Body composition, growth performance and enzyme activities of <i>Labeo rohita</i> fed different commercial fish feeds

Abbas, S.; Iqbal, Asia; Anjum, K. M.; Sherzada, S.; Atique, U.; Khan, M. K. A.; Akmal, M.; Rahman, A.; Asif, A. R.; Ahmad, S.; Malik, A.; Khan, S. A.; Ahmad, S.; Inayat, M.

doi:10.1590/1519-6984.250402

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Brazilian Journal of Biology

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Original Article • Braz. J. Biol. 83 • 2023 • https://doi.org/10.1590/1519-6984.250402 copy

Body composition, growth performance and enzyme activities of Labeo rohita fed different commercial fish feeds

Composição corporal, desempenho de crescimento e atividades enzimáticas de diferentes alimentos para peixes comerciais alimentados por Labeo rohita

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

We have evaluated the effects of different fish feeds on the body composition, growth, and enzyme activities of Labeo rohita (Rohu). In total, 240 fishes between the average weights of 24.77±2.15g were studied. The treatments were applied in a completely randomized design, with 4 treatments of 60 fishes each. Treatments consisted of four different fish feeds [Oryza (T1), AMG (T2), Aqua (T3), and Supreme (T4)]. Body composition, growth performance, and enzyme activities were evaluated. There was a significant variation in performance of fishes fed with different type of feed; as fishes having Oryza feed showed the highest weight gain, specific growth rate (SGR), and best feed conversion ratio (FCR) as compared to other groups that were considered to be significant (P ≤ 0.05). High net weight gain was obtained in T4 when compared with T2 and T3. FCR value of T4 was less than T1 but higher than T2, T3 and T2, which showed the lowest values. The specific growth rate was recorded as average in T4, but T2 led a high SGR than T3. Similarly, crude protein level and digestive enzymes activity was recorded significantly highest in fed with Oryza (T1) as compared to AMG (T2), Aqua (T3), and Supreme (T4). Water quality parameters were recorded significant in all treatments except pH and DO of treatment (T1), significantly different from other treatments. It was concluded that Rohu (Labeo rohita) could show a promising growth rate and protease enzyme activity when fed with the Oryza feed of 25% protein.

Keywords:
commercial fish feeds; growth; body composition; enzyme activity; Rohu

Experimental Diets	DM (%)	M (%)	CP (%)	CF (%)	CBF (%)	Ash (%)
Oryza	92.2	7.8	25.20	3.12	9.45	20.2
AMG	93.1	6.9	22.20	4.44	8.38	23.6
Aqua	91.7	8.3	24.23	6.63	6.97	27.8
Supreme	94.8	5.2	22.40	4.44	8.38	25.8

Treatments	T1	T2	T3	T4	P-value
Initial Weight (g)	24.77±0.44	24.20±0.10	24.05±0.03	24.72±0.06	NS
Final Weight (g)	38.20±0.07^a	34.60±0.01^c	33.95±0.26^c	36.57±0.15^b	^* * = P≤0.01;
Net weight gain (g)	14.00±0.03^a	9.82±0.42^c	9.89±0.29^c	11.85±0.09^b	^ = P≤0.001.
Weight gain (%)	57.86±0.36^a	40.17±2.43^c	41.15±1.24^c	47.94±0.23^b	**
FCR	1.06±0.04^a	1.40±0.01^c	1.34±0.03^a	1.20±0.002^b	*
SGR (%)	0.50±0.02^a	0.37±0.13^c	0.35±0.07^c	0.43±0.01^ab	*

Treatments	Initial	T1	T2	T3	T4	P-value
Dry matter %	23.02±0.02^a	25.50±0.035^a	25.50±0.04^a	25.97±0.10^a	26.23±0.16^a	**
Crude Protein %	13.69±0.30^b	17.47±0.27^a	16.29±0.10^b	16.50±0.25^b	16.48±0.06^b	^* ***** = P≤0.001.
Crude Fat %	2.40±0.04^c	3.60±0.11^ab	4.02±0.04^a	3.86±0.08^a	3.13±0.12^b	**
Ash %	4.80±0.25^a	2.79±0.14^d	3.15±0.32^c	3.27±0.12^c	3.82±0.14^b	^ = P≤0.01;
Nitrogen free Extract	2.13±0.11^b	1.63±0.20^b	2.25±0.28^ab	2.34±0.05^a	2.78±0.36^a	^* * = P≤0.05;

Treatments	T1	T2	T3	T4	P-value
Amylase (mg protein)	14.34±0.06^a	13.27±0.10^b	12.26±0.30^c	13.11±0.29^b	^* * = P≤0.01;
Protease (ml enzyme)	15.09±0.03^a	13.21±0.05^b	10.19±0.32^c	11.75±0.36^c	^ = P≤0.001.
Lipase (ml enzyme)	0.82±0.004^a	0.77±0.01^b	0.80±0.01^a	0.80±0.002^a	*

Growth Parameters	F Value	Pr > F
Initial Weight (g)	0.14	0.9356
Final Weight (g)	56.41	< 0.0001
Net weight gain (g)	8.26	0.0006
Weight gain (%)	22.10	< 0.0001
FCR	9.51	0.0003
SGR (%)	5.98	0.0034
Proximate Composition
Dry matter %	57.75	< 0.0001
Crude Protein %	28.78	< 0.0001
Crude Fat %	20.06	< 0.0001
Ash %	2.97	0.0351
Nitrogen free Extract	9.17	< 0.0001
Digestive Enzyme Activity
Amylase (mg protein)	13.27	< 0.0001
Protease (ml enzyme)	29.76	< 0.0001
Lipase (ml enzyme)	6.41	0.0024

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[1] *e-mail: shahid.sherzada@uvas.edu.pk