&lt;b&gt;Reassessment of the suitable range of water pH for culture of Nile tilapia &lt;i&gt;Oreochromis niloticus&lt;/i&gt; L. in eutrophic water

Rebouças, Vanessa Tomaz; Lima, Francisco Roberto dos Santos; Cavalcante, Davi de Holanda; Sá, Marcelo Vinı́cius do Carmo e

doi:10.4025/actascianimsci.v38i4.32051

Cited by 21 publications

(9 citation statements)

References 15 publications

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“…The pH during the study period ranged from 7.27 to 8.18. However, the pH of all the treatments was found to be in the optimum range for tilapia rearing (5.5–9.0) as reported by Rebouças et al (2016).…”

Section: Discussionsupporting

confidence: 76%

Effect of salinity on growth of Nile tilapia ( Oreochromis niloticus ) and spinach ( Spinacia oleracea ) in aquaponic system using inland saline groundwater

et al. 2021

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This study was carried out to find suitable salinity for the best growth performance and survival of Nile tilapia (Oreochromis niloticus) with spinach (Spinacia oleracea) in an aquaponic system. The experimental design consisted of inland saline groundwater with salinities 3, 6 and 9 g L−1 as treatments and freshwater as control, carried out in 12 identical aquaponics units with fish stocked at a biomass 1.3 kg m−3 and plants at a density 40 m−2. Nile tilapia reared at salinities 9, 6 and 3 g L−1 showed significantly higher (p < 0.05) feed efficiency ratio and protein efficiency ratio compared to freshwater. The feed conversion ratio of fish at salinities 9, 6 and 3 g L−1 ranged between 1.31–1.43 and significantly differed from control. Final mean biomass were statistically similar at 9 g L−1 (5 kg m−3), 6 g L−1 (4.92 kg m−3) and 3 g L−1 (4.68 kg m−3). Survival of O. niloticus was 100% in all the salinities tested. Spinach was harvested twice during the study, in the first harvest the yield was observed higher in freshwater followed by 3, 6 and 9 g L−1, but in the second harvest, the higher yield was observed in 9 g L−1 followed by 6 g L−1, 3 g L−1 and freshwater. Based on the overall production performance and water quality parameters, a salinity of 9 g L−1 was found to be the best for the integration of Nile tilapia and Spinach in an aquaponic system.

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Section: Discussionsupporting

confidence: 76%

Effect of salinity on growth of Nile tilapia ( Oreochromis niloticus ) and spinach ( Spinacia oleracea ) in aquaponic system using inland saline groundwater

et al. 2021

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“…Similar to DO, pH also remained within the recommended pH value for aquaculture i.e., 6.5–9.0 ( Boyd et al, 1978 ) and suitable range for tilapia i.e. 5.5–9.0 ( Rebouças et al, 2016 ).…”

Section: Discussionmentioning

confidence: 55%

Analysis of the growth performance, stress, profile of fatty acids and amino acids and cortisol in Tilapia (Oreochromis niloticus), cultured at high stocking density using in-pond raceway system

Fatima

Komal

Manzoor

et al. 2021

Saudi Journal of Biological Sciences

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In-pond raceway system technology (IPRS) was introduced in Pakistan in 2019 as solution for sustainable aquaculture approach by effectively increasing production, reducing pollution and facilitating feed and pond management. Fingerlings of GIFT Tilapia ( Oreochromis niloticus ) (n = 16,500 in each raceway, initial weight = 32.00 ± 1.26 g) were stocked in June 2019 in two IPRS raceways (area of each raceway = 220 m 3 ) for 171 days until harvested on November 30, 2019. Fingerlings stocked in traditional earthen ponds (area of each pond = 6167 m 3 ) were studied as control (n = 3000 in each pond, initial weight = 32.00 ± 1.26 g). Average harvested biomass from raceways was 57.33 kg/m 3 with an average daily weight gain per fish of 4.47 g per day. On the other hand, average harvested biomass from control ponds was 0.38 kg/m 3 with an average daily weight gain per fish of 4.60 g per day. Average feed conversion ratio (FCR) in both raceways and control ponds was recorded as 1.25 and 1.24, respectively. Overall survival rate in both raceways and control ponds was above 99%. No sign of any disease was noted at any stage in both study groups. Crude protein and fats contents did not reduce in any raceway despite of high stocking density and sharp seasonal changes. Profile of essential and non-essential amino acids were found to be upto nutritional requirements of adult human. High levels of n-3 and n-6 fatty acids in fish collected from raceways as compared to those in traditional earthen pond show that muscle quality was not compromised due to high stocking density in small area. Return on investment excluding capital cost was 47.05 which implies that IPRS technology can be economically feasible with further modifications.

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“…Still, a recent study has shown a decrease of the total ammonia nitrogen (TAN) in a marine species ( Scophthalmus maximus ) transported for 6 h under the same MS-222 concentration [ 68 ]. In addition, the optimal water pH for the culture of this species varies between 5.5 and 9.0 [ 69 , 70 ] and the small variations observed might have no direct influence on the welfare of the animals. The hematocrit was decreased by the anesthetics after the end of the transportation, which could be an indicator of a decreased oxygen-binding capacity, associated with changes in pH [ 71 , 72 ].…”

Section: Discussionmentioning

confidence: 99%

MS-222 and Propofol Sedation during and after the Simulated Transport of Nile tilapia (Oreochromis niloticus)

Félix

Correia

Sequeira

et al. 2021

Biology

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The use of anesthetics has been suggested as a strategy to hamper live fish transport-induced stress. Still, there is insufficient data available on the use of alternative anesthetics to MS-222. This study investigated the use of propofol to mitigate stress in Nile tilapia (Oreochromis niloticus, 143.8 ± 20.9 g and 20.4 ± 0.9 cm) during a 6 h simulated transport. Individuals (n = 7) were divided into three groups: control, 40 mg L−1 MS-222, and 0.8 mg L−1 propofol. A naïve group non-transported was also considered. During the 6 h transport and 24 h after, the response to external stimuli, opercular movements, water quality parameters, behavior, blood hematology and other physiological values, the histopathology of the gills, the quality of the fillet, and oxidative-stress changes in gills, muscle, brain, and liver were evaluated. Propofol increased swimming activity of fish but decreased opercular movements and responses to external stimuli, indicating oscillations of the sedation depth. Water pH and glucose levels increased, while hematocrit (HCT) and lactate decreased in propofol groups at 6 h. At this time-point, MS-222 also induced a decrease in the HCT and lactate levels while increasing cortisol levels. Despite these effects, the stress-related behaviors lessened with anesthetics compared to the control group. After the recovery period, physiological responses normalized in animals from both anesthetic groups, but the control still had high cortisol levels. Overall, propofol is a good alternative for the transportation of this species, showing efficient sedation without compromising health or fillet quality. However, further pharmacodynamics and pharmacokinetics knowledge is required to support its use in aquaculture settings.

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<b>Reassessment of the suitable range of water pH for culture of Nile tilapia <i>Oreochromis niloticus</i> L. in eutrophic water

Cited by 21 publications

References 15 publications

Effect of salinity on growth of Nile tilapia ( Oreochromis niloticus ) and spinach ( Spinacia oleracea ) in aquaponic system using inland saline groundwater

Effect of salinity on growth of Nile tilapia ( Oreochromis niloticus ) and spinach ( Spinacia oleracea ) in aquaponic system using inland saline groundwater

Analysis of the growth performance, stress, profile of fatty acids and amino acids and cortisol in Tilapia (Oreochromis niloticus), cultured at high stocking density using in-pond raceway system

MS-222 and Propofol Sedation during and after the Simulated Transport of Nile tilapia (Oreochromis niloticus)

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