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Toxicity of certain chemicals to juvenile Pompano, Trachinotus carolinus
Birdsong, C.L. (1969). Toxicity of certain chemicals to juvenile Pompano, Trachinotus carolinus. MSc Thesis. Louisiana State University: Baton Rouge. 36 pp.

Keywords
    Brackish water; Fresh water

Author  Top 
  • Birdsong, C.L.

Abstract
    The use of chemicals to control parasites and diseases of marine fish was investigated. Acute toxicity of copper sulfate, patassium permanganate, acriflavin, and fOrmalin to juvenile pompana was determined using the toxicity bioassay. The measure or relative toxicity used was the graphically-determined median tolerance limit This limit was tested in 24,48, 72, and 96 hour static tests. Five different concentrations of each chemical were tested at salinities of 10,20, and 30 ppt. The effect of salinity on acute toxicity was measured statistically from toxicity test results Lethal effect of copper sulfate decreased as salinity increased and toxicity af potassium permanganate increased with an increase in salinity. Salinity did not affect toxicity of acriflavin and formalin. Length of exposure did not affect tolerance of juvenile pompano to formalin. In other chemicals tested, tolerance decreased as exposure time increased. Juvenile pompano were held in six different concentrations of tricaine methanesulfonate (MS-222) for 12 hours. Concentrations of 10 to 18 ppm were found to be effective in hauling pompano. Fish in these concentrations suffered an overall depression in metabolism, but retained equilibrium.Fish parasitized by Scyphidia, Oodinium, Trichodina were treated with copper sulfate, potassium permanganate, and formalin. Numbers of parasites present on the gills were counted after treatments. Formalin was found to be most effective for control of these parasites.

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