Influence of stocking ratios on production and stress indicators in Channa striata and Heteropneustes fossilis polyculture systems

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Table 6

Injury assessment of Channa striata and Heteropneustes fossilis under different stocking ratio treatments (mean ± SE).

Species	Parameter	Sampling Day	T1 (1:1)	T2 (3:7)	T3 (7:3)
C. striata	Spine injury score	Day 1	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00
		Day 14	0.12 ± 0.03 ^a	0.24 ± 0.05^b	0.48 ± 0.07 ^c
		Day 28	0.26 ± 0.05 ^a	0.52 ± 0.08 ^b	1.05 ± 0.12 ^c
		Day 56	0.42 ± 0.08 ^a	0.89 ± 0.12 ^b	1.75 ± 0.18 ^c
	Body injury score	Day 1	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00
		Day 14	0.09 ± 0.02 ^a	0.20 ± 0.04 ^b	0.39 ± 0.06 ^c
		Day 28	0.21 ± 0.04 ^a	0.44 ± 0.07 ^b	0.85 ± 0.11 ^c
		Day 56	0.35 ± 0.07 ^a	0.73 ± 0.10 ^b	1.42 ± 0.15 ^c
	Injury incidence (%)	Day 1	0.0 ± 0.0	0.0 ± 0.0	0.0 ± 0.0
		Day 14	8.2 ± 1.2 ^a	15.4 ± 1.5 ^b	22.8 ± 1.8 ^c
		Day 28	16.7 ± 2.0 ^a	30.2 ± 2.6 ^b	42.5 ± 3.1 ^c
		Day 56	27.5 ± 2.8 ^a	48.6 ± 3.4 ^b	64.3 ± 3.9 ^c

H. fossilis	Self-inflicted injury score	Day 1	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00
		Day 14	0.11 ± 0.02 ^a	0.42 ± 0.06 ^c	0.26 ± 0.05 ^b
		Day 28	0.23 ± 0.04 ^a	0.88 ± 0.10 ^c	0.56 ± 0.08 ^b
		Day 56	0.38 ± 0.06 ^a	1.53 ± 0.16 ^c	0.95 ± 0.12 ^b
	Predatory injury score	Day 1	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00
		Day 14	0.13 ± 0.03 ^a	0.19 ± 0.04 ^b	0.52 ± 0.07 ^c
		Day 28	0.27 ± 0.05 ^a	0.41 ± 0.06 ^b	1.09 ± 0.13 ^c
		Day 56	0.44 ± 0.08 ^a	0.67 ± 0.09 ^b	1.86 ± 0.19 ^c
	Injury incidence (%)	Day 1	0.0 ± 0.0	0.0 ± 0.0	0.0 ± 0.0
		Day 14	10.2 ± 1.3 ^a	24.5 ± 2.0 ^c	21.9 ± 1.8 ^b
		Day 28	19.8 ± 2.2 ^a	47.3 ± 3.2 ^c	42.6 ± 3.0 ^b
		Day 56	32.4 ± 3.1 ^a	72.8 ± 4.5^c	65.2 ± 4.1 ^b

Note: Injury scores were assessed on a scale of 0-3, where 0 = no injury, 1 = mild injury, 2 = moderate injury, and 3 = severe injury. Different superscripts in the same row indicate significant differences (p < 0.05).

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