This study compared the growth performance of Pacific white shrimp (Litopenaeus vannamei) reared in clear water recirculating aquaculture systems (CW) versus biofloc technology systems (BF). Shrimp were stocked at 250 shrimp/m3 in six 1.36 m3 tanks (3 tanks for each system type) and reared for 55 days. Shrimp in the CW systems had a significantly higher mean harvest weight and lower feed conversion ratio compared to those in the BF systems. Water quality parameters such as ammonia, nitrite, nitrate and turbidity were also more stable in the CW systems. Overall, the CW systems outperformed the BF systems in this study based on shrimp
The early mortality syndrome (EMS) in shrimp has been ravaging production systems, spreading vertically in Asia and horizontally to countries as far away as Mexico since first reported in 2009.
FISH FARMING TECHNOLOGY: The use of feed in recirculating aquaculture systems...International Aquafeed
One of the greatest operating costs in aquaculture is the use of commercial feed pellets, which can comprise of up to 50-60 percent of total expense in some farms.
The early mortality syndrome (EMS) in shrimp has been ravaging production systems, spreading vertically in Asia and horizontally to countries as far away as Mexico since first reported in 2009.
FISH FARMING TECHNOLOGY: The use of feed in recirculating aquaculture systems...International Aquafeed
One of the greatest operating costs in aquaculture is the use of commercial feed pellets, which can comprise of up to 50-60 percent of total expense in some farms.
Biofloc fish farming for sustainable aquacultureOrganicaBiotech1
Biofloc technology is an emerging, eco-friendly and cost-effective approach for sustainable fish farming. Earlier, the biofloc system was used as the means to treat wastewater and control fish production.
Fish farming traditionally has many drawbacks. But it evolved after the ages to produce huge number of fishes in lesser space with Biofloc technology which has a competitive advantage over the traditional technique.
Current food needs in the world are growing due to population boom and the popularity of fish is drastically improved due to it, whereas the supply of fish becoming stagnant due to pollution, plastic and many factors, etc. To tackle this needs scientists have developed a technique to produce it commercially with less space, in lesser time with a less inorganic food requirement.
Biofloc fish farming for sustainable aquacultureOrganicaBiotech1
Biofloc technology is an emerging, eco-friendly and cost-effective approach for sustainable fish farming. Earlier, the biofloc system was used as the means to treat wastewater and control fish production.
Fish farming traditionally has many drawbacks. But it evolved after the ages to produce huge number of fishes in lesser space with Biofloc technology which has a competitive advantage over the traditional technique.
Current food needs in the world are growing due to population boom and the popularity of fish is drastically improved due to it, whereas the supply of fish becoming stagnant due to pollution, plastic and many factors, etc. To tackle this needs scientists have developed a technique to produce it commercially with less space, in lesser time with a less inorganic food requirement.
تربية أسماك البلطي
الباب الأول : أسماك البلطي :
- أنواع أسماك البلطي :
النيلي .
الحساني .
الأخضر .
الجليلي .
الموزمبيقي .
الباب الثاني : أسس إنشاء المزارع السمكية :
- الأسس التى تبني عليها دراسة جدوى المشروع .
- أسس اختيار المزرعة السمكية :
اختيار الموقع .
جغرافية الموقع .
طبيعة التربة .
المورد المائى .
- أنواع أحواض الأسماك :
أحواض الأراضي المستوية .
أحواض السدود والحواجز الصناعية .
- مراحل الإنشاء .
- تقسيم المزرعة ومواصفاتها .
عدد الأحواض .
حجم الأحواض .
عمق الأحواض .
شكل الأحواض .
ميول الجسر .
معالجة التربة .
- تقسيم أحواض المزرعة السمكية :
أحواض الأمهات .
أحواض الأقلمة .
أحواض التهجين .
أحواض التحضين .
أحواض التربية :
احتياجات أحواض التربية
أحواض التسمين .
أحواض البيع .
- أنظمة الاستزراع السمكي :
النظام الغير مكثف .
النظام شبه المكثف .
النظام المكثف .
استزراع البلطي فى الأقفاص العائمة .
الاستزراع السمكي المتكامل .
زراعة الأسماك مع مزارع البط .
زراعة الأسماك فى حقول الأرز .
- أعمال تحضيرية تتم فى أحواض الحضانة والتربية :
تنظيف الأحواض .
ضبط عمق المياة .
تسميد الأحواض .
- الأعمال المتبعة فى إدارة الأحواض :
فحص الأحواض .
تنظيف المصافي والمرشحات .
مراقبة سلوك الأسماك .
الباب الثالث : مفاهيم مهمة فى تربية أسماك البلطي :
- مفاهيم الاستزراع السمكي .
- مفاهيم هامة فى التربية .
- مفاهيم فى تخزين الزريعة .
- مفاهيم فى معدلات التخزين فى الأحواض .
- مفاهيم فى الطاقة التحميلية ( السعة التحميلية ) .
- مفاهيم فى نوعية طرق الاستزراع :
الاستزراع المتعدد : إيجابيات - سلبيات
الاستزراع الفردي .
- مفاهيم فى تجهيز أحواض الاستزراع :
تجفيف الحوض .
تطهير الحوض .
التسميد الابتدائي للحوض .
نقل الزريعة .
- المشكلات الأساسية فى حوض التربية :
نقص كمية الأكسجين .
زيادة درجة حرارة الماء ( التغير فى درجة الحرارة ) .
الحموضة الزائدة والقلو
High-density production of the Pacific White Shrimp, Litopenaeus vannamei, in...ssuserc18183
High-density production of the Pacific White Shrimp, Litopenaeus vannamei, in recycled culture water under zero-exchange conditions using settling tanks, foam fractionators and dissolved oxygen monitoring systems as management tools
Effect of Intensifying Stocking Densities and Proper Feed Management Techniqu...IJERA Editor
Clarias gariepinus was cultured in earthen ponds at three very high stocking densities- 27, 45, and 90 fingerlings/m2 in replicates and fed with both commercial (CF) and formulated feed (FF). After eight weeks, fish fed CF had the highest mean daily weight gain of 0.591±0.004g/day; 0.491±0.004g/day; 0.576±0.001g/day respectively for 27, 45 and 90 fingerlings/m2 with a corresponding MDWG of 0.576±0.001; 0.608±0.005 and 0.607±0.012g/day with FF. The weight and Condition Factor (g)(C.F.) for CF fed were 32.71g (0.93); 31.66g (0.68) and 32.0g (0.85) respectively for 27, 45 and 90 fingerlings/m2 , while FF correspondingly yielded 34.43g (0.80); 35.33g (0.47) and 35.33g (0.90). The survival rate was highest with CF at 27 fingerlings/m2 and lowest with FF at 90 fingerlings/m2 . Consequently, a stocking density of 45 fingerlings/m2 is recommended for earthen pond culture with either CF or FF. Feeding specificity, timeliness in feeding cum high quality feed enhanced fish growth and development.
Cultivation of an Aquaponic Culture with Qualitative Estimates of Growth and ...Augustine Jaeger
ABSTRACT. An aquaponic system has the essential characteristics to become a popular trend. The research in hydroponics and aquaculture are extensive.5, 8 The combination offers niche market goods which can be highly advantageous to an agricultural setting. Water safety is a concern in the process of aquaponics and EPA standards allow 240CFU/100mL (Colony Forming Units) in an open water source such as the rearing tank of the aquaculture.9 An examination of water using methods based on EPA tests was performed for the Total Coliform. The MPN (Mean Probable Number) of CFU was determined to be lower than EPA standards for winter 2014. Growth measured in the hydroponic component gave expected seasonal results.
Comparative Study of Zootechnical Performances and Survival Rates in Rainbow ...IJEAB
Considering its economic and halieutic interest, the rainbow trout (Oncorhynchus mykiss, Walbaum, on 1792) is one of the species the most appreciated in the world, in particular for the sports fishing. To compare the effects of two food of different formulation, (the one premises(place) used by the center of salmon farming and the other one imported) on some biological parameters of the trout rainbow, an experimental study was realized between 1st Mars and June 15th, 2016 in the National Center of Hydrobiology and Fish farming of Azrou on 2000 fish fry stemming from the same prize of eggs and restarted randomly in 4 rectangular ponds fed with fresh water and fed four times by days during 107 days. The obtained results show good that the best performances of growth in length and in weight, the survival rate and feed efficiency are attributed to the imported food.
Similar to WAS 2016 Abstract, Thomas Drury and Andrew Ray (20)
Comparative Study of Zootechnical Performances and Survival Rates in Rainbow ...
WAS 2016 Abstract, Thomas Drury and Andrew Ray
1. SHRIMP Litopenaeus vannamei PRODUCTION IN CLEAR WATER AND BIOFLOC
SYSTEMS
Thomas H. Drury*, Andrew J. Ray
Aquaculture Research Center
Kentucky State University
Frankfort KY 40601
Thd6@miami.edu
Shrimp is one of the top seafood products consumed in the world. Many metropolitan markets
have difficulty attaining affordable fresh shrimp. This study aims to help pinpoint technology
that will increase the viability of indoor commercial shrimp production in areas where the market
supply of fresh shrimp is limited or seasonal.
This project focused on the culture of Pacific white shrimp Litopenaeus vannamei, specifically
shrimp performance within two types of production systems: clear water RAS (CW) and biofloc
technology systems (BF). These two approaches were examined due to their congruent
characteristics enabling the production of high densities of shrimp within indoor biologically
secure and minimal-exchange systems.
Marine shrimp weighing a mean of 0.42g were stocked in six 1.36 m3
fiberglass tanks within a
climate-controlled greenhouse. The stocking density was 250 shrimp/m3
(340 shrimp per tank).
There were three randomly assigned replicate tanks for each system type: 3 BF and 3 CW.
System performance was interpreted by calculating shrimp production and water quality metrics;
shrimp were harvested after 55 days of growth.
Production Metric BF CW
Mean Harvest Weight (g) 11.05 ± 0.2a
11.60 ± 0.4b
Mean FCR 1.76 ± 0.1a
1.47 ± 0.1b
Mean Survival (%) 69.0 ± .6 78.0 ± 4.4
Parameter BF CW
Total Ammonia-Nitrogen (mg/L) 0.1 ± 0.1 0.2 ± 0.1
Nitrite (mg/L) 2.2 ± 0.4 0.9 ± 0.4
Nitrate (mg/L) 39.3 ± 10.3 20.5 ± 4.3
Turbidity (ntu) 87.2 ± 23.0 6.2 ± 1.1
*Data are presented as mean ± SE
Shrimp mean harvest weight and FCR were significantly better in the CW treatment
versus the BF treatment (P < 0.05). Additionally, results suggest that CW external
filters were more effective as they created more stability in water quality parameters.
2. Generally, the clear water systems outperformed biofloc systems by most indications of
this study.
