Banca de DEFESA: JENNER MENDES MUNIZ JARDIM

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JENNER MENDES MUNIZ JARDIM
DATE: 28/02/2022
TIME: 14:00
LOCAL: Videoconferência: https://meet.google.com/iaz-ccby-dkb
TITLE:

Efficiency of the male effect on primiparous goats in cyclic and acyclic

KEY WORDS:

 Goats; Reproduction; Biostimulation; Pregnancy; Prolificity.

PAGES: 62
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUBÁREA: Reprodução Animal
SUMMARY:

The efficiency of the male effect on ovarian activity, pregnancy, prolificacy and embryonic losses of cyclic (n= 40) and acyclic (n= 40) primiparous goats in the postpartum period was evaluated. The sires (n = 4) were separated from the females 30 days before starting the experiment and the cyclicity condition was evaluated by the P4 concentration before and after the introduction of males into the females' herds. On the tenth day of physical contact between males and females, an increase in P4 concentrations was observed in both groups. In the group of acyclic females, the highest (P < 0.05) concentration of estrus occurred between the 11th and 15th day of the breeding season, while in the group of cyclic females the concentration was higher (P < 0.05) between 21st and 25th day. The incidence of estrus was higher (P < 0.05) in the acyclic females group (97.50%) than in the cyclic females group (70.00%). Follicular diameter did not differ (P > 0.05) between acyclic (6.85±0.49) and cyclic (6.95±0.5) females, however, the number of double ovulations in acyclic females (69.23 %) and cyclic (60.71%) were higher (P < 0.05) than simple ovulations in acyclic (30.76%) and cyclic (39.28%). The percentages of double pregnancy in acyclic (55.00%) and cyclic (42.50%) females were higher than the single pregnancy in acyclic (35.00%) and cyclic (25.00%) females. The percentage of double parturition in acyclic (52.77%) and cyclic (55.55%) females was higher (P < 0.05) than single parturition in acyclic (25.00%) and cyclic (37.03%) females. %), but the prolificacy did not differ (P > 0.05) between acyclic (1.67) and cyclic (1.60) females. On the 30th day after mating, the number of embryos was higher (P < 0.05) in acyclic females (n = 61), but the percentage of conceptus loss was higher (P < 0.05) in acyclic females (39 .34%) than in the cyclical ones (9.09%). The results allow us to conclude that the male effect can be equally used in the breeding season of cyclic and acyclic primiparous females.

BANKING MEMBERS:
Externo à Instituição - FELIPE AUGUSTO BOUDOUX MARTINS SALES
Externo à Instituição - JOSÉ CARLOS FERREIRA DA SILVA
Presidente - 103.302.674-34 - MARCOS ANTONIO LEMOS DE OLIVEIRA - UFRPE