dr carley bailie & dr niamh o’connell - eaap · motivation to perch persists in fast growing...
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Dr Carley Bailie & Dr Niamh O’Connell [email protected] & [email protected]
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Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012)
Levels of perching behavior are generally low (eg. Le Van et al., 2000; Su et al., 2000; Pettit Riley and Estevez 2001)
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Step up perch
Swinging bar
Suspended platform
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Flat top ramp
Curved mesh ramp
A frame
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Farm 1 Timber framed house 1098m2
Initial stocking density: Cycle 1: 12birds/m2
Cycle 2: 17birds/m2
Farm 2 Steel framed house 1325m2
Initial stocking density: Cycle 1: 12birds/m2
Cycle 2: 17birds/m2
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Significant difference in the occupation of different perch designs Dz(1, n=1470)786.02, p<0.01)
b b
c c d
a
Rank
ed m
ean
% oc
cupa
ncy
scor
e
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Mea
n %
occu
panc
y sc
ore
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Mea
n %
occu
panc
y sc
ore
Stocking density
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Significant difference in the percentage occupancy of different component parts Dz(1, n=2714)1645.59, p<0.01).
c
a
b
Rank
ed m
ean
% oc
cupa
ncy
scor
e
Perch component
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Mea
n %
occu
panc
y sc
ore
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Mea
n %
occu
panc
y sc
ore
Stocking density
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Significant difference in the proportion of perching attempts that succeeded (Dz(1, n=241)32.93, p<0.01) for different perch designs
Rank
ed m
ean
% su
cces
sful
pe
rchi
ng a
ttem
pts
ab a a bc c a
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Component Degree of occupation
Platform Highest
Ramp Intermediate
Bar Lowest
Overall occupation
Component occupation
Successful and failed perching attempts
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Platforms may replace traditional perches
Guidelines for provision based on linear space allowances may become obsolete
Further studies must investigate effects on health and welfare
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Questions?