Table 4. Stomach Contents of Bluebreast Darters taken from the Blue River, a
Southern Indiana Tributary of the Ohio River. Some 59 darters taken from the
main stream from 1977-1986 used for this analysis. PTO=Percent of total number
of organisms ingested; PFO=percent frequency of occurrence. Table based on
information gathered by former students, Greg Shirk and Keith Erny.
|
|
FISH LENGTH INTERVALS IN MM PTO PERCENT FREQUENCY OF OCCURRENCE (PFO) |
|||||
FOOD ITEM |
|
34-42 |
43-51 |
52-60 |
61-69 |
70-78 |
|
DIPTERA |
57.4 |
|
|
|
|
|
SimuliidaeSimulium |
26.1 |
4.2 |
50 |
77.8 |
50.0 |
0 |
|
Ceratopogonidae Dasyhelea |
30.9 |
54.2 |
61.1 |
66.7 |
50.0 |
100.0 |
|
Chironomidae Ablabesymia |
0.25 |
|
5.6 |
|
|
|
EPHEMEROPTERA |
21.4 |
|
|
|
|
|
|
Caenidae |
19.1 |
70.8 |
50.0 |
55.6 |
50.0 |
100.0 |
|
Heptageniidae Epeorus |
1.7 |
16.7 |
5.6 |
11.1 |
|
|
|
Baetidae |
0.5 |
|
11.1 |
|
|
|
|
LEPIDOPTERA |
1.0 |
|
|
|
|
|
|
Pyralidae Paragyractis |
1.0 |
8.3 |
11.1 |
|
|
|
|
TRICHOPTERA |
19.6 |
|
|
|
|
|
|
Hydropsychidae Hydropsyche |
11.3 |
20.8 |
44.4 |
55.6 |
50.0 |
100.0 |
|
Unidentified |
8.3 |
37.5 |
38.9 |
|
|
100.0 |
|
MISCELLANEOUS |
0.25 |
|
5.6 |
|
|
100.0 |
|
Stomachs with food |
|
24 |
18 |
9 |
2 |
1 |
|
Stomachs without food |
|
5 |
|
1 |
|
|