Publications by authors named "Veeran Srinivasan"

The present study investigated the dietary fishmeal replacement by marine red seaweed (Halymenia dilatata) meal (RSM) on growth performance, feed utilization, chemical body composition, hematological constituents, digestive, antioxidant, and metabolic enzymes in freshwater fish Labeo rohita (Rohu) fingerlings. The fish were fed with RSM-free control diet (RSM0) and four experimental diets, which replaced fish meal (FM) with varying levels of RSM (25%, 50%, 75%, and 100%, represented as RSM25, RSM50, RSM75, and RSM100 respectively). After a 60-day feeding trial, the survival rate (SR), growth performance (length gain, weight gain, and specific growth rate), protein efficiency ratio, chemical body composition (protein, lipid, and ash), and digestive enzymes (amylase and protease) were significantly increased (P < 0.

View Article and Find Full Text PDF
Article Synopsis
  • Green synthesized silver nanoparticles (AgNPs), made from onion peel extract and ionic silver, were found to be toxic to aquatic species like common carp (Cyprinus carpio).
  • Toxicity assessments included checking for blood changes, oxidative stress, tissue damage, and gene expression after exposing fish to different AgNP concentrations for 96 hours and then sublethal concentrations for 28 days.
  • Accumulation of silver in fish organs like gills, liver, and muscle led to significant physiological changes, indicating the potential harmful effects of biogenic AgNPs on fish health and aquatic ecosystems.
View Article and Find Full Text PDF

There is a growing concern nowadays over the exposure of nanomaterials and their effects in aquatic life. In spite of reporting the changes in physiology, reproduction and behaviour in fish by different nanoparticles, the molecular events underlying in the aquatic bodies due to the toxicity of zinc oxide nanoparticles (ZnO NPs) are mainly unexplored. Therefore, the present study carried out an ex vivo exposure of ZnO NPs at various concentrations (0.

View Article and Find Full Text PDF

The present study investigated the effects of Aquamin® mineral mixture (AQMM) and Agrimin® mineral mixture (AGMM) supplemented diets on growth and chemical composition of juvenile freshwater prawn Macrobrachium malcolmsonii (H. Milne-Edwards, 1844). Experimental diets containing 6 different AQMM levels (Trial 1: 0, 0.

View Article and Find Full Text PDF

Nanotechnology tends to be a swiftly growing field of research that actively influences and inhibits the growth of bacteria/cancer. Noble metal nanoparticles (NPs) such as silver, copper, and gold have been used to damage bacterial and cancer growth over recent years; however, the toxicity of higher NPs concentrations remains a major issue. The copper oxide nanoparticles (CuONPs) were therefore fabricated using a simple green chemistry approach.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates the skin mucus of three freshwater fish species—common carp, mrigal, and rohu—focusing on how different pH levels affect the extraction and activity of mucus proteins.
  • It uses methanol to extract these proteins, analyzing their profiles via SDS-PAGE and assessing the activity of immune enzymes like lysozyme, alkaline phosphatase, and protease at varying pH levels.
  • Results show that mrigal skin mucus at pH 8.0 exhibits the highest enzyme activity and bactericidal effectiveness against pathogens, suggesting its potential for identifying beneficial bioactive compounds.
View Article and Find Full Text PDF

This study was performed to assess the growth-promoting potential of dietary magnesium oxide nanoparticles (MgO NPs) in Macrobrachium rosenbergii post-larvae (PL). MgO NPs were supplemented at 0, 100, 200, 300, 400 and 500 mg kg with the basal diet (containing 0.95 g Mg kg); the concentrations of Mg in MgO NP-supplemented diets were increased correspondingly (1.

View Article and Find Full Text PDF

The present study was performed to assess the effects of dietary supplementation of copper nanoparticles (Cu-NPs) on growth, biochemical constituents, digestive enzyme activities, antioxidant, metabolic enzyme levels, and non specific immune response of the freshwater prawn, Macrobrachium rosenbergii post larvae (PL). The Cu-NPs (200 nm) were synthesized by facile and environmental friendly hydrothermal method. Cu-NPs were supplemented at 0, 10, 20, 40, 60, and 80 mg kg(-1) with the basal diets.

View Article and Find Full Text PDF

The present study was conducted to assess the influence of dietary zinc nanoparticles (size 50 nm) on the growth, biochemical constituents, enzymatic antioxidant levels and the nonspecific immune response of the freshwater prawn, Macrobrachium rosenbergii post larvae (PL). The concentrations of dietary supplement zinc nanoparticles (ZnNPs) were 0, 10, 20, 40, 60 and 80 mg kg(-1) with the basal diet, and the level of Zn in ZnNP-supplemented diets were 0.71, 10.

View Article and Find Full Text PDF