Phytase on the digestibility of plant protein feed for silver catfish, Rhamdia voulezi

Fries, Edionei Maico; Oxford, Jarred Hugh; Godoy, Antônio Misson; Hassamer, Micheli Z.; Corrêia, Arlindo Fabrício; Boscolo, Wilson Rogério; Signor, Arcângelo Augusto

doi:10.1016/j.aquaculture.2020.735528

Cited by 8 publications

(2 citation statements)

References 63 publications

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“…2020; Friesa et␣al. 2020). Additive consumption causes the production of bioactive microbial metabolites, such as vitamins, bioactive peptides, and organic acids (Carbone and Faggio 2016).…”

Section: Discussionmentioning

confidence: 99%

Dietary Pure Polyhydroxyalkanoate Effects on Growth, Nutrient Utilization, Apparent Digestibility, and Hematology in Nile Tilapia

Rodriguez-Estrada

Tachibana²,

Dias³

et al. 2021

N American J Aquac

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In the past decade, different groups of additives (probiotics, oligosaccharides, and plant extracts) have been widely researched and used in worldwide aquaculture. Recently, other groups, such as biopolymers (e.g., poly‐β‐hydroxybutyrate) with prebiotic properties, have been investigated. Among biopolymers, the use of pure polyhydroxyalkanoate (PHA; composition = 95–100%) as a feed additive in aquaculture has not been studied yet. Therefore, the aim of the present study was to research the effects of four supplementation levels of pure PHA on growth, survival, feed and nutrient utilization, apparent digestibility coefficients (ADCs), and hematology of Nile Tilapia Oreochromis niloticus. Five isonitrogenous and isolipidic diets were designed, including a control (C) diet without PHA supplementation. Remaining diets were supplemented with the following levels of PHA: PHA 0.1% (basal diet + 0.1% PHA), PHA 0.5% (basal diet + 0.5% PHA), PHA 1.0% (basal diet + 1.0% PHA), and PHA 2.0% (basal diet + 2.0% PHA). After a 70‐d feeding test period, the PHA 0.5% and PHA 1.0% experimental groups showed significantly higher final body weight, weight gain, specific growth rate, lipid efficiency and productive value, and ADCs of lipid and energy compared to those of the C group. Protein efficiency ratio was significantly higher in fish fed the PHA 0.1%, PHA 0.5%, and PHA 1.0% diets compared to the C group. Protein productive value significantly increased in the PHA 1.0% group. The ADC of protein was significantly higher in fish fed diets supplemented with any level of PHA compared to C fish. Regarding hematological parameters, hematocrit value showed a significant increase in fish fed PHA 0.1% compared to the C group. Leukocyte composition (%) did not show significant differences among experimental groups. Based on polynomial regression analysis, the optimum inclusion levels of PHA in Nile Tilapia diets were 0.82–0.92% for growth performance, 1.0–1.1% for nutrient utilization, 1.0–1.2% for ADCs, and 1.34% for hematocrit. Cost–benefit ratio analysis revealed nonsignificant but numerical differences among experimental diets. Results suggest that pure PHA, when supplemented at 0.1, 0.5, 1.0, or 2.0%, has certain positive effects on growth, nutrient and feed utilization, and ADCs without compromising Nile Tilapia hematology or health.

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Section: Discussionmentioning

confidence: 99%

Dietary Pure Polyhydroxyalkanoate Effects on Growth, Nutrient Utilization, Apparent Digestibility, and Hematology in Nile Tilapia

Rodriguez-Estrada

Tachibana²,

Dias³

et al. 2021

N American J Aquac

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“…Although several studies evaluating the digestibility of different sources of ingredients have recently been run (Oliveira-Filho & Fracalossi 2006, Signor et al 2016, Lewandowski et al 2017, Friesa et al 2020, no studies are evaluating the mineral digestibility in animal by-products meal. Thus, to improve information on digestibility and enhancement of diet formulations, this study aimed to evaluate the digestibility of minerals, dry matter, crude protein, and gross energy of marine fish meal, salmon meal, tilapia by-product meal, meat and bone meal, poultry by-product meal, blood meal, and feather meal for silver catfish.…”

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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Unrevealing the Sources and Catalytic Functions of Phytase with Multipurpose Characteristics

et al. 2021

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Phytase on the digestibility of plant protein feed for silver catfish, Rhamdia voulezi

Cited by 8 publications

References 63 publications

Dietary Pure Polyhydroxyalkanoate Effects on Growth, Nutrient Utilization, Apparent Digestibility, and Hematology in Nile Tilapia

Dietary Pure Polyhydroxyalkanoate Effects on Growth, Nutrient Utilization, Apparent Digestibility, and Hematology in Nile Tilapia

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

Unrevealing the Sources and Catalytic Functions of Phytase with Multipurpose Characteristics

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