Accuracy of laying hens in jumping upwards and downwards between perches in different light environments

Moinard, C.; Statham, Poppy T E; Haskell, Marie J.; McCorquodale, C.; Jones, R. B.; Green, P.R.

doi:10.1016/j.applanim.2003.08.008

Cited by 40 publications

(38 citation statements)

References 27 publications

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“…Looking at the light intensities of these 4 flocks, the flocks with the higher light intensities have less severe keel bone damage, which is in compliance with the literature (Moinard et al 2004).…”

Section: Methods Descriptionsupporting

confidence: 87%

“…Although from the work of Moinard et al (2004) a relation between keel bone damage and aisle width or light intensity could be expected, this didn't come out of our research. This may have been caused by the limited number of flocks and the large variation in lay-out of systems.…”

Section: Inter-observer Reliabilitymentioning

confidence: 84%

“…Also, light intensity can influence the number of collisions with perches (Moinard et al 2004). In Table 3.15 the smallest and largest width of aisles of the aviaries are given as well as the light intensity.…”

Section: Methods Descriptionmentioning

confidence: 99%

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Modules for Welfare Quality® laying hen protocol

Niekerk

Gunnink

Wijhe-Kiezebrink

et al. 2018

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Summary UK To get more information out of the Welfare Quality assessment, three modules are developed, to get more detailed information on three aspects. These detailed scores fit on the original WQ-scores, so that the overall welfare assessment according to the WQ-methodology can be done.Two modules (keel bones and beaks) had a good repeatability and provided useful information. The module for subtle feather damage was not further developed, because this damage didn't appear to have much relation with feather pecking and the actual causes of this damage were unclear.

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Section: Methods Descriptionsupporting

confidence: 87%

Section: Inter-observer Reliabilitymentioning

confidence: 84%

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Modules for Welfare Quality® laying hen protocol

Niekerk

Gunnink

Wijhe-Kiezebrink

et al. 2018

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“…Given that keel bone fractures are believed to be painful (Nasr et al, 2012a) and associated with reduced egg production (Nasr et al, 2012b) and increased mortality (McCoy et al, 1996), keel bone damage is one of the major welfare problems associated with laying hens in aviaries. Falls and high energy collisions with internal structures that occur as birds move between tiers or perches are likely to be one of the major sources for the high prevalence of keel bone damage in aviaries (Gregory and Wilkins, 1996;Moinard et al, 2004). Indeed, frequent falls and collisions were observed in a commercial aviary system, especially during the beginning of the dark period (Stratmann et al, accepted).…”

Section: Introductionmentioning

confidence: 99%

Modification of aviary design reduces incidence of falls, collisions and keel bone damage in laying hens

Stratmann

Fröhlich

Gebhardt-Henrich

et al. 2015

Applied Animal Behaviour Science

104

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“…As an example, the latency to jump and the number of vocalisations were significantly higher at lower light intensity when hens have to jump from one perch to another. On the other hand, Moinard et al (2004) did not show any effect of lighting conditions (5, 10 or 20 lx; incandescent or high-or low-frequency fluorescence) on hens' ability to jump to and from perches in different light environments. These differences can be explained by the fact that lower light intensity in the Moinard et al study (5 lx) was higher than the low light intensity of Taylor et al (2003) (0.8 lx).…”

Section: Lightingmentioning

confidence: 59%

Scientific Opinion on welfare aspects of the use of perches for laying hens

2015

EFS2

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This opinion investigated the use of perches for laying hens in cage and non-cage systems. It is based on various activities reviewing the effects of perch height and design on hen health and welfare. Systematic and extensive literature reviews were conducted to assess the scientific evidence about hen motivation to grasp and seek elevation, and the appropriate height of perches as well as other features (position, material, colour, temperature, shape, width and length). In addition, an expert knowledge elicitation (EKE) exercise was run with technical hearing experts to discuss and prioritise the various design aspects of perches. Overall, the body of literature on perches is limited. Relevant features of perches are often confounded with others. In the literature, the most commonly used animal-based measures to assess perch adequacy are keel bone damages, foot pad lesions and perch use by hens. Overall, hens seek elevation during the day as well as during the night, when they select a site for roosting. Elevated perches allow hens to monitor the environment, to escape from other hens, avoid disturbances and improve thermoregulation. For night-time roosting hens show a preference for perches higher than 60cm compared with lower perches. However, elevated perches can have negative consequences with increased prevalence of keel deformities and fractures. The risk of injury increases when hens have to jump a distance of more than 80cm vertically, horizontally or diagonally to reach or leave a perch, or jump an angle between 45 and 90° (measured at the horizontal plane). Material, shape, length and width of the perch also influence perch preference by hens. The EKE exercise suggests that an adequate perch is elevated, accessible and functional (providing sufficient overview). The opinion concludes that for the design of an adequate perch, different features of perches need to be further investigated and integrated.

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Accuracy of laying hens in jumping upwards and downwards between perches in different light environments

Cited by 40 publications

References 27 publications

Modules for Welfare Quality® laying hen protocol

Modules for Welfare Quality® laying hen protocol

Modification of aviary design reduces incidence of falls, collisions and keel bone damage in laying hens

Scientific Opinion on welfare aspects of the use of perches for laying hens

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