Contents -- Success in Fishing - Skill or Luck? -- Fishing Techniques -- Lake Dynamics -- Population Dynamics -- Management of Waters for Fish Production -- Improvement of Lakes and Streams -- The Natural Diet of Fish -- Parasites and Infections of Fish -- Anatomy and Physiology of Fish -- Factors in the Aquatic Environment -- Classification and Origin of the Fishes -- Artificial Key to Families of Northern Fishes -- Class Cyclostomata -- Family Petromyzonidae -- Class Osteichthyes -- Family Polyodontidae -- Family Acipenseridae -- Family Lepisosteidae -- Family Amiidae -- Family Hiodontidae -- Family Clupeidae -- Family Salmonidae -- Family Osmeridae -- Family Umbridae -- Family Esocidae -- Family Cyprinidae -- Family Catostomidae -- Family Ictaluridae -- Family Anguillidae -- Family Percopsidae -- Family Aphredoderidae -- Family Gadidae -- Family Cyprinodontidae -- Family Poeciliidae -- Family Gasterosteidae -- Family Atherinidae -- Family Sciaenidae -- Family Percichthyidae -- Family Centrarchidae -- Family Percidae -- Family Cottidae -- References -- Index -- A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- K -- L -- M -- N -- O -- P -- Q -- R -- S -- T -- U -- V -- W -- X -- Y -- Z.