerel (Esox sp.). 



