Andreas Briese

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The available floor space has a strong impact on the execution of various behaviours of laying hens. Presently, in Germany detailed requirements on the housing of pullets are insufficient. In order to get a first approximation, the floor space covered by pullets was determined by the colour contrast planimetric method KobaPlan. The measurements on standing(More)
Sufficient floor space is a fundamental precondition for poultry to perform normal behavioural patterns. To calculate and determine stocking densities, it is essential to know the absolute minimum surface area required by any given animal (body space). Additional space is required for characteristic behaviours (behavioural space) and for adequate(More)
The wild ancestors of the domestic pekin and muscovy ducks are anatomically, physiologically and behaviourally well adapted to living on and at the water. The domestic ducks kept for fattening purposes still show clear preferences for open water and make use of water for foraging and feeding, drinking, for general exploration, locomotion and preening, even(More)
Feather pecking and cannibalism are serious problems in keeping Moscovy ducks. Prevention of feather pecking by regularly applied beak and claw trimming are increasingly criticised by the public. The recommendation of the Council of Europe (COE) for the keeping of Muscovy ducks in farming systems calls for environmental enrichment including water for(More)
This literature review gives information about important behaviour categories of laying hens kept in aviary systems. Based on current knowledge, the differences in behaviour of hens in aviaries compared to the behaviour of hens living under "close to natural" conditions are assessed quantitatively and qualitatively. The focus of this first review is put on(More)
1. Laying hens in two aviary flocks of 1250 females and 12 males were investigated to determine if hens used the same roosting site more often than expected by chance and whether hens that roost next to each other for two consecutive nights (close groups) had fewer agonistic interactions than hens roosting far away from each other (distant groups) when put(More)
Space allowance for laying hens is one of the most disputed criteria of modern laying hen husbandry. Fast and cheap methods to achieve reliable data about the space occupied by laying hens are missing. This studie is based on a method, that can be used to measure the space ocupied by laying hens using digital images from above. 100 hens were photographed(More)
This literature review gives information about important behaviour patterns concerning feeding, reproduction and dust bathing of laying hens kept in aviary systems. The behaviour of hens in aviaries is compared to the behaviour of hens living under "close to natural" conditions. Feeding behaviour can be performed to a great extent in aviaries. The same is(More)
The influence of some thymic extracts TP1 and TP2 on the number of hemolytic plaque-forming cells (PFC) in the mouse spleen, on the titre of serum antibodies, S-typhy antiflagelar agglutinins and anti-influenza antibodies, was investigated. The results have shown that the hemolytic plaque-forming cells in the mouse spleen increase significantly, 2.3 times(More)
As of 1 September, 2001 existing legislation regulating outdoor dog husbandry is replaced by the domestic dog welfare directive of 2 May, 2001. The new directive applies to details of housing and breeding of dogs kept indoors and as domestic companions. Thus, minimum requirements for housing, care and feeding now apply to the great majority of private dog(More)