Other Salmonida. 185 



the spawn gatherers. Work under such circumstances 

 is of necessity hurriedly done, and as the fish die shortly 

 after being taken, the spawn gatherer must make haste 

 in his work. 



There is another method giving surer and better re- 

 sults, although the physical conditions are such on the 

 larger areas of water that it can be carried on in but few 

 places with any degree of success. By this method the 

 fish are impounded when taken and are held alive in 

 confinement until the eggs are ripened, when the fish 

 can be stripped, with excellent results. The require- 

 ments for such operations are a locality where fish can 

 be taken in large numbers, and a sheltered location 

 where the pounds in which the fish are held may be pro- 

 tected from the autumn gales and seas. Operations of 

 this character have been carried on for several years on 

 the Detroit River, and are substantially a& follows : 



Beginning with about the third week in October, the 

 whitefish in the upper end of Lake Erie begin a general 

 movement out of the head of the lake up the river, seek- 

 ing the spawning beds in that stream and in the lower 

 end of Lake St. Claire. Preparatory to this run the 

 fishing grounds, which are operated with seines, are put 

 in readiness for the coming of the fish. At each fishery 

 a number of crates, about 6x12 feet in size, made of 

 2|-inch strips an inch thick, are nailed to 4x4 scantling 

 uprights, one at each corner and one in the middle on 

 each side, the floor of the crates being constructed in the 

 same manner. These boards are fastened to the up- 

 rights so as to leave spaces between the boards of from 

 one to one and a half inches, to permit ? free circulation 

 of water through the crates and still pi event the escape 

 of the fish. Inside each crate is constructed a false bot- 

 tom that may be raised and lowered at will to any de- 



