247 



1 ERNEST 0. SALO 



2 cycles of any two parameters. 



3 Associated with this water quality work we 



4 have been working on the mortalities of young salmon in two 



5 sections of the Green River, the first extending from the 



6 Green River Hatchery to the Renton site and the second from 



7 the Renton site to Harbor Island. Because of the--now , 

 g this is important--because of the difficulty of direct 



9 observation, the only practicable means of estimating these 



10 mortalities is from recapture in the bay of marked fish 



11 released at each of three locations. The locations are 



12 the Soos Creek Hatchery, the Renton site and the Harbor 



13 Island site. 



14 I will forego and spare you the details of 



15 the experiment, the problems of sampling with a tow net, 

 Ig the non-random distribution of fish and the description 



of the migration paths of the fish. The results of this 

 year's and last year's work are being published as student 



19 theses. But I would like to say that we do have the 



20 computer programs for the continuous analyses of the tele- 



21 metered data well under way, and estimates of the mor- 



22 tality rate of young salmon and their migration paths are 



23 available. Meanwhile, in order to impress upon you the 



24 magnitude of the project, the following summary on the 



25 numbers of fish marked and recaptured is included: 



17 



18 



