ty | tmaniieia, a AO RGSS SUMMARY OF OPERATIONS OM CONTRACT WO. W-28-094~eng-33 FOR THE MONTH OF DECEMBER 1946 Work continued on all. phases of our project with the collection of , data for report writing receiving the major effort. Ie \e | E 7 i Applied Fisheries Laboratory at the University of Washington 1. - i- : The basio program of measuring the effects of the exposure of aay aquatic. organism in various sages of development to I-rays contimad. ° Ess +Sections I and II oc Not Authorized for Public Retease By Date. data on the return of irradiated fish from the sea and the analysis of One additional spawning male chinook salmon was recovered during the month in the Samish River. This recovery brings the total spammers recovered to twenty three. These fish were produced by parents that were exposed to Ierays (100 r), prior to spawning in October of 1943, or from "control" fish. Four of the fish recovered were females from which the y eggs were removed and fertilized with sperm from a male leo 8 | chinook with a similar history of treatment. aluetetd of eggs recsived are being incubated and data are being gathered s\sseeeted on the different mortalities, development, etc. From fer- geecebeee tilization to the "eyed" stage the eggs produced from the progeny OF ENE myo - The four lots | ‘of the 100 r parents have experienced a moh higher mortality SINGLE REVIEW AUT 0!EPART MENT than those from the "controls". Section TIT and IV The ran of adult sockeye salmon entering Cultus Lake, BCé has been continuously inspected.for marked fish, It was thought that some of the marked fingerling fish released into the lake, #Section numbers refer to the Project Chronology Chart, revised Jamary 2, 1946. atytn nestmahBe oe —