تاثیر منابع چربی جیره های غذایی (روغن های کانولا و ذرت) بر فاکتورهای رشد، بازماندگی و ترکیب اسیدهای چرب کرم نرئیس (Nereis diversicolor)

نوع مقاله : تغذیه

نویسندگان

موسسه تحقیقات بین المللی تاسماهیان دریای خزر، سازمان تحقیقات، آموزش و ترویج کشاورزی، رشت، ایران

چکیده

بررسی تاثیر 4 جیره غذایی فرموله شده شامل جیره ­های حاوی روغن گیاهی کانولا، جیره حاوی روغن گیاهی ذرت، جیره حاوی مخلوط روغن گیاهی کانولا  و ذرت و جیره بدون روغن و هر یک در سه تکرار جهت تغذیه کرم N. diversicolor به ­مدت 2 ماه انجام شد. پس از اتمام دوره پرورش، شاخص ­های رشد در هر تیمار شامل افزایش زی­ توده کل، طول L3، ضریب رشد ویژه، افزایش وزن بدن و درصد بازماندگی اندازه ­گیری شد. نتایج نشان داد که اختلاف معنی ­داری در روند رشد کرم نرئیس تغذیه شده از جیره­ های حاوی روغن­ های مختلف با تیمار شاهد (کرم نرئیس تغذیه شده از جیره غذایی بدون روغن) مشاهده نگردید. این درحالی بودکه میزان زی ­توده نهایی، افزایش میزان زی ­توده و درصد افزایش وزن در کرم ­های تغذیه شده با جیره حاوی روغن­ های کانولا و مخلوط کانولا و ذرت نسبت به سایر تیمارها بیش ­تر بود. تمامی اسیدهای چرب اشباع و غیراشباع در جیره­ های غذایی به ­استثناء تیمار شاهد در بدن کرم نرئیس بیش ­تر از میزان آن­ ها در جیره غذایی بود. بیش ­ترین میـزان EPA و نسبت ⍵-3/⍵-6 در کرم نرئیس تغذیه شده با جیره حاوی روغن کانولا بـیش ­تر از جیره غذایی حاوی روغن کانولا بود. در مجموع تیمار 1 شامل جیره غذایی حاوی روغن کانولا در افزایش میزانشاخص ­های رشد و اسیدهای چرب غیراشباع کرم نرئیس نسبت به تیمارهای دیگر مناسب­­­­ ­تر بود.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of dietary lipid sources (canola and corn oil) on growth, survival, and fatty acid profile of Nereis diversicolor

نویسندگان [English]

  • Zabih Ollah Pajand
  • Korosh Haddadi Moghadam
  • Frouzan Choubian
  • Esmaeil Farzaneh
  • Esmaeil Hoseinnia
  • Alireza Ashori
  • Javad Seyadfar
Caspian Sturgeon International Research Institute, Agricultural Research, Education and Promotion Organization, Rasht, Iran
چکیده [English]

The study of effect four diets formulated containing vegetable oils including canola and corn oils and their mixture, in three replications each, was carried out to feed N. diversicolor during two months. At the end of the experiments, growth performance in each treatment included total biomass, L3 length, specific growth rate (SGR), body weight increase (BWI), and survival rate were measured. Biochemical composition including total protein, total fat and fatty acid profile of diets and worms body carcass were analyzed. The results showed that there was no significant difference in the growth performance of worm from diets containing different oils with control treatment (worms fed from diet of without oil). The results indicate that the fat in the diet has no effect on the growth of the worms, but the presence of these vegetable oils in carcass composition was important. The results of this study showed that all saturated and unsaturated fatty acids in the diet, except of the control treatment in the N. diversicolor, were higher than their dietary. In the present study, N. diversicolor, fed from diet containing of canola oil, had the highest ⍵-3 fatty acids. The highest EPA level and ratio of ⍵-3/⍵-6 in the worms fed canola oil were higher than formulated diet containing canola oil. Totally, treatment 1, including diets containing canola oil, was more suitable for increasing the growth perfoermance and unsaturated fatty acids of worm than other treatments.

کلیدواژه‌ها [English]

  • Nereis diversicolor
  • Growth
  • Survival
  • Canola and corn oil
  • Unsaturated Fatty acids

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فصلنامه محیط زیست جانوری
دوره 11، شماره 3
مهر 1398
صفحه 379-388

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