بررسی امکان جایگزینی نسبی تفالة میوة زیتون با برخی اقلام جیره در تغذیة ماهی قزل‌آلای رنگین‌کمان پرورشی (Oncorhynchus mykiss Walbaum, 1792)

نوع مقاله : مقاله پژوهشی


1. گروه شیلات، دانشکده منابع طبیعی، دانشگاه گیلان، صومعه سرا، صندوق پستی 1144، گیلان، ایران


این تحقیق به منظور بررسی تأثیر استفاده از ضایعات حاصل از روغن­کشی میوة زیتون بر ترکیبات شیمیایی بدن، شاخص­های رشد، فاکتورهای خونی و ارزیابی حسی ماهی قزل‌آلای رنگین‌کمان انجام  پذیرفت. 6 نوع جیره غذائی شامل یک جیره شاهد (بدون تفاله زیتون) و 5 جیره حاوی 2، 4، 6، 8 و 10 درصد تفالة خشک و الک شده تجاری میوة زیتون تهیه شده و ماهیان با وزن متوسط 7/184 گرم در استخرهای مستطیلی شکل تغذیه شدند. هر تیمار از سه تکرار برخوردار بود. دبی متوسط آب 10 لیتر بر ثانیه و میزان دما و pH آب به ترتیب در طی دوره پرورش 3±10 درجه سانتی گراد و 9/7- 8/6 بوده است. ماهیها بر اساس میزان اشتها  در سه نوبت در روز (ساعتهای 8، 12 و 18) بطور دستی تغذیه شدند. بررسی شاخص‌های مختلف اعم از آنالیز لاشه، شاخص­های رشد و فاکتورهای خونی نشان داد که می­توان تا 8 درصد جیره توسط تفاله زیتون جایگزین شود و  علی‌رغم اینکه در اکثر موارد تیمار 10 درصد نیز شرایط مشابه‌ای داشته اما با بررسی برخی از شاخص­های خونی به‌نظر می­رسد که استفاده از تفاله زیتون تا 8 درصد ترکیب جیره مناسب­ترین میزان بکارگیری آن می باشد.  


عنوان مقاله [English]

The Possibility of Partial Replacement of Olive Pomace with Some Dietary Items of Rainbow Trout (Oncorhynchus mykiss Walbaum, 1792)

نویسندگان [English]

  • Majidreza Khoshkholgh1*
  • Majid Mosapour Shajani1
  • Mohammad Mohammadi Baresari1
1. Fisheries Department, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, P.O. Box 1144, Guilan, Iran
چکیده [English]

This study investigated effects of different levels of dietary olive oil pomace on body composition, growth performance, hematological factors and sensory analysis of rainbow trout. Six practical diet containing 0 (control), 2, 4, 6, 8 and 10% olive pomace were formulated and supplied to fish with an average body weight of 184.7 g being allocated randomly to rectangular concrete ponds. Water flow was 10 L S-1. Temperature and pH were 10±3°C and 6.8-7.9, respectively. Fish were fed by hand ad libitum three times a day. At the end of the experiment, eviscerates and beheaded body composition and growth performance were not affected by difference levels of olive pomace (P > 0.05). However, hematological parameters were significantly affected by increasing olive oil pomace (P<0.05). The findings of this study suggested that a maximum of 8% level of olive oil pomace is the best optimum growth, body composition and hematological factors for rainbow trout.

کلیدواژه‌ها [English]

  • Rainbow trout
  • Olive Pomace
  • Body Composition
  • growth performance
  • Hematological Parameter
  • Sensory Analysis
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