بررسی اثرات استفاده از روغن ریزپوشانی شده در جیره غذایی میگوی بزرگ آب شیرین Macrobrachium rosenbergii بر فاکتورهای رشد، آنالیز تقریبی فیله و برخی از خصوصیات فیزیکی پلت

نوع مقاله : تغذیه

نویسندگان

1 دانشکده شیلات و علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، صندوق پستی: 578

2 گروه شیلات، دانشگاه تهران، پردیس کشاورزی و منابع طبیعی کرج، صندوق پستی: 4111

چکیده

در این تحقیق تاثیر استفاده از روغن­های ریزپوشانی شده در جیره غذایی میگوی آب شیرین بر پارامترهای رشد و آنالیز تقریبی فیله مورد ارزیابی قرار گرفت. 6 جیره غذایی با میزان پروتئین یکسان (33 درصد) و سه سطح چربی  6، 9 و 12 درصد  تهیه شد که در هر سطح چربی دو جیره ساخته شد که در یکی از جیره­ها (تیمارهای 1، 3 و 5) از روغن بدون ریزپوشانی استفاده شد و در جیره دیگر (تیمارهای 2، 4 و 6) از روغن ریزپوشانی شده استفاده شد. اضافه وزن و ضریب تبدیل غذایی در سطح چربی 12 درصد بین تیماری که روغن آن ریزپوشانی نشده بود (تیمار 5) با تیمار 6 که روغن آن ریزپوشانی شده بود تفاوت معنی­دار (0/05 >P)  نشان دادند. هم­چنین تیمار 6 بیش­ترین نرخ رشد ویژه و شاخص کارایی پروتئین را دارا بود و به­طور معنی­داری (0/05>P) با تیمارهای 1 و 2 تفاوت داشت. اثر سطوح چربی تاثیر معنی­داری در فاکتورهای رشد نشان داد اما  اثر ریزپوشانی و اثر متقابل (اثر سطوح چربی و اثر ریزپوشانی) معنی­داری نبودند (0/05<P). ریزپوشانی کردن در سطح چربی 12 درصد سبب افزایش معنی­دار (0/05>P) در چربی فیله شد و اثر سطوح چربی و اثر ریزپوشانی نیز معنی­دار بود (0/05>P). فاکتورهای فیزیکی پلت تحت تاثیر معنی­دار ریزپوشانی روغن قرار گرفتند (0/05>P). که این تاثیر خصوصاً در سطح چربی 9 و 12 درصد بارزتر بود. درکل ریزپوشانی کردن روغن­ها در سطح چربی جیره 6 درصد هیچ تاثیر معنی­داری بر فاکتورهای رشد، چربی فیله و شاخص­های فیزیکی پلت نداشت.

کلیدواژه‌ها

عنوان مقاله [English]

The effects of microcapsulated oil in giant fresh water prawn Macrobrachium rosenbergii on Growth, body proximate composition and physical qualities of pellet

نویسندگان [English]

  • Reza Asadi 1
  • Abdolsamad Keramat Amiri 1
  • Hossein Oragi 1
  • Seyed vali Hosseini 2
1 Faculty of Fisheries and Animal Sciences, University of Agricultural Sciences and Natural Resources, Sari, POBox: 578
2 Department of Fisheries, University of Tehran, College of Agriculture and Natural Resources, Karaj, POBox: 4111
چکیده [English]

The effects of Microcapsulation oil on growth factor and body proximate composition of the giant fresh water prawn and some physical qualitative factors of its pellet were investigated. For this purpose, 6 pellet treatments with isoproteic 33 percent were prepared. Three level of fat 6, 9 and 12 percent were considered that tow diets made at each fat level. In one of the diet (1, 3 and 5) oil was not microcapsulated and microcapsulated in other diet (2, 4 and 6). In 12 percent lipid level, weight gain and feed conversion ratio were significantly different (P< 0.05) in treatment without microcapsultion oil (5) and microcapsulated oil treatment (6). Also specific growth rate and protein efficiency ratio was significantly (P< 0.05) higher in 6 diet  than to 1 and 2 diets. In growth factor, effect of lipid level was significant but microcapsule effect and interaction were not significant. The microcapsulation in diet 12 percent lipid level cased to significant (P< 0.05) increase in fillet fat and also in effect of lipid level and microcapsule effect. In physical qualities of pellet like durability, fat leaching, density and sinking velocity were significantly (P< 0.05) influenced to microcapsulation, especially in diets with 9 and 12 percent fat level. In conclusion oil microcapsulatin in 6 percent lipid level was not significant on growth factor, fillet fat and physical qualities of pellet.

کلیدواژه‌ها [English]

  • Fillet fat
  • Diet lipid level
  • Pellet durability
  • Pellet fat leaching

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فصلنامه محیط زیست جانوری
دوره 10، شماره 4
دی 1397
صفحه 443-450

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