عنوان :
اثر جايگزيني روغن ماهي با روغن هاي كانولاوبزرك بر رشد و تركيب اسيدهاي چرب ماهي قزل آلاي رنگين كمان ﴿Oncorhynchus mykiss﴾
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده منابع طبيعي
صفحه شمار :
ده،72ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
عيسي ابراهيمي، نصرا... محبوبي صوفياني
توصيفگر ها :
اهميت چربي ها
تاريخ نمايه سازي :
3/2/90
استاد داور :
امير حسين گلي، اميدوار فرهاديان
دانشكده :
مهندسي منابع طبيعي
چكيده فارسي :
به فارسي و انگليسي: قابل رويت د نسخه ديجيتالي
چكيده انگليسي :
73 Effect of Replacement of Fish Oil with Canola and Flaxseed Oils on Growth and Fatty Acids Composition of Rainbow Trout Oncorhynchus mykiss Ali Masiha masiha ali@gmail com Date of Submission 2011 02 09 Department of Natural Resources Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Dr Eisa Ebrahimi e ebrahimi@cc iut ac ir Supervisor Dr Nasrollah Mahboobi Soofiani soofiani@cc iut ac ir Abstract In the present study potential of two oil resources canola oil and flaxseed oil were examined as replacements for dietary fish oil in diets of fingerling rainbow trout Oncorhynchus mykiss during 8 weeks period Two hundred and ten individual fish with mean initial body weight of 16 49 0 46 g in 7 triplicate groups 21 replicates 10 fish per replicate reared in semi recirculated system with mean water temperature of 13 61 1 27 oC Seven iso nitrogenous protein 30 66 0 47 and iso lipidic lipid 16 09 0 29 experimental diets were formulated from 100 fish oil 100 canola oil 100 flaxseed oil 1 1 blends of fish and canola oils 1 1 blends of fish and flaxseed oils 1 1 blends of canola and flaxseed oils and 1 1 1 blends of fish canola and flaxseed oils At the end of the experiment 2 fish from each replicate were sacrificed for body composition and fatty acid profile analyses Except for protein and lipid percentage moisture and ash content of the body were not significantly influenced by the type of the diets The highest content of protein and lipid in flesh were observed in treatment 4 which showed significant differences with treatments 5 and 7 and treatments 2 5 6 7 respectively p 0 05 However there were no significant differences in final body weight specific growth rate weight gain Percentage food conversion ratio survival and hepato somatic index among the dietary treatments The highest amount of condition factor were observed in diets with 100 fish oil that being significantly different from treatments 3 5 6 7 p 0 05 The highest amount of relative carcass weight were observed in diets with 100 canola oil that being significantly different from treatment 7 p 0 05 Moreover the highest PPV and PER value were observed in treatment 3 that showed significant differences with treatments 1 2 4 5 and 7 p 0 05 The results of fatty acid profile revealed that flesh fatty acid composition is affected by dietary fatty acid composition In addition the highest amounts of HUFAs was detected in fish fed 100 fish oil that were significantly different from other treatments p 0 05 However complete replacement of fish oil with flaxseed oil or 50 fish oil with canola oil can provide enough HUFAs that required for daily human consumption In all treatments the PUFA SFA and n6 n3 ratios was higher than 0 45 and lower than 4 respectively In general results of present study indicate that rainbow trout can be reared on a diet that fish oil has been replaced with canola and flaxseed oils without having adverse effects on different aspects of fish performance Key words Rainbow trout Oncorhynchus mykiss Fish oil Canola oil Flaxseed oil Growth Fatty acid composition
استاد راهنما :
عيسي ابراهيمي، نصرا... محبوبي صوفياني
استاد داور :
امير حسين گلي، اميدوار فرهاديان
