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Ochoco Creek

Macroinvertebrate data: 10-30-2015



School: Crook County Middle School

Date and time: Oct. 30, 2015, 9:56 a.m.

Water quality: Excellent

Number of people sorting/identifying: 32

Water type: riffle

Time spent sorting/identifying: 90 minutes

Weather:

Percent EPT: 64.44%

Note: EPT is the total number of caddisflies, mayflies, and stoneflies found divided by number of all bugs

Sensitivity to pollution
Sensitive
Count
Caddisfly
60
Mayfly
25
Riffle beetle
0
Stonefly
2
Water penny
0
Dobsonfly
0
Sensitive total
9
Somewhat Sensitive
Count
Clam/mussel
0
Crane fly
0
Crayfish
1
Damselfly
0
Dragonfly
2
Scud
5
Fishfly
0
Alderfly
0
Mite
1
Somewhat sensitive total
8
Tolerant
Count
Aquatic worm
10
Blackfly
0
Leech
1
Midge
8
Snail
5
Mosquito larva
15
Tolerant total
5