| Food I | Food II | Food III | Food name | Country | Predator Stage |
|---|---|---|---|---|---|
| detritus | detritus | debris | unidentified | UK Engld Wal | juv./adults |
| others | other terrest. invertebrates | n.a./terrest. Insects | unidentified terrestrial organisms | UK Engld Wal | juv./adults |
| zoobenthos | benth. crust. | ostracods | unidentified | UK Engld Wal | juv./adults |
| zoobenthos | insects | insects | midge | UK Engld Wal | juv./adults |
| zoobenthos | insects | insects | unidentified chironomid larvae | Finland | larvae |
| zoobenthos | insects | insects | beetle | UK Engld Wal | juv./adults |
| zoobenthos | insects | insects | mayfly | UK Engld Wal | juv./adults |
| zoobenthos | insects | insects | aquatic bugs | UK Engld Wal | juv./adults |
| zoobenthos | insects | insects | stonefly | UK Engld Wal | juv./adults |
| zoobenthos | insects | insects | Caddis fly | UK Engld Wal | juv./adults |
| zoobenthos | other benth. invertebrates | n.a./other benth. Invertebrates | unidentified | UK Engld Wal | juv./adults |
| zoobenthos | worms | n.a./other annelids | leeches | UK Engld Wal | juv./adults |
| zooplankton | fish (early stages) | fish eggs/larvae | Coregonus albula | Finland | juv./adults |
| zooplankton | fish (early stages) | fish eggs/larvae | Coregonus lavaretus lavaretus | UK Engld Wal | juv./adults |
| zooplankton | other plank. invertebrates | n.a./other plank. invertebrates | Asplanchna | Finland | larvae |
| zooplankton | plank. crust. | cladocerans | unidentified | UK Engld Wal | juv./adults |
| zooplankton | plank. crust. | cladocerans | water louse | UK Engld Wal | juv./adults |
| zooplankton | plank. crust. | plank. copepods | unidentified calanoid nauplii | Finland | larvae |
| zooplankton | plank. crust. | plank. copepods | unidentified cyclopoid copepodids | Finland | larvae |
| zooplankton | plank. crust. | plank. copepods | unidentified cyclopoid nauplii | Finland | larvae |
| zooplankton | plank. crust. | plank. copepods | unidentified | UK Engld Wal | juv./adults |