[21 J ARTIFICIAL FEEDING OF CARP. 1029 



to 700, and iu tbe fourth from 900 to 1,000, I think (at least my expe- 

 rience teaches me this) that one would go too tiir. In spite of this, how- 

 ever, we have very distinctly divided classes of lish before us, which at 

 once suggest a six years' period. 



If a four years' period is aimed at, with a final weight of 1,l'50 grams, 

 the weights — all other conditions being the same — will be as follows: 

 274 grams at the end of the first year of growth, (340 at the end of the 

 second, and 1,250 at the end of the last year. 



As it can hardly be expected that those carp which do not have the 

 u)inimum weight of GOO grams will in the sale-pond reach the final 

 weight in a single year, all fish having less than 600 grams must, in 

 the four years' period, be placed in the growing-ponds. The stock on 

 hand for the sale-ponds is only 12,514 fish, whilst it should be 12,700. 



In the growing-ponds of Class II no carp should be placed which do 

 not weigh at least 0.250 kilogram a piece. Of those weighing from 

 0.240 to 0.4C7 kilogram there are on hand 9,541 which will certainly 

 reach a minimum weight of O.GOO kilogram for the next year's stock for 

 the sale-ponds. The number aimed at is 12,700. In order to reach this 

 number we must, therefore, endeavor to bring 3,159 of the lighter carp 

 u]) to 0.040, or at least 0.600, kilogram, which will not be very difficult 

 to accomplish. 



In order to raise the stock of the sale-ponds to the required number, 

 12,700, it will be necessary, as has already been stated, to raise the 

 required number of carp weighing 0.467 kilogram by artificial feeding 

 to the final weight. There will then still be 3,358 fish, varying in weight 

 from 0.43 to 0.181 kilogram. The best plan will be to sell them ; un- 

 fortunately there will not be many customers for such light weights. 

 In the case before us a very large number, however, may be used to 

 supply voids in some of the ponds. If there are ponds at some distance, 

 or if a summer-course has been included in the system, these extra fish 

 can, in some outside ponds, by feeding, be raised to the weight of the 

 other fish. It would not do to place them in the growing-ponds, as 

 fish placed in these ponds should have the same normal weight as the 

 stock of such ponds. 



If one has no ponds of one kind or the other at one's disposal, all 

 that can be done is to overstock a suitable area of the growing-ponds 

 of Class 1 and Class II, in order to obtain ponds for raising these extra 

 lish, and to neutralize this overstocking by artificial feeding. If the 

 transition from one period to the other is to be hurried it will be 

 l)etter not to use any artificial food at all than to feed artificially in 

 the wrong place. In the case in question several thousand young fry 

 have, by feeding, in one year been raised to a weight- of 0.500 kilogram, 

 and the feeding of the heavier fish has been omitted in order to ewter 

 the new period as soon as possible. Thereby the perfecting of the 

 transition is considerably delayed. 



If, instead of aiming at 0.500 kilogram, the feeding had only aimed 



