Grau de bem-estar relativo de frangos em diferentes densidades de lotação

Bonamigo, Anderson; Silva, C.B.S.; Molento, Carla Forte Maiolino

doi:10.1590/s0102-09352011000600020

Cited by 3 publications

(5 citation statements)

References 14 publications

(2 reference statements)

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“…Temperatures above the ideal may have caused caloric stress in the animals, reducing feed intake and, consequently, the animal weight. These data agree with those obtained by Bonamingo et al (2011), who evaluated the chickens' welfare degree in different stocking densities and observed that the decrease in environmental quality, caused by the lack of effective control over environmental conditions, caused a reduction in the animals' performance.…”

Section: Resultssupporting

confidence: 91%

Rearing Density in the Performance and Profitability of Ross 308 Broilers

Silva

Souza

Garcia

et al. 2021

Rev. Agric. Neotrop.

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The objective was to evaluate the effect of stocking density on productive performance, carcass characteristics, productivity, bone development, and profitability of Ross 308 broilers. A completely randomized experimental design with four stocking densities (10, 12, 14, and 16 birds m-2) and four replicates, and the subplots the bone collection ages (7, 14, 21, 28, 35, and 42 days old). The variables analyzed were live weight at 21 and 42 days, weight gain, feed intake, and conversion in the accumulated periods from 1 to 21 and 1 to 42 days. Weights of carcasses, commercial cuts, edible viscera, abdominal fat, productivity, production efficiency index, viability, and profitability were evaluated. The length, thickness, weight, and Seedor index of long bones (tibiotarsus and femur) were also evaluated. The yield was higher for densities of 14 and 16 birds m-2. The thickness of the tibiotarsus was lower in the density of 12 birds m-2. The increase in the stocking density of 10 or 12 birds m-2, to 14 birds m-2 allows greater productivity per area, without compromising the productive performance, such as carcass characteristics and the animal's bone development, besides being the breeding density with the highest profitability, considering the welfare of Ross 308 broilers.

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Section: Resultssupporting

confidence: 91%

Rearing Density in the Performance and Profitability of Ross 308 Broilers

Silva

Souza

Garcia

et al. 2021

Rev. Agric. Neotrop.

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“…The absence of changes in H:L ratios in the present study indicates that birds did not suffer any physiological stress as a result of the rearing densities applied, and therefore, that their physiological welfare was maintained. These results are consistent with those of Heckert et al (2002), who did not detect any Bonamigo et al (2011), despite not detecting any significant influence of housing density on the H:L ratio of broilers, obtained H:L ratios higher than 1.0 in birds housed at 10 and 15 birds/m 2 , and concluded that these birds were under stress. Table 7 shows the carcass yield results of 29-d-old broilers of different genetic strains reared at different densities.…”

Section: Physiological Stress Indicatorssupporting

confidence: 90%

“…These Bonamigo et al (2011), who did not find any effect of rearing density on these parameters. According to Bounous & Stedman (2000), leukocyte and lymphocyte counts normally range between 12,000-30,000 cells/μL and 7,000-17,500 cells/μL, respectively, and a 50% or higher ratio of lymphocytes relative to total leukocytes is considered physiologically normal (Tabeli et al, 2005).…”

Section: Physiological Stress Indicatorsmentioning

confidence: 68%

“…Blood glucose levels at 21 days of age were significantly reduced as housing density increased (p≤0.05), but were not affected by rearing density in the other evaluated periods (p≥0.05). According to Bonamigo et al (2011), high blood glucose levels indicate acute stress, as glucose needs to be readily available to the sympathetic nervous system to be utilized when animals are submitted to adverse situations. Lin et al (2004) also claim that blood glucose level is an excellent indicator of stress in poultry.…”

Section: Physiological Stress Indicatorsmentioning

confidence: 99%

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Live Performance, Carcass Yield, and Welfare of Broilers of Different Genetic Strains Reared at Different Housing Densities

Arruda

Mendes

Guirro

et al. 2016

Rev. Bras. Cienc. Avic.

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This study evaluated the performance, carcass yield and quality, and physiological stress indicators of broilers of three genetic strains reared at three housing densities for 29 days. A total of 828 day-old male chicks, with average initial weight of 40.0± 2.0g were used. Three genetic strains (Cobb 500, Ross 808, and Ross 508, with 276 birds each) and three housing densities (17, 19, and 21 broilers/m²) were tested. A completely randomized experimental design in a 3 x 3 factorial arrangement, with four replicates of 23 birds each, was applied. The following responses were evaluated: performance parameters (average weekly body weight, average daily gain, feed intake, feed conversion ratio), physiological stress indicators (blood glucose levels, blood cell counts), and carcass yield and quality (dermatosis, bruising, dermatitis, and femoral degeneration scores). Average weekly body weight (BW) and daily weight gain (DWG) were not influenced by rearing density (p≥0.05), but Cobb 500 broilers were the heaviest during the analyzed period. In the second week, Ross 508 birds showed better feed conversion ratio (FCR) when housed at the density of 17 broilers/m² (p≤0.001), whereas the best FCR of Ross 808 and Cobb 500 broilers was obtained at 21 broilers/m² (p≤0.001). Carcass yield was not influenced by the treatments (p≥0.05). Physiological stress indicators were not affected by the treatments, and remained within normal ranges (p≥0.05). Dermatosis scores (scratches) increased (p≤0.05) when housing density increased from 17 to 19 broilers /m².

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“…When elevated, glucocorticoids suggest greater stress suffered by the animals. According to Bonamigo et al (2011), high concentrations of triglycerides can be considered indicators of acute stress. In addition, these authors observed higher concentrations of triglycerides in animals produced in higher density, a condition that is a proxy for worse well-being.…”

Section: Discussionmentioning

confidence: 99%

Performance and well-being of laying hens subjected to various beak trimming methods and rearing systems

Baggio

Lunardi

Testa

et al. 2020

RSD

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The aim to evaluate whether different beak trimming methods affected the performance and well-being of laying hens raised in cage and floor systems. During the starter phase, we used a completely randomized design, with three treatments (hot blade beak trimming, infrared beak trimming, and no beak trimming (control)), with four repetitions and in the grower and production phase, we used a factorial arrangement scheme involving two production systems (cage or floor) and three beak management methods (as above). We reared the birds in starter, grower and production phases over a course of 30 weeks. We evaluated productivity, egg quality, behavioral parameters and biochemical variables. In the starter phase, control birds showed higher blood glucose levels (p=0.043). In the grower phase, birds subjected to hot blade beak trimming and control birds showed lower feed intake and better feed conversion. Triglyceride levels were higher in the cage rearing system (p<0.05). In the production phase, the cage rearing system showed higher productivity (p<0.05), mean egg weight (p<0.01), cholesterol levels (p<0.05) and oxygen reactive species levels (p<0.05). In the production phase, the floor system gave rise to a higher frequency of comfort movement behaviors (p<0.01). Hens in cage had improved their performance and had greater egg production efficiency. The choice of the beak method depends on the breeding system.

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Grau de bem-estar relativo de frangos em diferentes densidades de lotação

Abstract: Grau de bem-estar relativo de frangos em diferentes densidades de lotação [Broiler welfare (6,3±2,3 and 4,5±1,8%), triglycerides (158,9±32,9 e 186,3±43,9mg/dl), globulins ( 1,8±0,5 and 1,5±0,4%), and lighter final weight in DL 15 (1,65±0,28kg in DL10 1,69±0,13 to DL 15.)

Cited by 3 publications

References 14 publications

Rearing Density in the Performance and Profitability of Ross 308 Broilers

Rearing Density in the Performance and Profitability of Ross 308 Broilers

Live Performance, Carcass Yield, and Welfare of Broilers of Different Genetic Strains Reared at Different Housing Densities

Performance and well-being of laying hens subjected to various beak trimming methods and rearing systems

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