16
suitable water for, 17

Great water moss, 13

Hatchery, suitable spot for, 21-6

Hatching out char, 78-9
ova of coarse fish, 91-2

Hatching trays, arrangement of, 34
caddis-worms in, 38-9
construction of, 32
placing ova in, 34-6
removal of, 42-3
shrimps in, 36

Herons, 60-1

_Hydrophilus piceus_, 59-60

Important points in rearing young trout, 56-7

Inlet to rearing ponds, 29-30

King carp, suitable water for, 18

Kingfisher, 49, 53, 60

Lake Tahoe trout, 77

Lakewort, 13

Leaf screen to rearing ponds, 29

Lobelia, water, 13

May fly, introduction of, 12

Moss, great water, 13

Mussels, 12

_Nautonecta glauca_, 10, 64

Natural food, importance of, 24
natural food for fry, 48-9

Netting for rearing ponds, 31

Ova beds, artificial salmon, 85

Ova, care of, 36-9
dead, removal of, 37
hatching of, 39
of coarse fish, 90-1
of sea-trout, 87
placing in hatching trays, 34-6

Perch, 19, 90-1
suitable water for, 19

Pike, 18-9, 90-1

Planting weeds in ponds, 7
in streams, 8

Ponds for yearlings, 70-1

Rainbow trout, 14-5, 72, 75
advantage of, 72-5
freedom from fungus, 73-4
rearing of, 72-5
suitable water for, 14
spawning time of, 21

Rearing, important points in, 56-7

Rearing box, arrangement of, 34
construction of, 31
cover for, 38, 49

Rearing char, difficulties in, 79-80
fry of salmon, 85-7
fry of sea-trout, 85-7
rainbow trout, 72-5

Rearing ponds, alders round, 32;
grass round, 32
construction of, 22, 27-9
covers for, 31
gravel in, 23
importance of allowing water to run through for some weeks, 21
inlet to, 29-30
netting for, 31
pipes to, 22, 27
removal of yearlings from, 70
separating fish in, 54-6
size of, 23-4
use of earth in, 54, 56, 93-6
vegetation round, 33, 55
willows round, 32, 55

Restocking, best time for, 24

Rio Grande trout, 77

Rudd, 17, 88-9, 91
suitable water for, 17

_Salmo irideus_, 14-5, 72-5
_fario_, 15
_mykiss_, 76-8

Salmon and sea-trout, 81-7

Salmon, artificial spawning of, 83-4
artificial ova beds, 85
mortality among ova and young fish, 81
rearing fry, 85-7
scale upon which rearing should be carried out, 83
success in artificial intervent