ISSN: 2577-4050
Authors: Fonkwa G* , Longue Ekon JP , Makombu JG , Bogny Tsamo MC , Kpoumie Nsangou A , Kametieu Djamou FJ , Tomedi Eyango M and Tchoumboue
To prevent and control fish diseases, medicinal plants are used as an alternative to synthetic chemicals which are ecological unfriendly. This study aims to evaluate the effects of methanolic extract (ME) and aqueous fraction (AF) of Carica papaya leaves on the epidemiological and zootechnical characteristics of Clarias gariepinus farming. A total of 240 Clarias gariepinus fingerlings of 8.60±0.20g average weights and showing no clinical signs of pathology were distributed into duplicates in four treatments namely T0 (control), T1(250 mg/l Oxytetracycline + 500 mg/l Potassium permanganate), T2 (3ml/l of water ME) and T3 (3ml/l of water AF) of 60 fish per treatment. The evaluation of the epidemiological and zootechnical characteristics after 90 days farming showed that out of the six clinical signs observed, 73.33% were anatomical (body trauma, dropsy, disnopea), while 21.34% and 5.23% were physiological (body discoloration) and ethological (anorexia, vertical swimming) respectively. Overall, the highest prevalence (p = 0.001) of pathology was observed at the control group (5.74%), followed by AF (1.97%), the synthetic drugs (1.11.70%) and ME (0.80%). The condition factor varied insignificantly between the treatments with the highest values (K>1) observed at the control treatment and AF. The mortality rate ranged from 5 (T1) to 10.22% (T0) and was not significantly different among treatments. The ME recorded the highest (p > 0.05) average daily weight gain (2.06±1.43 g/day) and productivity (3.180±1.589 kg/m3/day) but a moderate (p = 0.02) medicinal production cost (0.841±0.332$/kg of fish).
Keywords: Fish Diseases; Carica papaya; Clarias gariepinus; Epidemiozootechnics
Chat with us on WhatsApp
