LARGE-SCALE EXPERIMENTAL TEST OF COPPER SULFATE AS A CONTROL 

 FOR THE FLORIDA RED TIDE 



Laboratory experiments, and a few 

 field experiments (Joe 0. Bell, unpublished 

 manuscript), have indicated that the red 



As far as the third criterion is 

 concerned but little information was 

 obtained, but more concerning the effect 

 -■^ -— — "- "" /^<-hoT- rvraaniRiriR under actual 



UNITED STATES 



DEPARTMENT OF THE INTERIOR 



Fish and Wildlife Service 



Bureau of Commercial Fisheries 



Washington 25, D. C. 



Please insert this ADDENDUM 



m: 



Special Scientific Report— Fisheries No. 270, LARGE-SCALE 

 EXPERIMENTAL TEST OF COPPER SULFATE AS A CONTROL FOR THE 

 FLORIDA RED TIDE by George A. Rounsefell and John E. Evans. 



r<=n..^- ^" *<^^h 1958, after the completion of the manuscript of this 

 report, a selected panel of 14 biologists versed in this field of 



eries'tn Tl^ '"''''"^ ""' '^" ''''^"*°' °^ *^^ «""^" °^ Commercial Fish- 

 concensus 0^*^^"^ °" ""V"' "^'''^ "* Galveston. Texas. It was the 

 concensus of this group, after mature consideration of the copper sul- 



ff contror^'n' '"'^km' combination of excessive cost, shorfduration 

 citinTrfly. possibility of harm to other marine life render appli- 

 cation of the method inadvisable. 



May 1959 



INT.DUP..D.C.59- 57011 



day and developed the final dusting tech- 

 nique. AlexcUider Dragovich made the vessel 

 surveys and collected the samples for both 

 copp.er analysis and G. breve counts. Espe- 

 cial credit should also be given pilot 

 William D. (Tommy) Wood who flew the Ser- 

 vice plane and Captain John D. McCormick 

 who operated the vessel Kingf ish regardless 

 of weather. As indicated in the text, the 

 Florida State Board of Conservation took 

 an active and vigorous part, and special 

 thanks due Ernest C. Mitts, Director; Robert 

 M. Ingle, Director of Research; and Dr. 

 Robert F. Hutton, in charge of their St. 

 Petersburg Laboratory. 



a large orange target on the beach and the 

 laboratory vessel Kingf ish , which main- 

 tained by radar a stable position just 

 offshore of the area of discolored water. 

 After each plane load the vessel and target 

 were moved forward. 



This method was abandoned because 

 (1) it tied up the vessel, which was needed 

 for sampling, (2) it was difficult to use 

 the beach target except on straight 

 stretches of beach, and (3) many dense 

 patches of discolored water were somewhat 

 offshore, and did not require dusting close 

 to the beach. After some experimentation 



