■ The increased sediment load in the water column may stress filter 

 feeders through tissue abrasion, clogging of filter apparatus and 

 decreased larval settling. There may also be indirect effects through 

 changes in the substrate itself. 



DISCUSSION 



Bothner asked if the sled is remotely controlled. The answer is no; it 

 takes a picture e\/ery 15 seconds. There is too much tendency for an operator 

 to introduce bias by increasing coverage where the fauna is abundant. 



66 



