| Food I | Food II | Food III | Food name | Country | Predator Stage |
|---|---|---|---|---|---|
| zoobenthos | benth. crust. | amphipods | unidentified amphipods | Canada | juv./adults |
| zoobenthos | benth. crust. | benth. copepods | unidentified copepods | Canada | juv./adults |
| zoobenthos | benth. crust. | ostracods | unidentified ostracods | Canada | juv./adults |
| zoobenthos | insects | insects | midges | Canada | juv./adults |
| zoobenthos | insects | insects | unidentified beetle larvae | USA | juv./adults |
| zoobenthos | insects | insects | larvae | Canada | juv./adults |
| zoobenthos | insects | insects | unidentified nematocerans | USA | juv./adults |
| zoobenthos | insects | insects | caddis-flies | Canada | juv./adults |
| zoobenthos | mollusks | n.a./other mollusks | unidentified mollusks | Canada | juv./adults |
| zooplankton | plank. crust. | cladocerans | unidentified cladocerans | Canada | juv./adults |
| zooplankton | plank. crust. | cladocerans | unidentified | USA | juv./adults |