38 



CALIFORNIA FISH AND (i.AMK 



SERIES I. FRY THAT WORKED THROUGH GRAVEL BEDS 



NO MINE SILT ADDED— USED AS CONTROL 

 BED No. 1 2 3 4 5 6 7 



SERIES II. FRY THAT WORKED THROUGH GRAVEL BEDS 



IAM7 



T7~ 



BASKET HATCH PERIOD 



T 



FF6I2 i 



ntJ7 TIME OF lP FISH THROUGH GRAVEL -^ 



KAR? 



7~T 



=E 



z 

 o 



o 

 o 

 < 



b 



TOTAL PERIOD THROUGH GRAVELc^ 

 ^>RI5 _*_ 



BED NO 1 



SERIES III. FRY THAT WORKED THROUGH GRAVEL BEDS 



JAN .1. 



BASKET HATCH PERIOD 



7 



FEB I? 



FEB.27. 



M«?3Q 



APR.15. 



\ ' .. | 



TIME.OF 1ST FISH THR0UGta6RAVEL\ \ 



i i 1 il J 



TOTAL PERIOD THROUGH GRAVEL-^ 



o 

 t 

 a 



— o 



< 



— b 



in 



BED NO 1 



Fig. 16. A composite photograph showing the fry that emerged from the 7 control 

 nests and the 14 silted nests in relation to the silting period. As explained 

 in the text, Nest 7, Series II and Nest I, Series III, should be disregarded. 



