O objetivo deste estudo foi determinar o efeito da inclusão de grãos de destilaria com solúveis em variáveis de desempenho e características de carcaça de suínos em crescimento e terminação por meio de uma meta-análise. A base de dados consistiu em 32 estudos presentes em 19 artigos, envolvendo 17.106 suínos. As características de carcaça incluídas foram peso de carcaça quente, rendimento de carcaça, espessura de toucinho, área de lombo, profundidade de lombo e rendimento de carne. Conversão alimentar foi a única variável que apresentou diferença para desempenho com à adição de DDGS, em relação ao controle, a estatística I2 para conversão alimentar foi de 48% (P= 0,001). Peso da carcaça quente, o rendimento da carcaça, área do lombo, espessura de toucinho e profundidade do músculo apresentaram diferença com a inclusão de grãos de destilaria com solúveis em relação ao controle. A inclusão de DDGS como substituto parcial do milho ou farelo de soja em dietas de suínos nas fases de crescimento e terminação interfere a conversão alimentar, peso de carcaça quente, rendimento de carcaça, espessura de toucinho, profundidade de músculo e área do lombo.

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This study evaluated the effect of different metabolizable energy (ME) levels in diets on digestibility, performance, and feeding behavior of weaned piglets. A digestibility study to determine ME levels was performed using 12 male piglets with 11.5 ± 0.5 kg body weight (BW), in a cross-over design fed with different ME levels (treatments). In the performance study were used 64 female piglets with 7.5 ± 0.8 kg BW, in a randomized block design with four treatments (3.30, 3.40, 3.50, and 3.60 Mcal.kg-1ME levels), and feeding program with three phases (pre-initial I, pre-initial II, and initial). For feeding behavior, four pens of each treatment were monitored with cameras. The crude-protein digestibility coefficient reduced as dietary ME level increased (P <0.05). In pre-initial I animal performance was not influenced (P <0.05) by ME diet levels, and in the pre-initial II and initial phases, increases in ME caused quadratic (r² 0.99) and linear (r² 0.99) effects on daily feed intake, respectively. When ME levels increased, feed conversion ratio decreased linearly in the pre-initial II phase (r² =0.98), and quadratically in the initial phase (r²= 0.99). The number and duration of feeder visits linearly decreased as the diet energy levels increased (P <0.05). Weaned piglets can regulate feed intake according to dietary ME levels. The performance of weaned piglets can be maintained using diets containing metabolizable energy levels between 3.30 at 3.60 Mcal.ME.kg-1 if the ratio of nutrients to energy is maintained constant.The feed intake behavior of weaned piglets is influenced  by increases in dietary metabolizable energy levels evaluated, resulting in fewer and shorter visits to the feeder.

Biometeorology and animal welfareFull-length research article Immunocastrated female pigs' social and feeding behaviour ABSTRACT -This study compared the social and feeding behaviour of immunocastrated female pigs using different immunocastration protocols. We used seventy-two gilts from industrial crossbreeding (Agroceres × Topigs) at 15 weeks of age. The pigs were distributed in a randomised design with three treatments. The second dose of the immunocastration vaccine was applied in two groups, six weeks before slaughter (I6) and four weeks before slaughter (I4). A non-immunised group (NI) was used for comparison. Due to the divergence in the time of immunisation between the two groups, an individual comparison of each immunocastrated group with the control group (NI vs. I6 and NI vs. I4) was performed. Social behaviour was analysed through the collection of images by a monitoring camera, and the analysis period was from 6:00 to 18:00 h, with behaviour observed every ten minutes. Feeding behaviour data were collected by the automated FIRE ® system. Anti-GnRH immunisation and the different protocols of application did not influence most social and feeding behaviours.

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