Table 2. Some population parameters of Bonionotus gonionotus, Osteochilus vittatus, and Oreochromis niloticus in the Widas Reservoir Madiun Regency, East Java

Fish species	L∞ (cm)	K = (year−1)	M = (year−1)	Z = (year−1)	F = (year−1)	E
B. gonionotus	45	0.63	1.24	4.78	3.54	0.74
O. niloticus	44.4	0.7	1.30	7.55	6.25	0.83
O. vittatus	29	0.55	1.25	3.70	2.45	0.66