INDEX 



Advantages of rainbow 



trout 72-5 



Air bubble in yolk sac, 40 

 Alders round rearing ponds, 



32 



at water side, import- 

 ance of, 19 

 Alevins, 39-41 



diseases of, 40-1 

 Alpine char, 78 

 American brook trout, 15 

 rearing of, 75-6 

 spawning of, 76 

 Aquatic creatures, serving 

 as food for fish, 10-2, 

 62-6 

 Aquatic plants suitable for 



deep water, 13 

 suitable for margins, 13 

 Aquatic vegetation, import- 

 ance of, 7 

 development of, 9 

 Arrangement of rearing 

 boxes, 34 



Artificial spawning of sal- 

 mon, 83-4 

 Asellus aquaticus, 65 



Black spotted trout of the 



Rocky Mountains, 



76-8 



Blue swelling, 41 

 Breeding char, difficulties 



in, 78-80 



Breeding. (See Rearing.) 

 Brown trout, suitable water 



for, 14 



Bullrushes, 13 

 Byssus, 37-8 



Caddis-worms, 61-3 



in hatching trays, 38-9 

 Carp, suitable water for, 18 

 Char, 16, 78-60 



Alpine, 78 



difficulties in breeding, 

 7&-80 



hatching out of, 78-9 



97 



