This study investigates the effects of dietary lipid sources on the growth and reproductive performance of Nile tilapia over three consecutive spawnings. Fish were reared using three experimental diets, with the goal of replacing dietary fish oil with palm oil. Three experimental diets and a commercial   trout diet was used as the control. The effect of dietary lipid on the growth performance, ...

this experiment was carried out to investigate the effects of supplementing two macroalgae Sargassum cristaefolium and Gracilaria pygmaea extracts in feed on some growth indices, hematology and blood constituents of juvenile rainbow trout (Onchorhynchus mykiss). Rainbow trout were randomly divided into four groups: a control group was fed with basal diet, and three treated groups fed with basal...

بر اساس این اهداف تعداد 5 ترانسکت انتخاب شد که 4 تا از آنها منتهی به دشت تبریز بوده و یک ترانسکت در داخل آن می باشد. در همه ترانسکت ها مجموعاً تعداد 32 پروفیل انتخاب و پس از حفر و تشریح، نمونه برداری از کلیه افقهای پروفیل ها انجام و جهت مطالعات مورفولوژیکی, فیزیکوشیمیایی و کانی شناسی رس آماده شدند. نتایج نشان داد که مواد تشکیل دهنده خاکهای دشت تبریز, از مواد حاصل از فرسایش ارتفاعات اطراف دشت,...

This study was conducted using butyric acid as a growth enhancer in the diets of Clarias gariepinus and Oreochromis niloticus. C. gariepinus (42.39 g±1.17) were fed diets containing varying inclusion levels of butyric acid (BA); 0 (CG1), 0.5 (CG2), 1.0 (CG3), 1.5 (CG4), 2.0 (CG5) g kg -1, where, CG1 is the control or reference diet. O. niloticus (25.50 g±0.50) were also fed diets containing var...