334 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
It may be said, in conclusion, that with the knowledge gained of the spawning 
habits of the yellow perch the species might be hatched with success and in indefinite 
numbers by any person of care in the regions of its abundance. Nothing could be 
simpler. The operation would consist in storing the adult fish in live-boxes by the 
middle of March (latitude of Washington, D. C.) and the subsequent daily transfer 
of the eggs, laid the previous night, to separate compartments to undergo hatching. 
Beyond being water-tight and tar-coated the hatching vessels would require no further 
accessories than clean running water and a cheesecloth outlet-strainer, the latter for 
restraining the premature escape of the fry. Nor is it immoderate to say that it would 
be practicable, if desirable, for the Fish Commission to hatch 150,000,000 a year at the 
shad stations on the Potomac, Susquehanna, and Delaware at a cost below $3,000. 
Two men at either of those stations, sixty days, would amply fulfill the requirements 
in collecting the adult fish and in hatching out the eggs, while their operations with 
this species would precede, so as not to interfere with, the regular work with the 
shad. 
