% 



Table 4. Comparisons of feeding rates for Euvytemora af finis (adults, 

 mixed sexes) feeding on labeled Monoahrysis tutheri cells in 

 clean water (control) and 500 milligrams 1"-^ Patuxent River 

 silt at increasing time intervals. 



Time 

 (hours) 



Reduction 

 (percent 



1 



-eeding rate (ce 



Lis org"'^ day"-^) 





















of 

 control) 



Control 





Patuxent silt 







X 



+ 



S.E.x 



N 



X ± 



S.E.x 



N 



0.083 



97.5^ 



3,510,179 



+ 



456,520 



(10) 



87,896 ± 



13,654 



(8) 



0.167 



87. 3^ 



1,125,181- 



+ 



350,339 



(8) 



143,447 ± 



30,666 



(8) 



0.250 



80. 2^ 



388,312 



+ 



104,289 



(9) 



76,840 ± 



16,854 



(9) 



0.50 



56. 7^ 



115,480 



+ 



16,815 



(9) 



50,007 ± 



7,445 



(9) 



0.75 



84.5^ 



473,169 



+ 



51,393 



(9) 



73,561 ± 



23,681 



(6) 



1.00 



70. 9^ 



203,288 



+ 



55,791 



(9) 



59,242 ± 



15,523 



(8) 



1.25 



73.7^ 



224,669 



+ 



33,631 



(10) 



59,004 ± 



9,488 



(8) 



1.50 



73. 2^ 



268,712 



+ 



52,840 



(10) 



72,072 ± 



7,572 



(10) 



1.75 



83. 6^ 



281,963 



+ 



50,613 



(10) 



46,269 ± 



15,460 



(8) 



2.00 



94.9^ 



391,987 



+ 



54,845 



(9) 



20,117 ± 



5,037 



(8) 



2.25 



86.3^ 



177,508 



+ 



20,268 



(8) 



24,346 ± 



3,802 



(8) 



2.50 



77. 5^ 



131,906 



+ 



21,771 



(8) 



29,621 ± 



5,845 



(10) 



2.75 



81.4^ 



104,567 



+ 



13,363 



(10) 



19,404 ± 



3,643 



(8) 



3.00 



85.2^ 



91,260 



+ 



17,539 



(10) 



13,464 ± 



2,820 



(10) 



3.25 



54.1^ 



103,008 



+ 



12,695 



(10) 



47,282 ± 



8,649 



(7) 



3.50 



83.73 



98,442 



+ 



21,270 



(10) 



16,014 ± 



3,564 



(9) 



3.75 



59. O'* 



126,616 



+ 



34,299 



(9) 



51,924 ± 



4,910 



(6) 



4.00 



57. 3^ 



149,891 



+ 



19,933 



(8) 



64,041 ± 



6,288 



(10) 



1. p<0.001. 



2. p<0.05. 



3. p<0.01. 



4. Not significant, 



34 



