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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Page 2: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

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)

Page 3: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

Step up perch

Swinging bar

Suspended platform

Page 4: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

Flat top ramp

Curved mesh ramp

A frame

Page 5: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

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

Page 6: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

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

Page 7: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

Mea

n %

occu

panc

y sc

ore

Page 8: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

Mea

n %

occu

panc

y sc

ore

Stocking density

Page 9: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

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

Page 10: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

Mea

n %

occu

panc

y sc

ore

Page 11: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

Mea

n %

occu

panc

y sc

ore

Stocking density

Page 12: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

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

Page 13: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

Component Degree of occupation

Platform Highest

Ramp Intermediate

Bar Lowest

Overall occupation

Component occupation

Successful and failed perching attempts

Page 14: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

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

Page 15: Dr Carley Bailie & Dr Niamh O’Connell - EAAP · Motivation to perch persists in fast growing commercial broiler chickens (eg Ventura et al., 2010; Ventura et al., 2012) Levels of

Questions?