Browsing by Author "Narottam P. Sahu"

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    Effect of dietaryHouttuynia cordataleaf meal and leaf extract on the growth performance, nutrient utilization and expression of IGF‐I gene inLabeo rohita
    (Hindawi Limited, 2019-02-11) Chetan K. Garg; Narottam P. Sahu; N. Shamna; Ashutosh D. Deo; Femi J. Fawole; Sarvendra Kumar; Manas K. Maiti
    A 60‐day feeding trial was conducted to evaluate the effects of feeding Houttuynia cordata leaf meal and extract on the growth performance, nutrient utilization and expression of insulin‐like growth factor‐I (IGF‐I) in Labeo rohita fingerlings. Two hundred seventy fingerlings were randomly distributed in six experimental groups in triplicates. Six isonitrogenous (350 g/kg CP) and isocaloric (17 MJ/kg DE) diets were prepared with graded levels of leaf meal (LM) and leaf extract (LE), namely C (control, without LE and LM), LE‐0.25 (2.5 g/kg LE), LE‐0.5 (5 g/kg LE), LE‐1.0 (10 g/kg LE), LM‐1.0 (10 g/kg LM) and LM‐2.0 (20 g/kg LM). Significantly (p < 0.05) higher IGF‐I expression, weight gain %, specific growth rate and lower feed conversion ratio were observed in LM‐1.0 followed by LE‐1.0 group compared to control group. Higher protease activity was observed in LE‐1.0 compared to other experimental groups, while no significant changes were found for amylase and lipase activities. Compared to control, muscle alanine aminotransferase and aspartate aminotransferase activities were significantly higher in treatment groups except for LM‐2.0. These results suggest that either LE‐1.0 or LM‐1.0 can be supplemented in the diet to improve the growth of L. rohita. However, the supplementation of 10 g H. cordata leaf meal/kg feed can be the better option considering the cost of extraction.
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    Effects of Dietary Detoxified Jatropha curcas Protein Isolate on Some Physiological Parameters, Intestine, and Liver Morphology of Labeo rohita Fingerlings
    (Central Fisheries Research Institute (SUMAE), 2022-08-24) Femi J. Fawole; Narottam P. Sahu; Nazeemashahul Shamna; Ayodeji A. Adeoye; Vikas Phulia; Benjamin O. Emikpe
    The rising cost of aquafeed ingredients as global aquaculture expands has led researchers to look for other ingredient sources that are not in conflict with human food. In this regard, this study examined the possibility of incorporating detoxified jatropha protein isolate (JP) into the diet of Labeo rohita (rohu) and the effect on the haematology, innate immunity, and organ integrity. A total of 216 fish (3.25 ± 0.02 g/fish) were randomly distributed in 15 tanks and fed for 60 days. The control diet was formulated with soy protein isolate (SP) and gradually replaced with JP at 25%, 50%, 75%, and 100%. The results showed that the red blood cell (RBC) and haemoglobin (Hb) were not significantly influenced (p > 0.05). White blood cell (WBC) counts registered a significant overall effect and followed a quadratic trend (p = 0.001), while the haematocrit value showed overall significant effects (p < 0.05) but no linear or quadratic trends were observed (p > 0.05). Serum lysozyme activity increased with increasing JP level (p = 0.002), but the total immunoglobulin value was significantly higher in fish fed JP 100. The respiratory burst activity, malondialdehyde (MDA) content, superoxide dismutase, and catalase enzyme activities among the various groups did not differ significantly (p > 0.05). Compared to the control, the photomicrograph of the mid-intestine and liver of fish fed a JP-based diet showed no inflammatory or degenerative changes. In summary, the substitution of SP in the diet with JP improved the innate immunity of L. rohita without any negative impact on the blood profile or the histoarchitectural structure of the liver.
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    Effects of nutraceutical conglomerate on growth and antioxidant status of Labeo rohita fingerlings
    (Elsevier BV, 2021-10) Shamna Naseemashahul; Narottam P. Sahu; Parimal Sardar; Femi J. Fawole
    Four month feeding trial was conducted to evaluate the effect of a vitamin-mineral based nutraceutical conglomerate on Labeo rohita fingerlings (Hamilton, 1822) exposed to different stressors like crowding (normal stocking density NSD, 10 number of fish in 75 L water or high stocking density, HSD, 20 number of fish in 75 L water) and feed restriction (satiation feeding, SF or restricted feeding, RF, at 1% of body weight). One thousand and eighty (1080) fingerlings of Labeo rohita with an average size of 8.5 g ± 0.5 were randomly distributed in 6 distinct experimental groups, viz, THR0 (HSD, RF and 0% nutraceutical), THR1 (HSD; RF; 0.1 % nutraceutical), THR5 (HSD, RF, 0.5 % nutraceutical), TNS0 (NSD, SF and 0% nutraceutical), TNS1 (NSD; SF; 0.1 % nutraceutical) and TNS5 (NSD; SF; 0.5 % nutraceutical). Feeding of nutraceuticals improved the overall growth of the fish both in stress exposed and non-exposed groups. The hepatic antioxidant genes (superoxide dismutase-1, SOD-1; glutathione peroxidase-1, GPx-1) and enzymes (SOD and GPx) showed significantly higher values in stress exposed group (THR0) during the experimental trial in all the four months while catalase gene and enzyme showed a higher activity from 2nd month onwards. Reduced glutathione was found lower at the end of 3- and 4-months trial. Serum total antioxidant status (TAS) was significantly reduced due to stress at the end of each trial period, whereas feeding of 0.1 % nutraceutical increased the TAS in stress exposed groups. Hence, it can be concluded that feeding of 0.1 % nutraceutical conglomerate containing zinc, selenium, vitamin E and methionine could mitigate the crowding and feed restriction- mediated oxidative stress in Labeo rohita fingerlings at the end of 3- and 4-months period. The result of this study will be highly applicable for the production of stunted carp fingerlings for short duration crop in seasonal ponds or water bodies.
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    Heamato-immunological and physiological responses of Labeo rohita fingerlings to dietary fermented Jatropha curcas protein concentrate
    (Elsevier BV, 2017-10) N. Shamna; Parimal Sardar; Narottam P. Sahu; Vikas Phulia; M. Rajesh; F.J. Fawole; Asim K. Pal; G. Angel
    Jatropha protein concentrate (JPC) prepared from jatropha seed cake is toxic due to the presence of phorbol ester and antinutritional factors like tannin, trypsin inhibitor, phytate and non-starch polysaccharides. JPC was detoxified by solid state fermentation (SSF) and a feeding trial of 45 days was conducted to study the response of feeding fermented JPC (FJPC) on growth, haemato-immunological and physiological responses in rohu fingerlings. Seven iso-nitrogenous diets such as control (without JPC or FJPC), J5 (5% JPC), J10 (10% JPC), J20 (20% JPC), FJ5 (5% FJPC), FJ10 (10% FJPC) and FJ20 (20% FJPC) were prepared and fed twice daily. The weight gain and specific growth rate values showed an overall, linear and quadratic trend with similar value recorded in the control and FJ fed groups. Feed efficiency also showed an overall significant effect with a higher feed efficiency value recorded in the control (60.50) group which was similar to FJ (54.21–58.37) fed groups, while JPC fed groups registered the lowest value. The haematological studies showed a significantly (p < 0.05) lower red blood cells (RBC) and heamoglobin in all JPC fed groups and 5% FJPC group compared to control and other FJPC groups. The 10% and 20% JPC fed groups showed the highest blood glucose level than any other groups. Serum total protein and albumin followed similar trend as that of RBC and haemoglobin. The highest globulin value were observed in FJ10 group which was significantly different (P < 0.05) to other groups and lowest value was recorded in J20 group. The superoxide dismutase (SOD) activity in liver was higher in J20, while in muscle, J10 and J20 registered the highest value compared to other groups (p < 0.05). Our study revealed that protein concentrate prepared from Jatropha cake cannot be fed directly to rohu without detoxification and solid state fermentation appears to be an ideal approach. Overall, FJPC can be utilized in the diet of rohu at 20% without any detrimental effect on heamato-immunological and physiological response.