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    Effects of dietary tribulus terrestris extract supplementation on growth, feed utilization, hematological, immunological, and biochemical variables of nile tilapia Oreochromis niloticus
    (Israeli Journal of Aquaculture - Bamidgeh, 2014) Gültepe, Nejdet; Acar, Ümit; Sabri Kesbiç, Osman; Yilmaz, Sevdan; Yildirim, Önder; Türker, Ali
    The present study was conducted for 88 days to evaluate the effect of dietary Tribulus terrestris supplementation on growth performance, feed utilization, and hematological, immunological, and biochemical indices of Nile tilapia, Oreochromis niloticus. A total of 144 Nile tilapia, average body weight 2.61±0.35 g, were divided into four experimental treatments. There were three replicates of each treatment. Four isonitrogenous (40% CP) and isolipidic (10% CL) experimental diets contained T. terrestris extract at levels of 0, 200, 400 and 600 mg/kg respectively. Growth performance and feed utilization of Nile tilapia were significantly higher (p<0.05) in all treatment groups fed with T.terrestris extract supplemented diets than those fed the control diet. There were no significant differences between body composition of fish (p>0.05). Hematocrit, hemoglobin, mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), and myeloperoxidase variables were not significantly affected by herb extract (p>0.05). However, mean corpuscular volume (MCV) value and lysozyme activity increased with increasing T. terrestris extract (p<0.05). Serum albumin, total protein, and triglyceride levels were not affected by T. terrestris extract. Serum globulin and glucose levels increased and cholesterol levels decreased in Nile tilapia fed with herbal supplemented diets. The results of the present study suggest that Nile tilapia fed diets containing at least 400 mg/kg T. terrestris extract enhanced growth performance, feed utilization, hematological, immunological, and biochemical indices.
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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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    Öğe
    The effects of using peanut meal in rainbow trout (Oncorhynchus mykiss) diets on the growth performance and some blood parameters
    (Central Fisheries Research Institute, 2018) Acar, Ümit; Türker, Ali
    In this trial, rainbow trouts (71.69±1.21 g) were fed with feeds containing peanut meal at different levels for 60 days and their growth performance, body compositions and some blood parameters were examined. Accordingly, 4 different trial feeds as the control feed (PNM0) that contains FM as the main source of protein, and feeds containing 10% (PNM10), 20% (PNM20) and 30% (PNM30) peanut meal as an alternative to fishmeal were prepared. At the end of the feeding period, fish that were fed with PNM10 gained as much weight as those fed with the control feed. Feed conversion ratio (FCR) and specific growth rate (SGR) findings of rainbow trouts fed with trial feeds differed significantly from the control group as the peanut meal level used in feeds exceeded 10% (P<0.05). No significant differences were detected in terms of fillet proximate compositions (P>0.05). In the examination of the hematological parameters obtained from rainbow trouts fed with feeds containing different peanut meal levels, it was detected that there were no significant differences compared to the control group (P<0.05), whereas the serum biochemical parameters generally worsened as the level of peanut meal in the ration exceeded 10% (P<0.05). The present study demonstrated that utilization of new protein source peanut oil cake meal can be effectiveliy used to replace up to 10% of FM in diets of rainbow trout without any adverse effects of growth performance, feed utilization, hematological and serum biochemical parameters. © 2018, Central Fisheries Research Institute. All rights reserved.
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    Öğe
    Yavru kalkan balığının (Psetta maeotica) beslenmesinde taze hamsinin değerlendirilmesi
    (2006) Ergün, Sebahattin; Yiğit, Murat; Türker, Ali; Önal, Umur
    Bu araştırmada, pelet yem (%50 ham protein ve % 18 ham yağ), taze hamsi (Engraulis encrasicholus; %20,8 ham protein ve %9,2 ham yağ) veya her iki yemle beraber beslemenin, kalkan balığı (Psetta maeotica) yavrularının büyüme ve yem değerlendirme üzerine etkisi incelenmiştir. Üç farklı diyetin iki tekerrürlü olarak incelendiği bu çalışmada, ortalama ağırlığı 41 g olan toplam 90 adet kalkan balığı yavrusu (15 adet/tank) kullanılmıştır. 45 gün süren deneme sonunda, gruplardaki ortalama balık ağırlıkları sadece peletle beslenen grupta (PL) 62,30+2,22 g, hamsi ve peletle yemlenen grupta (HP) 63,54±1,89 g ve sadece hamsi ile beslenen grupta (HS) 62,90±0,89 g olarak tespit edilmiştir. Gruplar arasındaki fark istatistiki olarak önemsiz bulunmuştur (P>0,05). Günlük yem tüketimi (%, g kuru yem/ g balık ağırlığı) ve yem değerlendirme değerleri (g tüketilen kuru yem/g ağırlık artışı) PL grubunda 0,77±0,01 ve 0,86±0,07, HP grubunda 0,78±0,01 ve 0,82±0,09 ve HS grubunda 0,75±0,02 ve 0,79±0,06 olarak tespit edilmiş ve gruplar arasında fark bulunmamıştır (P>0,05). Araştırma sonuçlarına göre, kalkan balığı yetiştiriciliğinde farklı besleme uygulamalarının büyüme ve yem değerlendirme üzerinde benzer etki gösterdiği görülmüş ve balıkların beslenmesinde sadece pelet yem, sadece hamsi veya pelet yemle birlikte taze hamsi verilebileceği sonucuna varılmıştır.