Chronic increase of dietary l-tryptophan decreases gentle feather pecking behaviour
نویسندگان
چکیده
منابع مشابه
Analysis of severe feather pecking behavior in a high feather pecking selection line.
Even though feather pecking (FP) in laying hens has been extensively studied, a good solution to prevent chickens from this behavior under commercial circumstances has not been found. Selection against FP behavior is possible, but for a more effective selection across different populations, it is necessary to characterize the genetic mechanism associated with this behavior. In this study, we us...
متن کاملBrain monoamine levels and behaviour of young and adult chickens genetically selected on feather pecking.
Severe feather pecking (SFP) in chickens is a detrimental behaviour with possibly neurochemical deficits at its base. Recent neurological studies depicted conflicting results on the role of serotonin (5-hydroxytryptamine, 5-HT) and dopamine (DA) in the development and display of feather pecking. We studied brain monoamine levels and behaviour in domestic chickens divergently genetically selecte...
متن کاملDivergent selection on feather pecking behaviour in laying hens (Gallus gallus domesticus).
A selection experiment was initiated in 1996 in which selection for (HP line) and against (LP line) feather pecking was performed. The foundation stock was a White Leghorn layer strain established in 1970 and maintained since then as a random bred control line at the Institute. Six hatches were produced over three generations. At the age of 68 weeks (generation 0, 1996), 35 weeks (generation 1,...
متن کاملRelationship between feather pecking and ground pecking in laying hens and the effect of group size.
The aim of this experiment was to study the relationship between feather pecking and ground pecking in laying hens and the effect of group size on feather pecking behaviour. Hisex White hens were kept in floor pens in group sizes of 15, 30, 60 and 120 birds, each with four replicates. Behavioural observations were performed at four different ages and focused on the number of feather pecks and a...
متن کاملFeather Pecking of Laying Hens in Different Stocking Density and Type of Cage
Both stocking rate and housing systems are main factors influencing the occurrence of feather pecking in laying hens raised in conventional cage system. This study examines the effects of different type of cage and stock density on feather pecking behaviour in hens. Total of 216 Hisex Brown hens at 16 weeks of age were randomly selected and put into 2 types of battery cages: conventional cages ...
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ژورنال
عنوان ژورنال: Applied Animal Behaviour Science
سال: 2004
ISSN: 0168-1591
DOI: 10.1016/j.applanim.2004.05.004