Influence of mild feed restriction and mild reduction in dietary amino acid content on feeding behaviour of group-housed growing pigs

Carcò, Giuseppe; Bona, Mirco Dalla; Carraro, Luca; Latorre, Marcos; Fondevila, M.; Gallo, Luigi; Schiavon, Stefano

doi:10.1016/j.applanim.2017.09.020

Cited by 15 publications

(20 citation statements)

References 31 publications

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“…Readers are referred to Carcò et al [ 12 ] and Schiavon et al [ 17 ] for details on the effect of feed allowance and AA level on feeding behaviour, growth performance and carcass and meat quality.…”

Section: Resultsmentioning

confidence: 99%

“…#147683). The data were taken from a previous experiment aimed at investigating the influence of mild restrictions to the feed allowance and dietary amino acid content on the growth performance [ 17 ] and feeding behaviour of growing pigs [ 12 ].…”

Section: Methodsmentioning

confidence: 99%

“…Six behavioural traits were analysed from the data recorded by the feeding stations after excluding visits where feed consumption was zero ( Table 2 ). The main details are given in Carcò et al [ 12 ].…”

Section: Methodsmentioning

confidence: 99%

“…However, inconsistencies have been found in studies of the mutual influences among feeding behaviour, growth performance, and feed utilisation efficiency [ 3 ], which may be due to the very large variability among individuals with respect to these behavioural traits. In general, among-pig variation in behavioural traits is much greater than feed intake variation [ 12 ]. A useful way to interpret this huge variability is to consider feeding behaviour as a flexible strategy the pig follows to reach its desired feed intake when kept in a given social and productive environment [ 1 , 12 – 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…In general, among-pig variation in behavioural traits is much greater than feed intake variation [ 12 ]. A useful way to interpret this huge variability is to consider feeding behaviour as a flexible strategy the pig follows to reach its desired feed intake when kept in a given social and productive environment [ 1 , 12 – 14 ]. The desired feed intake, which is the amount of feed required for maintenance and growth, mainly depends on the pig’s genotype and physiological state [ 15 , 16 ], although nutrient imbalances [ 17 , 18 ], and climatic [ 19 , 20 ] and social [ 4 ] conditions may also influence the nutritional motivation of the pigs and their desired, and hence actual, feed intake.…”

Section: Introductionmentioning

confidence: 99%

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The influence of feeding behaviour on growth performance, carcass and meat characteristics of growing pigs

et al. 2018

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This study investigated the effect of the feeding behaviour on growth performance, and carcass and meat characteristics of 96 barrows fed ad libitum or restrictively with high or low amino acids (AA) diets according to a 2 × 2 factorial design. The feeding behaviour traits were measured with automated feeders. From 86 kg BW, half of the pigs were given feeds with high indispensable (AA) contents, while the other half received feeds with indispensable AA contents reduced by 9% in early finishing (86–118 kg BW) and by 18% in late finishing (118–145 kg BW). Body lipid and protein retentions were estimated from BW and backfat depth measures recorded at the beginning and end of each period. Pigs were slaughtered at 145 kg BW and carcass and meat quality data were recorded. Phenotypic correlations among feeding behaviours, growth performances, and carcass and meat traits were computed from all the data after adjustment for the effects of feeding treatments. As feeding rate was the behavioural trait most highly correlated with performance and carcass traits, the records of each pig were classified into feeding rate tertiles. Then, the data were statistically analysed using a mixed model, which included feed restriction (FR), AA reduction (AAR), the FR × AAR interaction and the feeding rate tertile as fixed factors, and pen as a random factor. Pigs eating faster (52.1 to 118.9 g/min) had significantly greater final body weights (16%), average daily weight gains (27%), estimated protein gains (22%), estimated lipid retention (46%), carcass weights (16%), weights of lean cuts (14%), weights of fat cuts (21%), proportions of fat in the carcass (14%), and 4% lower proportions of carcass lean cuts than pigs eating slowly (12.6 to 38.2 g/min). Manipulating the eating rate, through management or genetic strategies, could affect feed intake and subsequent growth performance, hence carcass quality, but have little influence on feed efficiency.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%