| Food I | Food II | Food III | Food name | Country | Predator Stage |
|---|---|---|---|---|---|
| detritus | detritus | debris | detritus | Mexico | juv./adults |
| nekton | finfish | bony fish | unspecified finfishes | Canada | juv./adults |
| nekton | finfish | bony fish | fish scales | Mexico | juv./adults |
| others | other terrest. invertebrates | n.a./terrest. insects | dragonflies | Mexico | juv./adults |
| others | other terrest. invertebrates | n.a./terrest. insects | unidentified dipterans | Mexico | juv./adults |
| others | other terrest. invertebrates | n.a./terrest. insects | unidentified hymenopterans | Mexico | juv./adults |
| others | other terrest. invertebrates | n.a./terrest. insects | unidentified lepidopterans | Mexico | juv./adults |
| zoobenthos | benth. crust. | amphipods | Hyalella sp. | Mexico | juv./adults |
| zoobenthos | benth. crust. | ostracods | unidentified ostracods | Mexico | juv./adults |
| zoobenthos | benth. crust. | shrimps/prawns | Palaemonetes sp. | Mexico | juv./adults |
| zoobenthos | insects | insects | midges | Mexico | juv./adults |
| zoobenthos | insects | insects | unidentified coleopterans | Mexico | juv./adults |
| zoobenthos | insects | insects | unidentified ephemeropterans | Mexico | juv./adults |
| zoobenthos | insects | insects | unidentified hemipterans | Mexico | juv./adults |
| zoobenthos | mollusks | gastropods | Cochliopina sp. | Mexico | juv./adults |
| zoobenthos | mollusks | gastropods | unspecified snails | Canada | juv./adults |
| zooplankton | fish (early stages) | fish eggs/larvae | fish eggs | Mexico | juv./adults |