| Food I | Food II | Food III | Food name | Country | Predator Stage |
|---|---|---|---|---|---|
| detritus | detritus | debris | inorganic material | Portugal | juv./adults |
| others | other terrest. invertebrates | n.a./terrest. insects | Coleoptera adults | Portugal | juv./adults |
| others | other terrest. invertebrates | n.a./terrest. insects | Corixidae | Portugal | juv./adults |
| others | other terrest. invertebrates | n.a./terrest. insects | Diptera adults | Portugal | juv./adults |
| plants | other plants | terrestrial plants | plant material | Portugal | juv./adults |
| plants | other plants | terrestrial plants | seeds | Portugal | juv./adults |
| zoobenthos | benth. crust. | n.a./other benth. crustaceans | small crustaceans | (not available) | juv./adults |
| zoobenthos | benth. crust. | ostracods | unidentified ostracods | Portugal | juv./adults |
| zoobenthos | insects | insects | midge larvae | Portugal | juv./adults |
| zoobenthos | insects | insects | Diptera nymphs | Portugal | juv./adults |
| zoobenthos | insects | insects | mayflies | Portugal | juv./adults |
| zoobenthos | insects | insects | insects larvae | (not available) | juv./adults |
| zoobenthos | insects | insects | blackflies | Portugal | juv./adults |
| zoobenthos | other benth. invertebrates | n.a./other benth. Invertebrates | unidentified | (not available) | juv./adults |