Donald W. Johnson

Growth Variation In Selected Fishes Of Barkley Lake And Adjoining Land Between The Lakes Subimpoundments

Population growth differences were demonstrated for channel catfish (Ictalurus punctatus), largemouth bass (Micropterus salmoides), white crappie (Pomoxis annularis) and freshwater drum (Aplodinotus grunniens) from mainstream bays of Barkley Lake, as well as between these bays and adjoining subimpoundments. Growth in Crooked Creek Bay fish was atypical, with those fish exhibiting overall superior growth. Subimpoundments contained viable fish populations, but those fish were generally in poorer condition than mainstream fish. Great heterogeneity in growth existed within a large flood...


Feeding Habits Of Catfishes In Barkley And Kentucky Lakes

Indices of relative importance and forage ratios are presented for food items of channel (/cta!urus punctatus) and blue catfishes (I. furcatus) collected from two large impoundments in western Kentucky. Data reported include samples collected from September 1977 to April 1978. Young of the year catfishes from both lakes relied heavily on zooplankton and aquatic insects. Other food items which were seasonally important included debris, trichopterans, bryozoans, and fish. Teleosts were the most important food items of intermediate sized (150-300 mm TL) catfishes in both lakes. Hexageniid...