202 



FISHERY BULLETIN OF THE FISH AM) WILDLIFE SERVICE 



of the season, the probability of being tagged, 

 judged from Ta/nia- was fau'ly even over most of 

 the season. In consequence, the estimate from 

 the simple formula (1) 



(10,472) (2,351)^ 345 



520 'i^'rito 



is practically identical with the estimate from 

 formula 25 (or 32). 



T = 1000 

 71-2 000 



.17 

 .16 

 .15 

 .14 

 .13 

 .12 

 .1 I 

 .10 

 .09 



Q..07 



u. 

 O.06 



(ii 



o 



05 



.04 



.03 



.02 



.01 



.00 



^. 



Z. 



/. 



^ 



7 



y 



7 



/ 



/ 



/ 



J. 



^ 



T 



-6 



z 



-7 



^ 



-9 



10 



-II 

 -12 



-15 



20 



-25 



-30 



o 

 o 

 o 



is. 



o 



-J 

 < 

 o 

 en 



■40 



-60 

 _80 

 ■100 

 200 



.00 01 .02 .03 .04 .05 .06 .07 .08 .09 .10 .11 .12 .13 .14 .15 

 SCALE OF P* = ^ 



Confidence limits on .sample tag ratios and on estimated population numbers, at a confidence level of 95 percent, 

 experiments involving 1,000 tagged individuals and samples of 2,000. 



for 



