With regard to growth, the Aiachgrunder — formerly through lade of arperlments, 

 considered the best of all — ^was found to be 10 percent behind the other races. After 

 all is said, the Lusatian carp is still the fastest growing and best food assijnilating 

 fish. It is also said of it that it is especially adaptable to drainage and gives still 

 best results under unfavorable climatic conditions. The remaining three races showed, 

 in Wielenbach, practically the same growth results, for the 5 percent greater growth of 

 the Lusatian was partly equalized by the weight of the scales which amomted to 1 percent^ 

 The Lusatian remains, despite this, the most rapid grower and the best food evaluating 

 fish. It is further renowned for being particularly adaptable and having the beet snoeeSi 

 in less favorable climatic conditions. In the ponda of the Upper Harz, which are subject 

 to a cool raw climate with a mixed stock of Lusatian "scalers" and Qalician mirror carps 

 I could not detect a better growth average with the Lusatian carp. Of course, I oannot 

 restrain the in^sression that the growing of Lusatians is in bad repute because "scalers" 

 occurring frequently in the growing of Oalicians and other races are designated as 

 "Lusatian scale-carps". 



With regard to the inclination to add protein or fat in the constructive metabolisa, 

 the Lusatian surpasses the other races if stipulations for high backs are not given, or 

 is inferior to other races if these stipulations are favored. Qalician carps of three to 

 four summers in Zeissig showed about ^.27 percent higher fat content than the lusatisD 

 carps. 



The most widespread race today is the Qalician carp . The Lusatian, on account of 

 its complete scale coat disappears more and more from the market. The Franconian carp, 

 quite popular in Southern and South-western Germany has been largely supplanted by the 

 Qalician, while the Aischgrllnder is almost exclusively restricted to this local region* 



The Qalician is to be found everywhere, today, in all parts of Germany and in the 

 rest of Europe. This race is therefore the most important from the pond-industrial view- 

 point. 



Aside from the specific, but varying productive power of the different races, it can 

 be said that all well cultivated carp under normal conditions grow into good adults with- 

 in three years. They will then attain a weight of about three pounds, a weight, which 

 ordinary — so-called peasant carp — will never attain within this space of time. 



Before the war, the following weights were caasidered more or less normal for the 

 different classes of carp, according to age ; 



Yearlings.... • 50 grams 



Two years old 500 " 



Three years old 1500 " 



Four years old 2500 " 



Today, in these days of recurrent crisis, all weights have become more fluctuating. 

 In general, the following weights and sizes are now considered normal « 



Yearlings 35 grams (9 to 12 centimeters) 



Two years old 350 " ("150", so-called) 



Three years old 1250 " ("AO* , " " ) 



The fishbreeder, too, has to adapt his wares to changing times and market conditions. 

 In Java, Italy and Latvia, carp up to 500 grams are in demand. In Berlin, in 1930, carp 

 of the so-called "80" class, i.e. of 600 grams of weight were mostly in demand, while in 

 1931 carp of the so-called "30" class (larger fish) were so greatly in demand that it was 

 difficult to supply them. These changing weights are easily obtldned by proper stock 

 regulation. 



The figures here quoted apply only to ponds of medium productivity. Under less 

 favorable conditions a lower individual growth is striven for, so the density of popu- 

 lation does not get too narrow, and the feeding surface quotients are not too high, and 

 therefore the evaluation of natural food not too poor. In highly productive ponds, on 

 the other hand, higher weights may be profitably attained. 



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