3. RESULTS

Production results of African magur and other carps, (silver carp, catla, mrigal and mirror carp) obtained in the different culture systems are presented in Table-VI and Fig.1.

The culture period, in different culture systems, ranged from a minimum of 60 days (Gochihata AFL; Pond No.5) to a maximum of 129 days (Natore FSMF; Pond No.4). The maximum net production of 4740 kg/ha/103 days (14.2 t/ha/yr. in 3 crops) was obtained in magur monoculture system in pond no.6 at Natore FSMF and the minimum net production of 2908 kg/ha/129 days (7.3 t/ha/yr. in 2.5 crops) was obtained in magur-chicken integrated culture systems in pond no.4 at Natore FSMF (Table VI).

The growth of African magur, as indicated by the increase in average weight of fish sampled in the different days during the culture period, until harvest, under the different culture systems, are presented in Table VII. The results are also shown graphically in Fig. 2.

The growth rate of magur ranged from a minimum of 1.56 g/day to a maximum of 3.94 g/day with an average of 3.12 g/day (Table-VII). The maximum growth rate of magur (3.94 g/day) was observed in polyculture system in pond no.2 at Jessore FSMF. The minimum growth rate (1.56 g/day) was found in magur-chicken integrated system (pond no.4) at Natore FSMF.

The apparent Feed Conversion Ratio (FCR) and feed cost under different magur culture systems are given in Table-VIII)

TABLE - VI: PRODUCTION DETAILS UNDER DIFFERENT CULTURE TECHNIQUES

Fish Farm and Culture System	Pond area (m²)	Date of harvest	Species	Fish harvested (No.)	Survival (%)	Av.wt. (g)	Gross total wt.(kg)		Net total wt.(kg)		Culture period (day)	Estimated Net Production t/ha/yr
Fish Farm and Culture System	Pond area (m²)	Date of harvest	Species	Fish harvested (No.)	Survival (%)	Av.wt. (g)	Pond	Hectare	Pond	hectare	Culture period (day)	Estimated Net Production t/ha/yr
1. Faridpur FTECMagur dominated Polyculture	1090	14-Dec-90	A. Magur	1044	75	327	341	3128	334	3066	94	12 in 3 crops
			S.carp	83	79	542	45	413	44	403	94
			Mrigal	678	90	85	58	532	52	480	94
			M.carp	4	80	1775	7	64	7	61	79
			Total	1009			451	4137	437	4010
2. Jessore FSMF Magur dominated Polyculture	1420	29-Dec-90	A. Magur	1012	83	436	441	3106	433	3052	109	10 in 3 crops
			S. carp	26	52	146	4	28	2	16	95
			Catla	150	88	365	55	387	42	296	95
			Total	1188			500	3521	477	3364
3. Tongi FSMF Magur-Chicken Integrated	1335	19-Dec-90	A. Magur	823	51	358	295	2210	281	2105	115	8.2 in 2.5 crops
			S.carp	327	100	581	190	1423	132	987	111
			Catla	110	99	445	49	367	27	201	111
			Total	1260			534	4000	440	3293
4. Natore FSMF Magur-Chicken Integrated	2500	08-Mar-91	A. Magur	2004	67	203	407	1628	401	1604	129	7.3 in 2.5 crops
			S.carp	635	90	600	381	1524	262	1048	127
			Catla	256	97	348	89	356	64	256	127
			Total	2895			877	3508	727	2908
5. Gachihata AF Ltd. Magur-Chicken Integrated	3050	10-Nov-91	A.Magur	5172	52	180	931	3052	927	3040	60	15 in 4.5 crops
			S.carp	265	88	332	88	289	76	249	60
			Catla	95	95	242	23	75	18	59	60
			Total	5532			1042	3416	1021	3348
6. Natore FSMF Magur Monoculture	225	21-Dec-90	A.Magur	271	60	398	108	4800	107	4740	103	14.2 in 3 crops
7. Biman Poultry Complex, Savar Magur Monoculture	2200	27-Jul-91	A. Magur	3785	38	209	791	3595	786	3573	66	14.3 in 4 crops

Magur Polyculture, Faridpur FTEC
Magur Polyculture, Jessore FSMF
Magur Integrated, Tongi FSMF
Magur Integrated, Natore FSMF
Magur Integrated, Gachihata AFL
Magur Monoculture, Natore FSMF
Magur Monoculture, Biman Savar

Fig.1. Fish Production (t/ha/yr) under various Culture System

TABLE-VII: GROWTH RATE OF AFRICAN MAGUR UNDER DIFFERENT CULTURE SYSTEMS

1. Faridpur FTEC Magur Polyculture		2. Jessore FSMF Magur Polyculture		3. Tongi FSMF Magur Integrated Poly.		4. Natore FSMF Magur Integrated Poly.		5. Gachihata A.F.Ltd. Magur Integrated Poly.		6. Natore FSMF Magur Monoculture		7. Biman PC, Savar Magur Monoculture
Culture Period (day)	Average Weight (g)	Culture Period (day)	Average Weight (g)	Culture Period (day)	Average Weight (g)	Culture Period (day)	Average Weight (g)	Culture Period (day)	Average Weight (g)	Culture Period (day)	Average Weight (g)	Culture Period (day)	Average Weight (g)
1	5	1	6.5	1	7	1	2	1	0.4	1	3	1	0.5
8	15	15	76	7	13	15	12	7	5	6	8	15	20
16	36	23	100	15	36	31	40	14	12	13	30	30	65
24	61	39	180	25	50	61	116	21	20	33	112	45	112
36	100	47	200	35	100	80	142	28	35	43	167	66	209
45	175	56	300	53	124	122	184	35	60	54	267
56	220	77	400	57	140	129	203	42	81	77	350
73	270	109	436	65	207			49	126	105	398
94	327			79	265			56	166
				90	314			60	180
				100	331
				110	342
				115	358
Growth rate of magur (g/day)
3.42		3.94		3.05		1.56		2.99		3.76		3.16
Average growth rate of magur : 3.12 g/day

Fig.2. Growth of African Magur under various culture systems

TABLE-VIII: FEED COST AND FEED CONVERTION RATIO

Fish Farm and Culture System	Pond Area (m²)	Amount of feed given (kg)	Cost of feed		Net fish produced (kg)	Feed Convertion Ratio (FCR)
Fish Farm and Culture System	Pond Area (m²)	Amount of feed given (kg)	Total (Tk.)	Per kg (Tk/kg)	Net fish produced (kg)	Feed Convertion Ratio (FCR)
1. Faridpur FTEC Magur dominated Polyculture	1090	1545	6129	3.97	437	3.53:1
2. Jessore FSMF Magur dominated Polyculture	1420	1349	10578	7.84	477	2.83:1
3. Tongi FSMF Magur-Chicken Integrated Polyculture	1335	2387	13742	5.76	440	5.42:1
4. Natore FSMF Magur-Chicken Integrated Polyculture	2500	649	4228	6.51	727	0.89:1
5. Gachihata AF Ltd. Magur-Chicken Integrated Polyculture	3050	1304	6847	5.75	1021	1.28:1
6. Natore FSMF Magur Monoculture	225	572	4152	7.26	107	5.35:1
7. Biman Poultry Complex, Savar Magur Monoculture	2200	3830	11860	3.10	786	4.87:1

The chicken sub-system alone did not come out with profitable results. Out of two batches of broiler chicken at Tongi FSMF, the second batch made a minimum profit of 7.5% over operating cost. The layer chicken at two demonstration ponds (Natore FSMF and Gachihata A.F. Ltd.) could not make profit. The detailed results of chicken sub-systems in three demonstration ponds are given in Table IX and X.

Costs of production and cost benefit analyses of magur under the different culture systems are also presented in Tables IX and X.