Table 1 Parameters of dissected individuals (N=45) of Perccottus glenii and content of their stomachs
Age | L (mm) | Body mass (g) | N (ind.) | Mass of food in stomach (g) | Content of food with percentage of dominant food item |
|---|---|---|---|---|---|
0+ | – | – | 25 | 0.001–0.007a | Zooplankton (close to 100%): Cladocera (Daphnia sp., Ceriodaphnia sp.), Copepoda (Mesocyclops leucartii, Eurytemora sp.); swimming larvae of Chironomidae; small Hydracarina |
2+ | 45–60 | 1.23–3.14 | 18 | 0.004–0.05 | Zoobenthos (close to 100%): Gastropoda, Chironomidae, Isopoda, Amphipoda, Odonata, Diptera n/det, Hemiptera (single Corixa sp) |
3+ | 65 | 7.24 | 1 | 0,065 | Zoobenthos (99%): Chironomidae, Isopoda, Amphipoda, Odonata; Zooplankton: Mesocyclops sp., Chydorus spahaericus; remnant of fish (Cyprinidae n/det, juv.) |
6+ | 166 | 92.2 | 1 | 2.710 | Pisces (94%): Rutilus rutilus; Gastropoda (Cincinna sp) |