FUR SEALS AND OTHER LIFE, PRIBILOF ISLANDS, I914. 



83 



Table No. 6. — Comparison of results of present law, and of a reserving system based on an estimated mean 



rate of increase of cows — Contitiued. 



Retnarks: Approximate annual rate of increase of reserve, 8 per cent. Total revenue tinder the law, $6,232,135. 

 under the estimate. $8,941,025. Total prospective loss of revenue. $2,708,890. 



Total revenue 



Table No. 7. — Bulls provided by law in excess of requirements of 'maximum, minimum, and mean estimates 



of cows. 



o Deficiencies. These will exist in 1915 under any circumstances and merely indicate the possible extent to which 5-year-olds 

 might participate in the breeding. 



Tables Nos. i, 2, and 3 give minimum, maximum, and mean estimates of cows from 

 1914 to 1926, using as a basis the actual number of cows and pups found in 1914 and pro- 

 gressively applying a very high death rate for the minimum estimate, a low rate for the 

 maximum, and striking an approximate average for the mean between the ma.ximum 

 and the minimum. Table No. 4 shows primarily the number of young male seals which 

 would be present from 1914 to 1926 under a high death rate and a slow increase of 

 breeding cows. The number of bulls which would result from the operation of the law 

 of 191 2 is then obtained by making allowances for food killings of 4,500 three-year-olds 

 per annum until 191 7 and for reser\'es of 5,000 per annum thereafter. 



Table No. 5 shows the total number of bulls which would be necessary to provide 

 I bull to 35 cows under the various estimates. Thus, under the minimum estimate 

 there would be a total of 123,473 cows in 1916. Dividing this by 35 gives 3,528, the 

 number of bulls to be required in that year. After obtaining the number of bulls required 

 for each year, the increment from yef r to year is obtained by allowing for deaths of 14 



