The present study evaluated the duration of days of gestation (DG) and litter size (LS) in pigs of a seropositive central coast farm and seronegative central tropics farm to Porcine Reproductive and Respiratory Syndrome Virus (VPRRS) during the years 2015 and 2016. Sows from VPRRS-positive farm showed increased DGs and LSs decreased in VPRRS-positive farm compared to those from seronegative tropical farm in 2015. DGs from VPRRS-positive farm pigs were shorter in 2015 compared to 2016. The DG and the LS were not influenced by the time of artificial insemination. Lower DG with higher LS expresses normal reproductive performance and support the seronegative result to VPRRS in tropical farms. Increased LS in positive farm to VPRRS in 2016 with respect to 2015 suggests the development of physiological adaptive processes of sows induced by the presence of the disease due to immunoregulation. &...

El presente estudio evaluó la duración de los días de gestación (DG) y el tamaño de camada (TC) en marranas de granja de costa central seropositiva y granja de selva central seronegativa al Virus del Síndrome Reproductivo y Respiratorio Porcino (VPRRS) durante los años 2015 y 2016. Marranas de granja seropositiva a VPRRS muestran DG aumentados y TC disminuidos en granja seropositiva a VPRRS comparado con los de selva seronegativa en 2015. Los DG de marranas de granja seropositiva a VPRRS fueron de menor duración en 2015 en comparación con 2016. La DG y el TC no fueron influenciados por la época de inseminación artificial. Menor DG con mayor TC expresan el comportamiento reproductivo normal y respaldan el resultado seronegativo a VPRRS en granjas de selva. Mayor TC en granja positiva a VPRRS en 2016 con respecto a 2015 sugiere desarrollo de procesos adaptativos fisiológicos de...

El objetivo del estudio fue evaluar la presentación del Síndrome Reproductivo Respiratorio Porcino (PRRS) en el tiempo y determinar el efecto que produce sobre las características productivas y reproductivas. Se evaluó el comportamiento productivo de 210 marranas Camborough 22, que parieron entre 2013 y 2015 en una granja porcina de Lima, Perú. Las características evaluadas fueron el promedio semanal/camada de lechones nacidos (NT), total de lechones nacidos vivos (NV), total de lechones nacidos muertos (NM), peso vivo de los lechones nacidos (PVLN), total de lechones destetados (LD), peso vivo de lechones destetados (PVLD), mortalidad de lechones al destete (MLD), peso vivo de lechones a los 70 días (PVL70) y mortalidad de lechones a los 70 días (ML70). El incremento de los NM superior a los límites normales de las gráficas de control duró 13 semanas, evidenciándose a partir...

The aim of this study was to evaluate the presentation of Porcine Respiratory Reproductive Syndrome (PRRS) across the years and determine its effect on productive and reproductive parameters. The productive performance of 210 Camborough 22 sows that farrowed from 2013 to 2015 in a pig farm in Lima, Peru was evaluated. The characteristics under analysis were: mean litter size per week (NT), total piglets born alive (NV), total piglets born dead (NM), liveweight of piglets born (PVLN), total weaned piglets (LD), live weight of weaned piglets (PVLD), mortality of piglets at weaning (MLD), live weight of piglets at 70 days (PVL70) and mortality of piglets at 70 days (ML70). The increase of NM above the normal limits of control charts lasted 13 weeks. It was evident from week 95 (fourth week in October 2014) and continued through week 108 (second week in February 2015). In the year of present...

The aim of the study was to evaluate the effect of dietary supplementation of five levels of L-Met on the productive performance of growing Muscovy male ducks. Methionine supplementation contained 99% L-Met. Seventy-two ducks (0.66 ± 0.11 kg) of 22 days of age were used and randomly distributed into 5 treatments: 1) basal diet (BD) containing 0.5% Met + Cyst, without L-Met supplementation, 2) DB + 0.1% L-Met, 3) DB + 0.2% L-Met, 4) DB + 0.3% L-Met and 5) DB + 0.4% L-Met. Each replicate consisted of three birds. Statistical differences were found for feed intake (p=0.002) and fourth primary feather length (p<0.001), but no significant difference for body weight, total weight gain and feed conversion (p>0.05). Supplementation with 0.1-0.3% L-Met improved feed intake and feather length, with a tendency to improve body weight. Supplementation with 0.4% L-Met decreased feed intake. The...

This study evaluated the behaviour of the sow and her piglets, housed in two types of farrowing pens (n=3). Maternity pen built of noble material with cement feeder and nipple-type drinker with a crib that provided heating to the piglets with electric energy sources (Floor) and a cage-type farrowing pen (Cage) with functional ventilation with surface geothermal energy (heat exchange at 3 m depth) and solar panels that supply energy to the fans and the crib to provide heating. Video cameras recorded 24 h a day for 27 days (farrowing to weaning), to evaluate the body positions of the sow (lying down, standing, sitting) and the activity of the piglets (inside the crib, outside the crib suckling, and outside the crib not suckling). Sows in crates spent more time in the lying position (p<0.01) and less time in the standing (p<0.01) and sitting (p<0.01) positions compared to those in ...