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Öğe Effect of Dietary Safflower and Canola Oil on Growth Performance, Body, and Fatty Acid Composition of Rainbow Trout (Oncorhynchus mykiss)(Taylor & Francis Inc, 2015) Dernekbasi, Seval; Kerim, Murat; Alagil, FikretThe objective of the present study was to evaluate the effects of the diets enriched with safflower and canola oil on growth, feed utilization, body composition, liver, and muscle fatty acid composition of rainbow trout (Oncorhynchus mykiss). Rainbow trout having approximate initial weight of 97.03 +/- 0.10 g were fed the experimental diets containing only fish oil (Group 0SFO), safflower oil (50% safflower oil, Group 50SFO and 33% safflower oil, Group 33SFO), and vegetable oil blend (33% safflower and 33% canola oil, Group 66SFCO) for 45 days. Twenty-five fish were randomly assigned for triplicate treatments and offered the test diets two times daily to apparent satiation. At the end of the experiment, survival was 100% in all treatments. No significant differences in the weight gain, specific growth rate, feed conversion ratio, and protein efficiency ratio were found between fish fed with the different experimental diets. The highest hepatosomatic index (HIS) and viscerasomatic index (VSI) was obtained in 50SFO and 33SFO groups, respectively. The moisture, protein, lipid, and ash content in the body composition of the fish increased in all experimental groups. The lipid content was not significantly different among the groups (p > 0.05); however, there was a significant difference in ash content between the control and the other groups (p < 0.05). The experimental diets containing vegetable oil (50SFO and 33SFO groups) and vegetable oil blend (66SFCO group) had significantly higher concentrations of n-6 fatty acids, predominantly in the form of linoleic acid (LA). The n-3 fatty acids were present in significantly higher concentration in the control treatment (0SFO). The fatty acid composition of fish fillet and liver were reflective of the dietary lipid source. While the fillet and liver of fish fed the 50SFO diet was high in linoleic acid (18:2 n-6), fish fed the 66SFCO diet had high concentrations of oleic acid (OA; 18:1 n-9). The present study suggests that fish oil can be replaced by up to 50% with safflower oil and by up to 66% with safflower + canola oil blend in rainbow trout diets with no significant effect on growth.Öğe Effects of dietary l-carnitine and chromium picolinate supplementations on performance and some serum parameters in rainbow trout (Oncorhynchus mykiss)(Springer, 2010) Selcuk, Zehra; Tiril, Serap Ustaoglu; Alagil, Fikret; Belen, Volkan; Salman, Mustafa; Cenesiz, Sena; Muglali, Omer HakanAn experiment was conducted to determine the effects of supplemental dietary l-carnitine, chromium picolinate (Cr-Pic) and their combination on growth performance and serum total protein, cholesterol, triglyceride and glucose of rainbow trout (Oncorhynchus mykiss). A total of 276 rainbow trout were randomly allocated to four groups. Fish (average initial body weight = 151 +/- A 1.69 g) were fed a basal diet without supplemental l-carnitine and chromium picolinate in the control group. The basal diet was supplemented with either 500 mg/kg l-carnitine, 1.6 mg/kg chromium picolinate or 500 mg/kg l-carnitine plus 1.6 mg/kg chromium picolinate for experimental groups 1 (C), 2 (Cr-Pic) and 3 (C + Cr-Pic), respectively. Fish were fed twice a day to apparent satiation for 58 days. Weight gain, growth rate, feed consumption and feed conversion ratio (feed/gain) were calculated for the whole period. At the end of the study, six fish were chosen randomly from each tank to represent the experiment and frozen at -20A degrees C for subsequent dorsal muscle analysis. The results showed no significant differences in final body weight, weight gain or feed conversion ratio among groups. There were also no significant differences in serum total protein, cholesterol, triglyceride or glucose concentrations among groups. Significantly higher lipid concentration of dorsal muscle was observed in experimental groups 1 and 3. In conclusion, supplemental dietary l-carnitine, chromium picolinate and their combination have no beneficial effects on improving growth performance and feed conversion ratio in rainbow trout. However, dietary l-carnitine slightly increased lipid concentration in dorsal muscle of rainbow trout.Öğe Effects of Extruded Red Lentil Meal on Growth Performance, Nutrient Digestibility, and Dorsal Muscle Composition in Rainbow Trout (Oncorhynchus mykiss)(Israeli Journal Of Aquaculture-Bamidgeh, 2010) Selcuk, Zehra; Tiril, Serap Ustaoglu; Alagil, Fikret; Salman, Mustafa; Muglali, Omer HakanThe aim of this study was to evaluate the inclusion of extruded red lentil meal as a plant protein source in a rainbow trout diet. Rainbow trout (n = 207) were randomly allocated to the control and two treatment groups. Diets were isonitrogenous and isocaloric. The control diet contained no extruded red lentil meal. Fish in treatments 1 and 2 were fed diets containing 10% and 15% extruded red lentil meal, respectively. Fish were fed twice a day to apparent satiation for 84 days. There were no significant (p>0.05) differences in weight gain, feed conversion ratio, protein efficiency ratio, dorsal muscle composition, or survival. Digestibility of nitrogen free extract+crude fiber was higher in the experimental groups than in the control. Thus, extruded red lentil meal can be considered as a protein source for rainbow trout diets up to the level of 15%.Öğe Effects of feeding frequency on nutrient digestibility and growth performance of rainbow trout (Oncorhynchus mykiss) fed a high lipid diet(Turkish Journal of Veterinary and Animal Sciences, 2009) Tırıl, Serap Ustaoğlu; Alagil, FikretThe effect of feeding frequency on nutrient digestibili ty and growth performance was investigated in rainbow trout ( Oncorhynchus mykiss ) fed a high lipid diet. The experimental diet contained 25.2% crude lipid and 40.7% crude protein. Two feeding frequencies were tested: 2 meals per day (Group I) and 6 meals per day (Group II). Fish were fed a restricted daily ration (1.5% of body weight) divided into equal meals. At the end of the experiment, the weight gain in Group I and II was 84.6% and 90.1%, respectively. There was no statistically significant difference between groups. The crude lipid and protein digestibility values were above 95% in both groups. The feed conversion ratios of Group I and II were 1.28 and 1.21, respectively. There was no significant difference between the 2 groups. Because nutrient digestibility , growth, and feed efficiency were not significantly enhanced when feeding was increased from twice to 6 times daily, f eeding twice per day was considered to be sufficient for rainbow trout fed the high lipid diet in this experiment.Öğe Evaluation of extruded chickpea, common bean and red lentil meals as protein source in diets for juvenile rainbow trout (Oncorhynchus mykiss)(Journal of Animal and Veterinary Advances, 2009) Tırıl, Serap Ustaoğlu; Karayücel, İsmihan; Alagil, Fikret; Dernekbaşı, Seval Yaman; Yağcı, Feraye BerkayAn experiment was conducted to evaluate, the use of extruded chickpea, common bean and red lentil meals as dietary protein source for juvenile rainbow trout. Three experimental diets were formulated based on a reference diet, which composed of 70% reference diet and 30% test ingredient. The diets were given as triplicate groups of juvenile rainbow trout (initial weight of 50 g) to apparent satiation twice daily. There were no significant differences among the groups fed chickpea, common bean and reference diet, for weight gain, specific growth rate and feed conversion ratio, but there were significant differences among these groups and red lentil group in these respects. There were no significant differences in digestibility of protein between the fish fed chickpea and reference diets and chickpea and common bean diets, but the red lentil diet gave lower protein digestibility. Apparent protein digestibility coefficients of the ingredients were determined high for extruded chickpea (80.65%), mid-range for extruded common bean (72.91%) and low for extruded red lentil meals (50.07%). The results indicated that extruded chickpea and common bean meals have higher potential than red lentil meal for use as dietary protein source in diets for juvenile rainbow trout.
