Theses and Dissertations


Title: The effectiveness of certain fungicides on goldfish and goldfish eggs

Name: Estes, Ray Don

Degree: MS

Chair: Dr. Homer S. Swingle

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1957

Pages: 75

Keywords: Fungicide,Goldfish,Carassium auratus,Goldfish eggs.

Abstract:

Fungus infections on fish and fish eggs cause considerable losses in warm-water fish culture. Control measures that might be applied in warm-water fish culture are needed.Preliminary tests wre conducted to determine the maximum concentration of selected fungicides that would allow 95 to 100 per cent survival of the goldfish [Carassium auratus (Linnaeus)] exposed for 60 minutes and for 24 hours. Goldfish infected with fungi, and in some instances other diseases, were used in prolonged exposure and short exposure experiments at various concentrations of malachite green, copper sulphate, formalin, potassium permanganate, potassium dichromate, methylene blue, Hyamine 1622, Hyamine 2389, Phygon XL, iodized table salt, and Diaprene Chloride. None of these was entirely satisfactory, but potassium permanganate at concentrations of 2 and 3 p.p.m., repeated after 48 hours, was the most effective of the prolonged exposure treatments. The same chemical at a concentration of 8 p.p.m. for 60 minutes proved to be the most effective short exposure treatment. Golfish eggs were treated with malachite green, copper sulphate, formalin, potassium permanganate, potassium dichromate, methylene blue, Hyamine 1622, Hyamine 2389, Phygon XL, Roccal, and Hyamine Experimental Quaternary 3104. Of these, potassium dichromate at concentrations ranging from 10 to 35 p.p.m.: methylene blue at a concentration of 35 p.p.m.: and Hyamine 2389 at a concentration of 0.5 p.p.m. are recommended for prolonged exposure treatments of eggs. For short exposure treatments of 60 minutes, methylene blue at concentrations ranging from 10 to 25 p.p.m. and Hyamine Experimental Quaternary 3104 at a concentration of 7.5 p.p.m. are recommended. Five species of fungi belonging to two genera (Achyla and Saprolegnia) of the family Saprolegniaceae were isolated from fish and were identified. Two species and four genera of Achyla were identified from goldfish eggs from the canal which supplied water to some of the ponds from which eggs and fish were obtained.

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