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首页> 外文期刊>Arquivo Brasileiro de Medicina Veterinaria e Zootecnia >Behaviour and growth performance of low-birth-weight piglets cross-fostered in multiparous sows with piglets of higher birth weights
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Behaviour and growth performance of low-birth-weight piglets cross-fostered in multiparous sows with piglets of higher birth weights

机译：低出生体重仔猪在多胎母猪与高出生体重仔猪交配时的行为和生长性能

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The aim of the study was to evaluate the behaviour, pre-weaning survival rate and growth performance of low birth weight (BW) piglets cross-fostered with piglets of higher weights. Piglets were transferred to 60 foster sows, and divided in three groups (G; n=20): G1- 12 low BW piglets (0.80 a?? 1.25kg); G2- six low BW piglets and six intermediate BW piglets (1.40 a?? 1.60kg), and G3- six low BW piglets and six high BW piglets (>1.70kg). For the analysis, groups G2 and G3 were subdivided in LG2 (six G2 light piglets); IG2 (six G2 intermediate piglets), LG3 (six G3 light piglets), and HG3 (six G3 heavy piglets). Behavioural observations were carried out on days 1, 2, 4 and 6 (visual direct observation) and on days 3 and 5 (video recording) after birth. The percentage of missed nursings was higher in LG3 piglets than in LG1, IG2 and HG3 piglets, on days 1 and 2. On day 4, light piglets (LG1, LG2 and LG3) missed more nursings than IG2 and HG3 piglets. On day 3, video recording showed a higher percentage of missed nursings in LG1, LG2, and LG3 piglets as compared to HG3 piglets. On day 1, the number of fights during nursing was higher in IG2 than in LG1 and LG3 piglets. Also on day 1, number of fights and percentage of piglets engaged in fights, during 15min after nursing, were higher in LG1, LG3 and HG3 than in LG2 piglets. More playful behaviours were observed on day 2 in IG2 and HG3 piglets compared to LG1, LG2 and LG3 piglets. Light piglets (LG1, LG2, and LG3) presented similar body weight on days 4, 8, 12 and 16 after birth, regardless of being mixed with piglets of higher weights or not; however, the survival rate until day 16 was most compromised in LG3 piglets compared to the other groups. Despite the lack of influence of littermates' weight on the growth of low BW piglets, their survival rate indicates that they should not be mixed with high BW piglets.
机译：该研究的目的是评估与高体重仔猪交叉培育的低出生体重仔猪的行为，断奶前存活率和生长性能。将仔猪转移到60只寄养母猪中，并分为三组（G; n = 20）：G1-2只低体重的仔猪（0.80a≤1.25kg）; G2-六个低体重的仔猪和六个中等体重的仔猪（1.40 a？1.60kg），和G3-六个低体重的仔猪和六个高体重的仔猪（> 1.70kg）。为了进行分析，将G2和G3组细分为LG2（6只G2轻仔猪）。 IG2（六个G2中间仔猪），LG3（六个G3轻仔猪）和HG3（六个G3重型仔猪）。在出生后的第1、2、4和6天（直接视觉观察）以及第3和5天（录像）进行行为观察。在第1天和第2天，LG3仔猪错过护理的百分比高于LG1，IG2和HG3仔猪。在第4天，轻仔猪（LG1，LG2和LG3）错过的护理比IG2和HG3仔猪更多。在第3天，与HG3仔猪相比，视频记录显示LG1，LG2和LG3仔猪错过护理的百分比更高。在第1天，IG2哺乳期间的战斗次数高于LG1和LG3仔猪。同样在第1天，LG1，LG3和HG3的战斗次数和参与战斗的仔猪百分比在LG1，LG3和HG3中高于LG2仔猪。与LG1，LG2和LG3仔猪相比，IG2和HG3仔猪在第2天观察到更多的嬉戏行为。轻仔猪（LG1，LG2和LG3）在出生后第4、8、12和16天体重相似，无论是否与体重较大的仔猪混合。然而，与其他组相比，LG3仔猪直到第16天的存活率受到最大的损害。尽管同窝仔体重对低体重的仔猪的生长没有影响，但它们的存活率表明它们不应与高体重的仔猪混合。

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