Table 4. Site based diversity indices of study area in the upstream and downstream areas at Koto Panjang Reservoir.

Index	KM	BB	RB	KK	Total
No. of individuals	1701	1370	2135	2811	8017
Richness (S)	18	21	37	35	44
Simpson (1/D)	0.31	0.18	0.22	0.20	0.21
Shanon,s (H’)	1.51	1.95	2.00	2.03	2.10
Eveness_ e ˆH/S	0.25	0.33	0.20	0.22	0.19

Note: KM = Koto Mesjid, BB = Batu Bersurat, RB = Rantau Berangin, KK = Kuok.