Wilmer A. Rogers

"Red-sore" disease of fishes caused by the stalked ciliate Epistylis, is very common and widespread in the Southeastern U. S. Epizootics occur most frequently during the winter and spring months. Research has shown that this species is not an obligate parasite but only uses the host fish as an attachment site. The disc-like attachment organelle, penetrating the skin of the fish, apparently secretes an enzyme that dissolves the fishes' scales or spines and produces pit-like inflamed lesions. Bacterial infections often occur secondarily to the Epistylis infestation. Observations of the life...

During the period July 1, 1964 to June 31, 1968, a total of 300 cases was received for diagnosis at the Southeastern Cooperative Fish Disease Laboratory at Auburn University. Ninety of the cases (30%) were determined to be caused by parasites, 104 cases (34.7%) were determined to be caused by bacteria or viruses. The remainder of the cases were routine prestocking checks, kills due to factors other than disease producing organisms, or undetermined cases due to unsuitable specimens for diagnosis or lack of data. A detailed breakdown of the cases is given including seasonal occurrence,...

The stomachs of 525 largemouth bass fry and fingerlings were examined and the food organisms identified to genus when possible. Length and width measurements were made on the food organisms to determine area and then the area was used as an index to volume. The most important food organisms were copepods, cladocerans, and midges. There was a size relationship between fish and food item with the larger fish taking a larger food item. Fish smaller than 15 millimeters in length ate copepods and cladocerans primarily while larger fish ate mostly midges. No cannibalism was detected in the fish...

A study involving macro-invertebrate populations, fish populations, and water quality determinations was conducted on Bicycle Path Creek and Parkerson Mill Creek, Lee County, Alabama, during a nine-month period in 1959. The streams, averaging 7.0 and 5.8 inches in depth and 10.0 and 12.8 feet in width, respectively, received domestic sewage from approximately half of the 16,000 inhabitants of Auburn, Alabama. Sewage was diverted from Bicycle Path Creek and pumped via a lift station to a sewage treatment plant located on Parkerson Mill Creek. The plant became operative about halfway through...