Impact of periphyton on makhana (Euryale ferox Salisbury) cum fish culture: a study in North Bihar, India

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Table 3

The fish growth parameters and yield.

Fish	Growth parameter	Treatments

		MF1	MF2	MF3	MF4	MF5	MF6
Catla catla	Initial mean weight (g fish⁻¹)	5.41 ± 0.28^a	4.78 ± 0.67 ^a	4.81 ± 0.75 ^a	4.07 ± 0.22 ^a	5.03 ± 0.15 ^a	5.20 ± 0.17 ^a
	Final mean weight (g fish⁻¹)	477.60 ± 2.51^a	479.66 ± 1.52^a	487 ± 2.64^b	571.66 ± 2.88^c	574 ± 1.73^c	571.65 ± 2.88^c
	Specific growth rate (%)	2.97 ± 0.04^a	3.03 ± 0.10^a	3.04 ± 0.11^a	2.99 ± 0.03^a	3.11 ± 0.02^a	3.04 ± 0.07^a
	Harvested fish count (no.)	958.66 ± 3.21^a	980 ± 9.16^b	1026 ± 21.6^c	1729.33 ± 1.15^e	1726.67 ± 4.16^e	1682 ± 2.64^d
	Survival (%)	39 ± 0.57^a	41.43 ± 0.83^b	42.33 ± 0.57^b	71.66 ± 0.57^d	72.33 ± 0.57^d	70.06 ± 0.11^c
	Fish yield (t ha⁻¹ yr⁻¹)	0.45 ± 0.006^a	0.45 ± 0.018^a	0.49 ± 0.006^b	0.98 ± 0.006^d	0.99 ± 0.004^d	0.95 ± 0.01^c
Labeo rohita	Initial mean weight (g fish⁻¹)	5.16 ± 0.69 ^a	4.19 ± 0.08 ^a	3.99 ± 0.38 ^a	4.90 ± 0.05 ^a	4.66 ± 0.57 ^a	4.4 ± 0.20 ^a
	Final mean weight (g fish⁻¹)	509.77 ± 9.40^a	508.33 ± 7.63^a	564.33 ± 5.1^b	631.66 ± 2.88^e	602.3 ± 2.51^c	613.7 ± 2.30^d
	Specific growth rate (%)	3.02 ± 0.08^b	2.89 ± 0.02^a	2.99 ± 0.05^ab	3.07 ± 0.006^b	3.20 ± 0.08^c	3.24 ± 0.03^c
	Harvested fish count (no.)	1076 ± 25.16^a	1121.33 ± 7.09^b	1411.66 ± 10.21^c	1560.67 ± 0.57^e	1461 ± 34.65^d	1488.6 ± 1.15^d
	Survival (%)	45.3 ± 0.57^a	46.28 ± 0.63^a	59.66 ± 0.57^bc	64 ± 1.73^d	59.34 ± 1.15^b	61.3 ± 1.20^c
	Fish yield (t ha⁻¹ yr⁻¹)	0.5508 ± 0.076^a	0.575 ± 0.005^b	0.79 ± 0.002^c	0.98 ± 0.004^f	0.8702 ± 0.006^d	0.91 ± 0.005^e
Cirrhinus mrigala	Initial mean weight (g fish⁻¹)	2.2 ± 0.72^a	1.83 ± 0.05^a	2.06 ± 0.06^a	2.9 ± 0.34^a	1.9 ± 0.1^a	1.56 ± 0.05^a
	Final mean weight (g fish⁻¹)	93.66 ± 5.5^a	91.6 ± 2.88^a	119.66 ± 1.52^b	161.7 ± 2.88^cd	155 ± 0.57^c	163.2 ± 5.77^d
	Specific growth rate (%)	2.48 ± 0.21^a	2.57 ± 0.03^a	2.67 ± 0.01^a	2.64 ± 0.09^a	2.89 ± 0.03^b	3.05 ± 0.02^b
	Harvested fish count (no.)	384.3 ± 4.50^a	409 ± 3.60^b	482.33 ± 2.51^c	578.3 ± 2.08^d	599 ± 2.64^e	567.30 ± 2.51^f
	Survival (%)	31.66 ± 0.57^a	34.45 ± 0.47^b	40.5 ± 0.31^c	48.26 ± 0.20^d	51 ± 12^e	47.3 ± 0.21^d
	Fish yield (t ha⁻¹ yr⁻¹)	0.034 ± 0.004^a	0.069 ± 0.004^b	0.0579 ± 0.003^c	0.092 ± 0.005^de	0.093 ± 0.002^e	0.091 ± 0.006^d

Values are given as mean ± SD of six treatments of each fish species. Values share a common superscript (a,b,c,d, and e) and differ significantly at p<0.05 post-hoc Duncan's multiple range test. The specific growth rate was calculated as SGR = 100 × (ln final weight − ln initial weight)/days and Survival (%) = (Number of fish harvested/Number of fish stocked) × 100.

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