20 research outputs found
Consequences of low electrical currents on the welfare of dairy cattle. Emphasis on individual variability
When heifers were exposed to an electrical current which voltage was increased daily, a short-term
persistent reaction threshold of 2.3 V (3.5 mA) was observed, despite a large individual variability.
In the medium-term, a multi-criteria experimental approach in dairy cows exposed to a permanent
(predictable) or random (unpredictable) voltage of 1.8 V (3.6 mA) on the water trough showed no
modification of the amount and composition of milk, although a transient acute stress response was
observed. Cows exposed permanently to the voltage became habituated to it, whereas those
exposed unpredictably may have shown signs of a mild chronic stress. The individual variability of the
cow resistance could explain the differences in behavioural responses. In farms, it is important to reduce
the presence of stray voltage, even of low level, as they may affect animal welfare.Lors de l’application d’une tension électrique augmentée progressivement chaque jour, un seuil de
réaction persistante de 2,3 V (3,5 mA) a été mis en évidence à court terme chez des génisses, malgré
une forte variabilité individuelle. À moyen terme, une analyse multicritère a montré que l’exposition
de vaches laitières, de manière permanente (prévisible) ou aléatoire (imprévisible), à une tension de
1,8 V (3,6 mA) au niveau de l’abreuvoir n’a pas modifié la quantité de lait produite ni sa composition,
bien qu’une réponse de stress aigu transitoire ait été observée. Les vaches exposées de manière
permanente se sont habituées, contrairement aux vaches exposées de manière imprévisible chez lesquelles
la présence d’un stress chronique modéré est envisagée. La variabilité individuelle de résistance
des vaches pourrait expliquer la variabilité des réponses comportementales. En élevage, il est
important de limiter la présence de tensions parasites, même de faible niveau, qui pourraient perturber
le bien-ĂŞtre des animaux
Modeling the Effect of Modified Atmospheres on Conidial Germination of Fungi from Dairy Foods
International audienc
Impact of temperature application and concentration of commercial sanitizers on inactivation of food-plant fungal spores
International audienc
Intraspecific variability in cardinal growth temperatures and water activities within a large diversity of Penicillium roqueforti strains
International audienc
Effects of disinfectants on inactivation of mold spores relevant to the food industry: a review
International audienc
Effect of concentrate percentage on ruminal pH and time-budget in dairy goats
International audienc
Modelling the effect of water activity reduction by sodium chloride or glycerol on conidial germination and radial growth of filamentous fungi encountered in dairy foods
International audienc
Impact of water activity on the radial growth of fungi in a dairy environment
International audienc
Impact of the physiological state of fungal spores on their inactivation by active chlorine and hydrogen peroxide
International audienc