The impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of Nile tilapia (Oreochromis niloticus) reared under biofloc conditions
The present study investigated the impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of Nile tilapia (Oreochromis niloticus) reared under biofloc conditions. Six groups were established at three levels of stocking densities [20, 40 and 60 fish (...
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doaj-153f849ae88d4c6b8a4c8c60a53db99b2020-11-25T02:04:19ZengElsevierAquaculture Reports2352-51342020-03-0116The impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of Nile tilapia (Oreochromis niloticus) reared under biofloc conditionsMohamed A.A. Zaki0Ahmed N. Alabssawy1Abd El-Aziz M. Nour2Mohammed F. El Basuini3Mahmoud A.O. Dawood4Saad Alkahtani5Mohamed M. Abdel-Daim6Department of Animal and Fish Production, Faculty of Agriculture, Alexandria University, EgyptDepartment of Zoology, Faculty of Science, Al-Azhar University, Nasr City, Cairo, EgyptDepartment of Animal and Fish Production, Faculty of Agriculture, Alexandria University, EgyptDepartment of Animal Production, Faculty of Agriculture, Tanta University, 31527, Tanta, Egypt; Education and Research Center for Marine Resources and Environment, Faculty of Fisheries, Kagoshima University, JapanDepartment of Animal Production, Faculty of Agriculture, Kafrelsheikh University, 33516, Kafrelsheikh, Egypt; Corresponding author.Department of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi ArabiaDepartment of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia; Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, 41522, EgyptThe present study investigated the impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of Nile tilapia (Oreochromis niloticus) reared under biofloc conditions. Six groups were established at three levels of stocking densities [20, 40 and 60 fish (50.47 ± 0.05 g) per m3] and fed the basal diet without carbon sources or with broken rice flour (BRF) or broken wheat grain flour (BWGF) in biofloc units. Water quality [pH, biological oxygen demand (BOD), Total ammonia-nitrogen (TAN), and nitrite-nitrogen (NO2)] values were increased significantly (P < 0.05) as the density increased and recorded the highest values in group (60 fish per m3) while dissolved oxygen decreased. Biofloc volume and bacterial counts were significantly (P < 0.05) lower in 20 fish m−3 and the highest values were in 40 fish per m3. Significantly increased growth and feed utilization were recorded in 40 fish per m3 fed with BRF. The lipid content lowered significantly (P < 0.05) in 60 fish m-3 group. Red blood cells count, hemoglobin and hematocrit values were reduced in fish stocked in high density while alanine transaminase (ALT) and aspartate transaminase (AST) increased in fish reared in low density. Glucose, cortisol, catalase and superoxide dismutase increased in fish reared at 20 fish m-3 and fed the basal diet. Thus, using of BRF for fish reared at 40 fish per m3 promotes growth and health status of Nile tilapia cultured in a biofloc system. Keywords: Biofloc, Carbon source, Growth performance, Stress markers, Nile tilapia, Stocking densityhttp://www.sciencedirect.com/science/article/pii/S2352513419304739 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mohamed A.A. Zaki Ahmed N. Alabssawy Abd El-Aziz M. Nour Mohammed F. El Basuini Mahmoud A.O. Dawood Saad Alkahtani Mohamed M. Abdel-Daim |
spellingShingle |
Mohamed A.A. Zaki Ahmed N. Alabssawy Abd El-Aziz M. Nour Mohammed F. El Basuini Mahmoud A.O. Dawood Saad Alkahtani Mohamed M. Abdel-Daim The impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of Nile tilapia (Oreochromis niloticus) reared under biofloc conditions Aquaculture Reports |
author_facet |
Mohamed A.A. Zaki Ahmed N. Alabssawy Abd El-Aziz M. Nour Mohammed F. El Basuini Mahmoud A.O. Dawood Saad Alkahtani Mohamed M. Abdel-Daim |
author_sort |
Mohamed A.A. Zaki |
title |
The impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of Nile tilapia (Oreochromis niloticus) reared under biofloc conditions |
title_short |
The impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of Nile tilapia (Oreochromis niloticus) reared under biofloc conditions |
title_full |
The impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of Nile tilapia (Oreochromis niloticus) reared under biofloc conditions |
title_fullStr |
The impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of Nile tilapia (Oreochromis niloticus) reared under biofloc conditions |
title_full_unstemmed |
The impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of Nile tilapia (Oreochromis niloticus) reared under biofloc conditions |
title_sort |
impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of nile tilapia (oreochromis niloticus) reared under biofloc conditions |
publisher |
Elsevier |
series |
Aquaculture Reports |
issn |
2352-5134 |
publishDate |
2020-03-01 |
description |
The present study investigated the impact of stocking density and dietary carbon sources on the growth, oxidative status and stress markers of Nile tilapia (Oreochromis niloticus) reared under biofloc conditions. Six groups were established at three levels of stocking densities [20, 40 and 60 fish (50.47 ± 0.05 g) per m3] and fed the basal diet without carbon sources or with broken rice flour (BRF) or broken wheat grain flour (BWGF) in biofloc units. Water quality [pH, biological oxygen demand (BOD), Total ammonia-nitrogen (TAN), and nitrite-nitrogen (NO2)] values were increased significantly (P < 0.05) as the density increased and recorded the highest values in group (60 fish per m3) while dissolved oxygen decreased. Biofloc volume and bacterial counts were significantly (P < 0.05) lower in 20 fish m−3 and the highest values were in 40 fish per m3. Significantly increased growth and feed utilization were recorded in 40 fish per m3 fed with BRF. The lipid content lowered significantly (P < 0.05) in 60 fish m-3 group. Red blood cells count, hemoglobin and hematocrit values were reduced in fish stocked in high density while alanine transaminase (ALT) and aspartate transaminase (AST) increased in fish reared in low density. Glucose, cortisol, catalase and superoxide dismutase increased in fish reared at 20 fish m-3 and fed the basal diet. Thus, using of BRF for fish reared at 40 fish per m3 promotes growth and health status of Nile tilapia cultured in a biofloc system. Keywords: Biofloc, Carbon source, Growth performance, Stress markers, Nile tilapia, Stocking density |
url |
http://www.sciencedirect.com/science/article/pii/S2352513419304739 |
work_keys_str_mv |
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