Advantages of rainbow trout, 72-5

Air bubble in yolk sac, 40

Alders round rearing ponds, 32
at water side, importance of, 19

Alevins, 39-41
diseases of, 40-1

Alpine char, 78American 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

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, 78-80
Alpine, 78
difficulties in breeding, 78-80
hatching out of, 78-9
introduction of, to the south, 80
kinds of, 78
rearing, 79-80
suitable water for, 16
Windermere, 78

Charring wood, importance of, 33, 50

Chub, suitable water for, 18

Coarse fish, 88-92
ova of, 90-1

Colorado River trout, 77

Columbia River trout, 77

Conchifera, 12

CorixÆ, 10, 49, 63

Covers for rearing ponds, 31

Creatures, aquatic, serving as food for fish, 10-2, 61-6

Crowfoot, water, 13

Cure for fungus, 50

Cut-throat trout, 76-8

Cyclops quadricornis, 12, 48, 65-6

CypridÆ, 65-6

Dace, 18, 89-90
suitable water for, 18

Daphnia pulex, 12, 48, 65

Dead alevins, removal of, 41

Dead ova, removal of, 37

Difference between beetles and CorixÆ, 11

Diseases of alevins, 40-1
ova, 37-9

Dytiscus marginalis, 11, 49, 58-60, 63

Earth in rearing boxes, 46, 93-6
doses of, in rearing pond, 54, 93-6

Effects of soft food on trout, 24

EphemeridÆ, 12, 64-5
larvÆ of, 64-5
catching larvÆ of, 64

Feeding of the fry, 42-9

Feeding yearlings, 67

Food, importance of, in waters, 5, 7

Fresh-water shrimp, 10, 49, 65
snails, 10-2

Friends and enemies of the fish, 58-66

Fry, feeding of, 42-9
separating large from small, 45
turning out of rearing box, 51-2Fungus, 38-9
cure for, 50

Gammarus pulex, 10, 49, 65

Gold-fish, suitable water for, 18Grannom, introduction of, 12

Grass round rearing ponds, 32

Grayling, possible harm done by, to trout, 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, 21Rearing, 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 intervention in stock of, 81-2

Salt, as cure for fungus, 50
dose of, for yearlings, 69-70

Salvelinus fontinalis, 15.
(See American brook trout.)

Saprolegnia, 38-9.
(See Fungus.)

Sea-trout, ova of, 87
rearing fry of, 85-7

Sea-water as cure for fungus, 50

Separating yearlings, 68

Shrimp, fresh-water, 10, 49, 65Shrimps in hatching trays, 36

Snails, fresh-water, 10-12

Soft food, effects of, on trout, 24

Spawning time of American brook trout, 76

Stocking waters with food, 7

Stonewort, water-, 13

Suitable fish and suitable water, 14

Trout, collecting wild ova of, 20
ova, management of, 20, 34-9

Turning fry out of rearing box, 51-2
out yearlings, 68-9

Varnishing wood, importance of, 33, 50

Vegetation, aquatic, importance of, 7
aquatic, development of, 9
importance of, at water side, 19
on banks of water, 9, 19
round rearing ponds, 32, 55

Water-boatman, 10, 64
beetles, 11, 58-60, 63
bugs, 63-4
celery, 13
cress, 13
crowfoot, 13
flea, 12, 48
lilies, 13
lobelia, 13
louse, 65
scorpion, 64
starwort, 13

Weeds, importance of, in waters, 7
planting in ponds, 7
in streams, 8

Willow round rearing ponds, 32, 55
at water side, 19

Windermere char, 78