تأثیرات سطوح مختلف کربوهیدرات جیره در شاخص‌های رشد و ترکیبات شیمیایی بدن میگوی رودخانه‌ای شرق (Macrobrachium nipponense de Haan, 1849)

نوع مقاله: مقاله پژوهشی

نویسندگان

استادیار، گروه شیلات دانشکدة منابع طبیعی، دانشگاه گیلان، ایران

چکیده

به منظور بهبود شرایط رشد گونه‌های پرورشی، تعیین سطوح مناسب مواد مغذی انرژی‌زا، به‌ویژه میزان کربوهیدرات، ضروری است. با توجه به اینکه تاکنون مطالعات جامعی دربارة نیازهای غذایی با تأکید بر اثر کربوهیدرات در این گونه انجام نشده است، از این رو آزمایشی تغذیه‌ای به منظور بررسی اثر مقادیر مختلف کربوهیدرات در عوامل رشد و ترکیب شیمیایی بدن میگوی رودخانه‌ای شرق انجام شد. پنج سطح 15، 20، 25، 30 و 35 درصد کربوهیدرات در سه تکرار برای هر یک از تیمارهای تغذیه‌ای با پروتئین ثابت (61/.± 35 درصد) و چربی ثابت (43 /0 ± 8 درصد) فرموله و تنظیم شد. تعداد 225 قطعه میگوی جوان با میانگین وزن 33 /0 ± 5/1 گرم به طور کاملاً تصادفی بین 15 عدد مخزن آکواریومی 200 لیتری، توزیع شد. میگوهای جوان تغذیه‌شده با جیرة حاوی 30 درصد کربوهیدرات مطلوب‌ترین شرایط را از نظر شاخص‌های رشد و تغذیه‌ای نشان دادند و با سایر تیمارها اختلاف معناداری داشتند (05/0< P). نتایج شاخص‌های رشد و تغذیه‌ای مانند درصد افزایش وزن نسبی (RGR)، ضریب رشد ویژه (SGR)، کارایی پروتئین (PER)، ضریب تبدیل غذا (FCR) و درصد بازماندگی (SR) در تیمارهای 1 و 5 با سطح 15 و 35 درصد کربوهیدرات تفاوت معناداری نشان ندادند (05/0 P>). مقایسة میانگین ترکیب شیمیایی لاشة میگوهای جوان مورد آزمایش تفاوت معناداری در میزان پروتئین خام، چربی خام، خاکستر کل و رطوبت در بین تیمارهای 2، 3 و 4 نشان نداد (05/0 > P)، در حالی که تیمارهای 1 و 5 از میزان رطوبت بیشتر و چربی و پروتئین کمتری در لاشه برخوردار بودند (05/0 < P).

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of different level of carbohydrate on growth indices and body composition of oriental river prawn (Macrobrachium nipponense)

نویسندگان [English]

  • Hamid Allaf Noberian
  • Majidreza Khoshkholgh
Assistant Professor, Department of Fisheries, Faculty of Natural Resources, Guilan University, Someesara, Iran
چکیده [English]

In order to improving suitable growing condition for cultured species, knowledge of energy yielding
nutrients, especially information about carbohydrate requirement are of oriental river prawn is
essential, since there is not exclusive studies about carbohydrate requirement about this species, hence
an nutritional experiments was conduct in order to find out the optimum level of carbohydrate. Five
treatments with levels 15, 20, 25, 30 and 35 percent with iso- nitrogenous (35%) and iso- lipidic
(8.5%) we formulate each treatment was conducted in triplicate. Two hundred and twenty five juvenile
prawn (of size 1.5±0.33g) were randomly distributed between 15 aquarium tank of 200 L capacity.
The juvenile prawns which fed diet containing 30% carbohydrate were shown optimum condition in
growth indices and was significant with other treatments (P<0.05). growth Treatments 2 and 3 (20 and
25%) had not showed any significant differences in growth indices (P≥0.05). The comparison of mean
body chemical comparison of juvenile prawns carcass in tested diets in treatments 1, 2 & 3 had not
showed significant differences in the amount of crude protein, lipid, total ash, and moisture (P>0.05):
however, treatments 1 & 5 had higher amount of moisture ,with lower amount of protein and lipid
value in their body composition (P<0.05).

کلیدواژه‌ها [English]

  • Carbohydrate
  • chemical body composition
  • growth indices
  • Macrobrachium nipponense
  • oriental river prawn
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