TY - JOUR
T1 - Efecto del estadio del desarrollo folicular al momento de la monta sobre la ovulación y supervivencia embrionaria en alpacas
AU - Miriam Cervantes, F.
AU - Ramos Coaguila, Olger Pedro
AU - Teodosio Huanca, M.
N1 - Publisher Copyright:
© 2007 Universidad Nacional Mayor de San Marcos. All rights reserved.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2007
Y1 - 2007
N2 - The objective of this study was to evaluate the effect of the stage of the dominant follicle (df) at mating on the ovulation and embryonic survival in alpacas. A total of 116 alpacaswith315 day-post-partum resting period were used and evaluated by transrectal ultrasonography in order to distribute them in 4 groups: G1 (df in growing stage, diameter: 6 mm), G2 (df in growing stage, diameter: 3 7 £ 12 mm), G3 (df in static stage, diameter: 37 mm,) and G4 (df in regression stage, diameter: 37 mm). Subsequently, all alpacas were mated except 5 alpacas of group G1 that rejected the male. Mating day was considered as day 0. Additional ultrasound evaluations were carried out on days 2 (occurrence of ovulation), 9 (presence and size of the corpus luteum); 20, 25, 30 and 35 (presence of embryonic vesicle orembryo). On day 15, a sexual receptiveness test was performed. Ovulation occurred in 97.3% of alpacas that were mated (n=111) but without significant differences (p<0.05) between groups. On day 9, no significant difference in the average size of the corpus luteum was observed among groups. The embryonic survival rate was also not significantly different among the groups, but there was a tendency to a greater rate of survival for group G2(65.5%) on day 35 after mating. These results suggested that the stage of follicular development of the dominant follicle during mating does not have a significant effect on the rate of ovulation and embryonic survival in alpacas.
AB - The objective of this study was to evaluate the effect of the stage of the dominant follicle (df) at mating on the ovulation and embryonic survival in alpacas. A total of 116 alpacaswith315 day-post-partum resting period were used and evaluated by transrectal ultrasonography in order to distribute them in 4 groups: G1 (df in growing stage, diameter: 6 mm), G2 (df in growing stage, diameter: 3 7 £ 12 mm), G3 (df in static stage, diameter: 37 mm,) and G4 (df in regression stage, diameter: 37 mm). Subsequently, all alpacas were mated except 5 alpacas of group G1 that rejected the male. Mating day was considered as day 0. Additional ultrasound evaluations were carried out on days 2 (occurrence of ovulation), 9 (presence and size of the corpus luteum); 20, 25, 30 and 35 (presence of embryonic vesicle orembryo). On day 15, a sexual receptiveness test was performed. Ovulation occurred in 97.3% of alpacas that were mated (n=111) but without significant differences (p<0.05) between groups. On day 9, no significant difference in the average size of the corpus luteum was observed among groups. The embryonic survival rate was also not significantly different among the groups, but there was a tendency to a greater rate of survival for group G2(65.5%) on day 35 after mating. These results suggested that the stage of follicular development of the dominant follicle during mating does not have a significant effect on the rate of ovulation and embryonic survival in alpacas.
KW - Alpaca
KW - Embryonic survival
KW - Follicular development
KW - Ovulation
KW - Ultrasonography
UR - http://www.scopus.com/inward/record.url?scp=85047138044&partnerID=8YFLogxK
M3 - Artículo
AN - SCOPUS:85047138044
SN - 1682-3419
VL - 18
SP - 122
EP - 128
JO - Revista de Investigaciones Veterinarias del Peru
JF - Revista de Investigaciones Veterinarias del Peru
IS - 2
ER -