of such segregation. Sampling the segre- place to sample is in the trunk river, 

 gated subpopulations to represent the such as the Kvichak River in the Kvichak 

 whole population cannot be achieved with- system, while the fish are migrating 

 out prohibitive increases in cost and upstreann before dispersing to the spawn- 

 effort, ing grounds. This cannot adequately be 



replaced with spawning ground sampling. 

 We conclude, therefore, that to deter- It must be added that trunk river sampling 

 mine the sex ratio and the size and age cannot replace spawning ground sampling 

 composition of the escapement of red either, if the objective is to study sub- 

 salmon into a lake system, the proper populations in a lake system. 



10 



GPO 899451 



