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

Cordeiro, Alexandra; Baracho, Marta dos Santos; Nääs, Irenilza de Alencar; Nascimento, Guilherme Rodrigues do

doi:10.1590/s0100-69162012000400003

Cited by 7 publications

(5 citation statements)

References 28 publications

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“…The incidence of almost all variables and specifically lame, immobile, sick, and terminally ill birds increased with age, as would otherwise be expected in commercial flocks given the fast growth rate of modern broilers and its implications on skeletal, cardiovascular, and immune development (Kestin et al., 1999; SCAHAW, 2000). Although leg problems may be affected by bird weight, deteriorated walking ability was previously reported to increase with age (Sorensen et al., 2000; Cordeiro et al., 2012), which is in agreement with our results. In addition, results of the correlation between welfare indicators and slaughter plant outcomes showed no relationship among the incidence of leg problems and body weight, at least for the data collected in this study.…”

Section: Discussionsupporting

confidence: 94%

The potential of the transect method for early detection of welfare problems in broiler chickens

2019

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The potential of the transect method was tested for early detection of welfare problems associated with bird age and genetic line, litter quality, and transect location. On-farm welfare impairment and its consequences on slaughter outcomes were evaluated to test the method's predictive ability. A total of 31 commercial Ross, Cobb, and mixed RC broiler flocks were evaluated at 3, 5, and 6 wk of age. Two observers evaluated 3 transects each, simultaneously and in the same house by detecting welfare indicators including lame, immobile, sick, small, dirty, tail wounds, other wounds (head and back wounds), featherless, terminally ill, and dead birds. Increasing lame, immobile, sick, and terminally ill birds according to bird age (P < 0.001) was detected. Higher incidences of small and sick birds were detected in C and RC (P < 0.001) as compared to R flocks, whereas more dead and tail wounded were observed in RC compared to R and C flocks at week 5 (P < 0.001). Dirty incidence increased as litter quality deteriorated (P < 0.001). A higher incidence of immobile, small, sick, dirty, and dead was registered near house walls (P < 0.001). Differences across observers were detected for lame, immobile, and terminally ill birds (P < 0.001). For the observer by bird age interaction, differences were detected for dirty, tail wounds, and other wounds (P < 0.05). Pearson correlations between welfare indicators at week 3 and those at final weeks of age (P < 0.05) ranged between r values of -0.2 and 0.654 (P < 0.05). Correlations between welfare indicators and slaughter outcomes showed a relationship between flock mortality and dead on arrival, footpad dermatitis, leg problems, and illness (P < 0.05). Litter quality positively correlated with downgrades (P < 0.001). This study showed the potential of transects to detect differences in welfare indicators according to factors that effects were previously reported. It demonstrated the transect potential for detecting and predicting the consequences of welfare impairment on slaughter outcomes. This would make the transect method a useful tool for notifying and rectifying welfare deterioration as early as at 3 wk of age.

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Section: Discussionsupporting

confidence: 94%

The potential of the transect method for early detection of welfare problems in broiler chickens

2019

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“…Arthritis can be caused by various viral (avian reovirus) or bacterial (E. coli and others) agents present on the farm (BRAGA et al, 2016;PALOMINO-TAPIA et al, 2018). Chickens with arthritis may have lameness, swelling of the tibiotarsal, radial, humeral and ulnar joints and locomotor problems that prevent them from reaching feeding troughs, causing a great impact due to reduced consumption and welfare (CORDEIRO et al, 2012). In general, the Ross 95 hybrid had the highest occurrence of arthritis and the other hybrid the lowest (Table 1).…”

Section: Hybridsmentioning

confidence: 99%

The effect of four commercial broiler hybrids and the season on occurrence of broiler condemnations in the abattoirs

et al. 2020

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Condemnations in the broilers abattoirs can represent an overview farms health and effectiveness of welfare programs, as well as predisposition between hybrids. The aim of this study was to investigate the prevalence of condemnation among four commercial broiler hybrids and the oscillation of condemnations in different seasons in a poultry abattoir. Data from condemnations of the Federal Inspection Service of a slaughterhouse were analyzed during one year, in which a total of 12.81% of partial condemnations were observed and total condemnations represented 0.41% of slaughtered broiler. There was a difference in total and partial condemnation among the hybrids evaluated, with Hubbard hybrid being the one with the highest number of condemnations (0.67% - 17.71%), followed by Ross 95 (0.42% - 14.21%), Cobb (0.30% - 10.03%); and Cobb Fast (0.26% - 9.29%). The analysis between the seasons showed a higher conviction rate in winter and a lower rate in autumn for both total and partial condemnation. Hubbard had the highest rates and Cobb Fast the lowest for most causes of condemnation. We concluded that the metabolic cause led to higher losses by total condemnation, while contamination or technopathies represented the highest rates in partial losses. The broiler hybrid and the time of year may influence the causes of condemnation in the abattoir. This information should be considered by the abattoir and the farms in sanitary planning, considering the financial impact due to losses by condemnations of carcasses.

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“…The gait score measure was widely adopted by importers, mainly European, in the evaluation of the broiler welfare. Specific importing markets have established that, in the gait score evaluation, lots that present 30% or more of broilers with a score equal to or greater than 1 are not able for the export/import market (Almeida Cordeiro et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

The Typology of Broiler House and the Impact in the Locomotion of Broilers

Garcia

Lima

Nääs³

et al. 2018

Eng. Agríc.

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The large majority of broiler houses use two types of systems: dark-house system-DHP, and tunnel with curtain system-ATC. The objective of the present study was to evaluate the association and the prevalence of locomotion issues in the broiler commercial farming systems (DHP and ATC). For assessing the thermal environment and the litter quality, a completely random design was adopted using two factors (broiler houses, DHP and ATC) with 12 repetitions. To study the surface temperature of the broiler breast, and the locomotion ability (gait score) a completely randomized design was adopted in a double factorial scheme 2 x 2 (two houses typology vs. sex) with 24 repetitions. To verify whether the type of house and the sex were associated to broiler locomotion problems due to the lack in walking ability, and the presence of medular compression (spondylolisthesis) the logistic regression was applied to the analysis: odds ratio and relative risk. The chance of the poultry to present inability of walking was 3.80 times higher in the male population. The risk factor associated with the lack of walking ability of the poultry was correlated to the tunnel house with curtains, presenting a relative risk 1.58 times higher when compared to the dark-house with walls. There was not the relative risk of medular compression (spondylolisthesis) neither was found an association between the poultry' sex and the type of house. The reduction in the male broiler locomotion ability might be associated with the rearing in the housing tunnel with curtains.

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

Cited by 7 publications

References 28 publications

The potential of the transect method for early detection of welfare problems in broiler chickens

The potential of the transect method for early detection of welfare problems in broiler chickens

The effect of four commercial broiler hybrids and the season on occurrence of broiler condemnations in the abattoirs

The Typology of Broiler House and the Impact in the Locomotion of Broilers

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