DURING THE FISCAL YEAR 1907. 7 



Eggs are distributed only to state hatcheries or to applicants who 

 have hatchery facilities. 



The varying usage in the classification of young fish as to size has 

 caused such confusion and difficulty that the Bureau has adopted 

 uniform definitions, as follows: 



Frt/=fi8h up to the time the yolk sac is absorbed and feeding begins. 



Advanced fry — Ush from the end of the fry period until they have reached a length 

 of 1 inch. 



Fingerlinys=iish. between the length of 1 inch and the yearling stage, the various 

 sizes to be designated as follows: No. 1, a fish 1 inch in length and up to 2 inches; 

 No. 2, a fish 2 inches in length and up to 3 inches; No. 3, a fish 3 inches in length and 

 up to 4 inches, etc. 



Yearlings=fish that are 1 year old, but less than 2 years old from the date of hatch- 

 ing; these may be designated No. 1, No. 2, No. 3, etc., after the plan prescribed for 

 fingerlings. 



SPECIES CULTIVATED IN 1907. 



The following full list of species that the Bureau was concerned 

 with in 1907 includes some 50 fishes and the lobster. Except as 

 otherwise indicated by footnotes, all w^ere artificially propagated. 



The catfishes (Silurid.e): 



a Spotted cat, blue cat, channel cat {Ictalurus punctatus). 

 « Horned pout, bullhead, yellow cat {Ameiurus 7iebulosus). 

 Marbled cat {Ameiurus nebulosus marmoratus). 



The minnows and carps (Cyprinid.e): 

 ^ Carp (Cyprinus carpio). 

 c Goldfish {Carassius auratus). 



c Tench {Tinea tinea). Cultivated varieties, green tench and golden tench. 

 c Ide {Leuciscus idus). Cultivated variety, golden ide. 



The shads and herrings (Clupeid^): 



Shad {Alosa sapidissima). 

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



Common whitefish {Coregonus clupeiformis) . 



Lake herring, cisco {Argyrosomus artedi). 



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



Silver salmon, coho {Oncorhynchus kisutch). 



Blueback salmon, red-fish, sockeye {Oncorhynchus nerka). 



Humpback salmon {Oncorliynchus gorbuscha). 



Steelhead, hardhead {Salmo gairdneri). 



Rainbow trout {Salmo irideus). 



Atlantic salmon {Salmo solar). 



Landlocked salmon {Salmo sebago). 



Yellowstone Lake trout, cut-throat trout, black-spotted trout {Salmo leuisi). 



Colorado River trout, blackspotted trout {Salmo pleuriticus) . 



Golden trout {Salmo roosvelti). 



a Artificially propagated and also collected. 



^ Propagated principally as food for other fishes. 



c Introduced species, propagated for ornamental purposes (not distributed). 



