M. Mustafa1*, I. Sirakov1, S. Stoyanova1 1Department of Livestock – non-ruminant animals and special industries, Section Fisheries and Aquaculture, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria (Manuscript received 13 May 2022; accepted for publication 8

Koshinski*   Department of Biology and Aquaculture, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria   DOI: 10.15547/ast.2018.03.051 (Manuscript received 30 June 2018; accepted for publication 20 August 2018)   Abstract. Medicinal herbs can be used as f

Georgieva, G. Zhelyazkov, Y. Staykov, D. Georgiev   Department of Biology and Aquaculture, Faculty of Agriculture, Trakia University, 6014 Stara Zagora, Bulgaria   DOI: 10.15547/ast.2018.03.041 (Manuscript received 7 June 2018; accepted for publication 28 August 2018)   Abst

G. Zheliazkov* Department of Biology and Aquaculture, Faculty of Agriculture, Trakia University, 6000 Stara Zagora, Bulgaria Abstract. The aim of this study was to determine the influence of linseed and sunflower oils in the diet on the survival rate, weight gain and the feed conversi

M. Stancheva, A. Merdzhanova Abstract. The aim of the present study was to determinate the fatty acid composition of two commercially important freshwater fish species – rainbow trout (Oncorhynchus mykiss) and carp (Cyprinus carpio L.) and one Black Sea fish – grey mullet (Mugil

I. Sirakov, Y. Staykov , G. Djanovski Abstract. The purpose of the study was to determine the dissolved oxygen consumption of rainbow trout, cultivated in raceway. The consumption analysis is based on a process automatic oxygen measurement system and compares the theoretically calcula