350 



ESCH AND HA2EN 



110 — 



100 — 



o 



1 — I — I — I — I — I — I — I — I — I — I — I — I — I — I — I — \ — \ — I — I — I — r 



ASONDJ FMAMJJASONDJ F MAM 



1975 



1976 



1977 



Fig. 10 Monthly changes in mean number of A. hydrophila cells per 

 milliliter and in infection percentage of largemouth bass 

 from Par Pond. Note that a rise in bacterial cell density (solid arrow) 

 frequently precedes a rise in infection percentage among bass 

 (dashed arrow). (CV <35%.) 



organic loading may lead to seasonal depression of dissolved oxygen 

 in hypolimnetic water, efforts were made to measure total organic 

 carbon at several sites in Par Pond during each of four consecutive 

 seasons. These measurements were made simultaneously with the 

 other five water-quality parameters and the density of ^. hydrophila. 

 As shown in Table 1, there was some seasonal variabiUty, as might be 

 expected. There was not, however, a relation between total organic 

 carbon and the other water-quality parameters nor A. hydrophila 

 density. 



