Chemosphere, cilt.272, ss.129895-129901, 2021 (SCI-Expanded)
In this study, boric acid was added to the rainbow trout (Oncorhynchus mykiss) feed at ratios of 0.00%,0.01%, 0.05%, 0.10%, and 0.20%. The feeding period of this study continued for 90 days. The effect of boricacid on the growth parameters and nutritional composition of rainbow trout were investigated. In thisresearch, effects on live weight gain (LWG), amount of feed intake, feed conversion rate (FCR), proteinefficiency rate (PER), specific growth rate (SGR), survival rate, economic conversion rate (ECR), andeconomic profit index (EPI) were evaluated as growth parameters. As for nutritional contents, the totalcrude protein, lipid, raw ash, and humidity ratios were calculated. Rainbow trout with an initial weight of92.04 g reached up to 195.05±1.69 g, 202.69±1.94 g, 217.53±2.84 g, 195.25±2.18 g, and181.20±1.89 g, respectively in the different levels of boric acid at the end of the trial period. The bestgrowth performance was obtained in the group with 0.05% boric acid added, while the lowest growthperformance was observed in the group with 0.20% boric acid added. It was concluded based on theresults of this study that the amount of boric acid up to 0.05% in thefish feed positively affected thegrowth parameters and the addition of higher amounts had either no benefit or negative effects on thegrowth performance of rainbow trout. Furthermore, boric acid in feed affected the nutritional compo-sition offish meat.