Empenamento, níveis hormonais de triiodotironina e tiroxina e temperatura corporal de frangos de corte de diferentes genótipos criados em diferentes condições de temperatura

Dahlke, Fabiano; Gonzáles, Elisabeth; Gadelha, Adriano Cordeiro; Maiorka, Alex; Borges, Sebastião Aparecido; Rosa, P. S.; Filho, D. E. Faria; Furlan, Renato Luís

doi:10.1590/s0103-84782005000300029

Cited by 20 publications

(15 citation statements)

References 12 publications

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“…This behavior was previously described by Pereira et al (2007), who reported that Ross® 350 broilers were more susceptible to stress than Cobb ® 500 broilers, and may present high metabolic rates when faced with stressful situations, such as pre-slaughter handling (Roque-Specht et al, 2009). Broilers usually change their behavior when facing stress, and try to adapt to it (Dahlke et al, 2005). Some behavioral patterns found in the present study ( Figure 1) were also reported by other authors, such as wing flapping and stretching (Alcoock, 2011).…”

Section: Resultssupporting

confidence: 88%

“…Corticosterone may also induce cardiovascular diseases, ascites, and modifications in immune functions (Grandin, 1998), in addition of causing lymphoid tissue hypotrophy and hypoplasia (Compton et al, 1990). In addition of blood changes, an increase in the heat exchange in the featherless body parts of broilers under stress is also observed (Dahlke et al, 2005) due to the increase in peripheral vasodilatation (Borges et al, 2003), leading to variation in surface temperature (Nääs, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Welfare of Broilers Ingesting a Pre-Slaughter Hydric Diet of Lemon Grass

Royer

Garcia

Borille

et al. 2015

Rev. Bras. Cienc. Avic.

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The pre-slaughter period is considered critical in broiler production. Several factors contribute to increase the birds' stress, such as handling, harvesting, and transportation, negatively affecting their welfare. This study aimed at evaluating the addition of lemon grass (Cymbopogon citratus Stapf) to the drinking water of broilers during the pre-slaughter period on their behavior, blood cortisol, and surface temperature. The study was carried out at the experimental farm of the Federal University of Grande Dourados (UFGD), Dourados, MS, Brazil. In total, 2594 broilers were distributed according to a completely randomized experimental design, in a 3x2x2 factorial arrangement, with four replicates per treatment. Treatments consisted of three different lemon grass levels (Cymbopogon citratus Stapf) used in the form of an infusion (0, 0.1, and 5 g per L of water), sex (male or female), and genetic strain (Ross® 308 or Cobb® 500). The infusion was offered when birds were 42 days old. On that day, blood was collected for blood cortisol level determination, broiler surface temperature was recorded, and an ethogram was applied to register broiler behavior. Blood cortisol level and broiler surface temperature were not affected by treatments (p>0.05). The behavior of beak opening was different between the genetic strains (p<0.05), being more frequent in Ross® 308 broilers. Lemon grass water content did not affect broilers' surface temperature when consumed during the pre-slaughter period.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Welfare of Broilers Ingesting a Pre-Slaughter Hydric Diet of Lemon Grass

Royer

Garcia

Borille

et al. 2015

Rev. Bras. Cienc. Avic.

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“…These results are in agreement with those found by Dahlke et al (2005), who observed an increase in the surface temperatures of the head, breast, back, and the average surface temperature of 42-day old broilers kept at 32 °C, compared with those kept at 22 °C. Dahlke et al (2005) argue that the temperature variations on the outer surface of broilers (head, chest, and back) are mechanisms available to the birds to keep their internal temperature constant, suggesting an increase in the heat flow from the body core towards the external surface of the body.…”

supporting

confidence: 93%

“…Dahlke et al (2005) argue that the temperature variations on the outer surface of broilers (head, chest, and back) are mechanisms available to the birds to keep their internal temperature constant, suggesting an increase in the heat flow from the body core towards the external surface of the body. Based on these factors, the higher surface temperatures of quails kept at 32 °C than those kept at 26 °C is justified.…”

mentioning

confidence: 99%

Productive characteristics of meat quails reared in different environments

Bonfim

Siqueira

Bomfim

et al. 2016

SCA

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The objective of this study was to evaluate the effects of ambient temperature and consumption on the performance, carcass yields and cuts, organs, and body temperatures of meat quails. The experiment was conducted at the Federal University of Maranhão, campus of Chapadinha-MA, during September to October 2013. From the 14th day of age, 450 meat quails, not sexed, with an average initial weight of 90.4 ± 12.9 g, were distributed in batteries and accommodated in either acclimatized or non-acclimatized rooms, until 42 days of age. The experimental design was completely randomized, with three treatments, and six replicates of 25 birds each. The treatments were CE (acclimatized environment at 26 °C); NE (natural environment), and CECC (acclimatized environment at 26 °C with controlled feed, to keep the same consumption level as that of the birds in NE). The evaluated variables at 28 and 42 days of age were as follows: (1) the intake of feed, weight gain, feed conversion, body weight, and energy efficiency to weight gain, (2) the carcass weight, carcass yields (%) for breast, thigh, drumstick, and wing, and (3) the relative weights (%) of the digestive tract, heart, liver, gizzard, and intestine. In addition, we evaluated the cloacal and surface temperatures (°C), and subsequently, calculated the average and surface body temperatures. The treatment means were compared using the Student-Newman-Keuls test, with 5% level of significance. Compared with the acclimatized ambient environment, the natural environment more favored the performance of quails up to 28 days, but then affected it negatively from that age onward. Carcass yield, organs, and internal temperature of the quails maintained in the acclimatized and natural environments were not influenced. Universidade Federal do Maranhão, campus de Chapadinha-MA, no período de setembro a outubro de 2014. A partir do 14º dia de idade, 450 codornas de corte, não sexadas, com o peso inicial médio de 90,4 ± 12,9g, foram distribuídas em baterias, acondicionadas em sala climatizada e não climatizada, até o 42° dia. O delineamento experimental foi o inteiramente casualizado, com três tratamentos e seis repetições de 25 aves. Os tratamentos consistiram em: AC (Ambiente climatizado com temperatura de 26°C); AN (Ambiente natural) e ACCC (Ambiente climatizado com temperatura de 26°C com alimentação controlada para manter o mesmo consumo das aves mantidas no AN). Foi avaliado o consumo de ração, ganho de peso, conversão alimentar, peso vivo, eficiência energética para ganho de peso; o peso de carcaça, rendimentos (%) de carcaça, peito, coxa, sobrecoxa e asa; os pesos relativos (%) do trato digestório, coração, fígado, moela e intestino aos 28 e aos 42 dias. Também foram avaliadas as temperaturas (°C) cloacais e superficiais, e posteriormente, calculadas a superficial média e corporal média. As médias dos tratamentos foram comparadas pelo teste SNK considerando o nível de 5% de significância. O ambiente natural melhorou o desempenho das codornas até os 28 dias, prejudicando a...

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“…Several studies show similar results (Yahav et al, 2005, Dahlke et al, 2005Welker et al, 2008). Mello et al (2011) found that heat stress during rearing may increase the incidence of footpad dermatitis, increasing carcass downgrade rates due to footpad lesions.…”

Section: Incidence Of Pododermatitis In Broiler Reared Under Two Typementioning

confidence: 74%

Incidence of Pododermatitis in Broiler Reared under Two Types of Environment

Jacob

Baracho

Nääs

et al. 2016

Rev. Bras. Cienc. Avic.

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Housing environment is essential to achieve good broiler performance and to prevent diseases, including footpad dermatitis (FPD). The objective of this study was to determine the incidence of footpad dermatitis in broilers chickens according to housing type. The study was carried out with broilers reared for 5, 12, 19, 29 and 40 days. Four houses were used in this observational study. House 1 (A1) had positive pressure and reused litter; house 2 (A2) had positive pressure and new litter (sawdust); house 3 (A3) had positive pressure and new litter (rice husks); and house 4 (A4) had negative pressure and reused litter. During the entire experiment, air environmental and litter surface temperatures, and litter compaction were recorded. Pododermatitis was assessed by visual scoring of the footpads. Footpads were scored as function of the severity of the lesion. The comparison of means by the test of Bonferroni at 95% confidence interval showed higher incidence of footpad dermatitis in A3, probably due to the particle size of litter substrate. The lowest footpad dermatitis incidence was found in A1, with reused sawdust litter.

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Empenamento, níveis hormonais de triiodotironina e tiroxina e temperatura corporal de frangos de corte de diferentes genótipos criados em diferentes condições de temperatura

Cited by 20 publications

References 12 publications

Welfare of Broilers Ingesting a Pre-Slaughter Hydric Diet of Lemon Grass

Welfare of Broilers Ingesting a Pre-Slaughter Hydric Diet of Lemon Grass

Productive characteristics of meat quails reared in different environments

Incidence of Pododermatitis in Broiler Reared under Two Types of Environment

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