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Zigzag River
Macroinvertebrate data: 09-18-2015
School: Oregon State University
Date and time: Sept. 18, 2015, 10 a.m.
Water quality: Excellent
Number of people sorting/identifying:
Water type: riffle
Time spent sorting/identifying:
Weather:
Percent EPT: 40.19%
Note: EPT is the total number of caddisflies, mayflies, and stoneflies found divided by number of all bugs
Sensitivity to pollution
Sensitive
| Count | |
|---|---|
Caddisfly
|
6 |
Mayfly
|
30 |
Riffle beetle
|
0 |
Stonefly
|
50 |
Water penny
|
0 |
Dobsonfly
|
0 |
| Sensitive total |
9 |
Somewhat Sensitive
| Count | |
|---|---|
Clam/mussel
|
100 |
Crane fly
|
0 |
Crayfish
|
0 |
Damselfly
|
2 |
Dragonfly
|
0 |
Scud
|
0 |
Fishfly
|
0 |
Alderfly
|
0 |
Mite
|
20 |
|
Somewhat sensitive total |
6 |
Tolerant
| Count | |
|---|---|
Aquatic worm
|
2 |
Blackfly
|
0 |
Leech
|
0 |
Midge
|
3 |
Snail
|
1 |
Mosquito larva
|
0 |
|
Tolerant total |
3 |