continuously wiped clean vdth brushwood, or, after previously closing the pond, a second 

 sieve is alternated, cleaned, etc. 



Durr'n;;^ night hours, a watch niust be kept for regulating the outflow and to guard 

 against fish thefts. There are tv/o possibilities in the actual taking out of fishes 

 from the drained pond: "Transmission" of the fishes through the sluice into a catching 

 box outside of the pond, or taking them out of the pond in front of the sluice. 



Fig. 53. Sieve booc for fishing out smaller and more 

 sensitive fishes. Fastening to the outflow pipe of the 

 sluice with the help of a sack hose. 



The former method should be absolutely applied with all smaller fishes and with 

 sensitive fish species swimming freely about and Tshich would become hopelessly choked 

 in the mud accuimilations in front of the sluice. At the outlet of the sluice outside 

 of the pond (Fig. 53) a sieve box is attached by means of a sack hose 2 meters (65 ft.) 

 long (made from sugar sacks, Eckstein, 1929). The sack hose must hand loose so that the 

 fishes and also partly the mud toward the end of the fishing out, can remain behind in 

 it. The bottom and sides of the hose are fastened tightly about the sluice outlet. On 

 the sides it is nailed to strips and on top it is gathered together and is to be fasten- 

 ed by a large nail. All nails are onl;'- partly hammered in, so that they can be o.uickly 

 removed. At the fish-out box, the sack hose is securely nailed. The sieve box itself 

 is so placed in the outflow ditch outside of the pond, that v^hen the water current is 

 shut off, all water can flow off. The fishes at first come v/ith the freely released 

 water and vdthout all the mud into the sieve box. The vfater flows only gradually from 

 the sieve box so that the fishes are not injured; also many remain behind in the hose 

 and are driven out from time to time by lifting the hose. All fishes are to be removed 

 immediately from the box. Mostly toward the end of the fishing out, some mud comes into 

 the box. It is then continually removed by hand. 



All trout, especially also larger carp brood grown in carp nursery and extension 

 ponds (Fir;. 19), yearling carps, stock tenches of every size, perch-pike and marane 

 fingerlings can in this way be conveniently and cleanly let into the Eckstein fish- 

 out sieve box v/ith the outflowing v;ater through the sluice. If too many fishes come 

 at the same tine or if the box has to be cleansed of foliage, mud, etc., the outflow 

 is interrupted for a moment until the box is again ft-ee. Y^ith large ponds it pays to 

 build in firm fish-out boxes. 



175 



