ارزیابی عصاره جلبک قرمز جانیا (Jania adhaerens J.V. Lamouroux) به عنوان مکمل غذایی در ماهی کفال خاکستری (Mugil cephalus)

نوع مقاله : تغذیه

نویسندگان

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

چکیده

هدف از این تحقیق، ارزیابی استفاده از عصاره جلبک قرمز جانیا (Jania adhaerens) برای اولین ­بار به­ عنوان مکمل غذایی بر عملکرد رشد، تغذیه، ترکیب شیمیایی بدن و آنزیم ­های گوارشی ماهی کفال خاکستری (Mugil cephalus) می ­باشد. چهار رژیم غذایی به ­ترتیب حاوی 0، 5، 10 و 15 گرم عصاره جلبک جانیا بر کیلوگرم غذا تهیه شد. 120 قطعه ماهی کفال خاکستری با میانگین وزنی 2/01±14/95 (میانگین± خطای معیار) گرم در 4 گروه برطبق رژیم ­های غذایی مختلف به ­صورت تصادفی به ­ترتیب 0 (گروه شاهد)، 5 ، 10 و 15 گرم عصاره جانیا بر کیلوگرم غذا تقسیم ­بندی شدند. بین گروه­ های آزمایشی و گروه شاهد از نظر وزن نهایی، میزان غذای دریافتی، میزان افزایش وزن به ­دست آمده، راندمان مصرف پروتئین و راندمان مصرف چربی اختلاف معنی ­داری مشاهده شد (0/05>P). هم­ چنین بیش ­ترین میزان شاخص­ های فوق در گروه حاوی 10 گرم عصاره جانیا بر کیلوگرم غذا مشاهده شد. بیش ­ترین میزان پروتئین خام، رطوبت لاشه، فعالیت آنزیم ­های پروتئآز، آمیلاز و لیپاز و کم ­ترین میزان چربی در گروه حاوی 15 گرم جانیا بر کیلوگرم غذا مشاهده شد. هرچند از نظر فعالیت آنزیم لیپاز بین گروه 10 و 15 گرم جانیا بر کیلوگرم غذا اختلاف معنی­ داری مشاهده نشد (0/05<P). در کل، نتایج این تحقیق نشان داد که ماهیان کفال تغذیه شده با رژیم غذایی حاوی 10 و 15 گرم عصاره جانیا بر کیلوگرم غذا عملکرد رشد، تغذیه، ترکیب لاشه و فعالیت آنزیم ­های گوارشی بهتری را در مقایسه با تیمار شاهد نشان دادند و استفاده از 10 گرم عصاره جانیا بر کیلوگرم غذا در جیره غذایی ماهی کفال خاکستری توصیه می ­گردد. 

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of red seaweed Jania adhaerens J.V. Lamouroux extract as a feed additive in grey mullet, Mugil cephalus

نویسندگان [English]

  • Paria Akbary
  • Farzaneh Debashi
Department of Fisheries, Faculty of Marine Sciences, Chabahar University of Naval and Marine Sciences, Chabahar, Iran
چکیده [English]

The aim of this study was to evaluate the use of seaweed, Jania adhaerens extract (JE) for the first time as dietary additive on the growth performance, feed utilization, body composition and digestive enzymatic activities of grey mullet, Mugil cephalus. Four experimental diets were prepared: JE0 as a control group; JE5, JE10 and JE 15 which included 0, 5, 10 and 15 g JE kg-1 diet respectively. One hundred twenty grey mullet weighting 14.95± 2.01 g (mean± SE) was randomly divided into four groups corresponding to the different feeding regimes. Significant differences (P<0.05) were evident in final weight (FW), weight gain (WG), protein efficiency ratio (PER) and lipid efficiency ratio (LER)) between the control group and treatment. The highest levels for all previous parameters were shown in JE10. Also, the highest crude protein, moisture and amylase, lipase, protease activities the lowest crude lipid were observed in JE15. However no significant difference (P>0.05) were observed in lipase activity, between JE10 and JE15 diet (P>0.05).  Overall, the results of the experiment revealed that grey mullet fed with JE10 and JE15 diets showed better growth performance, feed utilization, body composition and digestive enzymatic activities than the control group, and use of diet containing 10 g/kgJ.adhaerens could suggest for grey mullet.

کلیدواژه‌ها [English]

  • Red marine seaweed
  • Grey mullet
  • Growth Performance
  • Digestive enzymatic activities

مراجع

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فصلنامه محیط زیست جانوری
دوره 11، شماره 2
مرداد 1398
صفحه 277-282

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