214 



1 EUGENE P. HAYDU 



2 are self-explanatory. It will be noted, however, that 



3 emphasis is given to economically important species in 



4 the area and to indigenous forms. It is also indicated 



5 that if substitute animals are used, their relative sen- 

 g sitivities and those of economically important species 



^ roust be established. Emphasis is also given to the 



g diversity of species and their differing reaction to 



g toxicants and hence to the unapplicability of using a 



single value or concentration that would be safe for all. 

 Applications of the oyster larval test as 

 suggested in the FWPCA report are hardly valid under these 

 considerations. As a matter of fact, such attempts are 



10 

 11 

 12 

 13 



14 contrary to some of the basic recommendations cited above 



15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 



In this context, it is difficult, for example, to see the 

 relevancy of the oyster larval test to Port Gardner Bay 

 in view of the fact that oysters are neither an economically 

 important species in this area, nor are they indigenous. 

 In fact, there are no oysters here. On the other hand, 

 there are a number of economically important species in 

 Port Gardner Bay which have been studied in the laboratory 

 and in the field to determine the effects of sulfite waste 

 liquor on their productivity. These r.esults are directly 

 applicable to the problem at hand and will be reported 

 upon in soooe of the later statements. 



