181 



on salmonlds. 



Mathoda: R«plicate 1983-86 prey abundance studies 

 using identical gear and aethodologies at the sane 

 sauopla locations. The prey abundeuice study used a 

 30.5 X 2.4 m bag seine with 6.4-inia knotless nylon 

 mesh (Falser et al, 1986). They sampled at six 

 general locations (John Day forebay, Arlington, 

 Irrigon, McNary tailrace, and in two backwaters — 

 Paterson and Plymouth sloughs) . At each location, 

 four nighttime hauls were made during each sampling 

 period. samples were collected from April to 

 September. Some 1995 locations may change slightly 

 due to pool level operations. However, we will 

 attempt to sample similar habitat types within the 

 immediate area of the former site. Environmental 

 data on variables such as substrate, vegetation, 

 temperature, and turbidity will be collected 

 concurrent with fish sampling. Additional data on 

 dam operations can be obtained after sample 

 collection. 



Products: Community- level information for fishes 

 in shallow littoral habitats of John Day Reservoir. 



Schedule: April through August 199 5. 

 10 



