ارزیابی اقتصادی و تولید میگوی سفید غربی (1931,Penaeus vannamei Boone) در سیستم های آبزی پروری معمولی و توده ساز زیستی

نوع مقاله : تغذیه

نویسندگان

1 گروه علوم و مهندسی شیلات، دانشکده منابع طبیعی، دانشگاه جیرفت، جیرفت، ایران

2 گروه شیلات، دانشکده منابع طبیعی، دانشگاه گیلان، صومعه سرا، ایران

3 مرکز تحقیقات ملی آبزیان آب های شور، موسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، بافق، ایران

4 گروه شیلات، دانشکده علوم و فنون دریایی و جوی، دانشگاه هرمزگان، بندرعباس، ایران

چکیده

در مطالعه حاضر عملکرد اقتصادی و تولید میگوی سفید غربی در سیستم ­های آبزی ­پروری سنتی و توده ­ساز زیستی مورد ارزیابی قرار گرفت. میگوی سفید غربی در مرحله جوانی با وزن 0/33± 2/56 گرم (میانگین ± انحراف از معیار) به­ مدت 5 هفته در ظروف فایبرگلاس با حجم آبگیری 180 لیتر و با تراکم یک گرم بیومس در لیتر در چهار تیمار شامل یک تیمار تعویض آب (100% غذادهی کنسانتره) و سه تیمار توده ­ساز به ترتیب با 100، 66/6 و 33/3% غذای کنسانتره (بدون تعویض آب) تغذیه شدند. براساس نتایج به ­دست آمده، تفاوت معنی­ داری در مقادیر پارامترهای شاخص ­های کیفی آب (0/05>P) و هم ­چنین بین عملکرد تولید و اقتصادی میگوی سفید غربی در دو سیستم وجود داشت (0/05>P). بیش ­ترین میزان افزایش وزن بدن، سرعت رشد (0/136 گرم در روز)، ضریب رشد ویژه (3 درصد در روز)، ضریب بقاء (90/48 درصد) و بازده غذایی در تیمار­های توده­ ساز به­ دست آمد (0/05>P). بیش ­ترین سودآوری در سیستم­ های توده ­ساز مشاهده شدکه با سیستم معمولی اختلاف معنی ­داری نشان داد (0/05>P). نتایج تحقیق بیانگر این است که با سیستم توده­ ساز زیستی می­ توان عملکرد تولید میگوی سفید غربی را در مرحله جوانی افزایش داد و حضور توده­ های زیستی سبب بهبود عملکرد اقتصادی میگوی سفید غربی در سیستم بدون تعویض آب می­ شود.

کلیدواژه‌ها

عنوان مقاله [English]

Economic and Production evaluation of Pacific white shrimp (Penaeus vannamei Boone, 1931) in conventional and biofloc aquaculture systems

نویسندگان [English]

  • Mohammad Hossein Khanjani 1
  • Mirmasoud Sajjadi 2
  • morteza alizadeah 3
  • Iman Sourinejad 4
1 Department of Fisheries Science and Engineering, Faculty of Natural Resources, University of Jiroft, Jiroft, Iran
2 Department of Fishery, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran
3 Salty water aquatic research center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Bafgh,Iran
4 Fisheries Department, Faculty of Marine Science and Technology, Hormozgan University, Bandar Abbas, Iran
چکیده [English]

In the current study, economic performance and production of Pacific white shrimp (Penaeus vannamei) were studied in conventional and biofloc aquaculture systems. Shrimp juveniles with a weight of 2.56±0.33 g (M ± SD) were fed for 5 weeks in fiberglass tanks with 180 liters volume and density of 1gr shrimp per liter in four treatments including one control group with water exchange (100% artificial feed) and three biofloc treatments, 100%, 66.6% and 33.3% artificial feed (without water exchange). According to the results, considering the values of water quality parameters and production and economic performances of Penaeus vannamei, there were significant differences between two systems (P <0.05). The highest increase in body weight, growth rate (0.136 g per day), specific growth rate (3 %/day), survival rate (90.48%) and feed efficiency were obtained in biofloc treatments (P<0.05). The maximum level of profitability obtained in biofloc systems, that showed significant difference compared with conventional system (P<0.05). Results of this study highlights the production and economic performance of Penaeus vannamei in juvenile stage could be improved with biofloc system; and the presence of biofloc improves economic performance of Penaeus vannamei in zero water exchange system.

کلیدواژه‌ها [English]

  • Aquaculture
  • biofloc system
  • Pacific white shrimp

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فصلنامه محیط زیست جانوری
دوره 12، شماره 2
تیر 1399
صفحه 347-354

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