پاسخ‌های انرژی زیستی (‏SFG‏) صدف لب‌سیاه (‏Pinctada margaritifera‏)‏ به شرایط دمایی متفاوت در خلیج چابهار، دریای عمان

نوع مقاله : مقاله کامل علمی - پژوهشی

نویسندگان

1 نویسنده مسئول، دانشجوی دکتری زیست‌شناسی دریا، دانشکده علوم دریایی، دانشگاه علوم دریایی خرمشهر، خرمشهر، ایران

2 استاد گروه زیست‌شناسی دریا، دانشکده علوم دریایی و اقیانوسی، دانشگاه علوم و فنون دریایی خرمشهر، خرمشهر، ایران.

چکیده

صدف لب‌سیاه ‏‎(Linnaeus, 1758)‎‏ ‏Pinctada margaritifera‏ با ارزش غذایی بالا در مطالعه ویژگیهای رشد مورد ‏توجه قرار گرفته است. فاکتور دما با تاثیر بر عملکردهای فیزیولوژیک مانند میزان تنفس، فیلتراسیون و دفع و بازده جذب نقش ‏کلیدی در متابولیسم و بالانس انرژی ایفا می‌نماید. ‏SFG‏ (توان رشد) یک شاخص فیزیولوژیک می‌باشد که انعکاس‌دهنده ‏وضعیت سلامت و توانایی پاسخهای سازشی افراد به تغییرات کیفی محیط‌های طبیعی به‌ویژه دما و غذا است. زمانی‌که این ‏بالانس مثبت باشد؛ ارگانیسم ماده یا انرژی در دسترس را برای رشد، بیوماس و تولیدمثل دارد. این مطالعه در دوره‌های اقلیمی ‏پیش‌مانسون، فصل مانسون زمستانه و پس‌مانسون در خلیج چابهار، دریای عمان تحت شرایط آزمایشگاهی انجام شد. در این ‏آزمایش، مقادیر شاخص ‏SFG‏ در دامنه دمایی از 21 تا 28 درجه سانتیگراد، مثبت بود و در دوره پس‌مانسون به‌طور معنی‌داری ‏بالاتر نسبت به دوره پیش‌مانسون مشاهده شد. نتایج تشان داد که صدف ‏Pinctada margaritifera‏ رشد بهتری را در ‏شرایط استرس کمتر بعد از مونسون زمستانه داشته است که با افزایش شاخص ‏SFG‏ آشکار می‌شود. همچنین مدل ‏STELLA‏ ‏نشان می‌دهد که خلیج چابهار، زیستگاه مطلوبی برای پرورش صدف لب‌سیاه است.‏

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Bioenergetic responses‏ ‏‎(SFG) of Black-lip oyster (Pinctada margaritifera) to ‎different temperature conditions in the Chabahar Bay, Oman sea

نویسندگان [English]

  • Parham Farsi 1
  • Babak Doustshenas 2
  • Rahim Abdi 2
1 Corresponding Author, Ph.D. Student of Marine Biology, Faculty of Marine Sciences, Khorramshahr University of Marine Sciences, Khorramshahr, Iran.
2 Professor, Dept. of Marine Biology, Faculty of Marine and Ocean Sciences, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran
چکیده [English]

Black-lip oyster, Pinctada margaritifera (Linnaeus, 1758) with high nutritional value has ‎been considered in the study of growth characteristics‏.‏‎ Temperature factor by‏ ‏effect on the ‎physiological functions such as the rates of respiration, clearance‏ ‏and excretion and absorption ‎efficiency play key role in the metabolism and energy balance. SFG (scope for growth) is a ‎physiological index; which reflects health status and the ability of adaptive responses of ‎individuals to natural environments quality changes, particularly temperature and food. When ‎this balance is positive, the organism has matter or energy available for growth, biomass and ‎reproduction.‎‏ ‏This study was conducted at the pre-monsoon, winter monsoon season and post-‎monsoon climatological periods in Chabahar Bay, Oman sea under laboratory conditions. In this ‎experiment, SFG values was positive at temperatures ranging from 21°C‎‏ ‏to 28°C did observed‏ ‏at ‎the post-monsoon significantly higher relative to the pre-monsoon. The results showed that ‎Pinctada margaritifera grew better in less stress conditions after winter monsoon; that is ‎manifest as an increase in SFG index. The STELLA model also shows that Chabahar Bay is a ‎favorable habitat for Black-lip oyster farming.‎

کلیدواژه‌ها [English]

  • Scope for Growth index
  • Black-lip oyster
  • Temperature
  • Chabahar Bay
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