Effect of dietary
            Houttuynia cordata
            leaf meal and leaf extract on the growth performance, nutrient utilization and expression of IGF‐I gene in
            Labeo rohita

A 60-days feeding experiment was conducted to evaluate the utilisation of sweet potato leaf meal (SPLM) for replacement of de-oiled rice bran (DORB) in the diets of rohu Labeo rohita (Hamilton, 1822) fingerlings. SPLM has good protein content (22.12%) and digestible energy content (11.81 MJ kg-1). Five iso-nitrogenous (30%) and iso-caloric diets (13.5 MJ kg-1) were prepared by replacing DORB with sweet potato leaf meal (SPLM) at 0% (C), 25% (T1), 50% (T2), 75% (T3) and 100% (T4). Each dietary treatment was tested in triplicates with 12 fingerlings per tank, following completely randomised design. The growth performance and feed utilisation parameters viz., weight gain % (WG), specific growth rate (SGR), protein efficiency ratio (PER) and feed conversion ratio (FCR) were not significantly different (p>0.05) among treatments. The digestive enzyme activity remained unaffected except amylase activity, which increased significantly in 50% SPLM replacement group (T2). Chymotrypsin decreased significantly (p<0.05) in the treatment groups. Metabolic enzymes viz., ATPase activity of liver increased significantly (p<0.05) whereas ALP (alkaline phosphatase) activity in the intestine had irregular pattern. The present study indicates that DORB can be completely replaced by SPLM without affecting growth performance and digestive enzyme activity in the diet of L. rohita.

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Evaluation of Houttuynia cordata Thunb. leaf extract on growth performance, feed utilization, and hematological indices of hybrid catfish (Clarias macrocephalus × Clarias gariepinus)

Comparative Clinical Pathology ◽

10.1007/s00580-018-2686-5 ◽

2018 ◽

Vol 27 (4) ◽

pp. 947-958 ◽

Cited By ~ 1

Author(s):

Paiboon Panase ◽

Lalita Khuangbun ◽

Theerawat Suphason ◽

Prameda Tipdacho

Keyword(s):

Growth Performance ◽

Leaf Extract ◽

Clarias Gariepinus ◽

Feed Utilization ◽

Houttuynia Cordata ◽

Hematological Indices ◽

Hybrid Catfish ◽

Clarias Macrocephalus ◽

Houttuynia Cordata Thunb

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Impact of dietary leaf extracts of Black pepper Piper nigrum L. on the growth, hematological and immunological parameters of Labeo rohita (Hamilton, 1822) cultured in glass aquaria

Brazilian Journal of Biology ◽

10.1590/1519-6984.246825 ◽

2023 ◽

Vol 83 ◽

Author(s):

A. Ullah ◽

H. Azmat ◽

Z. Masood ◽

F. Arooj ◽

S. M. Hussain ◽

...

Keyword(s):

Immune Response ◽

Growth Performance ◽

Proximate Composition ◽

Leaf Extract ◽

Labeo Rohita ◽

Hematological Parameters ◽

Black Pepper ◽

Piper Nigrum ◽

Total Hardness ◽

Average Weight

Abstract A study was conducted to evaluate the effect of Piper nigrum (black pepper) leaf extract on on the growth performance, proximate composition, hematological parameters, and immune response of Labeo rohita fingerlings with an average weight of 22.14 ± 0.98g. Aftrer acclimation for two weeks, fish (n=25) were randomly selected and placed in four glass aquaria (T0, T1, T2 and T3) at constant water temperature (30.0 ± 1.0 °C), pH (7.50 ± 0.5) and total hardness (200 ± 2.0 mgL,-1) for a period of 12 weeks, with three replicates each. Fish were fed with P. nigrum leaf extract supplemented feed @ 0.0%, 1.0%, 2.0% and 3.0% in T0, T1,T2 and T3, respectively. At the end of experiment, five fish were randomly selected from each aquaria for proximate composition, gut and skin microbial load, hematological parameters. Total proteins, albumins, and globulins were also recorded to evaluate immunological memory. The result revealed that fish in T2 showed better growth performance with an average weight gain of 56.11 ± 0.51 g. Thus, it had been concluded that Piper nigrum, a medicinal plant, can also be used to enhance the growth performance and immune response of Labeo rohita as attractive alternatives against antibiotics and vaccines and has shown no negative side effects on fish health as well as on its environment.

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