Water Physicochemistry and Zooplankton Fauna of Aiba Reservoir Headwater Streams, Iwo, Nigeria

Table 6

Diversity indices of zooplankton fauna in Aiba Reservoir headwater streams (May 2013–March 2014).

Diversity index	Overall	Upper reaches	Lower reaches	Mann-Whitney   test
				value	value
Aiba stream
Number of species	28	17	19	9	0.1735
Total abundance	12014	1408	10606	3	0.0202
Shannon,	1.624	2.196	1.423	14	0.5752
Simpson, 1-	0.5763	0.8203	0.5271	14	0.5752
Margalef	2.874	2.207	1.942	12	0.3785
Menhinick	0.2555	0.4531	0.1845	18	0.9362
Equitability,	0.4874	0.7749	0.4834	14	0.5752
Onikan stream
Number of species	25	6	24	2	0.0131
Total abundance	6974	198	6776	1	0.0082
Shannon,	1.632	1.735	1.59	4	0.0306
Simpson, 1-	0.5942	0.8148	0.5804	4	0.0306
Margalef	2.712	0.9455	2.607	3	0.0202
Menhinick	0.2994	0.4264	0.2916	12	0.3785
Equitability,	0.5069	0.9684	0.5002	6	0.0656

= 12, critical value of = 5 at < 0.0.