Alders round rearing ponds, [32]
at water side, importance 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, importance of, [7]
development of, [9]
Arrangement of rearing boxes, [34]
Artificial spawning of salmon, [83]-4
Asellus aquaticus, [65]