The purpose of the study was to evaluate the effect of yacon meal as a prebiotic in rations for Muscovy ducks. One hundred and fifty male ducks of seven weeks of age were used. The ducks were grouped in five treatments: T0, control (without yacon and antibiotic); T1, zinc bacitracin 0.035%; T2, T3 and T4, yacon meal at 0.25, 0.50 and 0.75% respectively. Treatments T1, T2 and T4 resulted in higher body weight gain as compared to T0 (p<0.05). No differences were observed between treated groups and T0 on feed consumption. Feed conversion index was significantly better in T1, T3 and T4 as compared to T0 (p<0.05). The cost of feed per unit of body weight gain was lower in T1, T2, T3 and T4 as compared to T0. The inclusion of 0.75% of yacon meal in the diet would be an alternative to the use of antibiotics in rations of ducks during the fattening phase.

The aim of this study was to determine the effect of spirulina (Arthrospira platensis) on productive performance (WG: weight gain, FI: feed intake, FCR: feed conversion ratio, EPEI: European productive efficiency index) and intestinal morphometry (VL: villus length,  VW: villus width, CD: crypt depth) in broilers. In total, 240 one-day-old male chicks from the Cobb 500 line were used, distributed into four treatments with six replicates of 10 chicks each. The treatments were: T0: base diet without spirulina (control), T1: base diet with 0.25% spirulina, T2: base diet with 0.5% spirulina, T3: base diet with 1% spirulina. A completely randomized block design was used. The effect of increasing levels of spirulina was evaluated by linear and quadratic polynomial orthogonal contrasts. The WG and FI variables showed quadratic trend while FCR and EPEI showed linear trend. The optimal level of ...

The purpose of the study was to evaluate the effect of yacon meal as a prebiotic in rations for Muscovy ducks. One hundred and fifty male ducks of seven weeks of age were used. The ducks were grouped in five treatments: T0, control (without yacon and antibiotic); T1, zinc bacitracin 0.035%; T2, T3 and T4, yacon meal at 0.25, 0.50 and 0.75% respectively. Treatments T1, T2 and T4 resulted in higher body weight gain as compared to T0 (p<0.05). No differences were observed between treated groups and T0 on feed consumption. Feed conversion index was significantly better in T1, T3 and T4 as compared to T0 (p<0.05). The cost of feed per unit of body weight gain was lower in T1, T2, T3 and T4 as compared to T0. The inclusion of 0.75% of yacon meal in the diet would be an alternative to the use of antibiotics in rations of ducks during the fattening phase.

The objective of this study was to determine the productive parameters of guinea pigs of the G lineage at the level of the central coast of Peru. Information on productive data was collected from 180 parturitions of 39 breeding guinea pigs and 452 weaned individuals at 16.3 days between April 2016 and May 2017 from the Huaral experimental station of the IVITA Research Centre of the National University of San Marcos. The number of births (NN), number of live births (NNV), body weight at birth (PCrN), litter weight at birth (PCN), number of weaned animals (ND), body weight at weaning (PcrD), litter weight at weaning (PCD) and mortality rate (M). The results were: NN 2.82 ± 1.14 pups per parturition (1-5 pups), NNV 2.80 ± 1.13 pups, PCrN 139.3 ± 30.9 g, PCN 389.6 ± 121.3 g, ND 2.58 ± 1.02 pups, PCrD 248.0 ± 62.3 g, PCD 640.6 ± 211.9 g and M 8.89%. Only PCrD showed significant differe...

The aim of this study was to compare the productive performance of two guinea pig meat lines (Cavia porcellus) reared in the central coast of Peru. Two genetic lines of guinea pigs were used during the growth and fattening stage: a group of 20 male guinea pig, progeny of improved guinea pigs in the Peruvian highlands, meat line G, and another group of 20 improved male guinea pigs in the Peruvian coast, meat line H. The guinea pigs were reared in individual cages from weaning (15 ± 2 days) until week 11, receiving the same diet based on Zea mays var. indurata, wheat bran and fresh water. The birth weight for guinea pigs G and H was 146.5 ± 28.2 and 119.0 ± 19.2 g, respectively, the weaning weight was 306.5 ± 49.1 and 227.0 ± 58.2, respectively, and the weight at week 11 was 965.5 ± 100.2 and 868.0 ± 91.6, respectively (p<0.05 in all cases). No significant difference was found in...

El objetivo de la investigación fue determinar los parámetros productivos de cuyes G a nivel de la costa central del Perú. Se recolectó información de datos productivos de 180 partos de 39 cuyes G reproductoras con 452 crías destetadas a los 16.26 días en promedio entre abril de 2016 y mayo de 2017 en la estación experimental de Huaral del C.I. IVITA de la Universidad Nacional Mayor de San Marcos. Se evaluó el número de nacidos (NN), números de nacidos vivos (NNV), peso de las crías al nacimiento (PCrN), peso de la camada al nacimiento (PCN), número de destetados (ND), peso de las crías al destete (PcrD), peso de la camada al destete (PCD) y tasa de mortalidad (M). Los resultados fueron: NN de 2.82 ± 1.14 crías por parto (1-5 crías), NNV de 2.80 ± 1.13 crías, PCrN de 139.3 ± 30.9 g, PCN de 389.6 ± 121.3 g, ND de 2.58 ± 1.02 crías, PCrD de 248.0 ± 62.3 g, PCD de 64...

The aim of this study was to compare the productive performance of two guinea pig meat lines (Cavia porcellus) reared in the central coast of Peru. Two genetic lines of guinea pigs were used during the growth and fattening stage: a group of 20 male guinea pig, progeny of improved guinea pigs in the Peruvian highlands, meat line G, and another group of 20 improved male guinea pigs in the Peruvian coast, meat line H. The guinea pigs were reared in individual cages from weaning (15 ± 2 days) until week 11, receiving the same diet based on Zea mays var. indurata, wheat bran and fresh water. The birth weight for guinea pigs G and H was 146.5 ± 28.2 and 119.0 ± 19.2 g, respectively, the weaning weight was 306.5 ± 49.1 and 227.0 ± 58.2, respectively, and the weight at week 11 was 965.5 ± 100.2 and 868.0 ± 91.6, respectively (p<0.05 in all cases). No significant difference was found in...

The dry matter (DM) production of alfalfa (Medicago sativa), Caraveli variety, was evaluated per cut and per year, and its persistence over time in a prairie of the IVITA-Huaral Station of the Faculty of Veterinary Medicine, San Marcos University (Lima, Peru). The pasture was installed in the spring of 2011 in 1 ha of land in beds of 3 x 40 m, using the method of hand sowing (35 kg/ha). Irrigation was performed periodically. The cultivation was grazed with dairy cows, from the third cut when it presented 10% flowering. A total of 28 cuts were done between December 2011 and November 2014. The DM in the first, second and third year had a mean per cut of 373.3, 395.0 and 409.6 g/m2, respectively (p<0.05). The number of plants per area decreased significantly within year (p<0.05), without affecting the production of dry matter.

The dry matter (DM) production of alfalfa (Medicago sativa), Caraveli variety, was evaluated per cut and per year, and its persistence over time in a prairie of the IVITA-Huaral Station of the Faculty of Veterinary Medicine, San Marcos University (Lima, Peru). The pasture was installed in the spring of 2011 in 1 ha of land in beds of 3 x 40 m, using the method of hand sowing (35 kg/ha). Irrigation was performed periodically. The cultivation was grazed with dairy cows, from the third cut when it presented 10% flowering. A total of 28 cuts were done between December 2011 and November 2014. The DM in the first, second and third year had a mean per cut of 373.3, 395.0 and 409.6 g/m2, respectively (p<0.05). The number of plants per area decreased significantly within year (p<0.05), without affecting the production of dry matter.

The study aimed to compare the body weight, and cardiac indices, hematocrit and hemoglobin as indicators of cardiac activity of two turkey commercial lines reared at sea level. Thirty five turkeys from each line were used in the study. Body weight (PC) was recorded from the 4th to the 14th week of age where birds were slaughtered. There, blood samples were collected for measuring hematocrit and hemoglobin levels. Also, hearts were collected to determine the following ratios: weight of right ventricle/total ventricle (VD/VT), weight of left ventricle/total ventricle (VI/VT), weight of left ventricle + septum/ total ventricle (VI+S/VT), VI/PC, VD/PC, VI+S/PC, and VT/PC. Body weight and haemoglobin in BUT turkeys were higher (p<0.05) and hematocrit was higher (p<0.05) in Hybrid turkeys. No statistical differences were found on VD/VT, VI/VT, (VI+S)/VT, and VD/PC between lines, but high...

The aim of this study was to evaluate the productive performance of laying quails (Coturnix coturnix japonica). The study was carried out at the poultry farm of the La Molina National Agrarian University in Lima, Peru. In total, 1296 quail distributed in 96 females and 48 males of three ages (45, 52 and 59 days) with 130, 140 and 150 g of body weight, respectively, at the beginning of the laying were used. A random block design with a 32 factorial arrangement was used, taking as factors age and weight at the beginning of laying and as a block the weeks of laying (8, 11 and 17). The highest egg mass (10.72 ± 0.41 g/day/bird) was obtained when the quails started laying with 150 g of live weight.

El presente estudio tuvo como objetivo comparar el peso corporal, así como índices cardiacos, hematocrito y hemoglobina como indicadores de trabajo cardiaco de dos líneas de pavos de engorde criados a nivel del mar. Se trabajó con 35 pavos de la línea BUT y 35 de la línea Hybrid. El peso corporal (PC) se registró desde la 4ª a la 14ª semana de edad en que fueron beneficiados. En ese momento, se tomó una muestra de sangre para determinar el hematocrito y la hemoglobina; además, se extrajeron los corazones y se determinaron las relaciones de peso ventrículo derecho/ventrículo total (VD/VT), peso ventrículo izquierdo/ventrículo total (VI/VT), peso ventrículo izquierdo + septo/ ventrículo total (VI+S/VT), VI/PC, VD/PC, VI+S/PC y VT/PC. El peso corporal y la hemoglobina en pavos BUT fueron superiores (p<0.05), mientras que el hematocrito fue mayor (p<0.05) en pavos de l...

The aim of this study was to relate morphometric measurements of the Coturnix coturnix japonica quail egg with the weight at birth in a commercial line of laying. In total, 274 birds were evaluated at one-day old, whose fertile eggs were classified into three categories according to weight: (1) 10.00-10.99, (2) 11.00-11.99, (3) 12.00-12.99 g for the variable birth weight, while the variables: transverse diameter and longitudinal diameter of the egg, and shape index were evaluated according to quartiles. In addition, the sex of the bird was evaluated. A completely randomized block model and correlations between the quantitative variables were used. A mean correlation of 0.65 was obtained between egg weight and longitudinal diameter, and low correlations between the variables longitudinal and transverse diameter (0.15). The birth weight was 7.36 ± 0.038, 7.92 ± 0.036 and 8.47 ± 0.058 g ...