Efeito da densidade de criação e do grupo genético sobre a composição mineral e desenvolvimento de ossos longos de frangos de corte

Oliveira, Andréia Fróes Galuci; Bruno, Luís Daniel Giusti; Martins, Elias Nunes; Garcia, Elis Regina de Moraes; Monteiro, Ana Carolina; Leite, Meiby Carneiro de Paula; Pozza, Paulo César; Sangali, Cleiton Pagliari

doi:10.5433/1679-0359.2014v35n2p1023

Cited by 8 publications

(8 citation statements)

References 7 publications

(9 reference statements)

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“…The maximum bone strength was reached with the inclusion of GMF with 218.11 mg kg -1 of Pb, and the maximum bone flexibility was achieved with the inclusion of GMF contaminated with 214.11 mg kg -1 of Pb, at concentrations of Pb higher than these there was a worsening of the values of these variables. According to Oliveira et al (2014), the minerals that make up the bones confer this rigidity, whereas the collagen fibers that form part of the composition of this tissue give it a certain flexibility, which is essential since it helps to prevent bone fractures. Resistance and flexibility are the most important factors that prevent bone fractures.…”

Section: Resultsmentioning

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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Section: Resultsmentioning

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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“…One hypothesis would be that bone tissue is influenced by endogenous and exogenous factors (e.g. temperature, housing density, moving around in the shed) during all rearing stages, which would lead to structural differences that culminate in bone deformities and distortions (OLIVEIRA et al, 2014;MARCHINI et al, 2018). However, Marchini et al (2018) mentioned that birds exposed to one hour of heat daily do not have their tibia morphology altered, and these alterations are possibly more noticeable in longer periods and/or periods of more intense heat stress.…”

Section: Resultsmentioning

confidence: 99%

“…A presumed interpretation for the lack of differences in density and mineral matter of the tibia between the thermal environments is the fact that mineral deposition in the bird skeleton is more intense in the initial weeks; i.e., until 21 days of age (OLIVEIRA et al, 2014); thus, the seven days of exposure to high temperatures (14 to 21 days of age) were not sufficient to cause alterations in mineral matter and density, in relation to the 14 days the birds remained under comfort. Moreover, the intensity and duration of heat stress were not sufficient to affect mineral deposition in the tibia, since the birds managed to recover from the stress they had undergone during the fresher times of the day (BALNAVE, 2004;BUENO et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

“…These data corroborate Flemming et al (1999), who found differences between the relative weight of the leg bone between two commercial lines (Cobb, 21.54% × Hubbard, 23.51% relative weight compared to the total leg weight) and Silva et al (2017), who found a higher leg yield in the Hubbard line (26.52%) compare to Cobb (25.14%). Oliveira et al (2014) stated that, overall, there are no bone differences between rapidgrowing commercial broiler lines and that delayed development of long bones (e.g., tibia, femur and humerus) occurs in free-range birds.…”

Section: Resultsmentioning

confidence: 99%

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Bone parameters and organ morphometry of two broiler chicken lines exposed to heat for different periods

Moraes

Bueno

Nascimento

et al. 2019

SCA

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The objective of this study was to evaluate the effects of different times of exposure to heat on bone parameters and organ morphometry of Cobb Slow ® and Hubbard Flex ® broilers exposed to high temperatures for 1, 2 or 3 h daily, from 14 days of age. A total of 1120 one-day-old male chicks (half of each line; average weight of 44 g) were housed into 32 cages with 35 birds each, in a randomizedblock experimental design. From the first to the 13th day of age, the birds remained under the thermal conditions recommended for their lines; thereafter, from the 14th day, the shed was separated into four parallel sections of 5.60 × 10.20 × 2.8 m delimited by double-sided plastic curtains along the width of the shed. Cyclic heat stress was generated by average temperatures of 36 ºC from 14-20 days, 35 °C from 21-27 days, 34 °C from 28-34 days and 33 °C from 35-42 days. The total length, width, density and mineral matter of the tibia; the size of the duodenum, jejunum and ileum; and the weights of the bursa of Fabricius and spleen were measured. No interaction effect between thermal environment and line was observed. Heat stress for up to 3 h daily, from the 14th to the 41st day of age, led to a longer but narrower tibia. There was no influence on small intestine morphometry. The Hubbard line presented longer and wider tibiae as well as higher relative and absolute weights of the bursa. In conclusion, heat stress from 2 h daily modifies the structure of the tibia in broilers, which increases in length and reduces in width, but heat exposure has no influence on the small intestine or lymphoid organs. The Hubbard line shows better tibia development than the Cobb line as well as different primary lymphoid responses, represented by a heavier bursa.

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“…Para a resistência óssea, não houve diferença significativa (P>0,05) entre diferentes densidades de alojamento (Tabela 6). Esses resultados estão de acordo com os encontrados por Oliveira et al (2014) Rev. Bras.…”

Section: Resultsunclassified

Efeito da densidade de alojamento sobre a incidência de pododermatite e características ósseas de frangos de corte criados em aviários Dark House

Cristo

Schimidt

Perini

et al. 2017

Rev. bras. saúde prod. anim.

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Efeito da densidade de criação e do grupo genético sobre a composição mineral e desenvolvimento de ossos longos de frangos de corte

Cited by 8 publications

References 7 publications

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

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

Bone parameters and organ morphometry of two broiler chicken lines exposed to heat for different periods

Efeito da densidade de alojamento sobre a incidência de pododermatite e características ósseas de frangos de corte criados em aviários Dark House

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