12 



ETON NATURE-STUDY 



small hatchery can be placed in a sink. Do not crowd the eggs 

 together ; in fact, they should not touch one another. As soon as 



an egg is dead, and some are sure to die, it 

 should be removed. A dead egg is at once 

 recognised by its dull pale-white colour. 

 As soon as two black dots appear (see 

 figure 149), the eyes of the future fish, 

 the chief danger of the egg dying is past. 

 The temperature should not be above 50 



FIGURE 147. A Trout egg. ^ , , . / A /\ r^o i ,1 i ,\ ,1 



Fahrenheit (40 to 50 being the best), the 



fish which takes the longest time to hatch out being always the 

 strongest. The exact moment of hatching should be carefully looked 



for (see figure 150), 

 sorption of the food- 

 from day to day. 

 appeared the young 

 out of the boxes, 

 sufficient for a given 



and the gradual ab- 

 bag should be noted 

 After this has dis- 

 fish should be taken 

 since water which is 

 number of eggs will 

 same number of young 



not be enough for the 



fish when they come FIGURE us. A Trout egg out. They will want 



feeding, and for this faintly "eyed." purpose the fresh roe 



of any small fish will do, such as that of a sole or whiting, which 



can easily be got from a fishmonger.* ^^^^^ 



The great thing to avoid is giving the fish j^ 



more than they can eat. Any remnant of 



uneaten food should be removed. The 



* Other foods have of late years superseded fish 

 roe. A list of these, of eggs, and apparatus, may be 

 obtained from The Manager, Earl Denbigh Fisheries, 

 Holy well, North Wales. 



FIGURE 149. A Trout egg 

 fully "eyed." 



