Desempenho de frangos de corte criados em diferentes densidades populacionais, no inverno, no Sul do Brasil

Mortari, A; Rosa, Alexandre Pires; Zanella, Irineo; Neto, Carlos Beretta; Visentini, Paulo Roberto; Brites, Lourdes B. Padilha

doi:10.1590/s0103-84782002000300020

Cited by 13 publications

(12 citation statements)

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“…No differences were observed since a small carcass has a smaller cut whereas a large carcass has a large cut, with the same percentage. These data are in accordance with those found by Mortari et al (2002), who assessed broiler chicken performance at four stocking densities (10, 12, 14, and 16 birds m ) and observed those densities affected carcass characteristics. Table 3.…”

Section: −2supporting

confidence: 92%

“…Mortari et al (2002), studying the performance of broiler chickens reared at densities of 10, 12, 14, and 16 birds m , observed a decreased weight gain as the density increased. These authors concluded that feed intake and live weight were higher in birds reared at lower densities, but feed conversion and rearing viability showed no effect from stocking density, which was also observed in this study.…”

Section: −2mentioning

confidence: 99%

“…These authors also observed a greater production of kilograms of live weight per m 2 with the increased density, allowing increments in gross income. Mortari et al (2002) assessed the performance of broiler chickens reared at different stocking densities and observed that when increasing stocking density, revenue and profit are increased. The lowest economic return was obtained with 10 birds m −2 whereas the largest one was obtained with 16 birds m −2…”

Section: Introductionmentioning

confidence: 99%

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Effect of stocking density on performance, carcass yield, productivity, and bone development in broiler chickens Cobb 500®

Henrique

Oliveira

Ferreira

et al. 2017

SCA

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This study aimed to assess the effect of stocking density of 10, 12, 14, and 16 birds m −2 on performance, carcass and cut yields, productivity, and bone development of broiler chickens Cobb 500 ® . The experimental design was completely randomized design with four treatments (stocking densities) and four replications. The assessments were performed weekly at 1, 7, 14, 21, 28, 35, and 42 days. The best live weight result was found at a density of 10 birds m −2 in the period from 1 to 7 days. No effect of density was observed on feed intake and weight gain. From 1 to 14 days, the best live weights were found at densities of 10, 12, and 14 birds m . In the period from 1 to 21 days, live weight and weight gain were higher at densities of 10, 12, and 14 birds m . A difference (P < 0.05) was observed for live weight, weight gain, and feed intake of animals reared at densities of 10, 12, and 14 birds m −2 for the phases from 1 to 35 days and the total phase from 1 to 42 days of bird age when compared to 16 birds m −2 , which presented lower performance. However, feed conversion of 1-7, 1-14, 1-21, 1-35, and 1-42 days and carcass and cut characteristics showed no significant differences for all treatments. On the other hand, productivity was higher in the treatments with 14 and 16 birds m −2 , but without difference between each other. No interaction (P>0.05) was observed between stocking density and age for the assessed bone parameters. Similarly, no difference (P>0.05) was observed for bone development of broiler chickens reared at different stocking densities for the studied parameters. Thus, the increased density of 10 or 12 birds m −2 to 14 birds m −2 has no influence on zootechnical performance, carcass and cut yields, and bone development, but increases broiler chicken productivity reared in a conventional shed without air conditioning.

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Section: −2supporting

confidence: 92%

Section: −2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of stocking density on performance, carcass yield, productivity, and bone development in broiler chickens Cobb 500®

Henrique

Oliveira

Ferreira

et al. 2017

SCA

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“…On the other hand, Moreira et al (2004), evaluating three housing densities (10, 13, or 16 broilers/m 2 ), observed significant reduction in weight gain in birds housed at 10 and 16 birds/ m 2 . Mortari et al (2002) also reported reduced body weight as rearing density increased, and Thomas et al (2004), Dozier et al (2005a) *significant at 5%; **significant at 1%; means followed by different lowercase letters within a column are statistically different; means followed by different uppercase letters within a row are statistically different.…”

Section: Resultsmentioning

confidence: 91%

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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“…Dessa forma, esse tema foi alvo de várias pesquisas visando avaliar as melhores densidades de estocagem para diferentes espécies animais, em seu ambiente de criação, como aves em galpões (Mortari et al, 2002), suínos em baias (Banhazi et al, 2001), coelhos em gaiolas (Oliveira & Almeida, 2002), camarões em viveiros (Zimmerman & Raupp, 1992) e peixes em tanques e viveiros (Carneiro et al, 1999;Graeff & Pruner, 1999e 2000Vieira et al, 2000;Gomes & Schlindwein, 2000;Souza-Filho & Cerqueira, 2003;Cavero et al, 2003;Salaro et al, 2003). Embora esses estudos tenham sido realizados com espécies diferentes, várias conclusões devem ser verificadas e avaliadas na recria de rãs, observando-se as devidas particularidades.…”

Section: Introductionunclassified

Efeito da densidade de estocagem no desempenho de rã-touro (Rana catesbeiana) em recria

et al. 2005

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RESUMO -Este trabalho foi realizado com o objetivo de avaliar quatro densidades de estocagem na recria de rã-touro em mini-baias. As densidades estudadas foram: D1: 75 rãs/m² (inicial) e 35 rãs/m² (final); D2: 105 rãs/m² (inicial) e 50 rãs/m² (final); D3: 125 rãs/m² (inicial) e 60 rãs/m² (final); e D4: 160 rãs/m² (inicial) e 75 rãs/m² (final). No ensaio de desempenho, foram utilizadas 558 rãs com peso médio de 26,80 g durante 56 dias, distribuídas em um delineamento em blocos casualizados, com seis repetições. Houve efeito das densidades sobre o ganho de peso, que foram inversamente proporcionais. Menores densidades resultaram em maior consumo de alimento, de modo que, com o uso das densidades iniciais de 75 e 105 rãs/m², obteve-se maior consumo de alimento que o uso de 125 e 160 rãs/m². A conversão alimentar aparente também variou; a densidade inicial de 160 rãs/m² proporcionou a pior média desse parâmetro. Os tratamentos foram avaliados economicamente, segundo os custos com alimentação, a receita bruta e a receita líquida parcial proporcionados. Concluiu-se que a densidade final de 50 rãs/m² aumentou a receita líquida parcial, proporcionando resultados mais adequados para produção de rãs.Palavras-chave: avaliação econômica, pós-metamorfose, ranicultura Effects of Stocking Density on Performance of Bullfrog (Rana catesbeiana) in thePost-metamorphic Phase RESUMO -This work was carried out with the objective of evaluate four stocking densities of bullfrog (post-metamorphic) in mini-stalls. The densities studied were D1: 75 bullfrogs/m² (initial) and 35 bullfrogs/m² (finishing); D2: 105 bullfrogs/m² (initial) and 50 bullfrogs/m² (finishing); D3: 125 bullfrogs/m² (initial) and 60 bullfrogs/m² (finishing); and D4: 160 bullfrogs/m² (initial) and 75 bullfrogs/m² (finishing). The performance trial was carried out with 558 bullfrogs averaging initial weight of 26.80 g, during 56 days, according to a completely randomized blocks design with six replicates. Inversely proportional effects of densities on weight gain were observed. Smaller densities resulted in greater values of feed intake, and the initial densities of 75 and 105 bullfrogs/m² resulted in higher values of feed intake than 125 and 160 bullfrogs/m². The apparent feed conversion also varied , showing the worst average on initial density of 160 bullfrogs/m². Economic analysis was performed with the costs with feeding, gross income and partial net income. It was concluded that the final density of 50 bullfrogs/m² increased the partial net income and was indicated for production of bullfrogs.

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Desempenho de frangos de corte criados em diferentes densidades populacionais, no inverno, no Sul do Brasil

Abstract: RESUMOO trabalho teve por objetivo determinar a influência da densidade de 10, 12, 14

Cited by 13 publications

References 4 publications

Effect of stocking density on performance, carcass yield, productivity, and bone development in broiler chickens Cobb 500®

Effect of stocking density on performance, carcass yield, productivity, and bone development in broiler chickens Cobb 500®

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

Efeito da densidade de estocagem no desempenho de rã-touro (Rana catesbeiana) em recria

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