Ralph M. Burress

Applications of 1.5 mg/l ofThanite were made in a 0.68-hectare hard-water pond and a 3.64-hectare soft-water pond in Florida. The 19 species of fishes collected alive represented the following families: Lepisosteidae; Anguillidae; Esocidae; Cyprinidae; Catostomidae; Ictaluridae; Aphredoderidae: Cyprinodontidae; Poeciliidae; Atherinidae; and Centrarchidae. The treatment was not effective for collecting bowfin (Amia calva), yellow bullheads (lelulurus natalis), or brown bullheads (I. nebulosus). Thanite eliminated all but 20 fish (0.4 percent) in the small pond and 100 (1.4 percent) in the...

A new method of using antimycin to thin overcrowded sunfish populations was tested in five ponds from 2.8 to 8.2 acres in surface area. Concentrations of 0.6 to 1.6 parts per billion of antimycin applied in the shallow upper ends of the ponds removed from 21.0 to 102.1 pounds per acre of sunfishes, but killed almost no largemouth bass of any size. The partial treatment method worked well in every pond in which it was tested despite some wide diurnal fluctuations in pH. Advantages of the new method are: I) applications are based on easily obtained estimates of water volume in the treated...

A quantitative creel census was conducted for eight years on the Missouri portion of Bull Shoals Reservoir; on the Little North Fork Arm from 1953 through 1958, and on the White River Arm from 1955 through 1960. Sport fishing catch from the Little North Fork Arm averaged 39.2 pounds per acre (44.0 fish) over the six-year period. About 89.3 percent of the weight of fish taken was of predacious game fishes, including 49.6 percent (19.6 pounds per acre) of largemouth bass (Micropterus salmoides), 9.2 percent (3.5 pounds per acre) of spotted bass (Micropterus punctulatus) , and 23.1...

In April, 1958, creel censuses on the White River Arm of Bull Shoals Reservoir, Missouri, were altered to permit separate tabulations of data from anglers who fished exclusively in three areas of flooded standing timber. The combined acreage of the timbered areas is 6.3 acres, or 0.26 per cent of the entire creel census area (2,380 acres). During 1959, nearly 15 per cent of all anglers counted were timber fishermen. Fishing pressure in that year amounted to 5,138 hours per acre in timbered areas, as compared to 97 hours per acre in the remainder of the census area. The hook-and-line...