Herbert N. Wyatt

Fish Population Dynamics Following A Selective Shad Kill

Data is presented over a four-year period on population changes and dynamics in an 8,500-acre reservoir following rotenone treatment for selective shad reduction. Population data for four years prior to the shad kill is also discussed and analyzed. An analysis of the operation including methods, techniques, and results is presented. Records of fish stocking, creel census, age and growth and population studies after treatment is discussed and evaluated. Particular emphasis is directed toward two introduced species, white bass and threadfin shad. Data on the expansion and...

Experimental Use of Silvex and Other Aquatic Herbicides in Georgia Farm Ponds

The results of two years experimental weed control in Georgia Farm Ponds using silvex,2 propylene glycol butyl ether ester, dalapon, sodium salt of 2,2dichloropropionic acid; 2, 4-D granules of iso-octyl ester of 2,4-dichlorophenoxy acetic acid. Residual control and overall effectiveness is evaluated over a twoyear period on acquatic weeds in approximately 100 ponds. Preliminary screening of Inverton, an invert emulsion of 2, 4, 5-trichlorophenoxy acetic acid; Carlon, a solution of dalapon and silvex; and simazine, 2-chloro-4, 6 bis( ethylamino) -S-trizaine are presented. Different...