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2015 ; 10
(4
): e0122841
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gab.com Text
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English Wikipedia
The effect of mixing entire male pigs prior to transport to slaughter on
behaviour, welfare and carcass lesions
#MMPMID25830336
van Staaveren N
; Teixeira DL
; Hanlon A
; Boyle LA
PLoS One
2015[]; 10
(4
): e0122841
PMID25830336
show ga
Research is needed to validate lesions recorded at meat inspection as indicators
of pig welfare on farm. The aims were to determine the influence of mixing pigs
on carcass lesions and to establish whether such lesions correlate with pig
behaviour and lesions scored on farm. Aggressive and mounting behaviour of pigs
in three single sex pens was recorded on Day -5, -2, and -1 relative to slaughter
(Day 0). On Day 0 pigs were randomly allocated to 3 treatments (n = 20/group)
over 5 replicates: males mixed with females (MF), males mixed with males (MM),
and males unmixed (MUM). Aggressive and mounting behaviours were recorded on Day
0 at holding on farm and lairage. Skin/tail lesions were scored according to
severity at the farm (Day -1), lairage, and on the carcass (Day 0). Effect of
treatment and time on behaviour and lesions were analysed by mixed models.
Spearman rank correlations between behaviour and lesion scores and between scores
recorded at different stages were determined. In general, MM performed more
aggressive behaviour (50.4 ± 10.72) than MUM (20.3 ± 9.55, P < 0.05) and more
mounting (30.9 ± 9.99) than MF (11.4 ± 3.76) and MUM (9.8 ± 3.74, P < 0.05). Skin
lesion scores increased between farm (Day -1) and lairage (P < 0.001), but this
tended to be significant only for MF and MM (P = 0.08). There was no effect of
treatment on carcass lesions and no associations were found with
fighting/mounting. Mixing entire males prior to slaughter stimulated mounting and
aggressive behaviour but did not influence carcass lesion scores. Carcass
skin/tail lesions scores were correlated with scores recorded on farm (rskin =
0.21 and rtail = 0.18, P < 0.01) suggesting that information recorded at meat
inspection could be used as indicators of pig welfare on farm.