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Feeding Western white shrimp (Penaeus vannamei Boone, 1931) with bioflocs biomass and its effects on water quality and growth performance
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Mohammad hossein Khanjani *   , Mir Masoud Sajjadi2 , Morteza Alizadeh3 |
university of jiroft, University of Jiroft, Faculty of Natural Resources, Fisheries Department, Jiroft, Kerman, Iran , m.h.khanjani@gmail.com
2- Faculty of Natural Resources, Fisheries Department
3- 3. Saline Water Aquatic National Research Cen*ter |
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Abstract: (1978 Views) |
The effect of feeding Western white shrimp Penaeus vannamei Boone, 1931 (in three stage postlarvae, nursery and juvenile) with bioflocs biomass on water quality and growth performance were investigated in the present work. Western white shrimps were fed (with wet biofloc) for three weeks in fiberglass containers with 180 liters volume of water and density of 10 post larvae per liter (postlarvae), 1 individual per liter (nursery) and 1 gr biomass per liter (juvenile) in three biofloc treatments at different feeding levels of 25, 15 and 6% of body weight. The results obtained in this study allowed, Water quality parameters including temperature, salinity, dissolved oxygen and pH, no significant differences were observed among the biofloc treatments (P>0.05). Maximum dissolved oxygen (6.34 ± 0.31) and maximum pH (8.33 ± 0.05 mg/lit) was in biofloc postlarvae treatment. Maximum and minimum level of ammonia was 0.34± 0.21 and 0.1± 0.08 mg/lit in biofloc juvenile and postlarvae treatments, respectively and showed significant difference between treatments (P<0.05). The maximum growth rate (50± 10 mg per day), specific growth rate (10.92± 1.37 %/day) and survival rate (%96.29± 0.76) were observed in biofloc treatments, respectively (juvenile, postlarvae and nursery). Also, the highest feed conversion ratio (4.11±1.08) and the lowest feed efficiency (%24.28±6.38) were obtained in juvenile biofloc treatment. The results showed that the presence of biofloc improved water quality. Western white shrimp grown with feeding of bioflocs biomass but no sufficient food source (only biofloc) for growth and production.
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| Keywords: Western white shrimp, feeding, biofloc, water quality, growth performance |
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Full-Text [PDF 569 kb]
(711 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2019/03/27 | Accepted: 2019/07/11 | Published: 2019/12/22
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