Table 3. Frequency of occurrence and volumetric contribution of different food items in the diet of Labeobarbus intermedius sampled from Ribb Reservoir (n = 132)

Food items	Frequency of occurrence		Volumetric contribution
	Number	(%)	Volume (mL)	(%)
Phytoplankton	54	40.9	124.64	27.2
Green algae	23	17.4	30.14	6.6
Blue-green algae	31	23.5	41.6	9.1
Diatoms	37	28.0	51.2	11.1
Euglenoids	3	2.3	1.7	0.4
Zooplankton	53	40.2	40.99	8.9
Cladocera	47	35.6	35.19	7.6
Copepods	2	1.5	1.25	0.3
Rotifers	6	4.5	4.55	1.0
Insects	76	57.6	62.32	13.6
Ephemeroptera	34	25.8	13.5	2.9
Hemiptera	26	19.7	8	1.8
Plecoptera	8	6.1	7.05	1.5
Diptera	53	40.2	33.77	7.4
Macrophytes	50	37.9	134.75	29.4
Detritus	58	43.9	67.9	14.8
Nematodes	47	35.6	26.85	5.8
Unidentified materials	6	4.5	1.55	0.3

The volume of the major food items adds up to 100% in volumetric analysis.