تأثیر سطوح مختلف پودر گیاه گلرنگ (Carthamus tinctorius) بر عملکرد رشد و رنگ‌پذیری ماهی سوروم (Heros severum)

نوع مقاله : مقاله کامل علمی - پژوهشی

نویسندگان

1 نویسنده مسئول، گروه تکثیر و پرورش آبزیان، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.

2 گروه تکثیر و پرورش آبزیان، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران.

چکیده

هدف از تحقیق حاضر بررسی عملکرد رشد و رنگ‌پذیری ماهی سوروم تغذیه شده با جیره‌های حاوی پودر گیاه گلرنگ در سطوح صفر (شاهد)، 3، 6، 9 و 12 درصد به مدت 8 هفته بود. هر تیمار شامل: 3 تکرار بود و در هر تکرار تعداد 10 قطعه ماهی قرار گرفت. به منظور بررسی عملکرد رشد، زیست‌سنجی ماهیان هر دو هفته یک‌بار انجام شد و شاخص‌هایی از قبیل: وزن نهایی، میزان افزایش وزن، میزان غذای مصرفی، ضریب تبدیل غذایی، نرخ رشد ویژه، کارایی غذا، شاخص وضعیت، شاخص قیمت و درصد بازماندگی محاسبه شد. در پایان دوره پرورش، از 6 ماهی در هر تیمار عکس دیجیتال با شرایط ثابت و نور یکسان تهیه شد و برای ارزیابی میزان تغییر رنگ ایجاد شده از سیستم رنگ‌سنجی L*a*b* با استفاده از نرم افزار فتوشاپ مورد بررسی قرار گرفت و مقادیر هیو (معرف رنگ دیده شده) و کروما (معرف شدت وضوح رنگ) تعیین شد. از نرم افزارSPSS (version 19) برای آنالیز داده‌ها استفاده شد. نتایج نشان داد که برخی از شاخص‌ها نظیر ضریب تبدیل غذایی، نرخ رشد ویژه، کارایی غذا، شاخص وضعیت، شاخص قیمت و درصد بازماندگی در تیمار دوم (6 درصد) به‌طور معناداری در مقایسه با سایر گروه‌ها ارتقا یافت. بر اساس یافته‌های این مطالعه، اختلاف قابل توجهی در مولفه‌های رنگ‌سنجی پوست ماهیان در ناحیه باله و تنه در گروه‌های مختلف آزمایشی مشاهده نشد، هرچند که این مؤلفه‌ها در تیمار دوم (6 درصد) نسبتاً بهبود یافته بود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of different levels of safflower powder (Carthamus tinctorius) on growth performance and staining of Heros severum

نویسندگان [English]

  • Mohammad Sudagar 1
  • Amin farahi 2
  • Haniyeh Kheirabadi 2
  • Sepide Firouzbakhsh 2
1 Corresponding Author, Dept. of Aquaculture, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
2 Dept. of Aquaculture, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
چکیده [English]

The color of ornamental fish is effective factor on sale and economic value. Recent year, due to the expensive price of synthetic pigments, a lot of research were done to evaluate the potential of natural materials as a pigment. The aim of this study was to investigate the growth performance and tonality of Severum fish fed with experimental diets supplemented with different levels (0, 3, 6, 9 and 12%) of safflower powder for 8 weeks. Each treatment triple replicates water and 10 fish were used in each replication. In order to evaluate the growth performance, biometry of fish was done every two weeks and indices such as final weight, weight gain, feed consumption, feed conversion ratio, specific growth rate, feed efficiency, condition factor, price index, and survival rate were calculated. At the end of the feeding period, digital photograph, were taken reom 6 fish per treatment with constant and uniform light distribution and to assess the rate of change of the color obtained colorimetric system L * a * b * was evaluated using the Photoshop software and Hab values and chroma was determined. Statistical analysis of data was performed by One -Way ANOVA with Duncan test at the level of 95 % using SPSS 16. Statistical significance was set at the level of P < 0.05 with ± standard deviation (SD). The results showed that some indices, such as feed conversion ratio, specific growth rate, feed efficiency, condition factor, price index and survival rate in second treatment (6%) were significantly improved compared with the other groups. According to the findings of this study, remarkable differences were not observed in fish skin (in fin and trunk) coloration indices among experimental groups, however, these components in the T2 (6%) was improved, relatively.

کلیدواژه‌ها [English]

  • Safflower
  • Growth
  • Colloration
  • Severum

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مجله بهره برداری و پرورش آبزیان
دوره 13، شماره 3
مهر 1403
صفحه 211-223

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