84 



1 JOHN VLASTELICIA 



2 injury or retarded development to the various waste levels. 



3 The results showed that sulfite waste liquor, 



4 even when dilute, is damaging to English sole eggs. The 



5 effects range from the ultimate damage of killing the egg 

 g to the relatively subtle damage of delaying hatching time. 



7 Significant damage was rarely seen in sulfite waste concen- 



8 trations cf 6 parts per million but always seen in 14 parts 



9 per million and this indicates some sort of a toxicity 



10 threshold of about 10 parts per million or very similar 



11 to that tor the oyster larva bioassay studies. 



12 OTHER BIOLOG IC STUDIES 



13 There were other important biological 



14 studies conducted by the Project. Studies of adult and 



15 juvenile oysters showed that oyster mortalities increased, 



16 and the growth rate and market quality decreased, with 



17 proximity to the waste source. Phytoplankton productivity 



18 studies showed a definite productivity suppression in the 



19 zone of acute pollution. Phytoplankton, as you know, 



20 produced some of the desirable dissolved oxygen content 



21 of these waters. Studies were made of the zooplankton, 



22 j the minute marine animals, of che area, and of the 



23 I periphyton, these tiny marine organisms, both plant and 



24 animal, which attach themselves to rocks and logs. Surveys 



25 were made to assess the bacteriological quality of study 



