Browsing by Author "Manjappa, N.K."

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Comparative analysis of biometrical and reproductive indices, proximate composition, and hemato-biochemical variables of cuchia eel Monopterus cuchia (Hamilton, 1822) from six different localities of Bangladesh
(2024) Nandi, S.K.; Al Mamun, M.A.; Suma, A.Y.; Abdul Kari, Z.; Wei, L.S.; Tahiluddin, A.B.; Manjappa, N.K.; Nasren, S.; Saha, S.; Téllez-Isaías, G.; Bottje, W.G.; Kabir, M.A.
Cuchia eel () is among the most sought-after freshwater fish, owing to its exceptional nutritional profile and high consumer demand. The current research aimed to establish baseline data by comparing the proximate composition, hematological, and plasma biochemical indices of Cuchia eel populations across six different geographical locations in Bangladesh: Bogra, Haluaghat, Jamalpur, Moktagacha, Sylhet, and Tangail. By examining these parameters, we aim to gain valuable insights into the nutritional benefits, physiological responses, and potential adaptations of this species to varying environments. The statistical analysis revealed no significant ( > 0.05) variances in the whole-body proximate composition of the fish captured from distinct areas. However, it was observed that different geographical regions had remarkable impacts on the variations of the majority of the hematological parameters, except for some cases. Additionally, there was a notable ( < 0.05) increase or decrease in most of the serum biochemical contents in certain localities as compared to others in this study. Light microscopic examination of Cuchia eel blood smears exhibited lower numbers but larger sizes of RBCs. The findings of this study lead to the conclusion that different localities had significant impacts on the hematology and blood biochemical indices of Cuchia eel, even though the whole-body proximate composition showed no significant variations. This research contributes to a deeper understanding of the physiological aspects of Cuchia eel.
Comparative analysis of biometrical and reproductive indices, proximate composition, and hemato-biochemical variables of cuchia eel Monopterus cuchia (Hamilton, 1822) from six different localities of Bangladesh
(Elsevier Ltd, 2024) Nandi, S.K.; Al Mamun, M.A.; Suma, A.Y.; Abdul Kari, Z.; Wei, L.S.; Tahiluddin, A.B.; Manjappa, N.K.; Nasren, S.; Saha, S.; Téllez-Isaías, G.; Bottje, W.G.; Kabir, M.A.
Cuchia eel (Monopterus cuchia) is among the most sought-after freshwater fish, owing to its exceptional nutritional profile and high consumer demand. The current research aimed to establish baseline data by comparing the proximate composition, hematological, and plasma biochemical indices of Cuchia eel populations across six different geographical locations in Bangladesh: Bogra, Haluaghat, Jamalpur, Moktagacha, Sylhet, and Tangail. By examining these parameters, we aim to gain valuable insights into the nutritional benefits, physiological responses, and potential adaptations of this species to varying environments. The statistical analysis revealed no significant (P > 0.05) variances in the whole-body proximate composition of the fish captured from distinct areas. However, it was observed that different geographical regions had remarkable impacts on the variations of the majority of the hematological parameters, except for some cases. Additionally, there was a notable (P < 0.05) increase or decrease in most of the serum biochemical contents in certain localities as compared to others in this study. Light microscopic examination of Cuchia eel blood smears exhibited lower numbers but larger sizes of RBCs. The findings of this study lead to the conclusion that different localities had significant impacts on the hematology and blood biochemical indices of Cuchia eel, even though the whole-body proximate composition showed no significant variations. This research contributes to a deeper understanding of the physiological aspects of Cuchia eel.
Effects of dietary supplementation of natural Spirulina on growth performance, hemato-biochemical indices, gut health, and disease resistance to Aeromonas hydrophila of Stinging catfish (Heteropneustes fossilis) fingerling
(2023.01.01) Rahman, M.; Mamun, M.A.A.; Rathore, S.S.; Nandi, S.K.; Kari, Z.A.; Wei, L.S.; Tahiluddin, A.B.; Rahman, M.M.; Manjappa, N.K.; Hossain, A.; Nasren, S.; Alam, M.M.M.; Bottje, W.G.; Téllez-Isaías, G.; Kabir, M.A.
Spirulina is a popular edible blue-green alga that has piqued the interest of aqua-feed formulations due to its high concentration of micronutrients, macronutrients, and antioxidants. To investigate the impacts of natural Spirulina as a feed additive on Stinging catfish (Heteropneustes fossilis) growth, feed utilization, hematology and serum biochemistry, gut morphology, as well as disease resistance to Aeromonas hydrophila, a 60-day feeding experiment was performed. The fish (N = 240), with an initial weight of 4.23 +/- 0.50 g, were placed in 12 aquaria tanks (100 L/ tank) and fed twice daily until they were satisfied. Four different experimental diets: 0% (D0, control diet), 1% (D1), 3% (D2), and 5% (D3) natural Spirulina meal were used to feed the fish. This study found that Stinging catfish fed with a 5% Spirulina diet obtained notably higher (p < 0.05) specific growth rate, final weight, weight gain, and average daily weight gain than other supplemented regimens. Furthermore, as Spirulina inclusion in diets increased, feed utilization parameters such as feed conversion ratio and protein efficiency ratio improved remarkably (p < 0.05). Red blood cell, white blood cell, lymphocytes, neutrophil, monocytes, basophil, hemoglobin, red cell distribution width-standard deviation, and mean corpuscular hemoglobin were all substantially (p < 0.05) greater in 5% Spirulina diet-fed fish. The basal diet-fed fish had lower (p < 0.05) total protein, globulin, and albumin levels and higher glucose, cholesterol, and triglyceride levels than those fed with other test diets. Compared to other fish groups, light microscopic examination of intestinal tissues revealed that fish fed 3% and 5% Spirulina had well-organized enterocytes, intact epithelial barrier, abundant goblet cells, and lacking luminal cell debris, as well as exhibited no signs of inflammation (edema). Spirulina diets significantly (p < 0.05) affected intestinal villi height and width, mucosa width, crypt depth, villi, and lumen area. Furthermore, a 5% Spirulina diet-fed fish demonstrated remarkably (p < 0.05) greater resistance (68.57%) to A. hydrophila during the bacterial challenge trial. Based on the findings, applying natural Spirulina powder at 5% in diets as a feed supplement could benefit H. fossilis nutrient utilization, growth performance, health status, as well as disease resistance.