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    EVALUATION OF SOYBEAN MEAL AS A PROTEIN SOURCE AND ITS EFFECT ON GROWTH AND NITROGEN UTILIZATION OF BLACK SEA TURBOT (PSETTA MAEOTICA) JUVENILES
    (Natl Taiwan Ocean Univ, 2010) Yigit, Murat; Ergun, Sebahattin; Turker, Ali; Harmantepe, Burcu; Erteken, Adnan
    Three experimental diets were formulated to be iso-nitrogenous (550 g kg(-1) protein) and iso-caloric (20.5 kJ gross energy g(-1) diet) by substituting fish meal (FM) for defatted soybean meal (SBM) at levels of 0, 10 and 20% replacement in order to evaluate the effects of replacing FM with deflated SBM in diets for Black Sea turbot. Diets were fed to triplicate groups of young Black Sea turbot (mean initial weight of 30.2 +/- 0.2 g) for 60 days. Turbot fed all three diets had no significant difference (P > 0.05) in final weight, specific growth rate, nutrient utilization, Nitrogen loss or retention. Survival rate was 100% in all treatments. The results of this study indicate that fish meal can be replaced with soybean meal up to 20% level in diets for young Black Sea turbot without adverse effects on growth, nutrient utilization or nitrogen balance. This may increase profitability by allowing the production of less expensive feeds, hence supporting, the sustainable growth of turbot culture industry with environment-friendly diets.
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    Evaluation of soybean mealas a protein source and its effect on growth and nitrogen utilization of Black Sea turbot (psetta maeotica) juveniles
    (2010) Yigit, Murat; Ergün, Sebahattin; Türker, Ali; Harmantepe, Burcu; Erteken, Adnan
    Three experimental diets were formulated to be isonitrogenous (550 g kg-1 protein) and iso-caloric (20.5 kJ gross energy g-1 diet) by substituting fish meal (FM) for defatted soybean meal (SBM) at levels of 0, 10 and 20% replacement in order to evaluate the effects of replacing FM with defatted SBM in diets for Black Sea turbot. Diets were fed to triplicate groups of young Black Sea turbot (mean initial weight of 30.2 ± 0.2 g) for 60 days. Turbot fed all three diets had no significant difference (P > 0.05) in final weight, specific growth rate, nutrient utilization, Nitrogen loss or retention. Survival rate was 100% in all treatments. The results of this study indicate that fish meal can be replaced with soybean meal up to 20% level in diets for young Black Sea turbot without adverse effects on growth, nutrient utilization or nitrogen balance. This may increase profitability by allowing the production of less expensive feeds, hence supporting the sustainable growth of turbot culture industry with environment-friendly diets.
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    Health Risk Assessment of Metals via Consumption of Rapa Whelk (Rapana venosa) from the Black Sea
    (Ankara Univ, Fac Agriculture, 2024) Bayrakli, Baris; Yigit, Murat; Altuntas, Mutlu; Maita, Masashi
    The present study investigated the bioaccumulation of metals in raw, heat treated-and sterilized Rapa whelk, and evaluated the consumer risks for human consumption. All of the metals, with the exception of Mn, were found to be lower than the permissible FAO standards. A remarkable amount of metal was released into the boiling water (Al, Cr, Cu, Fe, Hg, Pb, Sb, Se, Zn) after heat treatment and hypochlorite solution (Al, As, Cu, Hg, Mn, Pb, Se, Zn). After sterilization, the levels for As, Mo, Cd, Sb, Cr, Zn, Se, Cu, and Hg in Rapa whelk were reduced by 47.4%, 40.1%, 24.9%, 20.3%, 17.5%, 4.5%, 3.6%, 0.93%, and 0.68%, respectively. The metals in Rapa whelk exposed to hypochlorite immersion were found to be below permissible upper limits. The target hazard quotients for the non- carcinogenic risks of consuming sterilized Rapa whelk were below 1 (THQ<1), showing no potential health risks for adult men, women and children when consuming sterilized Rapa whelk. Indeed, Rapa whelk could be a good source of Cr, Cu, Fe, Mn, Mo, Se, and Zn to meet the daily recommended quantities in food, when consumed regularly. However, the cancer risks of As, Cd, Ni, and Pb proved to be over acceptable levels; hence, the safe consumption limits determined in this study are advisable when consuming Rapa whelk.
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    Partial Replacement of Fishmeal by Defatted Soybean Meal in Diets for Black Sea Turbot (Psetta maeotica): Growth and Nutrient Utilization in Winter
    (Israeli Journal Of Aquaculture-Bamidgeh, 2008) Ergun, Sebahattin; Yigit, Murat; Turker, Ali; Harmantepe, Burcu
    The objective of the present study was to evaluate replacement of white fishmeal by soybean meal in practical diets for Black Sea turbot (Psetta maeotica) at levels of 0, 10%, and 20%. The diets were fed to triplicate groups of juvenile Black Sea turbot (initial body weight 18 g) for 60 days. At the end of the trial, there were no differences in growth performance, feed utilization, and nitrogen retention between the control group fed 100% fishmeal and the experimental groups fed 10% or 20% soybean meal. In conclusion, 20% inclusion of soybean meal can allow reduction of white fishmeal by up to 14%, leading to savings on fishmeal protein.