Effects of different levels of plantain (Plantago major L.) Extraction of diet on growth indices, of Common carp (Cyprinus carpio).

The aim of this study was to investigate the effect of different levels of plantain (Plantago major L) extraction on several growth indices and nutritional efficacy in Common carp (Cyprinus carpio). For this purpose, 204 common carps with an average weight (18.69 ± 2.09 g) in 4 treatments and each treatment with 3 replicas including: control (without Extract of Great Plantain Extract), 0.1, 0.5 and 1% of the extraction distributed in kilograms of food, feeding the fish twice a day, with 3% of body weight and the experimental period was 8 weeks. At the end of the experiment period, the results showed growth indices (weight gain, weight gain percentage, specific growth coefficient, daily weight and percentage of daily weight gain) and some nutrition indices (feed conversion coefficient and feed efficiency coefficient) with no significant difference with the control group (P> 0.05). The highest and lowest weight gain, weight gain percentage and condition factor were observed in the 0.1% extraction diet and control group, respectively. The highest and lowest specific growth coefficients were observed in 0.1% and 0.5% extraction diet and control groups, respectively. The lowest feed conversion coefficient was observed in 1% extraction diet and the lowest feed efficiency coefficient was observed in the control group. According to the results, different levels of extraction had no significant effect on growth performance and nutritional efficiency.