Influence of early qualitative feed restriction and environmental temperature on long bone development of broiler chickens

Bruno, Luís Daniel Giusti; Luquetti, B. C.; Furlan, Renato Luís; Macari, Marcos

doi:10.1016/j.jtherbio.2007.04.005

Cited by 22 publications

(16 citation statements)

References 20 publications

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“…Hormonal differences can account for the differences in the growth and bone strength between males and females (Rath et al 1999). Globally, femurs of both sexes observed in this trial were longer, thicker and heavier than those belonging to their commercial counterpart (Bruno et al 2007;Shahnazari et al 2007;Salaam et al 2016), with a superior bone strength than that of fast-growing meat-type hybrids (Rath et al 1999). A higher level of locomotory activity, which is a component of slow-growing behavioural patterns (Mench 1988), was demonstrated to strengthen bones and to reduce deformities (Reiter and Bessei 1998).…”

Section: Discussionmentioning

confidence: 72%

Productive performances and carcase quality of male and female Italian Padovana and Polverara slow-growing chicken breeds

Tasoniero

Cullere

Baldan³

et al. 2017

Italian Journal of Animal Science

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Live performances and carcase quality of Padovana (n ¼ 81) and Polverara (n ¼ 76) chickens were investigated considering breed, gender and their interaction (B Â G). Birds were reared until 183 d of age. After slaughter, yields were computed, and pH and L Ã a Ã b Ã colour values were measured on breast and leg meat. Breeds exhibited similar performances and yields, except a greater commercial carcase incidence for Polverara (p < .01). Breast meat quality was similar, except for higher L Ã value of Padovana fillets (p < .01). Polverara legs exhibited lower pH (p < .0001), lower L Ã value (p < .001) and higher a Ã value (p < .0001). Gender influenced performances and carcase quality traits. Males showed heavier live weight (p < .0001), carcase weight and cuts (p < .0001) and commercial carcase yield (p < .05), females displayed greater breast yield (p < .0001), whereas net carcase yield (% SW) was similar between sexes. Female fillets showed lower pH (p < .001) and higher L Ã and b Ã values (p < .0001); their legs had also higher L Ã and b Ã values (p < .0001). On the contrary, male legs were remarkably redder (p < .0001). Considering breast meat quality, B Â G interaction counterposed Polverara males and Polverara females, whereas the greatest differences in leg meat quality existed between Polverara males and Padovana females. This study revealed that the two breeds and genders possess peculiar quality traits. ARTICLE HISTORY

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Section: Discussionmentioning

confidence: 72%

Productive performances and carcase quality of male and female Italian Padovana and Polverara slow-growing chicken breeds

Tasoniero

Cullere

Baldan³

et al. 2017

Italian Journal of Animal Science

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“…The determining factor for the birds to move around depends on the genotype, nutrition and duration of food restriction (LEESON et al, 1995;MASSE et al, 2003; VAN DER EERDEN et al, 2003;BOKKERS & KOENE, 2004;BOKKERS et al, 2007;BRUNO et al, 2007) and the mechanical and chemical properties of the bones (JAMROZ et al, 2004). However, this study observed only the factors related to the age of the birds, the dietary supplementation of vitamin D, injuries resulting from age and accommodation, and mechanics of locomotion determined by gait score.…”

Section: Resultsmentioning

confidence: 99%

Using data mining to identify factors that influence the degree of leg injuries in broilers

Cordeiro¹,

Baracho

Nääs

et al. 2012

Eng. Agríc.

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Locomotor problems prevent the bird to move freely, jeopardizing the welfare and productivity, besides generating injuries on the legs of chickens. The objective of this study was to evaluate the influence of age, use of vitamin D, the asymmetry of limbs and gait score, the degree of leg injuries in broilers, using data mining. The analysis was performed on a data set obtained from a field experiment in which it was used two groups of birds with 30 birds each, a control group and one treated with vitamin D. It was evaluated the gait score, the asymmetry between the right and left toes, and the degree of leg injuries. The Weka ® software was used in data mining. In particular, C4.5 algorithm (also known as J48 in Weka environment) was used for the generation of a decision tree. The results showed that age is the factor that most influences the degree of leg injuries and that the data from assessments of gait score were not reliable to estimate leg weakness in broilers.KEYWORDS: decision tree, poultry, gait score. USO DE MINERAÇÃO DE DADOS PARA IDENTIFICAÇÃO DE FATORES QUE INFLUENCIAM O GRAU DE LESÕES DE PERNA EM FRANGOS DE CORTERESUMO: Problemas locomotores impedem a ave de se movimentar livremente, prejudicando o bem-estar e a produtividade, além de gerarem lesões nas pernas dos frangos. O objetivo deste trabalho foi avaliar a influência da idade, do uso de vitamina D, da assimetria de membros e do gait score, no grau de lesões de perna em frangos de corte, utilizando mineração de dados. A análise foi realizada em um conjunto de dados obtidos de um experimento de campo, em que foram utilizados dois grupos de aves com 30 aves cada, sendo um grupo-controle e outro tratado com vitamina D. Foram avaliados o gait score, a assimetria entre os dedos dos pés direito e esquerdo, e o grau de lesões de perna. O software Weka ® foi utilizado na mineração de dados. Em particular, o algoritmo C4.5 (também conhecido como J48 no ambiente Weka) foi utilizado para a geração de uma árvore de decisão. Os resultados mostraram que a idade é o fator que mais influencia o grau de lesões de perna e que os dados provenientes das avaliações de gait score não se mostraram confiáveis para estimar problemas locomotores em frangos de corte.

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“…It is reported in literature that locomotory problems are related to harsh rearing environments. Bruno et al (2007) found that broilers reared under heat stress presented reduced length and width of the tibia, femur and humerus. Light exposure is also another variable that is reported to influence broiler gait score results.…”

Section: Resultsmentioning

confidence: 97%

Field evaluation of broiler gait score using different sampling methods

Cordeiro

Nääs

Salgado

2009

Rev. Bras. Cienc. Avic.

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Brazil is today the world's largest broiler meat exporter; however, in order to keep this position, it must comply with welfare regulations while maintaining low production costs. Locomotion problems restrain bird movements, limiting their access to drinking and feeding equipment, and therefore their survival and productivity. The objective of this study was to evaluate locomotion deficiency in broiler chickens reared under stressful temperature conditions using three different sampling methods of birds from three different ages. The experiment consisted in determining the gait score of 28, 35, 42 and 49-day-old broilers using three different known gait scoring methods: M1, birds were randomly selected, enclosed in a circle, and then stimulated to walk out of the circle; M2, ten birds were randomly selected and gait scored; and M3, birds were randomly selected, enclosed in a circle, and then observed while walking away from the circle without stimulus to walking. Environmental temperature, relative humidity, and light intensity inside the poultry houses were recorded. No evidence of interaction between scoring method and age was found however, both method and age influenced gait score. Gait score was found to be lower at 28 days of age. The evaluation using the ten randomly selected birds within the house was the method that presented the less reliable results. Gait score results when birds were stimulated to walk were lower than when they were not simulated, independently of age. The gait scores obtained with the three tested methods and ages were higher than those considered acceptable. The highest frequency of normal gait score (0) represented 50% of the flock. These results may be related to heat stress during rearing. Average gait score incresead with average ambient temperature, relative humidity, and light intensity. The evaluation of gait score to detect locomotion problems of broilers under rearing conditions seems subjective and difficult to be properly performed.

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Influence of early qualitative feed restriction and environmental temperature on long bone development of broiler chickens

Cited by 22 publications

References 20 publications

Productive performances and carcase quality of male and female Italian Padovana and Polverara slow-growing chicken breeds

Productive performances and carcase quality of male and female Italian Padovana and Polverara slow-growing chicken breeds

Using data mining to identify factors that influence the degree of leg injuries in broilers

Field evaluation of broiler gait score using different sampling methods

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