TABLE OF CONTENTS Pages Crater Lake Location, routes to it; origin; climatic conditions; their effect on lake



















- 2, 3 Economically Important Life in Crater Lake, Its Possible Origin. Algal life Insect life, crustacean life; higher forms







4, 11 Fish of Crater Lake First plantings, those now indigenous
















- 12, 14 The Crater Lake Pond Community Nature's balance in the lake




















- 16, 19 Securing Fish for Study or Sport Casting, trolling, baits


















20, 21 Food Habits of Crater Lake Fish General considerations






















22, 24 The Midges— —
—— 25,26 The Caddis Forms







































- 27, 28 The Snails



































27,28 The Beetles


















































31,32 Ichneumon Flies


















































































- 33 Daphnia, The Water Flea


































- 34, 35 Gammarus, the Fresh Water Shrimp
























36 Dragon Flies













































37, 31 Flying Ants































- 39 Flies










































- 40 Vertebrate Remains Salamanders































41 Dead flies





























44 Miscellaneous Food Items























45, 46 Food Charts

























47 Breeding Habits of Crater Lake Fish-
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48, 49 Conclusion




































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