8 DISTRIBUTION OF FISH AND FISH EGGS, 1915. 
understanding that the young fish resulting therefrom are to be dis- 
tributed in public waters. The Bureau does not furnish eggs for 
stocking hatcheries whose output is regularly offered for sale. 
SIZE OF ALLOTMENTS. 
It is customary to assign but one species of fish on an application, 
and only one application for the stocking of a body of water at a 
given point is considered. The number of fish assigned on an appli- 
cation is based upon the water area described, only a sufficient number 
being allowed to serve as a brood stock, with the understanding that 
the waters in which they are to be placed will be properly protected 
until the fish have had time to mature and establish themselves 
through natural reproduction. The actual number assigned is also 
dependent upon the species, the size of the fish, and the number 
available for distribution. In the case of the various trouts 250 
fish 2 inches in length, or 50 fish 6 inches in length, are fully equal 
to 2,500 fry for stocking purposes. Pike perch, which, owing to 
their excessive cannibalism, can not be reared beyond the fry stage, 
may be supplied in lots of half a million, where the same water area 
would receive only 200 or 300 young bass from 2 to 5 inches long. 
The larger fish have a much better chance of reaching maturity than 
have the fry, and therefore their value for stocking purposes is many 
times greater. } 
Owing to the Bureau’s inability to produce the black basses, 
crappies, catfishes, and sunfishes in sufficient numbers to meet the 
demands, the allotments of such species are of necessity limited to 
the smallest number required to form a brood stock for the water 
area in question. 
SPECIES CULTIVATED. 
During the fiscal year 1915 the Bureau handled some 50 species 
of fish, the fresh-water mussel, and the lobster. Of these the following 
were produced at its regular propagating stations: 
THE CATFISHES (SILURIDA): 
Horned pout, bullhead, yellow cat (Ameiurus nebulosus). 
Marbled cat (Ameiurus nebulosus marmoratus). 
THE SUCKERS AND BUFFALOFISHES (CATOSTOMID): 
Smallmouth buffalofish (Jctiobus bubalus). 
Common buffalofish (Ictiobus cyprinella). 
Black buffalofish (Jctiobus urus). 
Yellow sucker (Catoslomus commersonit). 
THE SHADS AND HERRINGS (CLUPEIDZ): 
Shad (Alosa sapidissima). 
Glut herring, blueback (Pomolobus exstivalis). 
THE SALMONS, TROUTS, WHITEFISHES, ETC. (SALMONIDZ): 
Common whitefish (Coregonus albus and C. clupeaformis). 
Lake herring, cisco (Leucichthys artedi). 
Chinook salmon, king salmon, quinaat salmon (Oncorhynchus tschawytscha). 
