13 



TAi3LE 2 - Acute toxicity of tetrachlorocatechol to sockeye and 

 pink salmon expressed as 96-hr median tolerance lirait (96-hr TL ) 



m 



SPECIES, STAGE OF 

 DEVELOP^u:;ilT MD SOURCE 



SOClffiYE SAIl401'h 



Alevins - iiewly Hatched 



Cultus - Hatchery 

 Cultus - iMatiiral 



Alevins - Advanced 



Cultus - Hatchery 

 Cultus - Hatchery 



Fry 



Cultus - Hatchery- 

 Pitt - Incubation 

 Channel 



Smolt - Yearling 



Cultus - ilatural 



PINK SAIi-IOH; 



Alevins - Advanced 



S^^feltzer - Hatchery 

 S;;eltzer - Hatchery 



Fry 



Svjeltzer - Incubation 

 Channel 



SIZE OE TEST FISH 



Drywei^ht, mg 



Alevm body Yolk 



(9) 

 (9) 



15 

 18 



25 

 25 



(18) 

 (18) 



11 

 10 



29 

 29 



Fork 



Length 



inm 



55 

 U2 



85 



35 



TEi-iP, 

 OF 



41 

 46 



41 



49 

 49 



47 



41 



41 



46 



96-HR TL 

 n 

 ppm 



0.7 

 0.7 



1.1 

 1.3 



0.8 

 0.9 



0.8 



0.29 

 0.29 



0.26 



( ) Approxiraate values from Brannon (1965). 



