whenever possible. Fourteen ponds were rotenoned after portions of the pop- 

 ulation had been markedo Six additional ponds were sufficiently seinable to 

 provide some usable population data, although no accurate estimates of the 

 small (less than 3o0 inches in length) unmarked fish could be obtained in this 

 way. Niombers of the larger marked fish were computed from the proportions 

 of marked fish obtained by repeated seining efforts in the manner proposed 

 by Schnabel (1938)= The remaining 8 ponds could not be rotenoned because 

 of lack of permission of the pondowners and could not be seined efficiently 

 enough to allow a population estimate = In most cases, however, the seines 

 and electric gear provided adequate samples for determination of growth rates 

 and the occurrence or non-occurrence of reproductiono 



Results for the two separate years are presented more or less concurrently^ 

 Usuable data were collected from 33 ponds the first year, and from 28 the 

 secondo Five of the original 39 ponds went dry, or nearly so| two became 

 badly contaminated by trash fish| two were renovated by the owner; one was 

 found to have been improperly stocked? and one had been rotenoned at the end 

 of the first year„ Most ponds had slightly higher turbidities during the 

 second year due to a greater rainfall and larger runnoff, but in only two 

 ponds was the difference large » For most purposes the average turbidities 

 assigned to the ponds represents a simple average of all readings taken over 

 the two-year period of study., These included an average of 9 readings (8 for 

 some ponds, 10 for others) taken at regular intervals from May to October in 

 1954, and 8 readings taken from Iferch through August in 1955. For those 

 ponds from which data were collected only in 1954, the turbidities assigned 

 of course represent an average for only the single year. 



