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fertilized eggs incubated in a hatchery. The first 

 method of raising them offers the most promise of 

 success to the beginner; in the second situation many- 

 difficulties have been encountered which require skill 

 and patience to overcome. The study of the creek chub 

 has led to the development of methods of propagation, 

 but it must be understood that these methods have not 

 been thoroughly tested and are, undoubtedly, subject to 

 many improvements. 



PREPARATION OF A SPAWNING RACEWAY 



The general layout of an area for the culture of 

 creek chubs consists of a stream emptying into a pool. 

 The stream provides the spawning space, and the pool 

 acts as a refuge area for the breeders during the 

 spawning season and later as a collecting basin or a 

 rearing pond for the newly hatched fry. In Ohio a 

 successful racewayprepared for the propagation of creek 

 chubs consis+ed simply of a gravel-bottomed stream and 

 base pool confined within the basin of a pond covering 

 an area 143 feet long, 13 feet wide, and from 1 to 3 

 feet deep. Starting at the inlet, the upper 24 feet of 

 the pond were filled with fine soil to create a steeper 

 slope, upon which a meandering channel ( 27 feet long, 

 27 inches wide, and 2 to 10 inches deep) was prepared. 

 At places in the dirt fill where there was apt to be 

 some washing by current action, heavy reinforcing 

 material was used. The channel (bank and bottom) was 

 covered with a heavy layer of gravel. Water supplied 

 by an 8-inch inlet passed down the stream channel and 

 into the base pool below, which was formed by impounding 

 the water inthe remaining portion of the original pond 

 basin. 



In Michigan a creek-chub spawning racewayprepared 

 and successfully used was also built within the basin 

 of a pond and likewise consisted of a stream and base 

 pool. However, the design of the stream was radically 

 different from that used in Ohio. The sequence of the 

 Michigan construction was as follows: (1) the excavation 

 of a main channel; (2) installation of refuge zones at 

 25-foot intervals along the stream; (3) surfacing of 

 the entire raceway with gravel; (4) installation of 

 splash boards (check dams) at 25-foot intervals; (5) 

 regulating the stream flow, the height of the splash 

 boards, and the water level of the base pool; (6) plac- 

 ing covers over the refuge pits; and (7) erection of 



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