بررسی اسیدهای چرب و ترکیب عضله ماهی سفید دریای خزر ( Rutilus frisii ) در شرق و غرب مازندران در زمستان و بهار

نوع مقاله: مقاله علمی - پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

2 دانشیار گروه شیلات، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری ، ایران

3 مربی گروه شیلات، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

چکیده

مقدمه: ماهیسفید دریای خزر ) Rutilus frisii ( از لحاظ مصرف اهمیت بالایی دارد. از آنجا که ترکیب بیوشیمیایی و اسیدهای چرب عضله
ماهی میتواند متاثر از محل صید باشد، هدف از این پژوهش بررسی تغییرات ترکیب اسیدهای چرب و ترکیبات فیله ماهی سفید در دو ساحل
شرق )ساری( و غرب )نوشهر( دریای خزر در فصول زمستان و بهار است.
مواد و روشها: تعداد 6 قطعه از هر جنس ماهی سفید در شرق )ساری( و غرب )نوشهر( استان مازندارن در زمستان و بهار خریداری شد.
اسیدهای چرب به روش ترانس آمیلیشن و با کمک کروماتوگرافی گازی شناسایی، و ترکیبات عضله با دستگاه سوکسله و روشهای استاندارد
تعیین شدند.
یافتهها: اسیدهای چرب استئاریک اسید، اولئیک اسید و DHA در ماهی نر ساری در زمستان با تفاوت معناداری نسبت به سایر اسیدهای
چرب، بیشترین بودند ) 05 / 0p < (. مجموع اسیدهای چرب در ماهیان سفید نر و ماده نوشهر و ماهیان نر ساری در بهار به طور چشمگیری
کمتر از بقیه موارد برآورد شد و ماهیان سفید نر و ماده نوشهر در زمستان حاوی مقادیر نسبتا بالاتری از کل اسیدهای چرب بودند. حداکثر
مقادیر DHA در هردو جنس، هر دو فصل و هر دو منطقه بیشتر از EPA برآورد گردید. درصدهای SFA در هر دو جنس و منطقه در زمستان
بالاتر از بهار بودند در حالی که PUFA در هر دو جنس و منطقه درصدهای بالاتری در بهار نسبت به زمستان داشتند. درصد کل ω-3 ها در
نمونههای زمستان نوشهر ) 12 / %41 ( بالاتر از ساری ) 91 / %30 (، و در نمونههای بهار ساری ) 27 / %55 ( بیشتر از نوشهر ) 29 / %17 ( بود. کمترین
نسبت مجموع نسبت ω-3/ω-6 در ماهیان سفید ماده ساری ) 12 / 3 ( در زمستان و نر نوشهر ) 23 / 3( در بهار بدست آمد. بیشترین نسبت
PUFA/SFA در ماهیان سفید ماده ساری ) 9 / 1 ( و ماده نوشهر ) 74 / 0( به ترتیب در بهار و زمستان برآورد گردید. ترکیبات بیوشیمیایی عضله
ماهیان نر و ماده در دو فصل و منطقه مختلف تفاوت معنیداری نداشتند ) 05 / 0p > .)
نتیجهگیری: ماهیان صید شده در زمستان اسیدهای چرب )مخصوصاً DHA و EPA ( بیشتری در عضله داشتند و بنابر این برای مصارف
انسانی دارای اهمیت بیشتری هستند. دو منطقه، دو فصل، و دو جنس مختلف بر پروفایل اسیدهای چرب ماهیان سفید دریای خزر اثرات
بارزی دارند.

کلیدواژه‌ها


عنوان مقاله [English]

Comparison of Muscle Fatty Acid Profile and Biochemical Composition in Kutum (Rutilus frisii) from the Caspian Sea in Winter and Spring in the Eastern and Western Mazandaran Province, Iran

نویسندگان [English]

  • M. Tirneitali 1
  • M.K. Khalesi 2
  • S. Kohestan Eskandari 3
1 M. Sc. Graduated in Fisheries Ecology, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
2 Associate Professor of Fisheries Department, Faculty of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
3 Academic Member of Fisheries Department, Faculty of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
چکیده [English]

Introduction: Caspian kutum (Rutilus frisii) is of great importance among consumers. The aim of this study is to investigate the changes in the fatty acid profiles of fish caught in east of Sari and west of Noshahr. Materials and Methods: The studied fish (three fish from each gender) were purchased in winter and spring from Sari Shahid Beheshti Cooperative and the Veterans Cooperative of Noshahr (east and west of Mazandaran province, respectively). Biochemical analysis and fatty acid profile were determined by the application of gas chromatography using standard methods. Results: Stearic acid, oleic acid, and DHA were the highest in Sari in winter being the significantly different from other fatty acids (p < 0.05). Total fatty acids in male and female fish from Noshahr and male fish from Sari were significantly lower in spring than in the others, and male and female fish from Nowshahr contained relatively higher total fatty acids in winter. Maximum DHA values were higher than EPA in both sexes, seasons, and regions. The chemical composition of male and female fish did not differ significantly in both seasons and regions (p > 0.05). SFA percentages in both sexes and regions were generally higher in winter than in spring, while PUFA percentages in both sexes and regions were higher in spring than in winter. The percentage of ω-3 fatty acids (41.12%) in winter samples of Noshahr was higher than that (30.91%) in Sari, and it was higher in spring samples of Sari (55.27%) than that of Noshahr (17.29%). The lowest total ratios of ω-3/ω-6 were obtained in Sari (3.12) in male fish in winter and in Noshahr (3.23) in spring. The highest PUFA/SFA ratios were observed in Sari (1.9) and Noshahr (0.74) kutum in spring and winter, respectively. Conclusion: Fish examined in winter contained more fatty acids (especially DHA and EPA) in the muscle and are therefore more important for human consumption. The two regions, two seasons, and two sexes had significant effects on body biochemical composition and fatty acid profile of Caspian Sea kutum.

کلیدواژه‌ها [English]

  • Biochemical Composition
  • Fatty Acid
  • Noshahr
  • Rutilus frisii
  • Sari
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