Dorothée Bizeray-Filoche

• Assistant Professor
• Professor at UniLaSalle

Ce volume regroupe les textes issus du programme Casdar "Innovation et Partenariat" et "Recherche finalisée et innovation" de 2013. Le colloque de restitution s’est déroulé le 6 février 2019 sous l’égide du GIS Relance Agronomique

Animals spend during the day an important part of their time lying, walking or standing. In a natural environment often more or less elastic ground surfaces such as pasture or sand are found. However, farmed species spend often the major part of their life inside a building on floors with hard surfaces for walking and standing, or when the floor is...

Automatic milking devices are an equipment in increasing use among farmers, for they reduce their obligations and improve their working conditions. They are generally accompanied by a change in the system of livestock husbandry, and the grazing of dairy cows is often questioned. A trial lasting 7 weeks compared the performances and the behaviour of...

Piglet crushing remains a major problem in pig production and is partly related to sow behavioural traits. The sows’ responses to the presence of humans around farrowing could partly contribute to piglet crushing through increased reactivity and getting up and lying down behaviour. The aim of the study was to determine if the sows’ behaviour observ...

Piglet crushing remains a major problem in pig production. Reduced crushing might be obtained through genetic selection on sow behavioural traits. The aim of the study was to assess the relationship between behavioural responses at 6 months of age, around farrowing, and sows' reproductive performance including crushing levels. At 6 months of age, b...

Feeding broilers by alternating different diets for 1 or 2 days is known as sequential feeding, and it possibly reduces leg problems since it slows down early growth and may enhance general activity. The present study compared continuous feeding with a standard diet (C: metabolisable energy = 12.55 MJ/kg, crude protein = 190 g/kg) with alternations...

Le développement intensif de la production porcine découle d’une meilleure maîtrise de l’environnement des animaux, d’une prophylaxie des maladies infectieuses, d’une alimentation au plus près des besoins nutritionnels des porcs et d’une sélection génétique orientée vers des performances de croissance et de reproduction optimales. Parallèlement, ce...

The current intensive system of pig production is the outcome of better control of the environment, prevention of infectious disease, a feeding strategy adapted to the nutritional needs of pigs, and genetic selection oriented towards increased growth and reproductive performances. Meanwhile, certain practices have been shown to be detrimental to pi...

La fréquence élevée de troubles locomoteurs d’origine multifactorielle pose un important problème de santé dans les élevages commerciaux de poulets de chair à croissance rapide. La forte incidence de ces anomalies de la démarche est en partie due à un manque d’activité physique. Plusieurs facteurs ont un effet sur l’activité des animaux. Le poids i...

Fast-growing broiler chickens use pen-space heterogeneously and have low activity levels, related in part to leg problems. The aim of this study was to test the effects of the addition of string and sand trays to rearing pens on the use of space, levels of activity and leg problems. Broiler chickens were reared in 12 pens (40 birds per pen). Drinke...

Leg problems in fast-growing chickens (broilers) are a major health problem in commercial conditions. They seem partly due to lack of physical exercise. Several factors can modify broiler activity. Early body weight is negatively correlated with level of activity: the lighter the birds are, the more active they are. Increasing environmental complex...

This study investigated the short- and long-term effects of sequential feeding by alternating low-and high-lysine diets during the day on growth, gait score (GS), and behavior in broilers. From Days 2 to 12, 6 pens of 10 birds were assigned to control treatment and fed a standard normal lysine diet (NL) (ME = 3,250 kcal/kg, CP = 23%, Lys = 1.19%) a...

Increasing the level of physical exercise in broilers has been indicated to improve leg condition. We attempted to stimulate locomotor and foraging activities by adding environmental complexity to experimental broiler pens. We hypothesised that adding barriers between food and water, and stimulating foraging behaviour would increase level of physic...

We hypothesized that increased distance between resources and stimulation of foraging behavior, through altering the degree of environmental complexity by using moving lights and scattering whole wheat in the litter, would improve physical activity of broiler chickens. Increased activity may potentially improve leg condition and performance and dec...

The aim of this study was to determine whether the presence of a maternal hen influences the quality, quantity, and distribution of activity in young chicks. Brooded and nonbrooded chicks were observed during the entire light phase when they were 4 d of age. Our results revealed that although both brooded and nonbrooded chicks expressed the same be...

Increased physical exercise is known to prevent leg problems in meat-type chickens. Our aims were to study in detail the organisation of general and locomotor activity, to determine how physical exercise could be promoted and to investigate the effects of tonic immobility (TI) duration on spontaneous activity. Chicks were allocated to two groups ac...

*INRA, Station de Recherche Avicole, 37380 Nouzilly Diffusion du document : INRA, Station de Recherche Avicole, 37380 Nouzilly Diplôme : Dr. d'Université

Reduction in exercise increases the occurrence of lameness in meat-type chickens. Locomotor activity is dramatically reduced during the finishing period in chickens from fast-growing genetic types compared to slow-growing genetic types, but it is not known whether this difference is already present during the starting period and may be influenced b...

Observer le comportement des truies pendant les manipulations pour identifier celles qui risquent d'écraser leurs porcelets L'objectif de ce travail était de proposer des méthodes d'observation validées, faciles à réaliser pendant les activités cou-rantes d'élevage sur un grand nombre d'animaux, et qui identifient les truies risquant d'écraser leur...