مقایسۀ عملکـرد و کارایی دو سیستم پرورشی خودکـار، مبتنی بر منطق فازی و متداول، در تولید ماهی پاکو قرمز (Piaractus brachypomus)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی ماشین‌های کشاورزی، دانشکدة مهندسی و فناوری کشاورزی پردیس‌کرج، دانشگاه تهران

2 گروه شیلات، دانشکدة منابع طبیعی پردیس‌کرج، دانشگاه تهران

چکیده

بیشتر مطالعات انجام‌شده در یک دهة اخیر روش‌های مختلف تولید آبزیان و شرایط زیستی ماهیان را با هدف بهینه‌سازی بررسی کرده است. تحقیقات دیگر نیز روش‌های نوین مدیریتی با هدف کاهش دخالت انسانی در سامانه‌های تولید و پرورش ماهی از نوع نیمه‌متراکم و متراکم را کندوکاو کرده‌اند. در تحقیق حاضر سازگانی پرورشی از نوع متراکم طراحی شد. به‌ منظور کاهش سطح دخالت انسان در این سازگان از حسگرهای آنالیز کیفیت آب و کنترل‌کنندة خودکار منطبق بر منطق فازی استفاده شد و با سیستم مرسوم مقایسه شد. برای این منظور درون هر یک از مخازن ونیرو با ظرفیت 1000 لیتر و از جنس فایبرگلاس، 50 قطعه ماهی پاکو قرمز (Piaractus brachypomus) با وزن اولیة 74/3±05/15 و 43/3±98/14 گرم به ترتیب در سازگان مدرن مجهز به سامانة کنترلی و سازگان مرسوم (فاقد سامانة کنترلی) قرار گرفتند و تا رسیدن به حداقل دو برابر وزن اولیه پرورش یافتند. در پایان دورة آزمایش یعنی هفتة چهارم، متوسط وزن ماهی درون سازگان مدرن به میزان 06/10±43/56 گرم (75/3 برابر وزن اولیه) و متوسط وزن ماهی درون سازگان مرسوم به میزان 38/7±13/40 گرم (68/2 برابر وزن اولیه) رسید. شاخص‌های متوسط افزایش وزن روزانه برای هر ماهی 32/1 و 65/0گرم، نرخ رشد ویژه 40/5 و 14/3 درصد و ضریب تبدیل غذایی نیز 73/0 و 21/1 به ترتیب در سازگان‌های مدرن و مرسوم به دست آمد که در مقام مقایسه میان دو بوم‌سازگان پرورشی طراحی‌شده به ‌طور معنی‌داری )05/0(P< متفاوت بود. نتایج این پژوهش نشان داد که با به‌کارگیری سامانة مدرن کنترلی می‌توان کارایی سازگان پرورشی را با تعریف دامنة مناسب برای شاخص‌های اصلی کیفیت آب افزایش داد و به بهینه‌سازی شاخص‌های رشد نیز رسید.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Comparative performance and efficiency of two automated (based on fuzzy logic) and conventional rearing system, in red Pacu (Piaractus brachypomus) production

نویسندگان [English]

  • Mahdi Saadatfard 1
  • Hojat Ahmadi 1
  • Gholamreza Rafiee 2
  • Seyed Saeed Mohtasebi 1
1 Department of Agricultural Machinery Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran
2 Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

In the last decade, several studies have evaluated possibility of aquaculture production techniques improvement and the environmental conditions of fish during a culture period. Other researches have focused on presenting new technologies for fish management in semi-intensive and intensive aquaculture production systems, reducing the human intervention in the management of rearing systems designed for fish production. The educational intensive system of the present study was designed to reduce the level of human intervention in the fish culture system. Water quality sensors and automatic fuzzy logic controller were involved to the conventional system to get new system then compared to the first system. For this purpose, 50 pieces of red Pacu (Piaractus brachypomus) with mean initial weights of 15.05±3.47 and 14.89±3.43g, introduced to systems A & B rearing tanks, respectively to get twice initial weight after rearing. At the end of the fourth week, the average weight of the fish within the modern system at the A tank attained 56.43±10.06 g (3.75 times the initial weight) and the average fish weight within the conventional system at the B tank reached as much as 40.13±7.38 g (2.68 times the initial weight), indicating average daily weight gain Indices of 1.32 and 0.65 grams per fish, specific growth rates of 5.40 and 3.16 percent and feed conversion rate 0.73 and 1.21 respectively, were obtained in both modern and conventional systems in comparison between the two ecosystems were significantly was different (P<0.05). The environmental variables were kept within acceptable ranges for pacu production. It was concluded that it is possible to increase the productivity and profitability of the aquaculture system, using new approaches based on modern control techniques, such as fuzzy logic control, that promote water resource optimization.

کلیدواژه‌ها [English]

  • fuzzy logic control
  • intensive aquaculture systems
  • growth factors and survival
  • red pacu

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