536 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [4] 
I begin to:select my future breeders among the one-year-old fish, and 
continue to select some from the two-year-old fish, as well as from those 
which have reached a marketable age, 3 years, so as to have on hand 
a considerable number of breeders from among which I then select 
the best. 
Following Dubisch’s method, I only place one spawner and two milt- 
ers in one and the same pond. These are fully able to supply my demand 
for young fish, which at present amounts to 60,000, for stocking the 
original Kaniéw ponds and those I have rented from Prince Pless. 
It is not necessary, but even injurious, to place a larger number of 
breeders in one pond, because they are apt to produce too large a num- 
ber of young fish, which might suffer from want of food; and if carp 
are to grow rapidly, it is very essential that the growth of the young 
fish should be favored as much as possible by supplying them with 
ample food, which can be done even without having recourse to artifi- 
cial food; so that by merely furnishing a sufficient supply of natural 
food one can, during the first summer, obtain fish 5, 8, and even, in ex- 
ceptional cases, 10 inches. With these young fish I stock my ponds for 
young fish during the second summer, allowing 240 to 360 per acre 
(about 420 to 630 per hectare) according to the size of the fish and the 
nature of the pond. In this manner I obtain carp weighing 4 to ? kilo- 
gram, and even reaching in some cases the weight of 1 kilogram. Of 
these I place 90 to 120 in the main ponds during the third summer, and 
thus obtain carp weighing 1 to 2 kilograms a piece, when ready for 
market. . 
T have not always been able to supply the necessary number of carp 
for raising, and as there are no spare ponds for young fish near Kaniow, 
and as unfortunate accidents will sometimes oceur, even in the best 
piscicultural establishments, I have repeatedly been obliged to supply 
the places of the lacking fish by placing selected fry of unusually large 
size in the main ponds, and in these cases I have invariably obtained 
fish weighing about 1 kilogram each and having particularly fine and 
tender flesh. I have also observed that young fry, which have grown 
rapidly, will continue to grow fast till they are ready for. the market, 
and actually grow faster than young fish of the same age which have 
been somewhat retarded in their growth; but that the latter, although 
of equal size, will weigh heavier, when they have reached a marketable 
age, than fish raised from young fry, because their flesh has a greater 
consistency. 
It should therefore be the aim to accelerate the growth of the fry 
and the young fish as much as possible, because fish which have grown 
rapidly are apt to continue this rapid growth; and it would be very 
bad policy to be stingy with the extent of water allowed for the raising 
of fish, because the final result will amply compensate for this. 
As regards the stocking of the main ponds, it is an old experience 
that in stecking a certain extent of water with a small number of fish, 
