DISTRIBUTION OF FISH AND FISH EGGS, 1912. 7 



SIZE OF ALLOTMENTS. 



The Bureau does not attempt to furnish to any one applicant 

 more than a brood stock of fish for a given private pond or stream, 

 it being expected that these will be protected until they have had 

 time to reproduce. The number of fish m an allotment is, however, 

 a variable quantity, depending upon the species and the age at 

 which distributed. Brook trout, which are distributed both as fry 

 and fingerlmgs, are allotted in much larger numbers as fry than as 

 fii:igerlings 3 or 4 inches long. Pike perch, which, owing to their 

 excessive cannibalism, can not be reared and are consequently dis- 

 tributed as fry, may be suppHed in lots of half a million, where an 

 equal water area would receive only 200 or 300 young bass from 2 to 

 5 inches long. These latter larger fish have a much better chance of 

 reaching maturity than have the fry, and the actual value for stocking 

 purposes of a few hundred fuigerling bass may therefore equal many 

 thousand times this number of pike perch fry. 



SPECIES CULTIVATED. 



The species handled by the Bureau in 1911 and 1912 numbered 

 some 50 fishes and the lobster. Of these, the following were arti- 

 ficially propagated: 



The catfishes (Silurid.e): 



Horned pout, bullhead, yellow cat {Ameinrus nebulosus). 



Marbled cat {Ameiurus nebulosus marmoratus) . 

 The suckers and buffalo-pishes (Catostomid.e): 



Small-mouth buffalo-fish {Ictiobus biibalus). 



Common buffalo- fish {Ictiobus cyprinella). 



Black buffalo-fish {Ictiobus urus). 

 The shads and herrings (Clupeid^): 



Shad {Alosa sapidissima) . 

 The salmons, trouts, whitefishes, etc. (Salmonid.e): 



Common whitefish {Coregonus albus and C. clupeaformis). 



Lake herring, cisco {Leucichthys artedi). 



Chinook salmon, king salmon, c^uinnat salmon (Oncorhynchus tschawytscha). 



Silver salmon, coho {Oncorhynchus hisutch). 



Blueback salmon, redfish, sockeye {Onchorhynchus nerka). 



Humpback salmon {Oncorhynchus gorbuscha). 



Dog salmon {Oncorhynchus Iceta). 



Steelhead trout, hardhead {Salmo gairdneri). 



Rainbow trout {Salmo irideus). 



Atlantic salmon {Salmo salar). 



Landlocked salmon {Sabno sebago). 



Blackspotted trouts: Yellowstone Lake trout or cutthroat trout {Salmo lewisi); 

 Tahoe trout {Salmo henshaici). 



Scotch sea trout {Salmo trutta). Introduced species. 



Loch Leven trout {Salmo trutta levenensis). Introduced species, propagated in 

 limited numbers for observation. 



Lake trout, Mackinaw trout, longe, togue {Cristivomer namaycush). 



Brook trout, speckled trout {Salvelinus fontinalis) . 



Sunapee trout {Salvelinus aureolus). 

 4789°— 14 6 



