MODIFICATION OF THE BEHAVIOR OF FISHES 



The results of the experiments on each species were tabulated 

 for the purposes of this paper as shown for the river chub in 

 table 1, and for the golden shiner in table 2. 



TABLE 1 



Showing the varying speeds of the modification of the behavior of the river 

 chub {Hybopsis kentuckiensis Raf, habitat, small, clear streams) associated with 

 different kinds of modified water. The ratings given in column 3 represent degree 

 of avoidance of the kind of water given first in column 2. The ratings were ob- 

 tained by averaging per cent of time in the two halves and turnings from the two 

 halves. The rating is 100 when all turnings were from one-half and all the time 

 was spent in the opposite half, and when time and turnings were equally divided 

 between halves. These figures are taken directly from table 20, p. 256 of the pre- 

 ceding paper (of which see pp. 254-57 for further details*). The control rating for 

 the species is +0 based upon eleven controls. 



* Corrections on p. 255 lines 12 and 13 for "tap water or water nearest like that 

 in which they had been kept" read, more modified water. 



