Phytase in diets for Nile tilapia in the growth period

Bock, Claudio Luiz; Pezzato, Luiz Edivaldo; Cantelmo, Osmar Angelo; Barros, Margarida Maria

doi:10.1590/s1516-35982007000700001

Cited by 9 publications

(4 citation statements)

References 13 publications

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“…The diet with 10% of replacement plus SSF increased the body phosphorus level in 12% when compared the treatment with 10% of replacement. Similar results were verified by Bock et al (2007) that found higher amount of phosphorus and calcium in the body composition when tilapias were fed with diets contained phytase. These same authors also mentioned that the use of phytase in diets for Nile tilapia in growth phase can reduce levels of inclusion of inorganic phosphorus in feed and minimize environmental impacts.…”

Section: Resultssupporting

confidence: 83%

Crambe meal in diets supplemented with enzyme complex solid state fermentation (SSF) for Nile tilapia

Moura¹,

Pedreira²,

Lanna³

et al. 2015

Afr. J. Agric. Res.

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Nile tilapia performance fed with diets containing crambe meal supplied with enzyme complex SSF was evaluated. With initial average weight ranging between 1.133g ± 0.105, 280 Nile tilapias were randomized into seven treatments, with four replicates and 10 fish per tank, totaling 28 experimental units. The temperature-controlled recirculation system had 30 L per tank, with individual water supply and aeration. The physico-chemical parameters of the water (temperature, dissolved oxygen, ammonia and pH) were monitored periodically. The fish went through an adaptation period of one week prior to starting the trial. The treatments consisted of a control diet and others diets containing three levels of inclusion of crambe meal, being replaced in their proper proportion, the protein soya by the protein ingredient evaluated (5, 10 and 20%) with 500 ppm of enzyme complex SSF or not. The isoproteic diets (360 g.kg-1) contained the same amount of the ingredients, changing only the levels of inclusion of soya meal, crambe meal and inert. Fish were fed ad libitum four times per day. At 56 days, the tilapia performance was evaluated. The physic and chemistry parameters of water were within of the levels recommended for the species during all experimental time There was statistical difference for final weight, weight gain and feed conversion. It is concluded that the inclusion of up to 10% crambe meal supplemented with 500 ppm of enzyme complex SSF provides better performance and higher nitrogen retention for Nile tilapia.

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Section: Resultssupporting

confidence: 83%

Crambe meal in diets supplemented with enzyme complex solid state fermentation (SSF) for Nile tilapia

Moura¹,

Pedreira²,

Lanna³

et al. 2015

Afr. J. Agric. Res.

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“…However, it is common to use feeds using alternative and conventional foods of vegetal origin, as cottonseed meal, sunflower meal, peanut meal in replacement of soybean meal and fishmeal, to reduce production costs (Abimorad et al, 2012). These foods, which present about 70% or more of phosphorus, cannot be fully absorbed by monogastric animals, as they are in the form of phytate, non-hydrolysable substance in fish intestine (Storebakken et al, 1998;Bock et al, 2007). An alternative would be to reduce the percentage of phosphorus in the diet, fact would decrease the final costs of production without compromising feed quality.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen and phosphorus flux from the production of Nile tilapia through the application of environmental indicators

et al. 2017

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We aimed in this study utilize environmental indicators as a quantitative method to evaluate and discuss the nitrogen (TN) and phosphorus (TP) flux by a production stage grow-out (termination) of Nile tilapia (Oreochromis niloticus) in fishpond. The TN and TP load, the mass balance, the input of TN and TP via feed and the converted nutrients in fish biomass are the environmental indicators applied in this study. During the production cycle (128 days), the system exported 15,931 g TN and 4,189 g TP that were related to the amount of feed supplied (r Pearson = 0.8825 and r = 0.8523, respectively), corroborated by the feed conversion ratio (1.61:1). The indicators showed that 26% TN and 45% TP were reversed into fish biomass, 62% TN and 40% TP were retained in the fishpond, and 12% TN and 15% TP were exported via effluent. The largest contribution of nutrients generated by the system and exported via effluent was observed in phase III and IV. This result is supported by the feed conversion ratio 2.14 and 2.21:1 obtained at this phase, a fact explained by the amount of feed offered and the fish metabolism. Application of environmental indicators showed to be an efficient tool to quantify flux of TN and TP produced during the grow-out period of Nile tilapia and therefore, guide management practices more sustainable. Concerning the environmental sustainability of the activity the implementation of best management practices such as the better control of the feed amount offered would lead to a smaller loss of TN and TP to the water. Furthermore, the use of better quality feeds would allow greater nutrient assimilation efficiency.Keywords: environmentally sustainable management, nutrients load, mass balance, fish-farming, Oreochromis niloticus. Fluxo de nitrogênio e fósforo na produção de tilápia-do-nilo (Oreochromis niloticus) a partir da aplicação de indicadores ambientais ResumoNós objetivamos neste estudo, utilizar indicadores ambientais como método quantitativo para avaliar e discutir sobre o fluxo de nitrogênio (TN) e fósforo (TP) na etapa final de crescimento (terminação) de tilápia-do-nilo (Oreochromis niloticus) em viveiro escavado. A carga de TN e TP, o balanço de massa, a entrada de nutrientes via ração e o TN e TP convertido em biomassa de peixe foram os indicadores ambientais utilizados neste estudo. Durante o ciclo produtivo (128 dias), o sistema exportou 15.931 g NT e 4.189 g PT os quais foram relacionadas às quantidades de alimento fornecido (r Pearson = 0,8825 e r = 0,8523, respectivamente), corroborada pela conversão alimentar (1,61:1). Os indicadores evidenciaram que 26% NT e 45% PT foram revertidos em biomassa de peixe, 62% NT e 40% PT ficaram retidos no viveiro e 12% NT e 15% PT foram exportados via efluente. O maior aporte de nutrientes gerado pelo sistema e exportado via efluente foi verificado nas fases III e IV. Este resultado é corroborado pelas taxas de conversão alimentar de 2,14 e 2,21:1 obtida nestas fases, fato explicado pela quantidade de ração ofertada e pelo metabolismo dos peixe...

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“…Ca requirements by fish are largely met by absorption from the aquatic environment through the gills (De Miranda et al 2000), with the gut being a site of poor absorption for this mineral (Lall 2002). In addition, it is common for Ca digestibility studies to confuse results because of the ability of Ca to be absorbed from the water by fish (Bock et al 2007, Lewandowski et al 2017. ADC values for relatively high Ca were observed in different ingredients tested, ranging from 45 to 60%.…”

Section: Mineral Digestibility Coefficientsmentioning

confidence: 99%

“…The appropriate inclusion of mineral levels in fish diets can prevent a macrominerals interaction, such as Ca and P, with other minerals present in the gastrointestinal tract (Lall 2002, Guimarães et al 2012. It also reduces the excessive discharge of P, a major nutrient responsible for eutrophi-cation in water bodies (Bock et al 2007). Furthermore, the correct balance of minerals in the diet reduces the need to include inorganic sources of minerals, which have low bioavailability than organic sources and may make it possible to formulate economic and environmentally safe diets.…”

Section: Introductionmentioning

confidence: 99%

Mineral digestibility of different animal sources for the silver catfish Rhamdia voulezi

Frei

Pessini

Cozer

et al. 2021

Lat. Am. J. Aquat. Res.

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This study aimed to evaluate the apparent digestibility coefficients (ADCs) of dry matter, crude protein, gross energy, and minerals of marine fish meal (MFM), salmon meal (SM), tilapia by-product meal (TBM), meat and bone meal (MBM), poultry by-product meal (PBM), blood meal (BM), and feather meal (FM) by silver catfish Rhamdia voulezi. Groups of 12 fish were fed the experimental diet three times a day until apparent satiation, and the fecal samples were collected from an accumulation device. SM and PBM exhibited the highest digestibility values for dry matter, crude protein, and gross energy, while MBM and FM presented significantly lower ADCs for dry matter. BM and FM exhibited higher ADCs for phosphorus, 65.05 and 63.87%, respectively. The ADCs for calcium were 58.8% for MFM, 56.69% for TBM, and 60.08% for PBM. PBM and FM had the highest iron ADCs, 44.01 and 46.29%, respectively. Magnesium ADCs ranged from 44.87% for MBM to 75.50% for TBM. BM had the highest digestibility for zinc (62.77%), whereas MBM (36.68%) and FM (39.39%) had the lowest. In general, SM and PBM showed higher values as feedstuffs for silver catfish feeds. At the same time, the digestibility was lower for TBM and MBM for macronutrients and minerals such as phosphorus, iron, and zinc.

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Phytase in diets for Nile tilapia in the growth period

Cited by 9 publications

References 13 publications

Crambe meal in diets supplemented with enzyme complex solid state fermentation (SSF) for Nile tilapia

Crambe meal in diets supplemented with enzyme complex solid state fermentation (SSF) for Nile tilapia

Nitrogen and phosphorus flux from the production of Nile tilapia through the application of environmental indicators

Mineral digestibility of different animal sources for the silver catfish Rhamdia voulezi

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