G. Zhelyazkov Department of Animal husbandry – Ruminants and animal product technologies, Faculty of Agriculture, Trakia University, Students campus, 6000 Stara Zagora, Bulgaria (Manuscript received 02 February 2025; accepted for publication 30 May 2025) Abstract. The aim of the

V. Krasteva*, A. Zaikov, M. Yankova Institute of Fisheries and Aquaculture, 4003 Plovdiv, Bulgaria (Manuscript received 20 June 2019; accepted for publication 1 December 2019) Abstract. The present study investigated the growth performance, weight gain, feed conversion ratio, growth a