The purpose of this study is to evaluate the phenotypic characteristics and typification of Creole goats in five localities of the Ayacucho region in south-central Peru. Materials and Methods: Data from 149 goats (25 males and 124 females) were collected, excluding animals under 2 years of age, pregnant, and sick. Seven qualitative characteristics and 11 zometric measurements were evaluated, and then 9 zometric indices were estimated. Results: In the region, goats with composite colors predominated (76.50%). Additionally, supernumerary (24.20%) and divergent teats (22.60%) were observed in females, while males exhibited a scrotal bifurcation (32.00%). The origin of the flock had a significant effect (p < 0.05) on body measurements, as well as on pelvic index, transverse pelvic index, longitudinal pelvic index, compactness index, and load cannon bone index, except for body index (BOI), pr...

El presente trabajo de investigación se desarrolló con el objetivo de evaluar el efecto de dos agentes capacitantes en el medio de fertilización para la producción in vitro de embriones en alpacas (Vicugna pacos). Los ovarios se obtuvieron del matadero municipal de Pilpichaca (Huancavelica) y fueron transportados en SSF al 0.9%, más gentamicina a una temperatura de 37°C. De los 227 ovarios recolectados se recuperaron 1132 ovocitos viables, con una media de recuperación de 5.00 ± 0.42 ovocitos viables/ovario. Los ovocitos seleccionados fueron de calidad I, II y III, luego puestos a maduración en medio TCM-199 por 34 a 36h. Los ovocitos maduros se distribuyeron de forma aleatoria en cuatro tratamientos de medio de fertilización suplementados con heparina al 2% y PHE (2mM de Penicilamina, 1mM de Hipotaurina y 250mM de epinefrina), según la siguiente distribución: T1=Control; T2=...

Articulo científico

This study assessed the prevalence and risk factors associated with gastrointestinal parasite infection in goats in Ayacucho, Peru. Fecal samples were collected from a total of 254 goats from four districts of Ayacucho: Ocaña (89), Colca (76), Pacaicasa (64), and Luricocha (25) during the dry season; recording the location, sex, and age of the animals. The fecal samples were analyzed using the flotation technique in salt and sugar solution, and modified McMaster egg counting techniques for eggs/oocysts (epg/opg) of gastrointestinal parasites. The associations between location, sex, and age with the prevalence of gastrointestinal parasites were analyzed using the chi-square test. Fecal samples showed an overall parasite prevalence of 87.80%. The identified parasites were Eimeria spp. (86.22%), Strongyle type eggs (STE) (65.75%), Skrjabinema spp. (7.87%), Trichuris spp. (3.15%) and Moniez...

Articulo científico

El presente estudio tuvo como objetivo evaluar el efecto de la heparina y PHE (penicilamina, hipotaurina y epinefrina) en el medio de fecundación en la producción in vitro de embriones en alpacas. Los ovarios fueron transportados en solución salina fisiológica al 0.9% con gentamicina a 37°C durante 3 horas. Se utilizaron 227 ovarios, recuperándose 1132 ovocitos de calidad I, II y III; y madurados in vitro por 34h. Los ovocitos maduros se distribuyeron de forma aleatoria en cuatro tratamientos de medio de fecundación, las cuáles fueron suplementados con heparina al 2% y PHE según la siguiente distribución: T1=Control; T2=Heparina; T3=PHE; T4=PHE + heparina. Luego se añadió 1x106 espermatozoides/ml seleccionados por el método gradiente de Percoll (45/90%) e incubados por 18 h. Finalmente se cultivaron en medio de cultivo SOF durante 7 días. Los porcentajes de clivaje a las 24...

The purpose of this study is to evaluate the phenotypic characteristics and typification of Creole goats in five localities of the Ayacucho region in south-central Peru. Materials and Methods: Data from 149 goats (25 males and 124 females) were collected, excluding animals under 2 years of age, pregnant, and sick. Seven qualitative characteristics and 11 zometric measurements were evaluated, and then 9 zometric indices were estimated. Results: In the region, goats with composite colors predominated (76.50%). Additionally, supernumerary (24.20%) and divergent teats (22.60%) were observed in females, while males exhibited a scrotal bifurcation (32.00%). The origin of the flock had a significant effect (p < 0.05) on body measurements, as well as on pelvic index, transverse pelvic index, longitudinal pelvic index, compactness index, and load cannon bone index, except for body index (BOI), pr...

recording the location, sex, and age of the animals. The fecal samples were analyzed using the flotation technique in salt and sugar solution, and modified McMaster egg counting techniques for eggs/oocysts (epg/opg) of gastrointestinal parasites. The associations between location, sex, and age with the prevalence of gastrointestinal parasites were analyzed using the chi-square test. Fecal samples showed an overall parasite prevalence of 87.80%. The identified parasites were Eimeria spp. (86.22%), Strongyle type eggs (STE) (65.75%), Skrjabinema sp. (7.87%), Trichuris sp. (3.15%) and Moniezia spp. (3.15%). There was no significant association between the location and the presence of parasites (p<0.05), however, there was a higher prevalence and parasite variety in Luricocha. Sex and age did not have a significant association with parasitosis (p>0.05), except in prevalences of Trichurisspp....

The aim of this study was to evaluate the effect of collagenase, pipetting and incubation to reduce the filancia of semen and its relationship with sperm quality in alpacas for its cryopreservation. Semen samples were obtained by artificial vagina from 4-7-year-old males at the Reproductive Biotechnology Laboratory of the Canaán Agrarian Experimental Station of INIA (Ayacucho, Peru). The macroscopic (volume, pH and filancia) and microscopic (motility, concentration and vitality) characteristics of the semen were evaluated. Each sample was distributed in three aliquots and diluted with the commercial AndroMed® extender in a 1:1 ratio at 37 °C and subjected to three treatments: T1 = Collagenase 5%; T2 = Pipetting 10 times, and T3 = Incubation at 37 °C for 10 min. The microscopic characteristics were evaluated at 0, 20, 40, 60 and 120 min post-dilution). The filancia decreased signifi...

El estudio tuvo como objetivo evaluar el efecto de la colagenasa, pipeteo e incubación para disminuir la filancia del semen y su relación con la calidad espermática en alpacas para su criopreservación. Las muestras de semen se obtuvieron por vagina artificial de machos de 4-7 años en el Laboratorio de Biotecnología Reproductiva de la Estación Experimental Agraria Canaán del INIA (Ayacucho, Perú). Se evaluó las características macroscópicas (volumen, pH y filancia) y microscópicas (motilidad, concentración y vitalidad) del semen. Cada muestra se distribuyó en tres alícuotas y diluida con dilutor comercial AndroMed® en proporción de 1:1 a 37 °C y distribuidas en tratamientos: T1=Colagenasa al 5%; T2=Pipeteo 10 veces y T3=Incubación a 37 °C durante 10 min. Las características microscópicas se evaluaron a los 0, 20, 40, 60 y 120 min pos-dilución. La filancia disminuyÃ...

El objetivo del presente estudio fue determinar el comportamiento productivo en cuyes (Cavia porcellus) machos de la raza Perú bajo tres sistemas de alimentación en condiciones de la sierra de Apurímac, Perú. Se empleó 45 cuyes machos de raza Perú destetados a los 12 días. Los cuyes se distribuyeron en forma aleatoria en tres tratamientos: T1 = alfalfa (Medicago sativa), T2 = balanceado + agua, y T3 = balanceado + alfalfa. El valor nutricional del alimento balanceado empleado para la fase de inicio fue: 16,32% proteína con 2984,45 kcal/kg de energía; y para la fase de acabado fue: 13,09% proteína con 3197.00 kcal/kg de energía. La ganancia de peso fue de 12,39, 9,02 y 12,47 g/d, para T1, T2 y T3, respectivamente (p ˂ 0,05). El peso al beneficio fue de 876,65, 714,65 y 879,91 g, para T1, T2 y T3, respectivamente y el rendimiento de carcasa fue de 61,85, T2= 61,89 y 62,78%, par...

Background and Aim: Characterizing local animal production systems is crucial for sustainable livestock development. This study aimed to characterize the diversity of goat production systems in the Highlands of Chincha province, Ica, Peru. Materials and Methods: A structured questionnaire was used to gather data from 82 goat breeders in three districts: San Juan de Yanac, San Pedro de Huacarpana, and Chavín. Factor analysis of mixed data and hierarchical classification analysis were conducted to identify typologies of goat production systems using R version 4.4.2. Results: Four distinct goat production types were identified, primarily differentiated by feeding location and deworming frequency. Type 2 (41.5%) was the most prevalent, characterized by grazing on breeders own land, minimal milk production (<1 liter/day, 91.2%), and a focus on cheese and goat kid sales (70.6%). Breeders were...

Background: Creole goat husbandry for milk and meat improves food security in rural areas in Perú. Body weight (BW) is a key trait for selecting breeding stock, and it is estimated to be using algorithms. Likewise, BW is common in livestock farming. Aim: This study aimed to compare BW prediction models using a data mining algorithm in Creole goats, considering their biometric measurements. Methods: Data from 1,075 females aged between 1 and 4 years were used. Measurements of chest width, thoracic perimeter, wither height, sacrum height, rump width and length, body length, cannon bone perimeter, age, and region of the herd were recorded. The regression trees (classification and regression tree), support vector regression (SVR), and random forest regression (RFR) algorithms were used. Results: The SVR was better at predicting BWs in Creole goat herds. Similarly, the results were stable du...