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

Zaki, Mohamed A.; Alabssawy, Ahmed N.; Nour, A. M.; Basuini, Mohammed F. El; Dawood, Mahmoud A.O.; Alkahtani, Saad; Abdel-Daim, Mohamed M.

doi:10.1016/j.aqrep.2020.100282

Cited by 92 publications

(64 citation statements)

References 50 publications

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“…In this study, it was observed that higher stocking density had a lower DO level. This observation is congruent with the findings of Mahfouz et al (2015) and Zaki et al (2020). The mean values of the DO obtained from this study were within the recommended range by Eding et al (2009), which is between 4.0 mg L -1 and 6.0 mg L -1 .…”

Section: Discussionsupporting

confidence: 93%

Effects of Fish Stocking Density on Water Quality, Growth Performance of Tilapia (Oreochromis niloticus) and Yield of Butterhead Lettuce (Lactuca sativa) Grown in Decoupled Recirculation Aquaponic Systems

et al. 2021

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This study was conducted over a period of 52 days to determine the effects of fish stocking density on the water quality, growth performance of tilapia and yield of butterhead lettuce cultivated in decoupled recirculation aquaponic systems (DRAPS). In this study, three respective tilapia stocking densities (treatments) of 8 kg•m-3 , 10 kg•m-3 , and 12 kg•m-3 were used to evaluate the butterhead lettuce in the DRAPS, which consist of two independent loops. All treatments were done in triplicates. The results showed with increased stocking density, the electrical conductivity, total dissolved substances and salinity increased and dissolved oxygen decline. The results showed that the highest stocking density produced the highest nutrients accumulation of ammonia-nitrogen (NH 3-N), ammonium (NH 4), nitrite-nitrogen (NO 2-N) and nitrate-nitrogen (NO 3-N) and potassium (K) except for phosphorus (P). Nevertheless, based on the conversion of fish feed to NO 3-N and P per kilogram of feeds, the lowest stocking density provided the highest concentration of NO 3-N and P. It was documented that DRAPS relied solely on the fish waste produced an insufficient concentration of N, P, K and iron. The average survival rate of tilapia in all treatments was above 94% and was not a significant difference among the treatments.

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Section: Discussionsupporting

confidence: 93%

Effects of Fish Stocking Density on Water Quality, Growth Performance of Tilapia (Oreochromis niloticus) and Yield of Butterhead Lettuce (Lactuca sativa) Grown in Decoupled Recirculation Aquaponic Systems

et al. 2021

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“…Similar values of oxygen dissolved were reported by Correa et al (2020) in the rearing of Nile tilapia juveniles in a biofloc system employing periods of feed deprivation. Zaki et al (2020) also reported significantly higher (p<0.05) dissolved oxygen values in a biofloc system of Nile tilapia at the lower stocking density.…”

Section: Discussionmentioning

confidence: 81%

Nile Tilapia Nursery in a Biofloc System: Evaluation of Different Stocking Densities

et al. 2020

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This trial aimed to evaluate the growth performance and hematological parameters of Nile tilapia (Oreochromis niloticus) GIFT strain during nursery using different stock densities in a biofloc system. The experiment was conducted in circular tanks (400 L) with sexually reversed fish, weighing 6.74 ± 0.37 g, over a period of 35 days. Five treatments with three replicates each were used in a completely randomized design. The treatments were as follows: T1 (200 fishes m-3); T2 (300 fishes m-3); T3 (400 fishes m-3); T4 (500 fishes m-3), and T5 (600 fishes m-3). The fishes were fed four times a day, following a feed table for this species, with adjustments according to fish biomass. The water quality parameters total ammoniacal nitrogen, and unionized ammonia showed a significant difference (p<0.05) between the treatments with lower (T1) and higher stocking densities (T4, T5). Alkalinity was significantly higher in treatments with higher densities (T4 and T5). For hematological parameters, the number of thrombocytes was higher in T5. Hemoglobin concentration was significantly lower in T5 than in T3. The best productive indexes were found in T4, presenting final biomass of 9915.16 ± 14.80 g m-3 , apparent feed conversion rate of 1.11 ± 0.02, mean survival of 95.75 ± 0.75%, and daily mean weight gain of 0.43 ± 0.07 g. Overall, the Nile tilapia nursery in a biofloc system showed higher individual growth at densities up to 300 fishes m-3 and increased stocking density up to 500 fishes m-3 .

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“…The number of populations increases day by day, and the demand for aquatic animals also increases. However, due to the limitations of water sources, the intensive aquaculture systems are practiced (Zaki et al, 2020). Fish reared at intensive and semi‐intensive culture systems have been exposed to several physical and chemical stressors such as overfeeding, handling, over‐fertilization, capture, transportation, heat stress and high stocking densities.…”

Section: The Role Of Lycopene In Reducing the Impacts Of Various Aquamentioning

confidence: 99%

Lycopene reduces the impacts of aquatic environmental pollutants and physical stressors in fish

Dawood

Abdel‐Tawwab

Abdel‐Latif

2020

Reviews in Aquaculture

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Aquatic organisms are susceptible throughout their lives to chemical and physical stressors, which negatively affect their health. Various aquatic pollutants derived from industrial effluents, overuse of some agricultural pesticides, herbicides and insecticides may cause devastating toxicological aspects of aquatic organisms and deteriorate their health and growth. They also led to oxidative stress to fish due to the stimulation of the production of reactive oxygen species. Therefore, the need for using natural antioxidants to be used as feed additives is of great importance to counteract the hazardous oxidative stress responses. The use of phytochemicals, which characterized by substantial antioxidative effects, has been raised. Lycopene is the principal carotenoid pigment found in tomatoes and their products, vegetables and red fruits. Numerous studies have recommended the use of lycopene as a powerful antioxidant to attenuate the oxidative stress responses in several fish species exposed to various toxicants or any other stress conditions. Lycopene maintains the health condition of fish by enhancing the immune and antioxidative responses. This review article aimed to elucidate the current information about the potential use of dietary lycopene for several fish species and its capability to attenuate the oxidative stress and haemato‐immunological alterations resulted from aquatic environmental pollutants and other physical stressors. Additionally, the review discusses some aspects regarding the lycopene mode of action to assess the profits that would be of importance in the aquaculture industry.

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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

Cited by 92 publications

References 50 publications

Effects of Fish Stocking Density on Water Quality, Growth Performance of Tilapia (Oreochromis niloticus) and Yield of Butterhead Lettuce (Lactuca sativa) Grown in Decoupled Recirculation Aquaponic Systems

Effects of Fish Stocking Density on Water Quality, Growth Performance of Tilapia (Oreochromis niloticus) and Yield of Butterhead Lettuce (Lactuca sativa) Grown in Decoupled Recirculation Aquaponic Systems

Nile Tilapia Nursery in a Biofloc System: Evaluation of Different Stocking Densities

Lycopene reduces the impacts of aquatic environmental pollutants and physical stressors in fish

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