Table 1. --Limits of tolerance of fingerling channel catfidi exposed to some 



chemicals used in fish management and in agriculture. Continued. 



Chemical 



Terapera- 

 ture (C°) 



Lethal 

 dose 



Lethal doses in p.p. 

 12 4 



at various exposure time in hours 

 8 24 48 72 96 



Sodium 25° 



pent achloro phenol ate 

 (by volume) 



LD 

 LDr 



50 



>10.0 >10.0 >10.0 >10.0 >10.0 >10.0 >10.0 



5.4 1.5 0.86 0.46 0.46 0.46 0.46 



2.5 0.63 0.63 0.25 0.25 0.25 0.25 



Sulfotepp 



19" 



LD, 



LD 



LD, 



50 



>10.0 >10.0 />10.0 4.0 1.8 1.8 <.1.0 \1.0 



>io.o <i.o <:i.o <1.0 <^1.0 <1.0 <1.0 <1.0 



7.6 <1.0 ^1.0 <1.0 <1.0 <1.0 <1.0 <1,0 



TAG 10% solution 20° 



LD 

 LD 



100 



so 



LDr 



>40.0 16.9 



>40.0 8,3 



)A0.0 3.0 



5.3 

 2.7 

 1,3 



4,0 

 2,3 

 1.3 



2.3 

 1.5 

 0,95 



1.3 



0.78 

 0.40 



1.3 0.95 



0.60 0.58 



0.40 0.40 



TCA 90% 



20° 



LD 100 

 LD, 



'50 



LD, 



>2000 >2000 >2000 ■>2000 ^2000 >2000 y2000 ^2000 

 >2000 >2000 ;?2000 ^2000 >2000 -•'2000 >-2000 7.2000 

 >2000 >2000 >2000 ?'2000 >2000 ;>2000 ;»2000 >2000 



Tepp 



Thiram 



Toxaphene 

 (by volume) 



Trypaf lavine 

 (acrif lavine 

 hydrochloride) 



Versene acid 



Versenol iron 

 chelate 



Zerlate * 



Zinc disodium 

 versenate 



19° 



19° 



20° 



20° 



25° 



19° 



19° 



26° 



20/ At 5 houis. 

 217 At 57 houis. 

 22/ At 14 houis. 



