| Food I | Food II | Food III | Food name | Country | Predator Stage |
|---|---|---|---|---|---|
| nekton | finfish | bony fish | unidentified | Canada | adults |
| zoobenthos | benth. crust. | n.a./other benth. crustaceans | unidentified crustaceans | USA | juv./adults |
| zoobenthos | insects | insects | mayflies | Canada | adults |
| zoobenthos | insects | insects | unidentified midges | Canada | adults |
| zoobenthos | insects | insects | stoneflies | Canada | adults |
| zoobenthos | insects | insects | caddiesflies | Canada | adults |
| zoobenthos | mollusks | n.a./other mollusks | unidentified mollusks | USA | juv./adults |
| zoobenthos | other benth. invertebrates | n.a./other benth. Invertebrates | unidentified | Canada | adults |
| zoobenthos | worms | n.a./other annelids | unidentified annelids | USA | juv./adults |
| zooplankton | fish (early stages) | fish eggs/larvae | Prosopium williamsoni | Canada | adults |