مجله علوم آبزی پروری

مجله علوم آبزی پروری

تأثیر بکارگیری پودر جلبک اسپیرولینا و اسیدآمینه متیونین در جیره ازون‌برون‌های جوان (Acipenser stellatus) بر عملکرد رشد و ترکیب لاشه آنها

نوع مقاله : مقاله پژوهشی

نویسندگان
گروه شیلات، دانشکده منابع طبیعی و محیط‌زیست، دانشگاه ملایر، ملایر، ایران.
چکیده
تحقیق حاضر با هدف بررسی اثر افزایش اسید آمینه متیونین و جلبک اسپرولینا بر شاخص‌های رشد، بازماندگی و ترکیب لاشه در بچه‌ماهی اوزون برون (Acipenser stellatus) در طی 8 هفته صورت گرفته است. بدین‌منظور، تعداد 48 قطعه بچه‌ماهی با میانگین وزن اولیه 1/3± 20/01 به‌‌‌‌‌‌طور تصادفی در 6 تانک توزیع گردید. ماهیان دو بار در روز به میزان 4 درصد وزن بدن با خوراک مکملسازی شده با اسید آمینه متیونین (1/5 درصد) و اسپرولینا ( 5 درصد) و خوراک شاهد تغذیه شدند. در پایان شاخصهای رشد و تغذیه شامل ضریب چاقی، درصد افزایش وزن بدن، ضریب رشد ویژه، ضریب تبدیل خوراک، شاخص احشائی و میزان بازماندگی و همچنین ترکیب لاشه بدن ارزیابی گردید. براساس نتایج، شاخص‌های افزایش وزن بدن و شاخص احشایی در مقایسه با خوراک شاهد از نظر آماری تفاوت معنی داری داشتند (0/05>P). هرچند سایر شاخص های اندازه گیری شده از نظر آماری تفاوتی را نشان ندادند، ولی در طی دوره آزمایش این شاخص ها در مقایسه با خوراک شاهد از نظر مقادیر به‌دست آمده بالاتر بودند (0/05>P). همچنین مقادیر پروتئین خام، چربی خام، رطوبت و خاکستر در ترکیب لاشه در هر دو گروه تقریباً یکسان و از نظر آماری اختلاف معنی‌داری را نشان نداد (0/05<P). بر این اساس، به‌نظر می‌رسد افزودن مقادیر مشخص شده متیونین و اسپرولینا می‌تواند بر عملکرد رشد ماهی اوزون برون مؤثر باشد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

The effect of using Spirulina algae powder and the amino acid methionine in the diet of young stellate sturgeon (Acipenser stellatus) on their growth performance and carcass composition

نویسندگان English

Davoud Mohammadrezaei
Mohammad Dadfar
Ali Akbar Ghafarizadeh
Department of Fisheries, Faculty of Natural Resources and Environment, Malayer University, Malayer, Iran.
چکیده English

The present study aimed to investigate the effect of increasing the amino acid methionine and Spirulina algae on growth, survival and carcass composition indices in juveniles of the stellate sturgeon (Acipenser stellatus) during 8 weeks. So, 48 juveniles with an average initial weight of 20.01±1.3 g were randomly distributed in 6 tanks. The fish were fed twice a day at a rate of 4% of body weight with feed supplemented with the amino acid methionine (1.5%) and Spirulina (5%) and control feed. At the end, growth and nutritional indices including condition factor (CF), body weight gain percentage (BWG), specific growth rate (SGR), feed conversion ratio (FCR), visceral index (VI) and survival rate as well as carcass composition were evaluated. Based on the results, body weight gain indices and visceral index were statistically significantly different compared to the control feed (P<0.05). Although other measured indices did not show any statistical difference, during the experimental period these indices were higher in terms of values ​​obtained compared to the control diet (P<0.05). Also, the amounts of crude protein, crude fat, moisture, and ash in the carcass composition were almost the same in both groups and did not show any statistically significant differences (P>0.05). Accordingly, it seems that adding the specified amounts of methionine and Spirulina in the present study can be effective on the growth performance of stellate sturgeon.

کلیدواژه‌ها English

;">Acipenser stellatus, ;">Carcass composition, ;">Growth indices, ;">Methionine and Spirulina
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انتشار آنلاین از 12 تیر 1405