@article { author = {Yaghoubi, Morteza and Torfi mozanzadeh, Mansour and Ghafle Marammazi, Jasem and Safari, Omid and Gisbert, Enric}, title = {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}, journal = {Iranian Journal of Fisheries Sciences}, volume = {18}, number = {4}, pages = {968-980}, year = {2019}, publisher = {Agricultural Research,Education and Extension Organization}, issn = {1562-2916}, eissn = {2322-5696}, doi = {10.22092/ijfs.2019.118592}, abstract = {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.}, keywords = {Soy protein,Lysine,Methionine,Digestive enzymes activity,Hematology,Sparidentex hasta}, url = {https://jifro.areeo.ac.ir/article_118592.html}, eprint = {https://jifro.areeo.ac.ir/article_118592_f4575275943d6fbc23116340c98cfb35.pdf} }