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

نویسندگان

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

چکیده

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.  

کلیدواژه‌ها


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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