Fig. 16. Carp Spawning Pond (Dubisch Pond) is a sxinny protected 

 location. Ditches running alongside the pond dam. The spawning 

 bed is provided with well cultivated grass growth. 



K.g. 17. Carp Eggs attached to plants from a Spaiming Pond. In 

 the eggs, the embryos and their eye spots are distinctly recogniz- 

 able. (Taken from the UFA-Culture film "Secrets of the Egg Shell" 

 vdth the author's collaboration). 



One of the greatest dangers to the eggs of carp is a sudden drop in the temperature 

 of the water. An experiment was made by placing 10 eggs in a glass and cool the water 

 down to a temperature of ^ degrees centigrade. Only 2 fish emerged from these eggs, 

 while in a control glass all 10 fish came out of 10 eggs. 



82 



