Length class (mm) Length class (mm) Length class (mm) Length class (mm)
O. niloticus O. niloticus O. niloticus C. rendalli C. rendalli C. rendalli
<50 mm 51-100mm 101-150mm <50 mm 51-100mm 101-150mm
N 9 3 8 10 4 6
B 0.7 0.6 0.1 0.6 0.6
Food item group Specific food item
Cyanophyceae Chroococcus 14.6
Merismopedia 27.8 0.5 5.9 14.6 2.4
Microcystis 66.7 90 17.7 28.6
Oscillatoria 50 40 20 76.5 42.9
Spirulina 50 14.6 14.6
Anabaena 28.6
Chlorophyceae Ankistrodesmus 20 43 17.7 14.3
Asterococcus 44.4 60
Closterium 11.1 5.9
Cosmarium 50 20 41.2 28.6
Filamentous algae 72 60 3.4 100 71.4 49.4
Gonium 83.3 70 11.8 28.6 7
Tetrastrum 20
Diatomophyceae Amphora 14.3
Cycotella 100 80 5 47.6 71.4 7.9
Cymbella 38.9 20 57.1
Gomophonema 72 40 71.4
Gyrosigma 5.6 28.6 14.3
Melosira 88.9 70 1.3 29.4
Navicula 94.4 90 5.9 5.5
Dinophyceae Pinnularia 77.8 50 5.9
Rotifers Synedra 55.6 20
Brachionus 38.9 20 35.3 14.6 21
Rhizopoda Centropyxis 27.8 20 35.5 28.6 74.2
Plant detritus 77.8 50 0.5 100 100
Microfauna Insexts 4 78