154 FISH CULTUEE 



batH, and perhaps tEe number in eacE trougE 

 be reduced. In fact, after the fisE Eave been 

 feeding well, tEere sEould be a tEinning out be- 

 fore any sign of disease or undue uneasiness 

 develops. A trougE filled witE fry will be 

 greatly overcrowded by advanced fry after ai 

 fortnigEt. TEe extent of tEe tEinning will de- 

 pend of course on tEe number of fry tEat were 

 first put in tEe trougEs. TEis must be left 

 wEolly to tEe judgment or experience of tEe 

 fisE-culturist. It migEt be said tEat wEere close 

 attention is paid to tEe EealtE of tEe advanced 

 fry a mucE larger number can be carried in a 

 trougE tEan some people suppose. 



Not many years ago tEe average fisE-culturist 

 would Eesitate to carry more tEan 15,000 ad- 

 vanced fry in a trougE in wEicE tEe same man 

 to-day would not Eesitate to carry over 30,000, 

 or if driven to it, 40,000, and bring tEem tErougE 

 successfully. WEile tEis is true, it is not ad- 

 visable to carry more tEan 15,000 or 20,000 

 advanced fry ia a twelve-foot trougE, nor is it 

 advisable to go far below tEe smaller number 

 mentioned, beca,use tEere is less likeliEood of 

 all tEe food tEat is given out being devoured, 



