تأثیر عصارۀ هیدروالکلی گیاه پنج انگشت (.Vitex agnus-castus L) بر شاخص‌های رشد و نرخ بقاء در گورخر ماهی (Danio rerio)

نویسندگان

دانشکده علوم کشاورزی و منابع طبیعی گرگان

چکیده
در ﻣﻄﺎﻟﻌۀ ﺣﺎﺿﺮ، ﺗﺄﺛﻴﺮ عصارۀ هیدروالکلی گیاه پنج ­انگشت (Vitex agnus-castus) به منزلۀ مکمل غذایی بر شاخص­های رشد و تغذیه­ ای در لاروهای گورخرماهی (Danio rerio) به ­مدت چهار ماه بررسی شد. لاروها از زمان شروع تغذیۀ فعال تا سن چهارماهگی (میانگین وزن: 1/0±1/2 گرم، میانگین طول: 3/0±2/5 سانتی­متر) با جیرۀ غذایی حاوی عصارۀ گیاه تغذیه شدند. ماهیان تغذیه­ شده با جیرۀ غذایی حاوی عصارۀ گیاهی در شاخص­ های رشد، تغذیه ­ای و بقاء نسبت به گروه شاهد در وضعیت بهتری قرار داشتند (p<0.05). استفاده از عصاره تأثیر معنی­ داری بر میزان بازماندگی بچه­ ماهیان نداشت (p>0.05). جیرۀ حاوی 15 گرم عصاره به­ طور معنی­ داری بهترین ضریب تبدیل غذایی (05/0±071/0) را ایجاد کرد (p<0.05). با افزایش مقدار عصارۀ جیرۀ غذایی، ضریب رشد ویژه ماهیان افزایش یافت. بالاترین و پایین­ ترین شاخص افزایش وزن بدن به ترتیب در تیمار T3 (22/33±583/541) و T0 (71/17±962/252) بدست آمد (p<0.05). بالاترین شاخص وضعیت در تیمار T3 (011/0±447/4) و کمترین مقدار در تیمار T0 (021/0±525/2) مشاهده شد. در مجموع، این تحقیق پیشنهاد می­کند اﻓﺰودن 15 گرم عصاره به جیرۀ غذایی گورخرماهی ﻣﯽ­ﺗﻮاﻧﺪ در ﺑﻬﺒﻮد ﻋﻤﻠﮑﺮد رﺷﺪ و ﺗﻮﻟﯿﺪ ﻧﻬﺎیﯽ مؤثر واقع شود و ﺑﻪمنزلۀ ﻣﮑﻤلی ﻣﻨﺎﺳﺐ ﺑﺮای جیرۀ ﻏﺬایﯽ کپورماهیان در ﻧﻈﺮ گرفته شود.

کلیدواژه‌ها


عنوان مقاله English

The effects of hydro-alcoholic extract of Vitex agnus-castus L. on the growth indices and survival rate in Zebrafish (Danio rerio)

نویسندگان English

Tayebeh Enayat Gholampour
Valiollah Jafari
Mohamad Reza Imanpour
Hamed Kolangi Miandare
چکیده English

In the research project performed, the effects of different levels of hydro-alcoholic extract Vitex agnus-castus were investigated as nutritional supplement on growth parameters of Danio rerio for 4 months. Since the beginning of the feeding phase up to the age of 4 months (average weight: 2.1±0.1g, length: 5.2±0.3 cm), larvae were fed with expe-rimental diets. Fish treated with diets containing plant extracts had higher growth and survival rate than the control gr-oup (p<0.05). Differences in the level of the extract had no significant effect on the survival rate (p<0.05). The results revealed that the diet containing 15 gr of the extract resulted in the best FCR significantly (p<0.05). By increasing the extract in the diet during the experiment, SGR increased. The highest and the lowest %BWG were observed in treatm-ents T3 and T0 respectively (p<0.05). The highest CF was observed in T3 and the lowest was obtained in T0. All in all, this study proposed that the addition of 15 gr of hydro-alcoholic extract of Vitex agnus-castus in the diet of zebrafish could improve the performance of the growth indices and increase the final biomass. In addition, this extract could be considered as a suitable supplement for Cyprinidae diet.

کلیدواژه‌ها English

phytoestrogen
nutritional supplement
aquaculture
ornamental fish
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  • تاریخ دریافت 18 خرداد 1405
  • تاریخ انتشار 18 خرداد 1405