Possibilidade do uso de Mexilhão Dourado contaminado com metais tóxicos em dietas para frangos de corte

Wachholz, Lucas; Nunes, Ricardo Vianna; Broch, Jomara; Souza, Cleison de

doi:10.24188/recia.v9.n2.2017.562

Cited by 6 publications

(5 citation statements)

References 29 publications

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“…Broiler production provides quality animal protein at low cost and is accessible to most social classes (Oliveira et al, 2018). Because nearly 70% of all costs in broiler production are related to feeding, there is a need to promote the use of alternative ingredients in their diets (Wachholz et al, 2017). The increase in chicken production and resultant increase in residues produced by the sector have led to higher production of animal by-product meals, which can be considered an alternative source of nutrients to reduce broiler production costs by partly replacing soybean bran.…”

Section: Introductionmentioning

confidence: 99%

Protease inclusion in plant- and animal-based broiler diets: Performance, digestibility and biometry of digestive organs

Carvalho¹,

Leandro²,

Andrade³

et al. 2020

SA J. An. Sci.

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The addition of protease to broiler diets may complement the action of endogenous enzymes and improve protein digestibility. Here, the authors evaluated the effect of adding protease to broiler diets that contained animal-based meal on bird performance, digestibility, and biometry of digestive tract organs. Four treatments, which contained animal- or plant-based meals with or without supplementary protease were compared, namely basal vegetable feed (BVF), BVF + protease (BFP), basal vegetable feed + animal by-product meal (BFA), and BFA + protease. In the first experiment, 320 one-day-old Cobb 500® chicks were allocated to eight replicates with 10 birds per replicate. The experimental period was seven days, and nutrient metabolizability was evaluated. In the second experiment, 720 one-day-old Cobb 500® chicks were assigned to treatments in a similar manner, with six replicates and 30 birds per replicate, but the experimental period was 42 days. Significant differences (P <0.05) were observed between treatments for nutrient digestibility, weight gain, feed consumption, average final weight, food conversion, viability, and biometry of the pancreas. Treatments with animal-based meals had the highest digestibility. Birds fed these meals grew faster in the pre-starter phase and consumed less feed between 1 and 21 days. However, between 1 and 42 days old, broilers fed plant-based diets had better feed conversion, and the group that did not receive protease supplementation had a better liveability rate.Keywords: additive, exogenous enzyme, nutrition, organ biometry, poultry

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Section: Introductionmentioning

confidence: 99%

Protease inclusion in plant- and animal-based broiler diets: Performance, digestibility and biometry of digestive organs

Carvalho¹,

Leandro²,

Andrade³

et al. 2020

SA J. An. Sci.

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“…Although L. fortunei reaches very high densities too, harvesting mussels for commercial purposes has never been reported, and would probably be economically unviable given their very patchy distribution. On the other hand, cleaning of industrial facilities and fish farms often produces huge amounts of dead mussels, which have occasionally been evaluated for the production of farm animal or cultivated fish fodder (Almeida et al, 2006 ; Bayerle et al, 2017 ; Wachholz et al, 2017 ), and for the neutralization of soil acidity and the supply of nutrients for plants (Barbosa, 2009 ; Silva, 2016 ). Although some results are encouraging, none has yet been applied on industrial scales, and the presence of contaminants in the mussels’ residues were often considered a major obstacle (see “ Disservices, caveats, and unresolved issues ” section).…”

Section: Provisioning Servicesmentioning

confidence: 99%

Ecosystem services provided by the exotic bivalves Dreissena polymorpha, D. rostriformis bugensis, and Limnoperna fortunei

et al. 2022

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The ecosystem services approach to conservation is becoming central to environmental policy decision making. While many negative biological invasion-driven impacts on ecosystem structure and functioning have been identified, much less was done to evaluate their ecosystem services. In this paper, we focus on the often-overlooked ecosystem services provided by three notable exotic ecosystem engineering bivalves, the zebra mussel, the quagga mussel, and the golden mussel. One of the most significant benefits of invasive bivalves is water filtration, which results in water purification and changes rates of nutrient cycling, thus mitigating the effects of eutrophication. Mussels are widely used as sentinel organisms for the assessment and biomonitoring of contaminants and pathogens and are consumed by many fishes and birds. Benefits of invasive bivalves are particularly relevant in human-modified ecosystems. We summarize the multiple ecosystem services provided by invasive bivalves and recommend including the economically quantifiable services in the assessments of their economic impacts. We also highlight important ecosystem disservices by exotic bivalves, identify data limitations, and future research directions. This assessment should not be interpreted as a rejection of the fact that invasive mussels have negative impacts, but as an attempt to provide additional information for scientists, managers, and policymakers.

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“…The presence of contaminants of gold and especially heavy metal might be the main limiting factor for the use of these in animal diets. Another aggravating factor that hinders the use of this is a shortage of canisters in Brazil, which leads us to demand more Pb in the diets administered to animals (WACHHOLZ et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…In order to implement a new ingredient in broiler diets, evaluations must be carried out to verify the presence of contaminants that affect the food and, consequently, the final consumer. Therefore, it is possible to carry out studies aiming to evaluate the possibility of using golden blood in the feeding of broilers without contaminating the birds with any kind of toxic metal (WACHHOLZ et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effect of the use of golden mussel flour contaminated with lead as a source of calcium on the performance of broilers

Wachholz

Nunes

Gonçalves

et al. 2019

SCA

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The objective of this study was to evaluate the use of lead contaminated golden mussel flour (GMF) as a source of calcium for broiler chickens from 14 to 42 days of age and to verify the probable effects on performance, tissue contamination, blood parameters, Pb digestibility, and bone quality. The experiment was conducted in a completely randomized design (DIC), with four levels of Pb contamination (71.33, 147.55, 223.78, and 300 mg kg-1 Pb) in GMF, with five replicates and three birds per experimental unit. Sixty-four-day-old Cobb male broilers housed in metabolism cages were used. GMF was added to rations instead of calcitic limestone. The zootechnical variables were evaluated: feed intake, weight gain, and feed conversion, as well as the digestibility of nutrients. In addition, the serum biochemistry of the birds transaminases, total bilirubin, calcium, and phosphate was studied and the concentration of lead in the tissues and the bone quality of the birds was determined. The tibia was collected for evaluation of bone quality. The levels of Pb contamination in the golden mussel did not change the performance of the birds (P ? 0.05) or the Pb levels in the muscle Pectoralis major, skin, liver, feather, bones, and serum, or the serum levels of ALT, GGT, and total bilirubin, however, there was an effect of Pb levels (P < 0.01) on AST concentrations. Pb levels altered the values (P < 0.01) of the apparent digestible Pb and the coefficient of apparent digestibility of Pb, with an increasing linear effect. There was no effect (P ? 0.05) on bone stiffness, however flexibility and bone strength were altered (P < 0.05). Serum Ca and P concentrations did not show changes (P ? 0.05) due to the use of Pb levels in GMF. In this study, it can be observed that the use of GMF with Pb up to 300 mg kg-1 as a source of Ca in broiler diets does not alter performance, however the use of GMF contaminated with Pb above 73.33 mg kg-1 promotes contamination of the tissues of the animals with Pb, making it impossible to consume the birds. It was concluded that the increase in Pb concentrations in GMF increases the digestibility and metabolism of this metal and causes an increase in the production of AST by the liver. Pb levels in GMF above 214.11 mg kg-1 impair bone strength and flexibility.

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Possibilidade do uso de Mexilhão Dourado contaminado com metais tóxicos em dietas para frangos de corte

Cited by 6 publications

References 29 publications

Protease inclusion in plant- and animal-based broiler diets: Performance, digestibility and biometry of digestive organs

Protease inclusion in plant- and animal-based broiler diets: Performance, digestibility and biometry of digestive organs

Ecosystem services provided by the exotic bivalves Dreissena polymorpha, D. rostriformis bugensis, and Limnoperna fortunei

Effect of the use of golden mussel flour contaminated with lead as a source of calcium on the performance of broilers

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