Modelling the dynamic activity of broiler chickens in response to step-wise changes in light intensity

Abstract Controlling activity in broiler chickens may provide an inexpensive tool with the potential to improve broiler welfare by reducing lameness, reducing injuries during catching as well as increasing synchronisation within the flock. Despite much attention, no method has so far been able to control activity in broilers successfully at production level. In this study we used dynamic mathematical modelling to predict how broilers transfer temporal step-wise variations in light intensity into activity responses. We carried out three experiments in order to assess the effects of age, sex and experience upon steady-state and dynamic responses of activity to step-wise variations in light intensity between 5 and 100 lx. Most of the dynamic responses followed first-order dynamics, suggesting that only one overall process is involved in transferring light input into activity. The broilers showed significantly higher activity during periods of 100 lx than 5 lx when intensity alternated. Activity decreased with age but not with experience of the light regimes. The broilers responded significantly faster to a step-up than to a step-down in light intensity. Overall, the results suggest that a combination of step-wise variations in light intensity and the dynamic data-based modelling technique could provide additional information on the ethological mechanisms controlling broiler activity. This is encouraging for predicting and controlling activity, which could improve the welfare of broiler chickens on the farm.

[1]  C. Ekstrand,et al.  Rearing conditions and foot-pad dermatitis in Swedish broiler chickens. , 1997, Preventive veterinary medicine.

[2]  P. Cherry,et al.  The effect of light on broiler growth , 1962 .

[3]  J. Faure,et al.  Typology of activity bouts and effect of fearfulness on behaviour in meat-type chickens , 2002, Behavioural Processes.

[4]  J. Hurnik,et al.  Locomotion of broiler chickens in floor pens. , 1990, Poultry Science.

[5]  I. Cuthill,et al.  Rapid behavioural adjustments to unfavourable light conditions in European starlings (Sturnus vulgaris) , 2002 .

[6]  R C Newberry,et al.  Influence of light intensity on behavior and performance of broiler chickens. , 1988, Poultry science.

[7]  R. C. Newberry.  Exploratory behaviour of young domestic fowl , 1999 .

[8]  P. Koene,et al.  Behaviour of fast- and slow growing broilers to 12 weeks of age and the physical consequences , 2003 .

[9]  Peter C. Young,et al.  Concise encyclopedia of environmental systems , 1993 .

[10]  R. C. Newberry,et al.  Effect of alternating lights and strain on behavior and leg disorders of roaster chickens. , 1985, Poultry science.

[11]  A. P. Preston,et al.  Time-budgeting in meat chickens grown commercially , 1988 .

[12]  H. Blokhuis,et al.  The effect of the stocking density on the behaviour of broilers , 1990 .

[13]  J. Faure,et al.  Influence of increased environmental complexity on leg condition, performance, and level of fearfulness in broilers. , 2002, Poultry science.

[14]  P Saevels,et al.  Modelling the static and dynamic responses of total heat production of broiler chickens to step changes in air temperature and light intensity , 2000, British poultry science.

[15]  M. Meyer,et al.  Reinforcement and activation of domestic chicks as a function of the intensity of light onset , 1969 .

[16]  Jean-Marie Aerts,et al.  Dynamic Data-based Modelling of Heat Production and Growth of Broiler Chickens: Development of an Integrated Management System , 2003 .

[17]  B. L. Nielsen,et al.  Effects of qualitative and quantitative feed restriction on the activity of broiler chickens , 2003 .

[18]  C. Phillips,et al.  The effects of color and intensity of light on behavior and leg disorders in broiler chickens. , 1997, Poultry science.

[19]  C. Savory,et al.  Feather pecking in groups of growing bantams in relation to floor litter substrate and plumage colour. , 1999, British poultry science.

[20]  Fred J. Taylor.  Principles of Signals and Systems , 1994 .

[21]  S. Kestin,et al.  Prevalence of leg weakness in broiler chickens and its relationship with genotype , 1992, Veterinary Record.

[22]  J. Faure,et al.  Sequential feeding can increase activity and improve gait score in meat-type chickens. , 2002, Poultry science.

[23]  V Goedseels,et al.  Image analysis to measure activity index of animals. , 2010, Equine veterinary journal. Supplement.

[24]  Peter C. Young,et al.  Recursive Estimation and Time Series Analysis , 1984 .

[25]  C. Leterrier,et al.  Sex differences in bone growth of broiler chickens. , 1996, Growth, development, and aging : GDA.

[26]  D. Huonnic,et al.  Influence of stocking density on some behavioural, physiological and productivity traits of broilers. , 1997, Veterinary research.

[27]  Allen R. Stubberud,et al.  Feedback And Control Systems , 2007 .

[28]  J. Thaxton,et al.  Stocking density effects on growth performance and processing yields of heavy broilers. , 2005, Poultry science.

[29]  F. Boshouwers,et al.  Artificial light sources and their influence on physical activity and energy expenditure of laying hens. , 1993, British poultry science.