Brown Trout 



191 



frost makes them run quickly to their spawning-beds. They select a 

 place where the gravel is fairly fine and is not likely to shift. Here 



CJO 



to 



u 



c 



JU 

 rt 



5 



t/j 

 c 



CS 



Cu 



3 



o 



H 

 



"rt 



-o 

 3 



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the female digs a hole in the gravel with her tail, striking four 

 or five times, and making the water dirty. Every three or four 



