3. The second year, the raising of two-year-old carps ► 



In the second growth year, the yearling carps (which have been wintered in special 

 hibernation ponds or in rearing ponds) are placed in rearing ponds to grow into two-year- 

 old carps. Only in a year when there is an excess of yearlings it is advisable to crowd 

 these fish (2 to 3 yearlings and more per sq. meter) so their growth remains approximately 

 stationary until the following spring. In the following year they can be used as year- 

 lings. The character of the rearing ponds is the same as that of the normal carp pond. 

 The care and management should be the same as with the masting pond. As the individual 

 losses by diseases and other accidents does not play a decisive part from now on, the 

 time has arrived for a more exact stock calculation on the basis of the local productivity. 

 Normally a stronger more regular feeding is now begun. 



In the autumn the rearing ponds are fished out and the two-year carps are placed in 

 hibernating ponds, 



^. The Third growth Year^ and rearing of market carps . 



In the maturing ponds (Jig. 20), which are constructed and managed like normal carp 

 ponds J the market carps are grown to proper size in the third year, in special cases in 

 the third and fourth year. 



The feeding and the stock density (number of fish) must be regulated in the third and 

 fourth years even more than in the second year, as the final size and quality of the market 

 fishes depend upon these factors. Both size and quality must correspond to market require- 

 ments, and in the interest of good saleability there must not be too much variation. 



Fig. 20. 22-acre Carp Maturing Pond in the Lueneberg Heath, in the 

 spring shortly after being filled with water. View from the water 

 inletj strong formation of earth and water channels on account of 

 flat draining ground in the upper pond. 



Since the selection of the spawning carps and their further rearing has already 

 been discussed, it is not necessary at this point to again detail the rearing of spawn 

 carps. 



88 



