اثر مکمل غذایی جلبک کلرلا (Chlorella vulgaris) بر عملکرد رشد، تغذیه و ترکیبات شیمیایی بدن ماهی کفال خاکستری (Mugil cephalus Linnaeus 1758)

نوع مقاله : تغذیه

نویسندگان

گروه شیلات، دانشکده علوم دریایی، دانشگاه دریانوردی و علوم دریایی چابهار

چکیده

تحقیق حاضر به­ منظور بررسی اثر جلبک کلرلا (Chlorella vulgaris) بر شاخص­ های رشد، تغذیه (ضریب تبدیل غذایی، میزان غذای دریافتی، راندمان مصرف پروتئین، راندمان مصرف چربی) و ترکیب شیمیایی ماهی کفال خاکستری به­ مدت 60 روز صورت گرفت. در این مطالعه، تعداد 120 قطعه ماهی کفال ماهی با میانگین وزنی 2/01±14/95 گرم در یک طرح کاملاً تصادفی با 4 تیمار آزمایشی و 3 تکرار (با تعداد 10 قطعه در هر تکرار) مورد آزمایش قرار گرفتند. تیمار شاهد (بدون پودر جلبک) و تیمارهای آزمایشی 2، 3 و 4 به­ ترتیب دارای 5، 10و 15 گرم بر کیلوگرم پودر جلبک در غذا بودند. در پایان آزمایش، بالاترین طول نهایی 0/10±11/08 سانتی ­متر، میزان افزایش وزن به ­دست آمده 12/39±216/85 گرم، میزان رشد روزانه 0/18±6/53 درصد، نرخ رشد ویژه 0/07±0/90، کم ­ترین میزان غذای دریافتی 0/03±0/99 درصد، بالاترین راندمان مصرف پروتئین 0/24±4/37 درصد و بالاترین راندمان مصرف چربی 0/09±1/23 درصد در تیمار حاوی 5 گرم بر کیلوگرم پودر جلبک مشاهده شد که با تیمار شاهد دارای تفاوت معنی­ دار بود (0/05>P). بیش ­ترین میزان پروتئین خام و رطوبت در تیمار حاوی 10 گرم جلبک بر کیلوگرم غذا مشاهده شد. در مجموع براساس نتایج این تحقیق افزودن 5 گرم بر کیلوگرم پودرجلبک کلرلا به جیره غذایی ماهی کفال خاکستری به ­منظور بهبود شاخص ­های رشد (میزان غذای دریافتی، میزان رشد روزانه) و کیفیت لاشه در این ماهی پیشنهاد می ­شود.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of dietary Chlorella vulgarissupplementation on growth performance, feed and body chemical composition of grey mullet , Mugil cephalus Linnaeus 1758

نویسندگان [English]

  • Paria Akbary
  • Shabaldin Gorgij
Department of fisheries, Marine Sciences Faculty, Chabahar Maritime University, Chabahar, Iran
چکیده [English]

This experiment was conducted to evaluate the effect of Chlorella vulgarispowder on the growth performance (final weight (FW), final length (LW), weight gain (WG), specific growth rate, daily growth ratio (DGR), condition factor (CF), hepatosomatic index (HSI)), feed indices (feed conversion rate (FCR), voluntary feed intake (VFI), protein efficiency ratio (PER) and lipid efficiency ratio (LER)) and body chemical (protein, fat, moisture and ash) Mugil cephalusfor 60 days. The experiment was conducted in a completely randomized design with 120 of grey mullet (with average weight of 14.95±2.01g) in 4 treatments and 3 replicates (n=10 in each replicate) and included: control group without using algae extract, an another groups (treatment 2,3and 4) the amounts of this extract were 5,10 and 15 g/kg food. The results showed that at the end of experiment, the highest LW (11.08±0.10 cm), WG (216.85 ± 12.39 g), DGR (6.53±0.18%), SGR (0.90± 0.07), the lowest VFI (0.99±0.03 %), the highest PER (4.61±0.27), the highest PPV (39.48±2.54), the highest crude protein (0.99±0.0%), the highest crude lipid (10.37±0.24%) and the highest LER (1.23±0.09%) were observed in the diet containing 5 g /kg algae extract in all of these parameters, treatment 2 showed a significant difference compared with control treatment (P<0.05). The highest protein and moisture were shown in in the diet containing 10 g /kg algae extract. Finally, the present results suggest that diet containing 5 g/kg Chlorella vulgariscould improve growth, feed performances and carcass quality in M. cephalus.
 

کلیدواژه‌ها [English]

  • Grey mullet
  • Chlorella alga
  • Carcass composition
  • Growth
  • Stimulator
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