This study aimed to evaluate the efficiency of embryo recovery in single ovulation, the quality of the embryos and the interspecies fertility through embryo transfer. Nine donor alpacas and 40 recipient llamas were used. Ultrasonography of the ovaries was done to determine the presence of an ovulatory follicle. Donors were naturally mated and washing of uterine horns was performed at 7 days post-breeding. After collecting the embryos, cloprostenol was injected to donors to induce luteolisis and reinitiate a new follicular wave. Four washes were performed with intervals of 15 days. The transfer of fresh embryos was done on day 7 (group 1) or 6 (group 2) after the induction of ovulation with buserelin to the recipients. The results showed that 58.3% of embryos were collected. Among them, 57.2, 23.8 and 19.0% were of grade 1, 2 and 3 respectively. None embryos were of grade 4. Fertility on ...

El presente estudio tuvo como objetivo evaluar la eficiencia de recuperación de embriones de ovulación simple, la calidad de los embriones y la fertilidad de la transferencia embrionaria interespecie. Se utilizaron 9 alpacas donadoras y 40 llamas receptoras. Se les hizo el seguimiento ecográfico para determinar la presencia de folículos ovulatorios. Las donadoras fueron cubiertas mediante monta natural y el lavado de los cuernos uterinos se realizó a los 7 días de la cópula. Luego del lavado uterino se aplicó cloprostenol a las donadoras para inducir luteólisis y reiniciar una nueva onda folicular. Se realizaron cuatro lavados con un intervalo de 15 días entre lavados. Las transferencias de los embriones se hicieron en el día 7 (grupo I) y 6 (grupo II) pos-inducción de la ovulación con buserelina a las receptoras. Se recolectó el 58.3% de los embriones. El 57.2, 23.8 y 19.0...

The aim of this study was to determine the correlation between the staple strength and the textile characteristics of black and brown fibres, as well as to evaluate the influence of colour, breed, location, age, and sex of alpaca on the staple strength properties. Staple strength was measured with the Staple Length & Strength instrument. Fibre characteristics were measured using an Optical-based Fibre Diameter Analyzer (OFDA 2000). Data did not show a normal distribution, as verified by the Shapiro-Wilk normality test. Spearman’s rank correlation coefficients between staple strength and fibre textile characteristics were calculated. The influence of colour, breed, location, age, and sex of alpacas on the staple strength properties were analysed separately by the Kruskal-Wallis rank sum test (α=0.05). The highest correlation was observed between peak force position and staple lengt...

Se estudió el efecto de dosis de gonadotropinas sobre la superovulación en alpacas, también la colección de embriones a diferentes periodos post monta natural. El estudio se realizó en la estación de investigaciones de Maranganí-La Raya, del IVITA (Instituto Veterinario de Investigaciones Tropicales y de Altura), ubicado en Cuzco, a 4200 msnm, 71º latitud sur y 71º longitud oeste; se usaron hembras adultas (3 a 6 años de edad) de la raza Huacaya, que estaban en celo y que al examen ovárico por ultrasonografía, tenían folículos menores de 7 mm de diámetro. Los tratamientos fueron: Tl) n = 6; día 0: 750 ui, im de eCG; día 5: 750 ui, im de hCG, T2) n = 6; día 0: 500 ui, im de eCG; día 5: 750 ui, im de hCG y T3) n = 6; día 0: 750 ui, im de eCG; día 5: 1000 ui, im de hCG. En los tres casos las hormonas fueron inyectadas a las 7:00 horas y las hembras fueron servidas con m...

Se estudió el efecto de dosis de gonadotropinas sobre la superovulación en alpacas, también la colección de embriones a diferentes periodos post monta natural. El estudio se realizó en la estación de investigaciones de Maranganí-La Raya, del IVITA (Instituto Veterinario de Investigaciones Tropicales y de Altura), ubicado en Cuzco, a 4200 msnm, 71º latitud sur y 71º longitud oeste; se usaron hembras adultas (3 a 6 años de edad) de la raza Huacaya, que estaban en celo y que al examen ovárico por ultrasonografía, tenían folículos menores de 7 mm de diámetro. Los tratamientos fueron: Tl) n = 6; día 0: 750 ui, im de eCG; día 5: 750 ui, im de hCG, T2) n = 6; día 0: 500 ui, im de eCG; día 5: 750 ui, im de hCG y T3) n = 6; día 0: 750 ui, im de eCG; día 5: 1000 ui, im de hCG. En los tres casos las hormonas fueron inyectadas a las 7:00 horas y las hembras fueron servidas con m...

El objetivo del presente estudio fue identificar los agentes bacterianos aislados y evaluar su susceptibilidad antibiótica a partir de casos de mortalidad en cuyes procedentes de dos centros de crianza familiar-comercial de la provincia de Canchis, Cusco. Se procesaron 230 animales (130 con lesiones respiratorias y 100 con lesiones enterohepáticas), tomándose muestras de hígado, pulmón, bazo e intestino. Se realizó un cultivo microbiológico y antibiograma en agar con discos de los principales antibióticos usados en sistemas de crianza de cuyes. A nivel de lesiones respiratorias se identificó a Streptococcus sp (47.1%), Bordetella sp (26.4%), Salmonella sp (13.8%), Klebsiella sp (9.2%) y Pasteurella sp (3.4%). Asimismo, en cuyes con lesiones entéricas se identificó a Salmonella sp (56.8%), E. coli (29.7%), Citrobacter sp (7.6%) y Klebsiella sp (5.9%). La mayor frecuencia de ais...

Introduction: The textile industry considers alpaca fiber to be a specialty fiber. The aim of this study was to evaluate the influence of color, breed, location, age, and sex of alpacas on fiber quality characteristics and staple length.Methods: Fiber samples were taken from the mid-side of 118 Huacaya and Suri alpacas at two livestock shows (Pitumarca and Maranganí) and at CICAS La Raya (South American Camelid Research Center), which is located in the province of Canchis (Cusco, Peru).Results and discussion: The fiber characteristics and staple length in black alpacas are similar to those of brown alpacas. Huacaya fiber is finer, having a lower mean fiber diameter (MFD), SD, and coefficient of variation of MFD than Suri fiber. Alpacas from the two livestock shows have higher-quality fiber than unselected alpacas raised in CICAS La Raya. Staple length is longer in Suri alpacas than in H...

The aim of this study was to determine some reproductive parameters (gestation rate, number of young, age distribution and reproductive age) of female vicuñas in two management systems: wild and captivity, in the Cusco Region, Peru. The capture of the animals ("Chaccus") were carried out between May and August 2017. The pregnancy was determined by transrectal ultrasound in 143 females, the presence of offspring by observing functional udder in the females, the age distribution and reproductive age by means of the records of capture and observation of the dentition. The percentage of gestation was of 74.6 and 79.4% for the wild and captivity systems, respectively. In the juvenile population were pregnant 29.9 and 4.4% in the wild and in captivity, respectively. The number of young animals in the wild was 36% and in captivity 53%. The proportion of young vicuñas was similar in both manag...

The aim of this study was to determine some reproductive parameters (gestation rate, number of young, age distribution and reproductive age) of female vicuñas in two management systems: wild and captivity, in the Cusco Region, Peru. The capture of the animals ("Chaccus") were carried out between May and August 2017. The pregnancy was determined by transrectal ultrasound in 143 females, the presence of offspring by observing functional udder in the females, the age distribution and reproductive age by means of the records of capture and observation of the dentition. The percentage of gestation was of 74.6 and 79.4% for the wild and captivity systems, respectively. In the juvenile population were pregnant 29.9 and 4.4% in the wild and in captivity, respectively. The number of young animals in the wild was 36% and in captivity 53%. The proportion of young vicuñas was similar in both manag...