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بررسی تأثیر مقادیر مختلف کیتوزان بر شاخص های رشد و تغذیه در ماهی قزلآلای رنگینکمان (Oncorhynchus mykiss) | ||
| فصلنامه علمی زیست شناسی جانوری تجربی | ||
| مقاله 5، دوره 4، شماره 1، شهریور 1394، صفحه 35-44 اصل مقاله (550.44 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| نویسندگان | ||
| علی اکبر طافی* 1؛ سعید مشکینی2 | ||
| 1دانشجوی دکترای تخصصی تکثیر و پرورش آبزیان، دانشکده منابع طبیعی دانشگاه ارومیه | ||
| 2استادیار دانشکده دامپزشکی و پژوهشکده آرتمیا و جانوران آبزی دانشگاه ارومیه | ||
| چکیده | ||
| چکیده تعداد 900 قطعه ماهی با میانگین وزنی 25 گرم از یکی از مزارع پرورش ماهی شهرستان ارومیه تهیه و پس از گذراندن دو هفته دوره سازش با شرایط محیط آزمایش به طور تصادفی در چهار تیمار تقسیم شده و با سطوح 0 (گروه شاهد)، 5/2، 5 و 10 گرم کیتوزان در هر کیلوگرم غذا و به مدت هشت هفته مورد تغذیه قرار گرفتند و سپس ماهیان تمام تیمارها به مدت سه هفته با جیره فاقد کیتوزان تغذیه شدند. در طول دوره تحقیق هر دو هفته یکبار و نیز در پایان هفته یازدهم (پایان آزمایش) زیست سنجی ماهیان انجام گرفته و شاخصهای رشد و تغذیه نظیر میانگین وزن، طول کل، ضریب تبدیل غذایی، ضریب رشد ویژه، ضریب چاقی و رشد روزانه محاسبه گردید و دادهها با نرم افزار آماری (ver. 20) SPSS (p | ||
| کلیدواژهها | ||
| قزلآلای رنگینکمان؛ محرکهای رشد؛ کیتوزان؛ شاخصهای رشد؛ شاخصهای تغذیهای | ||
| عنوان مقاله [English] | ||
| Investigating effects of different values of Chitosan polysaccharide on growth parameters in rainbow trout (Oncorhynchus mykiss) | ||
| نویسندگان [English] | ||
| Ali Akbar Tafi1؛ Saeed Meshkini2 | ||
| 1Ph.D. Candidate of Aquaculture, Faculty of Natural Resources, Urmia University, Iran | ||
| 2Assistance of Professor, Faculty of Veterinary Medicine and Artemia and Aquatic Animals Research Institute, Urmia University, Iran | ||
| چکیده [English] | ||
| Abstract In this study 900 rainbow trout (mean weight 25 gr) were obtained from a local fish farm in Urmia city and after acclimatization for 10 days, the fish were randomly divided into four groups (with three replication) and fed for 8 weeks with 0 (control), 2.5, 5 and 10 g chitosan/kg feed, respectively. Finally treatments were fed the control diet (without any chitosan) for another 3 weeks. Body weight, total length, food conversion rate, Special Growth Rate, Condition Factor and Daily weight gain were determined every two weeks and at the end of the trial. Data were analyzed using SPSS ver. 20. Results depicted no positive effects of chitosan on growth and nutritional parameters of rainbow trout. However, treatment four considerably (10 g chitosan/kg feed) inhibited live weight gain, total length increment and deteriorated food conversion rate (FCR) and specific growth rate (SGR) in comparison to control group and third treatment (5 g chitosan/kg feed). | ||
| کلیدواژهها [English] | ||
| Rainbow trout, Growth Stimulants, Chitosan, growth parameters, Nutritional Indices | ||
| مراجع | ||
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