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Subject: Aquatic biology
Subject
Benthic macroinvertebrates
2
Limnology
2
Fish populations
1
Food chains (Ecology) -- Pennsylvania -- Pymatuning Reservoir
1
Freshwater ecology
1
Multitrophic interactions (Ecology) -- Pennsylvania -- Pymatuning Reservoir
1
Predatory aquatic animals -- Pennsylvania -- Pymatuning Reservoir
1
Snails -- Pennsylvania -- Pymatuning Reservoir
1
Water -- Pollution
1
White sucker
1
No Records.