Journal articles: 'Nile tilapia - Economic performance. eng'

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Elkafrawy, Ibrahim. "Impacts of Feeding Restriction Regimes on Economic and Productive Performance of Nile Tilapia Fish." Journal of Current Veterinary Research 2, no. 2 (October 1, 2020): 39–45. http://dx.doi.org/10.21608/jcvr.2020.121514.

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Passinato, Érica Bevitorio, Francisco Oliveira de Magalhães Junior, Filipe Dos Santos Cipriano, Ricardo Henriquede Bastos Souza, Kauana Santos de Lima, Jorge Chiapetti, and Luis Gustavo Tavares Braga. "Performance and economic analysis of the production of Nile tilapia submitted to different feeding management." Semina: Ciências Agrárias 36, no. 6Supl2 (December 16, 2015): 4481. http://dx.doi.org/10.5433/1679-0359.2015v36n6sup2p4481.

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The productive performance and the variable cost of production were evaluated for different feeding strategies for tilapia during the production cycle. A sample of 2,000 juvenile tilapia was distributed (23.55 ± 2.38 g) into five treatments and with four repetitions as follows: C (feed consumption to apparent satiety), R20 (beginning feed restriction when fish reached an average weight of 20 g), R200 (beginning feed restriction when fish reached an average weight of 200 g), R400 (beginning feed restriction when fish reached an average weight of 400 g) and R600 (beginning feed restriction when fish reached an average weight of 600 g). The fish were given extruded commercial feed containing 34% crude protein until they reached a weight of 200 g, at which time they received feed containing 32% crude protein. Monthly biometrics were performed in order to determine the food restriction starting point, which was one day of restriction followed by six feeding days. The following parameters were evaluated: water quality, productive performance variables, the variable costs of production and excreted nitrogen. The results were subjected to analysis of variance, and the means were compared using Tukey’s test (5% significance). No statistical differences were observed in final weight, weight gain, feed consumption, feed conversion or survival. The fish from the R20 treatment had the lowest variable cost of production (g fish-1) and the lowest nitrogen excretion into the water. This suggests that feed restriction from the early stages of life does not compromise the productive performance and contributes to reducing the variable costs and the quantity of nitrogen excreted into the environment. Thus, a one-day per week feed restriction strategy can be applied from the earliest stages of life without compromising the productive performance or body composition of Nile tilapia. This strategy can also reduce variable costs of production by means of reducing relative labour and feed costs.

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Passinato, Érica Bevitorio, Francisco Oliveira de Magalhães Junior, Filipe Dos Santos Cipriano, Ricardo Henriquede Bastos Souza, Kauana Santos de Lima, Jorge Chiapetti, and Luis Gustavo Tavares Braga. "Performance and economic analysis of the production of Nile tilapia submitted to different feeding management." Semina: Ciências Agrárias 36, no. 6Supl2 (December 16, 2015): 4481. http://dx.doi.org/10.5433/1679-0359.2015v36n6supl2p4481.

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<p>The productive performance and the variable cost of production were evaluated for different feeding strategies for tilapia during the production cycle. A sample of 2,000 juvenile tilapia was distributed (23.55 ± 2.38 g) into five treatments and with four repetitions as follows: C (feed consumption to apparent satiety), R20 (beginning feed restriction when fish reached an average weight of 20 g), R200 (beginning feed restriction when fish reached an average weight of 200 g), R400 (beginning feed restriction when fish reached an average weight of 400 g) and R600 (beginning feed restriction when fish reached an average weight of 600 g). The fish were given extruded commercial feed containing 34% crude protein until they reached a weight of 200 g, at which time they received feed containing 32% crude protein. Monthly biometrics were performed in order to determine the food restriction starting point, which was one day of restriction followed by six feeding days. The following parameters were evaluated: water quality, productive performance variables, the variable costs of production and excreted nitrogen. The results were subjected to analysis of variance, and the means were compared using Tukey’s test (5% significance). No statistical differences were observed in final weight, weight gain, feed consumption, feed conversion or survival. The fish from the R20 treatment had the lowest variable cost of production (g fish-1) and the lowest nitrogen excretion into the water. This suggests that feed restriction from the early stages of life does not compromise the productive performance and contributes to reducing the variable costs and the quantity of nitrogen excreted into the environment. Thus, a one-day per week feed restriction strategy can be applied from the earliest stages of life without compromising the productive performance or body composition of Nile tilapia. This strategy can also reduce variable costs of production by means of reducing relative labour and feed costs. </p>

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Sousa, R. M. R., C. A. Agostinho, F. A. Oliveira, D. Argentim, P. K. Novelli, and S. M. M. Agostinho. "Productive performance of Nile tilapia (Oreochromis niloticus) fed at different frequencies and periods with automatic dispenser." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 64, no. 1 (February 2012): 192–97. http://dx.doi.org/10.1590/s0102-09352012000100027.

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The performance of Nile tilapia (Oreochromis niloticus) raised in cages furnished with an automatic dispenser, supplied at different frequencies (once per hour and once every two hours) and periods (daytime, nighttime and both) was evaluated. Eighteen 1.0m³ cages were placed into a 2000m² pond, two meters deep with a 5% water exchange. One hundred and seventy tilapias, with initial weight of 16.0±4.9g, were dispersed into each 1m³ cage and the feed ration was adjusted every 21 days with biometry. Data was collected from March to July (autumn and winter). Significant difference to final weight (P<0.05) among treatments was observed. The increase in feeding frequency improves the productive performance of Nile tilapias in cages and permitted better management of the food. The better feed conversion rate for high feeding frequency (24 times day-1) can result in saving up to 360kg of food for each ton of fish produced, increasing the economic sustenance for tilapia culture and suggesting less environmental pollution.

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Sadek,, Mohammed. "The Effect of some Dietary Medicinal Herbal Extracts on Growth Performance and Economic Efficiency of Nile Tilapia." Journal of Animal, Poultry & Fish Production 9, no. 1 (July 15, 2020): 47–54. http://dx.doi.org/10.21608/japfp.2020.130634.

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Afram, Foster, Nelson Winston Agbo, Daniel Adjei-Boateng, and Hillary Egna. "Effects of Feeding Strategies on Growth Performance and Economic Returns on the Production of Nile Tilapia (Oreochromis niloticus) in Fertilized Ponds." Aquaculture Studies 21, no. 2 (February 8, 2021): 63–73. http://dx.doi.org/10.4194/2618-6381-v21_2_03.

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This study evaluated the effects of restrictive feeding strategies on the profitability of tilapia production in fertilized ponds. Sex-reversed tilapia fingerlings (~60g) were cultured for five months under three feeding strategies; alternate-day full ration (100%), 66.7% and 75% of full ration daily. Fish fed 75% of the full ration daily had the highest final weight (411.3±39.32 g), followed by fish fed 66.7% of the full ration daily (352.0±9.17 g) and the fish fed alternate-day full ration (227.8±22.17 g). Fish that received the alternate-day full ration had the lowest feed intake (223.8±29.77 g fish-1) and a better feed conversion ratio (1.30±0.12) compared to the fish fed 66.7% (1.51±0.12) and 75% (1.52±0.09) of full ration daily. Crude protein, dry matter, ash content and the hepatosomatic index of the fish were not affected by the feed restriction. The crude lipid, mesenteric fat and the viscerosomatic indices were significantly (P<0.05) lower in fish that received the alternate-day full ration. While the cost of production was lowest in the alternate-day ration, it had the lowest economic returns (US$ 82.95±8.60) compared to fish that received 66.7% and 75% of full ration daily (131.16±22.62 and 162.48±19.64 US$, respectively). These results indicated that tilapia can be cultured in fertilized ponds and fed with two-thirds of daily full ration given in intensive systems without any effect on economic returns.

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Kirimi, James G., Levi M. Musalia, Adiel Magana, and Jonathan M. Munguti. "Performance of Nile Tilapia (Oreochromis niloticus) Fed Diets Containing Blood Meal as a Replacement of Fish Meal." Journal of Agricultural Science 8, no. 8 (July 17, 2016): 79. http://dx.doi.org/10.5539/jas.v8n8p79.

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<p>A 100 days experiment was conducted to determine the effect of feeding blood meal (BM) as a replacement of fish meal (FM), as the main source of animal protein, on growth rate and economic performance of Nile tilapia in fertilized pond. Three isonitrogenous diets (35% crude protein) were formulated using either FM as the main source of animal protein (Diet 1); 50% replacement of FM with blood meal (Diet 2); or 100% replacement of FM with BM (Diet 3). Three hundred Nile tilapia fingerlings (12±3 g) were randomly distributed into three groups of four replicates of 25 fingerlings per cage. The groups were randomly assigned the 3 diets which were fed at 2% of their biomass at 10 am and 4 pm every day. Percentage daily weight gain (DWG), relative growth rate (RGR), specific growth rate (SGR), survival rate and feed utilisation efficiency were measured. Fish fed diet 1 were larger (50.69 g) (P < 0.05) than those fed diet 2 (48.47 g) and 3 (40.37 g). Replacement of FM with 50% and 100% BM reduced the incidence cost (45.55, 37.83 and 31.88, respectively). The profit index was highest with 100% (9.42) replacement of FM, compared to 50% (7.95) and 0% (6.69). Although replacing FM with BM was associated with reduced growth, the economic return was better (P < 0.05). Based on the present results, it was economical to use BM as a major protein source instead of FM in formulating fish feed.</p>

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Fava, Aldo Felipe, Gildete de Souza Bezerra, Dacley Hertes Neu, Fabio Bittencourt, Altevir Signor, Aldi Feiden, Pitagoras Augusto Piana, and Wilson Rogério Boscolo. "Effect of feed processing during the nursery rearing of the Nile tilapia (Oreochromis niloticus)." Revista Agraria Academica 4, no. 4 (July 1, 2021): 55–66. http://dx.doi.org/10.32406/v4n4/2021/55-66/agrariacad.

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This study aimed to compare 5 feed processing for O. niloticus fingerlings: ME1: micro-extruded 1 mm; ED03: extruded and disintegrated 0.3 mm; ED06: extruded and disintegrated 0.6 mm; BF03: bran 0.3 mm and BF06: bran 0.6 mm. Feed conversion was lower in ME1 and ED06. The protein retention coefficient was statistically higher in ME1. The fish proximate composition did not differ among treatments. Although superior in ME1 weight gain did not differ statistically from ED06. ME1 resulted in nitrogen and phosphorus in water statistically lower. ME1, ED06 and BF06 obtained the highest partial net revenues. Thus, ME1 presented the best zootechnical indices, economic performance and reduced impact on water quality.

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Mahanama, Dulmini, Kumudu Radampola, and Erangi Heenkenda. "Effect of Cassava Starch Sources on Growth and Feed Utilization of Nile Tilapia Fingerlings (Oreochromis niloticus) Reared Under Two Dietary Protein Levels." Aquaculture Studies 21, no. 4 (August 8, 2021): 169–79. http://dx.doi.org/10.4194/2618-6381-v21_4_04.

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A 42-day experiment was performed to evaluate the growth performance and feed utilization of Nile tilapia (Oreochromis niloticus) fingerlings fed iso-lipidic diets (5% lipid) contain 17% or 25% of cassava starch extract from fresh root (R starch) or from dry chips (D-starch) at 37% and 30% protein levels. The diets were ie: 37% protein -FM25R17 & FM25D17, 30% Protein- FM15R25 & FM15D25. 144 fish (1.11+0.02g) were distributed in 12 tanks (54 L). Protein level or starch source had no impact on final weight, length, average daily gain, specific growth rate, food conversion ratio, hepato somatic index, viscero somatic index, and Whole-body composition of fish. Protein Efficiency Ratio was not affected by starch source; however, it was significantly higher in diets with low protein content. Apparent Digestibility Coefficient of dry matter was not affected by starch source but was significantly high in low (30%) protein diet. Inclusion of R starch substantially reduced the cost of feed and increased economic profitability. Tilapia fed FM15R25 diet showed similar growth and nutrient utilization to fish fed 37% protein diets and cost of FM15R25 diet was lower than other diets. Therefore, FM15R25 is the best practical diet among the tested diets for Nile tilapia fingerlings.

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Abou-Zied, R. "EFFECT OF DIET EXTRUDED TYPE ON GROWTH PERFORMANCE, FEED UTILIZATION AND ECONOMIC EFFICIENCY OF NILE TILAPIA IN COMMERCIAL FARMS." Egyptian Journal of Nutrition and Feeds 18, no. 1 (April 1, 2015): 143–50. http://dx.doi.org/10.21608/ejnf.2015.104795.

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Shahin, Sara, Wafaa Eleraky, Mahmoud Elgamal, Elsayed Hassanein, and Doaa Ibrahim. "Effect of Olive Leaves and Propolis Extracts on Growth Performance, Immunological Parameters and Economic Efficiency using Nile Tilapia (Oreochromis niloticus)." Zagazig Veterinary Journal 47, no. 4 (December 1, 2019): 447–58. http://dx.doi.org/10.21608/zvjz.2019.17129.1085.

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Henry-Silva, G. G., C. S. P. Maia, R. S. T. Moura, A. P. Bessa Junior, and W. C. Valenti. "Integrated multi-trophic culture of Nile tilapia (Oreochromis niloticus) and Amazon river prawn (Macrobrachium amazonicum) in brackish water." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 67, no. 1 (February 2015): 265–73. http://dx.doi.org/10.1590/1678-6788.

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The aim of this study was to assess the feasibility of integrated multi-trophic culture of Nile tilapia (Oreochromis niloticus) and Amazon River prawn (Macrobrachium amazonicum) in brackish water by evaluating its limnological characteristics and economic performance. The experiment was completely randomized with four treatments and four repetitions: control treatment with Nile tilapia only, stocked with 2 tilapias/m² (P2C0) and three integrated multi-trophic culture treatments stocked with 2 tilapias/m² and prawns at densities of 4, 8 and 16 prawns/m² (P2C04, P2C08 and P2C16, respectively). The limnological variables of temperature, pH, dissolved oxygen, turbidity, ammonia, orthophosphate and chlorophyll "a" were evaluated and throughout the experiment remained within the limits recommended for culture. The experiment lasted 150 days with monthly animal sampling. No significant differences were observed for total fish biomass or for fish and prawn total survival rates. However, prawn individual weight decreased as stocking density increased. Gross revenue was not significantly different between treatments, as well as profitability. The profitability was 40.1% (P2C0), 36.7% (P2C04), 41.2% (P2C08) and 50.1% (P2C16). It is concluded that although feasible from the view point of husbandry, the integrated multi-tropic culture of M. amazonicum and O. niloticus did not influence significantly profitability compared to the monoculture system.

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Khalil, F., A. Gabr, M. Refaey, and M. Al Samarae. "IMPACT OF AQUAFAT-O® ON GROWTH PERFORMANCE, FEED UTILIZATION, CHEMICAL COMPOSITION AND ECONOMIC EFFICIENCY OF ADULT NILE TILAPIA, Oreochromis niloticus." Journal of Animal and Poultry Production 6, no. 5 (May 1, 2015): 287–99. http://dx.doi.org/10.21608/jappmu.2015.52763.

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LITI, D. M., R. M. MUGO, J. M. MUNGUTI, and H. WAIDBACHER. "Growth and economic performance of Nile tilapia (Oreochromis niloticus L.) fed on three brans (maize, wheat and rice) in fertilized ponds." Aquaculture Nutrition 12, no. 3 (June 2006): 239–45. http://dx.doi.org/10.1111/j.1365-2095.2006.00397.x.

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Liti, David, Leah Cherop, Jonathan Munguti, and Lim Chhorn. "Growth and economic performance of Nile tilapia (Oreochromis niloticus L.) fed on two formulated diets and two locally available feeds in fertilized ponds." Aquaculture Research 36, no. 8 (June 2005): 746–52. http://dx.doi.org/10.1111/j.1365-2109.2005.01265.x.

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Abdel-Warith, A.-W., N. Al-Asgah, Y. El-Sayed, A. El-Otaby, and S. Mahboob. "The effect of replacement of fish meal with Amino Acids and Optimized Protein Levels in the diet of the Nile Tilapia Oreochromis niloticus." Brazilian Journal of Biology 79, no. 4 (November 2019): 703–11. http://dx.doi.org/10.1590/1519-6984.189413.

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Abstract This study was conducted to determine an appropriate replacement of fishmeal with amino acids (AAs) and optimized protein levels in practical diets for Oreochromis niloticus with mean initial body weight 12.52±0.63g. Six experimental and a control diet (total 7 diets) divided into two groups, and a control diet (D1) containing 32% protein. The first group contained three diets that included different dietary protein levels, viz. 20 (D2), 25 (D3), and 30% (D4) with AAs when replacing fishmeal by plant protein sources. In the second group, the diets were contained 20 (D5), 25 (D6), and 30% (D7) without AAs. The best growth performance was achieved in fish fed with diet D1. Total feed intake was increased with an increase in dietary protein level with AAs. The specific growth rate showed a similar pattern with a significant difference between control, D4 and D7 compared to other groups. The feed conversion ratio decreased when protein levels in the diets increased. The protein efficiency ratio showed a similar performance, with a slight increase between the control diet and diets with AAs. However, insignificant differences (P>0.05) were observed between diets with and without AAs. An economic evaluation indicated that inclusion of low fishmeal in tilapia diets reduced the price/kg of diets compared to control.

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Amer, Shimaa A., Ali Osman, Naif A. Al-Gabri, Shafika A. M. Elsayed, Ghada I. Abd El-Rahman, Mohamed Tharwat Elabbasy, Shaimaa A. A. Ahmed, and Rowida E. Ibrahim. "The Effect of Dietary Replacement of Fish Meal with Whey Protein Concentrate on the Growth Performance, Fish Health, and Immune Status of Nile Tilapia Fingerlings, Oreochromis niloticus." Animals 9, no. 12 (November 20, 2019): 1003. http://dx.doi.org/10.3390/ani9121003.

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The present study was conducted to assess the effect of replacing fish meal with whey protein concentrate (WPC) on the growth performance, histopathological condition of organs, economic efficiency, disease resistance to intraperitoneal inoculation of Aeromonas hydrophila, and the immune response of Oreochromis niloticus. The toxicity of WPC was tested by measuring the activity of caspase 3 as an indicator of cellular apoptosis. Oreochromis niloticus fingerlings with average initial weight 18.65 ± 0.05 gm/fish (n = 225) for a 10-week feeding trial. The fish were randomly allocated to five experimental groups, having five replacement percentages of fish meal with WPC: 0%, 13.8%, 27.7%, 41.6%, and 55.5% (WPC0, WPC13.8, WPC27.7, WPC41.6, and WPC55.5); zero percentage represented the control group. The results show that the fish fed WPC had the same growth performance as the WPC0. The total weight of bacterially challenged surviving fish increased linearly and quadratically (p ≤ 0.05) by increasing the replacement percentage of fish meal with WPC. The growth hormone, nitric oxide, IgM, complement 3, and lysozyme activity were seen to increase significantly in WPC27.7, especially after a bacterial challenge. The phagocytic percentage and phagocytic index increased significantly in WPC27.7, WPC41.6, and WPC55.5 groups. Histopathological examination of liver sections was badly affected by high replacement in WPC41.6–55.5. The activity of caspase 3 in the immunohistochemical stained sections of the intestine was increased significantly by increasing the inclusion level of WPC. Economically, the total return of the total surviving fish after the bacterial challenge was increased significantly by fish meal replacement with WPC. It could be concluded that WPC could replace the fish meal in Nile tilapia diets up to 27.7%, with improving the gut health, the total weight of survival fish, and immune status of fish challenged with A. hydrophila. High inclusion levels of WPC are not recommended in fish diets, since they negatively affected the intestinal and liver tissues and increased the level of cellular apoptosis, as indicated by the increased caspase 3 activity. Further researches are recommended to evaluate the effect of fish meal replacement with WPC on the histopathological examination of the kidney and to test the capacity of serum IgM to clot the bacteria used for the challenge.

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Waidbacher, Herwig, David M. Liti, Maria Fungomeli, Raphael K. Mbaluka, Jonathan M. Munguti, and Michael Straif. "Influence of pond fertilization and feeding rate on growth performance, economic returns and water quality in a small-scale cage-cum-pond integrated system for production of Nile tilapia (Oreochromis niloticus L.)." Aquaculture Research 37, no. 6 (April 2006): 594–600. http://dx.doi.org/10.1111/j.1365-2109.2006.01467.x.

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"Effect of Protein Levels on Growth Performance, Feed Utilization and Economic Evaluation of Fingerlings Nile Tilapia Fingerlings under Biofloc System." Journal of Animal, Poultry & Fish Production 9, no. 1 (May 1, 2020): 17–26. http://dx.doi.org/10.21608/japfp.2020.130631.

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MM, Gaber. "Effect of Different Water Sources on Survival Rate (%) Growth Performance, Feed Utilization, Fish Yield, and Economic Evaluation on Nile Tilapia (Oreochromis niloticus) Monosex Reared in Earthen Ponds." Oceanography & Fisheries Open access Journal 6, no. 1 (January 22, 2018). http://dx.doi.org/10.19080/ofoaj.2018.05.555676.

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MM, Gaber. "Effect of Different Water Sources on Survival SIJ™ Rate (%) Growth Performance, Feed Utilization, Fish Yield, and Economic Evaluation on Nile Tilapia (Oreochromis niloticus) Monosex Reared in Earthen Ponds." Oceanography & Fisheries Open access Journal 4, no. 4 (August 23, 2017). http://dx.doi.org/10.19080/ofoaj.2017.04.555641.

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Journal articles on the topic 'Nile tilapia - Economic performance. eng'

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