114 
Mary Beth Roush and Donald C. Tarter 
Table 1. Seasonal foregut analysis of Ptilostomis postica krvae from Green- 
bottom Swamp, Cabell County, West Virginia. X = mean, %FO = 
percent frequency of occurrence. N = November (20 larvae), D = 
December (1 1 larvae), M = March (43 larvae). 
Fall 
Category 
Taxa 
X 
%FO 
(N) 
Copepods 
Cyclops sp. 
4.82 
85 
Ostracods 
2.1 
50 
Cladocerans 
1.0 
15 
Midge larvae 
Chironomus sp. 
1.0 
5 
Rotifers 
1.0 
5 
Filamentous algae 
1.0 
20 
Unidentified 
1.0 
30 
Grid 
Detritus 
11.55 
100 
method: 
Diatoms 
0.42 
20 
Winter 
(D) 
Copepods 
Cyclops sp. 
4.33 
55 
Ostracods 
2.33 
55 
Cladocerans 
1.75 
36 
Midge larvae 
Chironomus sp. 
1.0 
9 
Rotifers 
11.0 
9 
Dipterans 
1.0 
9 
Filamentous algae 
Microspora 
1.0 
9 
Unidentified 
1.0 
18 
Grid 
Detritus 
18.39 
100 
method: 
Diatoms 
1.19 
73 
Spring 
(M) 
Ostracods 
4.5 
20 
Midge larvae 
Chironomus sp. 
2.0 
20 
Rotifers 
9.0 
5 
Filamentous algae 
1.0 
5 
Unidentified 
Odonata 
1.0 
5 
Grid 
Detritus 
27.12 
100 
method: 
Diatoms 
0.90 
62 
