Abstract: Aquaculture on a global scale increases at a growing rate of 6 % annually and has been gaining importance over capture fisheries since 1990s (Reverter et al., 2014). A wide range of disease out-breaks in aquaculture are due to poor culture practices, overcrowding of fishes, poor quality of water etc. Hence it has resulted in vast loss of production (Gabriel et al., 2015). Plants are widely employed for conventional chemotherapeutics and antibiotics (Vasseharan and Thaya, 2014). Compared to vaccines, plant extracts act as better immunostimulants as they protect the fishes against a wide range of infectious agents (Anderson, 1992). In the present study, peanut or groundnut (Arachis hypogaea) has been considered not only as a highly nutritious food source for human beings but also an alternative to feed and as a potent immune stimulator. The specimens of Cyprinus carpio were obtained from a private fish farm, Chidambaram, Tamilnadu, India and used as experimental models. Hence the present study aimed at an evaluation of the presence of different phytochemicals along with antimicrobial activity obtained from stem, leaf and seed of Arachis hypogaea.
Keywords: Arachis hypogaea, Cyprinus carpio, Aeromonas hydrophilia, enzyme assay