نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار ،گروه شیلات، دانشکده دامپزشکی، دانشگاه آزاد اسلامی واحد بابل، مازندران، ایران

2 استادیار،گروه شیلات، دانشکده دامپزشکی، دانشگاه آزاد اسلامی واحد بابل، مازندران، ایران

3 استادیار ، گروه شیلات، دانشکده کشاورزی و منابع طبیعی، دانشگاه آزاد اسلامی واحد آزادشهر، گلستان، ایران

4 استادیار ،گروه شیلات، دانشکده کشاورزی و منابع طبیعی، دانشگاه آزاد اسلامی واحد آزادشهر، گلستان، ایران

چکیده

اثر مقادیر مختلف پودر سرخ گیاه زالزالک وحشی در غذای ماهی سوروم  بر روی فاکتورهای رشد و تغذیه‌ای و همچنین تغییرات رنگ پوست مورد بررسی قرار گرفت. تیمار یک به عنوان تیمار شاهد بوده و هیچ رنگدانه‌ای به آن  افزوده نشد. تیمار دو ، یک گرم آستاگزانتین و به تیمارهای سه ، چهار و پنج نیز  به ترتیب پنج، 15 و 25 گرم در کیلوگرم غذا پودر زالزالک وحشی افزوده شد. رنگدانه پوست ماهیان تیمارهای مختلف به روش طیف سنجی، مورد سنجش قرار گرفت. نتیجتاً پودر زالزالک وحشی در مقایسه با آستاگزانتین تاثیر معنی داری بر روی برخیاز فاکتورهای رشد و تغذیه ای دارد (p<0.05 اما این دو ماده، از لحاظ ایجاد رنگ بازار پسند در پوست تفاوت معنی داری با هم ندارند (P>0.05) و در نهایت پیشنهاد می گردد 25 گرم در کیلوگرم پودر زالزالک وحشی جهت ایجاد رشد و رنگ مطلوب به غذای این ماهی  افزوده گردد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

The effect of Hawthorn (Crataegus monogyna) powder on skin dye, growth and nutrition indices of Convict Cichlid (Heros severus)

نویسندگان [English]

  • Reza Changizi 1
  • Shayan Ghubadi 2
  • Zahra GhiyasVand 3
  • Mahshid ShamloFar 4

1 Assistant Professor, Department of Fisheries, Faculty of Veterinary Medicine, Islamic Azad University, Babol Branch, Mazandaran, Iran  

2 Assistant Professor, Department of Fisheries, Faculty of Veterinary Medicine, Babol Islamic Azad University, Mazandaran, Iran  

3 Assistant Professor, Department of Fisheries, Faculty of Agriculture and Natural Resources, Islamic Azad University, Azadshahr Branch, Golestan, Iran  

4 Assistant Professor, Department of Fisheries, Faculty of Agriculture and Natural Resources, Islamic Azad University, Azadshahr Branch, Golestan, Iran

چکیده [English]

In this study, we have investigated the effects of red hawthorn powder= Valik (RHP) (Crataegus monogyna) as a natural pigment sources and Astaxanthin as synthetic pigment source on growth, and skin color of Severum (Heros severus) with initially average weight 8.5 ± 0.57 for a period of 60 days. Basal diet was supplemented with 0 (control), 1 g kg-1 Astaxanthin, 5, 15 and 25 g kg-1RHP in a totally randomized design trial in triplicate groups. The results showed significant differences in growth and skin color between control and treatment groups (P<0.05). There was a statistically significant increase (P<0.05) in growth performances level in group treated with 25 g kg-1RHP. The highest and the lowest growth performances were observed in control and 25 g kg-1RHP, respectively. Total carotenoid content of the fish was determined spectrophotometrically at the end of the experiment. As a result, a visible change of color in the skin of the fish fed on the feed containing Astaxanthin was observed with 0.58±0.2 mg g-1 of pigment accumulation while a relatively change of color was observed in the skin of other fish that were fed on the feed containing powder RHP with 0.54±0.2 mg g-1 of pigment accumulations, respectively (p>0.05). Therefore, it was determined that these pigment sources have an effect on the color of Severum fish.

کلیدواژه‌ها [English]

  • astaxanthin
  • Carotenoid
  • Red hawthorn
  • Severum
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