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Simplified representation of the taxonomic relationship between the five fish species used in the experiment.
| division Teleostei |
| subdivision Euteleostei |
| superorder Ostariophysi |
| order Cypriniformes |
| family Catostomidae—white sucker |
| superorder Protacanthopterygii |
| order Salmoniformes |
| family Salmonidae |
| genus Salvelinus—lake trout, brook trout |
| genus Oncorhynchus—rainbow trout |
| order Esociformes |
| family Esocidae—northern pike |
