!;■ 



1980 



-» ( 1) 



.-", 30 '. 10 15 2 >". 10 s 10 15 ro 



March April May 



0) 



E 

 o 



fi . 



(77) 



1979 



(2) 



?. 



25 30 5 10 15 20 25 30 5 10 15 20 

 March April May 



1978 



?; 3'0 3 10 15 ^0 25 30 5 10 15 20 

 March April May 



£ 



6 



a> 



O 

 tn 



«> 

 Ji 



E 



Z 



1977 



---? ( 6) 



■' I 1 ■■""! " ■■ I T 1 I I I „ i , 



25 30 5 10 15 .20 25 30 5 10 15 20 

 March April May 



25 



?n 

 I '. 



1 II 



1976 



2*5 3'0 i' I'O 15 ?i) 2*5 3 i I'O 1^ 2 

 March April Hay 



Figure 5 , 



Number of sauger captured per kilometer while 

 electrof ishing the Powder River near its mouth, 

 1976-19B0. The maximum number of fish sampled on 

 one day is in parentheses. 



22 



