Gregory L. Summers

Following 3 years of a 356 mm (14 inch) minimum length limit on black bass, a protective length range (slot) regulation was placed on Arbuckle Reservoir, Oklahoma. This slot length limit protected both largemouth and spotted bass in the 300-381 mm (12-15 inch) range. Bass density, as indicated by spring electrofishing catch-per-effort (C/f, increased over the duration of the study. Most noteworthy was the increase in density of largemouth bass>381 mm long. Proportional Stocking Density (PSD) also improved as an indication of changes in population structure. Initially, angler compliance...

Stomachs of 240 adult largemouth bass (Micropterus salmoides) taken from a small impoundment with abundant aquatic vegetation, were evacuated and their contents examined. Thirty percent of the bass had empty stomachs. Crayfish, bluegill (Lepomis macrochirus), and young-of-year largemouth bass were the predominant food items. Electivity values (E) indicated negative selection for bluegill and positive selection for young bass. Dense, aquatic macrophytes are probably the major factor influencing the feeding behavior of these bass.

Ultrasonic transmitters were surgically implanted into 50 sexually mature walleye Stizostedion vitreum vitreum (mean weight 1.9 kg) in Canton Reservoir during March 1977. The locations of these fish were determined bimontly from March through November 1977, as an indication of walleye concentration areas in the reservoir. Temperature, dissolved oxygen and pH profiles were also obtained bimonthly at 2 stations during this time. During the March spawning season walleye were all located near the riprap of the dam. The rest ofthe year the fish showed a preference for areas near submerged...