of the Fishery Board for Scotland. 



69 



vide a basis for calculating this temporary increment, and for the present 

 purpose it has roughly been assumed at three per cent, of the total length of 

 the fish. With this deduction from the recorded measurement of males, 

 some changes are made in the proportion of the sexes in the first three 

 length-groups given above, but the fourth and fifth happen to be 

 unaffected. 



The figures, thus corrected, are as follows : — 



Group. 



Lengtn. 



Number. 



Percentage. 



Remarks, 



M. 



F. 



Total. 



M. 



F. 



1 



26 inches and under, 



17 



58 



75 



23- 



77- 



Chiefly Females. 



2 



26^ to 27 inches, - 



20 



16 



36 



56- 



44* 



Mixed Sexes. 



3 



211 to inches, - 



41 



9 



50 



82- 



18- 



Chiefly Males. 







78 



83 



161 



48-5 



51-5 





4 



1 



32 to 37 inches. 



4 



54 



58 



7" 



93- 



Chiefly Females. 



5 



37^ inches and over, 



19 



6 



25 



76- 



24- 



Chiefly Males. 







101 



143 



244 



41-4 



58'6 





Till further information is obtained regarding the proportion of the 

 sexes in fish of different lengths, it seems inadvisable to do more than 

 point out the facts as observed in the case of a somewhat limited number 

 of the autumn run of fish. It may, however, be mentioned that the pro- 

 portions of the sexes in spring fish, caught by rod on the higher reaches 

 of the Tay, fairly agree with the figures in the fourth and fifth groups. 



The average weights of these unspawned salmon and grilse, corres- 

 ponding to the various lengths, is given below, except in the dimensions 

 in which the numbers of iish seemed too limited : — 



G 



[Ta ni-E. 



