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FOR THE MONTH OF NOVEMBER 1947.
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SUMMARY OF OPERATIONS ON CONTRACT NO. W-28-09
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The basic program of the Applied Fisheries Laboratory, ofymeasuring,
the effect of X-rays upon aquatic organisms, again shared the aftcrte6?
the staff, with the completion of the preliminary evaluation of the Bikini
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#Sections I and IT.
Early in November two more marked control male chinook salmon were
recaptured, making a total of 38 irradiated- and control-stock chinocks retaken in 1947.
Hight control and seven irradiated egg lots were obtained.
One control egs lot (#13) and one egg lot (#14) from irradiated stock wera
recognized at the time of spuming as consisting of poor egrs that would
have been discarded in ordinary hatchery procedure.
By December 2, 1947, almost
complete mortality had been suffered by both of these egg lots,
When these two
egg lots are eliminated from consideration, the percentage mortality of egg
lots from irradiated stock (16%) is significantly (1%$-2% level) greater than
that of the controls (3%), the value of "t" being 3.0 for 11 degrees of
freedon.
These eggs will hatch during December and additional data will be available.
We are making a detailed study of thecegree of development of all the embryos
that die before hatching. ‘Detailed studies will also be made of all] malformed
ab
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Sections IIT and IV.
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Observations have continued at SiTtisLake,B. C. Canada,
where the
entire run of salmon is being checked for the presence of marked fish. In the
* Section numbers refer to the Project chronology Chart, revised Jamuary 9, 1947.
DOS ARCHIVES