Effects of allometric space allowance and weight group composition on grower-finisher pigs

Anil, Leena; Anil, Sukumarannair; Deen, John

doi:10.4141/a06-051

Cited by 30 publications

(49 citation statements)

References 49 publications

(53 reference statements)

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“…results in increased incidence of abnormal behavior, including nosing, aggressions and tail biting (Anil et al, 2007).…”

mentioning

confidence: 99%

Effect of gender, housing density and the interaction on growth performance and carcass and meat quality of pigs slaughtered at 110 kg body weight

Serrano¹,

Cámara²,

Morales³

et al. 2012

Span. j. agric. res.

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A total of 228 crossbred pigs were used to investigate the effect of gender (gilts and barrows), density at housing (0.84 and 0.76 m2/pig) and the interaction on growth performance and carcass and merit from 19.4 to 110 kg body weight. Feed intake of gilts increased as the space allowance decreased but no effect was observed in barrows (p<0.05 for the interaction). However, no interaction was observed for average daily gain or feed-to-gain ratio. Barrows had 2.4% less (p<0.01) carcass lean percentage but 9% more (p<0.05) intramuscular fat content than gilts. The concentration of linoleic acid in the outer layer of backfat was higher (p<0.05) for gilts than for barrows when pigs were allocated at 0.84 m2/pig, but no differences were observed at 0.76 m2/pig. Also, barrows had 2.7% more (p<0.05) total saturated fatty acids (SFA) in the outer layer of backfat and lower monounsaturated fatty acids (MUFA) (p<0.01) and linoleic acid (p<0.05) content in the inner layer than gilts. Housing density did not affect any of the carcass quality traits studied but an increase in space allowance decreased (p<0.05) MUFA content in both layers. Pigs allocated at 0.84 m2/pig tended (p<0.10) to have higher SFA content in the inner layer than pigs allocated at 0.76 m2/pig. We concluded that gilts and barrows respond differently to space allocation in respect to feed intake and unsaturation of backfat. Housing density did not affect growth performance of pigs slaughtered at 110 kg but MUFA content decreased with increases in space allowance.

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“…results in increased incidence of abnormal behavior, including nosing, aggressions and tail biting (Anil et al, 2007).…”

mentioning

confidence: 99%

Effect of gender, housing density and the interaction on growth performance and carcass and meat quality of pigs slaughtered at 110 kg body weight

Serrano¹,

Cámara²,

Morales³

et al. 2012

Span. j. agric. res.

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“…Resting behaviour appears to be strongly related to space allowance, with different studies covering this issue during recent years (Anil et al, 2007a;Scott et al, 2007a;Street and Gonyou, 2008;Hötzel et al, 2009;Li and Johnston, 2009). Allometric principles show increasing evidence of their suitability when calculating the spatial needs of pigs according to their behaviour ).…”

Section: Ability To Rest and Sleep (C73)mentioning

confidence: 99%

“…) Recent studies suggest that increasing space allowance may be a successful means of reducing the prevalence of aggressive behaviours among finishing pigs. Anil et al (2007a) showed that, for k values ranging between 0.027 and 0.037 at BW = 116 kg, increasing space allowance reduced the number of aggressive interactions and the total injury scores in growing-finishing pigs housed on slatted floors. Similarly, Liorancas et al (2006) comparing different space allowances in growingfinishing pigs found that the pigs were more inactive and spent more time fighting and biting when housed in pens with a k value of 0.021, at the moment of slaughter, compared to k=0.050.…”

Section: 42mentioning

confidence: 99%

“…) Several studies published recently indicate that increased space allowance results in better productivity parameters. Anil et al (2007a) investigated growth rate in finishing barrows (final BW about 116 kg) housed on fully slatted floors and found that space allowances corresponding to k values of 0.037 and 0.034 (0.88 and 0.81 m 2 ) were significantly better than 0.027 (0.64 m 2 ). Rossi et al (2008) examined the performance of heavy growing pigs taken to 156 kg body weight with 1.0 or 1.4 m 2 /pig and kept on solid floors, 20% slatted or totally slatted flooring.…”

Section: 42mentioning

confidence: 99%

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Preparatory work for the future development of animal based measures for assessing the welfare of pig ‐ Report 2: Preparatory work for the future development of animal based measures for assessing the welfare of weaned, growing and fattening pigs including aspects related to space allowance, floor types, tail biting and need for tail docking

Spoolder

Bracke

Mueller-Graf

et al. 2011

EFSA Supporting Publications

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“…Overcrowding may suppress pigs’ biological functioning (e.g., normal growth) and expression of natural behaviours [9, 10]. Obstruction in expression of pigs’ natural behaviours (e.g., exploration or chewing of objects) may trigger tail-biting, ear-chewing, aggression, and fighting [11, 12]. In addition to overcrowding, restricting vehicles into movement restriction areas may interrupt feed supply for swine premises, which can have an immediate impact on the well-being of pigs [13, 14].…”

Section: Introductionmentioning

confidence: 99%

Estimating the scale of adverse animal welfare consequences of movement restriction and mitigation strategies in a classical swine fever outbreak

Yadav

Weng

2017

BMC Vet Res

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BackgroundThe study aim was to quantify the impact of movement restriction on the well-being of pigs and the associated mitigation responses during a classical swine fever (CSF) outbreak. We developed a stochastic risk assessment model and incorporated Indiana swine industry statistics to estimate the timing and number of swine premises that would encounter overcrowding or feed interruption resulting from movement restriction. Our model also quantified the amount of on-farm euthanasia and movement of pigs to slaughter plants required to alleviate those conditions. We simulated various single-site (i.e., an outbreak initiated from one location) and multiple-site (i.e., an outbreak initiated from more than one location) outbreak scenarios in Indiana to estimate outputs.ResultsThe study estimated that 14% of the swine premises in Indiana would encounter overcrowding or feed interruption due to movement restriction implemented during a CSF outbreak. The number of premises that would experience animal welfare conditions was about 2.5 fold of the number of infected premises. On-farm euthanasia needed to be performed on 33% of those swine premises to alleviate adverse animal welfare conditions, and more than 90% of on-farm euthanasia had to be carried out within 2 weeks after the implementation of movement restriction. Conversely, movement of pigs to slaughter plants could alleviate 67% of adverse animal welfare conditions due to movement restriction, and only less than 1% of movement of pigs to slaughter plants had to be initiated in the first 2 weeks of movement restrictions. The risk of secondary outbreaks due to movement of pigs from movement restriction areas to slaughter plants was low and only seven pigs from each shipment needed to be tested for CSF infection to prevent a secondary outbreak.ConclusionsWe found that the scale of adverse animal welfare consequences of movement restriction during a CSF outbreak in Indiana was substantial, and controlled movement of pigs to slaughter plants was an efficient and low-risk alternative mitigation response to on-farm euthanasia. The output estimates generated from this study provide empirical evidence for decision makers to properly incorporate required resources for mitigating adverse animal welfare conditions in CSF outbreak management strategic planning.

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Effects of allometric space allowance and weight group composition on grower-finisher pigs

Cited by 30 publications

References 49 publications

Effect of gender, housing density and the interaction on growth performance and carcass and meat quality of pigs slaughtered at 110 kg body weight

Effect of gender, housing density and the interaction on growth performance and carcass and meat quality of pigs slaughtered at 110 kg body weight

Estimating the scale of adverse animal welfare consequences of movement restriction and mitigation strategies in a classical swine fever outbreak

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