Main Ref. | Cowx, I.G., 1989 | ||
Fish stage | juv./adults | Mean length | 20.50 FL |
Sample size | 206 | Percent empty | |
Country | UK | Locality | Trew's weir, River Exe catchment, between Mar. 1976-Nov. 1977. |
Period |
|
Diet percent | Food I | Food II | Food III | Prey stage | Item Name | Comments |
---|---|---|---|---|---|---|
28.20 % | plants | other plants | benthic algae/weeds | n.a./others | Algae | 24.9% Algae, 3.3% Macrophyta |
21.80 % | detritus | detritus | debris | n.a./others | debris | |
2.80 % | zoobenthos | insects | insects | adults | Insecta | 2.6% other aquatic Insecta, 0.2% Hemiptera |
7.60 % | zoobenthos | insects | insects | larvae | Coleoptera | 1.7% Trichoptera % 3.4% Coleoptera larvae, 2.5% Diptera larvae & pupae |
9.70 % | zoobenthos | insects | insects | nymphs | Ephemeroptera | 3.2% Plecoptera nymphs, 6.5% Ephemeroptera nymphs |
0.10 % | zoobenthos | worms | n.a./other annelids | juv./adults | Oligochaeta | Oligochaeta |
0.10 % | zoobenthos | benth. crust. | n.a./other benth. crustaceans | juv./adults | benth. crustaceans | |
3.10 % | zoobenthos | mollusks | n.a./other mollusks | juv./adults | mollusks | |
26.60 % | others | others | n.a./others | adults | Aerial Insecta | Aerial Insecta |