134 



Roosevelt Wild Life Bulletin 



Table 4. — Showing the ohserued effects of copper sulphate on fish. (Amount 

 of copper sulphate expressed in parts per million.) 



Kind of Fish 



Concen- 1 



tration of 



CuS0 4 



ESect 



References 





.60 



-30 



2.10 



10.00 



5-00 



-30 



-34 



.40 



• SO 



.60 



-75 



1.42 



12.00 



-30 



.40 



.50 



■ 50 

 1. 00 



.12 



.40 



12.00 



30.00 



30.00 



12.00 



• 30 



.60 



■ 30 

 .60 



1.20 



.14 



1 .00 



2.00 



.30 



.60-. 80 



1. 00 



2.00 



.60-. 80 



.60-. 80 



■30 



Killed 



Joiu-. N. E. W. W. Assn. ('05) . 





Killed 



Qloore, Jackson, Goodnough '05) 



Black bass ("small) 



None killed 



Killed 



Kellerman ('12) _ 



Large-mouth black bass. . . . 



Carp 



Catfish 



None killed 



None kiUed 



Killed 



Marsh and Robinson ('loj 



KeUerman ('12) 



Jour. N. E. VT. /W. Assn. ('05) 



Catfish 



None killed 



None kiUed 



Killed 



Goldfish 





Perch 



Jour. N, E. W. W. Assn. ('05) 



Perch 



None killed 



Few killed 



Killed 



Perch 



Goodnough ('05) 

 Titcomb ('12) 





Perch fvellow) 



None killed 



Killed 





Perch fyellow) 







None killed 



Killed ... 











KiUed 



Marsh and Robinson C'lo) 

 Jour. N. E. W. W. Assn. ('05) 





Few killed 



None killed 



KiUed 



Pickerel 





Titcomb ('14) 



Pickerel 



KiUed .. 



Titcomb ('14) 

 Titcomb ('14) 

 Titcomb C'14) 



Pike 



KiUed ... . 





KiUed 





None kUled 



KiUed 



Kellerman ('12) 

 Jour. N. E. "VT. W. Assn. ('05) 

 Jour. N. E. VT. VT. Assn. ('05) 

 Caird ('04) 







KiUed 





KiUed 





None kiUed 



None kiUed 



None kiUed 



None kiUed 



None kiUed 



None kiUed 



None kiUed 



KiUed 



Trout 





Trout 



Anonymous ('04) 





Trout (brook) 



Marsh and Robinson ('10) 



Trout (brook) 



Trout (brook) (fry) 



Trout (brook) (fry) 



Marsh and Robinson Cio) 





None kiUed 



None kiUed 



None kiUed 



Marsh and Robinson ('10) 













When there is any doubt concerning the toxic effect of copper 

 sulphate the method of ]\Iarsh and Robinson ToS) may be used. 

 The U. S. Bureau of Fisheries gives the following directions: 



" Each body of water must be treated in the light of its special con ■ 

 ditions. It is advisable to conduct a preliminary experiment on the 

 effect of various dilutions of the copper sulphate upon the fish in the 

 water to be treated. For this purpose two vessels of sufficient size to 

 hold a few of the fish for 24 hours without artificial aeration are 

 placed side by side. Both of the vessels should be filled with water of 

 the same temperature as that of the water from which the fish are 

 taken. To the water in one of the vessels add sufficient copper 

 sulphate to make a solution containing i part of the salt to a million 

 parts of water. The copper sulphate is conveniently added to the 

 water in the form of an aqueous solution of known strength (stand- 

 ard solution) which may be made up in the following manner : Weigh 

 out 20 grains of crystalline copper sulphate, flf facilities for weigh- 

 ing are lacking, the chemical may be weighed at a drug store) . Com- 

 pletely dissolve this amount of salt in one quart of water. Of this 

 standard solution add one fluid ounce to every 10 gallons of water, 

 which are contained in the treating vessel. After stirring the solu- 

 tions vigorously to aerate the water, place an equal number of fish in 



