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:: Volume 28, Issue 4 (11-2019) ::
isfj 2019, 28(4): 69-78 Back to browse issues page
Effects of different salinity levels and carbon sources in biofloc production system
Mohammad hossein Khanjani *
Fisheries Department, Faculty of Natural Resources, University of Jiroft, Jiroft, Iran
Abstract:   (2702 Views)
Carbonaceous organic matter and water salinity are the key factors in zero water exchange system with biofloc production. In the present study, production of biofloc in different water salinities and carbon sources was investigated in zero water exchange system. For this purpose, three levels of salinity (10, 21 and 32 ppt) and two types of carbon source (molasses and wheat flour) were considered in zero water exchange system. The experiment was conducted in tanks with water volume of 300L for 4 weeks in propagation and cultivation aquatics center located in Bandar Kolahi, Minab, Hormozgan province. Minimum dissolved oxygen (5.68 mg/l) and NH3 (0.29 mg/l) and maximum NO3 (12.68 mg/l) obtained in the tanks with molasses, as carbon source, and 32ppt water salinity. Some of water phsicochemical parameters including dissolved oxygen, pH, NH3 and NO3 were measured regularly and significant differences were observed among the different treatments (p<0.05). The analysis of the biochemical composition of the bioflocs showed a decrease in protein and an increase in ash content along with increase in water salinity. Lipid content in molass biofloc was significantly lower than the wheat flour biofloc (p<0.05). The results showed that type of carbon source and value of salinity would be effective on water quality parameters and nutrition value of bioflocs in zero water exchange system.
Keywords: Biofloc, Carbon sources, Salinity, Zero water exchange system
Full-Text [PDF 433 kb]   (717 Downloads)    
Type of Study: Research | Subject: تكثير و پرورش
Received: 2019/04/11 | Accepted: 2019/07/27 | Published: 2019/09/8
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khanjani M H. Effects of different salinity levels and carbon sources in biofloc production system. isfj 2019; 28 (4) :69-78
URL: http://isfj.ir/article-1-2217-en.html


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Volume 28, Issue 4 (11-2019) Back to browse issues page

با کسب مجوز از دفتر کمیسیون بررسی نشریات علمی وزارت علوم، تحقیات و فنآوری مجله علمی شیلات بصورت آنلاین می باشد و تعداد محدودی هم به چاپ می رساند. شماره شاپای جدید آن ISSN:2322-5998 است

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