THE INFLUENCE OF THE DISEASE STATE ON THE MAINTENANCE STATUS FOR RAINBOW TROUT

Elena Mocanu, Liliana Athanasopoulos, N. Patriche, Magdalena Tenciu, Viorica Savin, M.D. Popa

Abstract
    The salmonids represent a valuable food source for humans, thanks to a high nutritional value and digestibility. In recent times, the authorities are preoccupied with insuring the health and well-being of the consumers, by obtaining high quality, healthy and safe aquaculture products. The aim of this paper is health status monitoring for rainbow trout (Oncorhynchus mykiss), during the disease caused by Yersinia rukeri, quantified through the biochemical composition of the meat. Yersiniosis is a illness that leads to significant economical losses in aquaculture industry. The biological material – rainbow trout Oncorhynchus mykiss – was monitored monthly for 7 months. The biochemical analysis of trout meat was realized at the moment of identification of pathogenic bacterium Yersinia rukeri through microbiological methods, after 15 days following a 10 day treatment with antibiotics. The experiment demonstrated that the disease state compromises growth performance and nutritional value of the infected biological material. However, the results indicated that after a 15 day period following the treatment, the maintenance status of rainbow trout will get better, without recovering the weight loss determined by the disease.