ORIGINAL_ARTICLE The aim of the current study was to test the effect of a diet supplemented with dandelion’s (Taraxacum officinale) extract on the productive traits and blood parameters in common carp (Cyprinus carpio L.) cultivated in an recirculation aquaculture system. The carps were cultivated at a stocking density of 7.2 kg/m3 in recirculation aquaculture system. The fish were split into the following two experimental groups: DF (the fish were fed with feed supplemented with dandelion’s extract) and CF (the fish were fed with feed without supplementation). Common carp fed with a diet added with dandelion’s extract at a quantity of 0.8% from daily feed ratio, did not affect the hydrochemical parameters (pH, dissolved oxygen, and electrical conductivity). The carps fed with feed supplemented with dandelion’s extract did not show better productive traits compared with these found for carp from the control variant. The carp from experimental groups had a higher survival rate, final weight, average individual weight gain and specific growth rate (SGR), respectively with 13.2%, 3.94%, 31.5% and 31.3%, compared with the average values of these parameters measured in individuals fed with the control feed, but the differences were not statistically significant (P >= 0.05). Supplementation of feed with dandelion’s extract significantly decreased the plasma cholesterol (4.76%) and triglyceride (61.2%) content, promoting hypolipidemic status in fish (P <= 0.05). https://macvetrev.mk/Files/Article/2019/10.2478/macvetrev-2019-0017/macvetrev-2019-0017.pdf 2020-10-15T09:00:00 131 139 10.2478/macvetrev-2019-0017 Dandelion’s extract common carp growth blood parameters RAS Ivaylo Sirakov ivailo_sir@abv.bg false 1 Department of Biology and Aquaculture, Faculty of Agriculture, Trakia University, Students campus, 6014 Stara Zagora, Bulgaria LEAD_AUTHOR Katya Velichkova false 2 Department of Biology and Aquaculture, Faculty of Agriculture, Trakia University, Students campus, 6014 Stara Zagora, Bulgaria AUTHOR Stefka Stoyanova false 3 Department of Biology and Aquaculture, Faculty of Agriculture, Trakia University, Students campus, 6014 Stara Zagora, Bulgaria AUTHOR Georgi Zhelyazkov false 4 Department of Biology and Aquaculture, Faculty of Agriculture, Trakia University, Students campus, 6014 Stara Zagora, Bulgaria AUTHOR Yordan Staykov false 5 Department of Biology and Aquaculture, Faculty of Agriculture, Trakia University, Students campus, 6014 Stara Zagora, Bulgaria AUTHOR Martins, C.I.M., Eding, E.H., Verdegem, M.C., Heinsbroek, L.T., Schneider, O., Blancheton, J. 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