DISTRIBUTION OF FISH AND FISH EGGS, 1910. 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 in 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 fingerlings, are allotted in much larger numbers as fry than as 

 fingerlings 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 supplied 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 fingerling bass may therefore equal many 

 thousand times this number of pike perch fry. 



SPECIES CULTIVATED IN 1910. 



The species cultivated by the Bureau in 1910 numbered some 50 

 fishes and the lobster. Of these the following were artificially 

 propagated : 



The catfishes (Silurid^e): 



Horned pout, bullhead, yellow cat (Ameiurus ncbulosus). 



Marbled cat (Ameiurus nebulosus marmoratus). 

 The shads and herrings (Clupeid.*:): 



Shad (Alosa sapidissima). 

 The salmons, trouts, vvhitefishes, etc. (Salmonid^e): 



Common whitefish (Coregonus albus and C. clupeaformis). 



Lake herring, cisco (Leucichthys artedi). 



Chinook salmon, king salmon, quinnat salmon (Oncorhynchus tschaivytscha) . 



Silver salmon, coho (Oncorhynchus Jcisutch \. 



Blueback salmon, redfish, sockeye (Oncorhynchus nerka). 



Humpback salmon (Oncorhynchus gorbuscha). 



Steelhead trout, hardhead (Salmo gairdneri). 



Rainbow trout (Salmo irideus). 



Atlantic salmon (Salmo salar). 



Landlocked salmon (Salmo sebago). 



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

 Colorado River trout (Salmo pleuriticus) ; Tahoe trout (Salmo henshawi). 



Loch Leven trout (Salmo trutta levensis). Introduced species, propagated in 

 limited numbers for observation. 



Lake trout, Mackinaw trout, longe, togue (Cristivomcr namaycush). 



Brook trout, speckled trout (Salvelinus fontinalis). 



Sunapee trout (Salvelinus aureolus). 

 The graylings (Thymallid^e): 



Montana grayling ( Thymallus montanus). 

 The smelts (Argentinid.se): 



American smelt (Osmerus mordax). 



