与 «PERCHERIES»相关的英语书籍
在以下的参考文献中发现
percheries的用法。与
percheries相关的书籍以及同一来源的简短摘要提供其在 英语文献中的使用情境。
1
Welfare of the Laying Hen
Percheries The perchery system was conceived in Scotland in the 1980s (Michie
and Wilson, 1984) and studied also in Germany (Rauch, 1991). It consisted of
several tiers of perches mounted on an A frame and had narrow slatted platforms
...
2
Let's Learn about Healthy Eating
Margaret Collins. Fact Sheet: Hens and Eggs Abridged from www.vegsoc.org/info
/laying.html There are over 33 million laying hens in the UK. About 85% are kept
in battery cages. Alternatives systems are percheries (aviaries) and free-range ...
3
The Encyclopedia of Applied Animal Behaviour and Welfare
Percheries Percheries use the vertical space in a house by having several rows
and tiers of perches arranged on frames (see Fig. L.2). There is some overlap in
terminology and design with aviaries. At each level, hens can access feed and ...
D. S. Mills, Jeremy N. Marchant-Forde, 2010
4
Domestic Animal Behaviour and Welfare
The numbers of broken bones from percheries and aviaries were much lower,
although hens from poorly designed or over—crowded percheries some— times
broke bones in the living conditions. The strength of the bones in wings and legs
...
Donald M. Broom, Andrew Ferguson Fraser, 2007
5
Encyclopedia of Animal Science (Print)
Group size is commonly about 1000 birds. The perchery provides perches on a
frame so that birds can jump up or down. Percheries that provide litter generally
have good results, but EU requirements for perchery eggs allow up to 21 birds
per ...
6
Busy Body: Eddathorpe Mystery #4
Eddathorpe Mystery #4 Raymond Flynn. news. 'No; you don't understand. The
remaining sheds are aviaries – percheries – now, we've changed over.' Very
good; they'd changed the image. Ratcatchers, as Angie would say, are now
rodent ...
7
Welfare of Production Animals: Assessment and Management of ...
FP can also be particularly problematic in alternative systems, such as percheries
and free range, because it is more difficult to control when birds are keptin large
flocks Broken bones are relatively common in laying hens and, according to ...
Frans J. M. Smulders, Bo Algers, 2009
8
Alternative Systems for Poultry: Health, Welfare and ...
demonstrated that at slaughter the incidence of recent fractures in end—of—lay
hens was reduced in percheries (10%) and for free range systems (14%)
compared with cage systems (31%). Sandilands et al . (2005) also demonstrated
that ...
Victoria Sandilands, Paul M. Hocking, 2012
9
The Welfare of Domestic Fowl and Other Captive Birds
... the centre of the shed on an area of plastic or mesh slats, leading down to litter
areas at the periphery of the house. They may contain extensive perches or
shelves, thus utilising the available vertical height of the house. Percheries
usually ...
Ian J. H. Duncan, Penny Hawkins, 2009
10
Second European Symposium on Poultry Welfare: Report of ...
DISCUSSION R. Harrison: It has ben stated that production costs for percheries
are 8% higher than for multi-bird battery cages. Why do retailers charge 40% for
eggs from percheries? Retailers seem to be cashing in on their customers' desire
...
