Tasa De Ovulación Utilizando Liberador De Gonadotropinas Y Plasma Seminal en Alpacas Y Llamas

Abstract

RESUMENSe trabajó con 93 alpacas y 92 llamas a fin de determinar el porcentaje de ovulación utilizando GnRH (buserelina) y plasma seminal de alpaca como inductor de ovulación en alpacas y llamas. Los animales se distribuyeron en dos grupos, un grupo tratado con 42 µg de buserelina intramuscular y otro grupo tratado con 1 ml de plasma seminal intramuscular (50/50% de plasma seminal y PBS + antibióticos). La tasa de ovulación fue de 78.7 y 88.9% en alpacas y 80.6 y 70.0 en llamas con buserelina y plasma seminal, respectivamente, no encontrándose diferencias estadísticas entre tipo de inductor, ovario con presencia de folículo preovulatorio o especie.Palabras clave: ovulación, buserelina, plasma seminal, alpacas, llamas ABSTRACTThe aim of the present study was to determine the ovulation rate using GnRH (buserelin) and seminal plasma of alpaca as ovulation inductors in alpacas and llamas. For this, 93 alpacas and 92 llamas were distributed in two groups: a group treated with buserelin (42 µg) IM, and a group treated with 1 ml of seminal plasma IM (50/50% seminal plasma of alpaca and PBS + antibiotics). The ovulation rate was 78.7 and 88.9% in alpacas and 80.6 and 70.0% in llamas using buserelin and seminal plasma respectively; and without statistical differences due to type of ovulation inductor, ovary carrying the preovulatory follicle or species.

Caracterización ultrasonográfica modo-B y Doppler del cuerpo lúteo en llamas

“…In B-mode ultrasonography of the CL in recipient llamas show morphometric characteristics such as area, volume and diameter highly related to studies on follicular dynamics in llamas specifically with sizes of donor follicles reaching diameters of 10.0±2.0 mm and 11.8±1.6 mm respectively 3,27 , the maximum follicular diameter is related to the future diameter of the CL since these follicles have active angiogenesis after theca formation, which promotes the permeability of blood vessels, ovulation and subsequent formation of the CL 28 , in cows for meat and milk production, ovulation of a preovulatory follicle of greater diameter leads to a CL of good size; this characteristic seems to be associated with fertility 29,30 . The diameter of the CL of the llamas was 12.7±1.7 mm, compared to other studies, are similar to those reported at 7 days post hormone application reaching diameters of 12.3±0.6 mm, 10.4±0.4 mm, 11±1.9, 11.19±0.32 mm [31][32][33] . While the area of the CL was 0.119±0.03 cm 2 and the volume of the CL evaluated was 0.84±0.34 cm 3 , these being the first results reported with various morphometric measurements of the CL and their correlation between them in llamas by US.…”

Caracterization ultrasonographic B-mode and Doppler of the corpus luteum in llamas

“…In B-mode ultrasonography of the CL in recipient llamas show morphometric characteristics such as area, volume and diameter highly related to studies on follicular dynamics in llamas specifically with sizes of donor follicles reaching diameters of 10.0±2.0 mm and 11.8±1.6 mm respectively 3,27 , the maximum follicular diameter is related to the future diameter of the CL since these follicles have active angiogenesis after theca formation, which promotes the permeability of blood vessels, ovulation and subsequent formation of the CL 28 , in cows for meat and milk production, ovulation of a preovulatory follicle of greater diameter leads to a CL of good size; this characteristic seems to be associated with fertility 29,30 . The diameter of the CL of the llamas was 12.7±1.7 mm, compared to other studies, are similar to those reported at 7 days post hormone application reaching diameters of 12.3±0.6 mm, 10.4±0.4 mm, 11±1.9, 11.19±0.32 mm [31][32][33] . While the area of the CL was 0.119±0.03 cm 2 and the volume of the CL evaluated was 0.84±0.34 cm 3 , these being the first results reported with various morphometric measurements of the CL and their correlation between them in llamas by US.…”