• Krishnasamy Pavithra
• Gopalan Vijayadurga
• Devakumar Dinesh
• Venkatachalam Ramasubramanian

Abstract The 45 days feeding trial was carried out to assess the effects on the Labeo rohita fish growth, biochemical analysis, hematological parameters, disease resistance to against the fish pathogen Pseudomonas aeruginosa. The Immune response of L. rohita when fed with using fruits methanol extraction of Cucumis melo (CM) and Pyrus communis (PC) compared to a control diets. The fishes were randomly stocked into five experimental groups, and diets containing different concentrations for control 0% (basal diets), 1% (CM and PC), 2% (CM and PC), were fed to triplicate groups of fish (average weight; 2.60 ± 0.02) for 45 days. At the end of the feeding trail, test fish were intraperitoneal injected with a pathogen, Pseudomonas aeruginosa. Resulted in significant (P < 0.05) higher weight gain and feed intake were noticed in groups of fish fed 2% CM-treated diets compared to PM treated diets. At the same time, none of the biochemical and hematological parameters was significantly affected. After 45 days bacterial challenge, labeo rohita fed 2% Cucumis melo had significantly higher survival rate compare to the PM and control groups. Moreover, Immune parameters such as, phagocytic activities were most significantly enhanced in 2% CM especially after a bacterial challenge. This study revealed that dietary Cucumis melo at 2% could promote the growth, Immune system, Cost effective, eco friendly alternative antibiotics and improved survival of labeo rohita compared to PC.

labeo rohita; Cucumis melo; Pyrus communis; Bacterial pathogen

"Effect of Muskmelon, Cucumis melo and Pears, Pyrus communis extract on growth, haematology, immune response and disease resistance in Labeo rohita against Pseudomonas aeruginosa", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 11, page no.976-989, November-2020, Available :http://www.jetir.org/papers/JETIR2011273.pdf

"Effect of Muskmelon, Cucumis melo and Pears, Pyrus communis extract on growth, haematology, immune response and disease resistance in Labeo rohita against Pseudomonas aeruginosa", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 11, page no. pp976-989, November-2020, Available at : http://www.jetir.org/papers/JETIR2011273.pdf