TY - JOUR ID - 118592 TI - Effects of soy protein base diet supplemented with lysine and methionine on digestive enzymes activity and hematological parameters in silvery-black porgy (Sparidentex hasta) juveniles JO - Iranian Journal of Fisheries Sciences JA - IJFS LA - en SN - 1562-2916 AU - Yaghoubi, Morteza AU - Torfi mozanzadeh, Mansour AU - Ghafle Marammazi, Jasem AU - Safari, Omid AU - Gisbert, Enric AD - Iranian Fisheries Science Research Institute, Agricultural Research Education and Extension Organzation (AREEO), Ahwaz, IRAN. AD - Department of Fisheries, Ferdowsi University of Mashhad, Khorasan Razavi, Iran AD - IRTA, Centre de Sant Carles de la R&aacute;pita (IRTA-SCR), Unitat de Cultius Experimentals, Crta. del Poble Nou Km 5.5, Sant Carles de la R&aacute;pita, Spain Y1 - 2019 PY - 2019 VL - 18 IS - 4 SP - 968 EP - 980 KW - Soy protein KW - Lysine KW - Methionine KW - Digestive enzymes activity KW - Hematology KW - Sparidentex hasta DO - 10.22092/ijfs.2019.118592 N2 - The effect of dietary partial replacement of fish meal (FM) by soybean protein (SP) alone or in combination with lysine (Lys) and methionine (Met) supplementation were tested in a 60-days feeding trial for silvery-black porgy (Sparidentex hasta) juveniles. Seven isoproteic (ca. 50% crude protein) and isoenergetic (ca. 22.4 MJ/kg) diets were formulated in which 45% (SP45), 60% (SP60) and 75% (SP75) of FM protein were replaced by SP and the control diet (FM) was prepared with FM as the major source of protein. In SP45+, SP60+ and SP75+ diets, 45 to 75% of FM was replaced by SP with supplementing blends of Lys and Met (98% of purity). The activities of the trypsin, lipase and α-amylase were higher in fish fed SP diets with crystalline amino acids supplementation than in the other groups (P < 0.05). Fish fed SP75 and SP75+ diets had the lowest red blood cell count and hematocrit level (P < 0.05). The results of the current study indicated that anti-nutritional factors in a soy-protein based diet rather than lysine and methionine deficiencies may have adverse effects on digestive enzymes activities and health condition in silvery-black porgy juveniles. UR - https://jifro.areeo.ac.ir/article_118592.html L1 - https://jifro.areeo.ac.ir/article_118592_f4575275943d6fbc23116340c98cfb35.pdf ER -