| Food I | Food II | Food III | Food name | Country | Predator Stage |
|---|---|---|---|---|---|
| nekton | finfish | bony fish | Anguilla anguilla | UK | adults |
| nekton | finfish | bony fish | Gobio gobio | UK | adults |
| nekton | finfish | bony fish | Leuciscus leuciscus | UK | adults |
| nekton | finfish | bony fish | Phoxinus phoxinus | UK | adults |
| nekton | finfish | bony fish | Rutilus rutilus | UK | adults |
| plants | other plants | benthic algae/weeds | benthic algae/weeds | UK Engld Wal | juv./adults |
| zoobenthos | benth. crust. | n.a./other benth. crustaceans | unidentified | UK | juv./adults |
| zoobenthos | insects | insects | unidentified chironomid larvae | Spain | juv./adults |
| zoobenthos | insects | insects | unidentified ephemeropteran larvae | Spain | juv./adults |
| zoobenthos | insects | insects | unidentified trichopteran larvae | Spain | juv./adults |
| zoobenthos | insects | insects | unidentified | UK | juv./adults |
| zoobenthos | insects | insects | unidentified | UK | recruits/juv. |
| zoobenthos | mollusks | n.a./other mollusks | unidentified | UK | juv./adults |
| zoobenthos | worms | n.a./other annelids | unidentified | UK | juv./adults |
| zooplankton | other plank. invertebrates | n.a./other plank. invertebrates | unidentified protozoans | UK | recruits/juv. |
| zooplankton | other plank. invertebrates | n.a./other plank. invertebrates | unidentified rotifers | UK | recruits/juv. |
| zooplankton | plank. crust. | n.a./other plank. crustaceans | unidentified | UK | recruits/juv. |