en aquaculture aquaculture پژوهشي Orginal research papers <a><span style="color:#000000;">Apparent digestibility coefficients (ADCs) </span></a><span style="color:#000000;">&nbsp;of ten feedstuffs were investigated in yearling Siberian sturgeon, <em>Acipenser baerii</em>, (290&plusmn;22 g), </span><a><span style="color:#000000;">using 1% chromic oxide as the inert marker.</span></a><span style="color:#000000;"> The ingredients included: fish (<em>Clopeonella</em> sp) meal (FM), meat and bone meal (MBM), poultry by-product meal (PBM), spray-dried blood meal (BM), feather meal (FeM), solvent extract soybean meal (SBM), canola meal (CM), corn gluten meal (CGM), wheat gluten meal (WGM) and bakers&rsquo; yeast (BY). ADC values of crude protein varied from 60% to 92.9% (FeM and FM, respectively). ADC_CP of FM, MBM, PBM (animal origin), WGM, and CGM (plant origin) were significantly higher than the other treatments (<em>p</em><0.05). ADCs of amino acid in feedstuffs followed a similar trend to the ADC_CP, but it is not thoroughly correspondence with protein digestibility. The lowest dry matter (65.5%), and lipid (64.8%) digestibility were recorded in BM and FeM, respectively. The WGM (81.5%) exhibited the highest digestibility of gross energy (ADC_GE); the lowest was in CM (68.1%). According to the results of this research, FM, MBM, PBM (animal origin) and also WGM and CGM (plant origin) were the </span><a><span style="color:#000000;">more digestible </span></a><span style="color:#000000;">feed ingredients for yearling Siberian sturgeon.</span> <div> <div> <div id="_com_3" uage="JavaScript"></div> </div> </div> Aquaculture, Digestibility, Fish feeding, Ingredients, Siberian sturgeon. 1500 1516 http://jifro.ir/browse.php?a_code=A-10-3431-1&slc_lang=en&sid=1 M.K. Mirzakhani mk_mirzakhani@yahoo.com 100319475328460034124 100319475328460034124 No Aquaculture Department, Natural Resources and Marine Science Faculty, Tarbiat Modares University, Noor, Mazandaran, Iran A. Abedian Kenari aabedian@modares.ac.ir 100319475328460034125 100319475328460034125 Yes Aquaculture Department, Natural Resources and Marine Science Faculty, Tarbiat Modares University, Noor, Mazandaran, Iran A. Motamedzadegan amotgan@yahoo.com 100319475328460034126 100319475328460034126 No Department of Food Science, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran A. Banavreh a_banavreh@yahoo.com 100319475328460034127 100319475328460034127 No Department of Fisheries, Faculty of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University, Tehran, Iran