Banca de DEFESA: KEBB KLOBUKOSKI BORSTNEZ

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : KEBB KLOBUKOSKI BORSTNEZ
DATE: 05/08/2022
TIME: 14:00
LOCAL: Web Conferência - Google Meet - meet.google.com/dhr-qcdo-kzd.
TITLE:

Evaluation of the productive and reproductive performance of a Pulse-flow® technology for artificial insemination compared to conventional application.

KEY WORDS:

Swine reproduction; Management; Pig farming; Sows; Zootechnical indexes.

PAGES: 45
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUMMARY:

Artificial insemination (AI) is considered an essential practice for the dissemination of genetic material and achieving good reproductive rates and, despite the related advantages, there are still limitations mainly focused on the technical management and labor demanded. From this scenario, the Pulse-flow® technology was developed seeking to solve the critical points and difficulties related to the standardization of artificial insemination management. The semi-automated insemination equipment digitally operates with the deposition of semen at a frequency and pressure similar to natural mating, bringing AI closer to the female's natural reproductive physiology, improving reproductive outcomes. Thus, the objective of the present work was to compare the Pulse-flow® technology (Treatment group) of artificial insemination with the manual methodology traditionally used for AI (Control group). The experiment consisted of 455 females, with birth orders between 2 and 6, over 12 weeks. After weaning, the animals were placed in cages and distributed in the experimental groups, taking into account the calving order, number of weaners from the previous litter and the body condition score. The estrus identification was performed daily through the male tolerance reflex in the presence of the male twice a day. Females were inseminated according to the farm's artificial insemination interval protocol, using the post-cervical AI technique. For this, 233 females were inseminated with the Pulse-flow® Treatment and 222 females were inseminated in the Control group, with the inseminators and males being equally distributed between the groups. After inseminations, the variables insemination time, incidence of reflux, semen quality (bacterial growth, motility and sperm defects), calving rate, number of total births and percentage of live births were evaluated. As expected, when analyzing calving order, number of weaners from the previous litter, body condition, number of inseminations per female and males used, the results showed that there was no difference between groups (P > 0.05) denoting distribution homogeneous between treatments. Data on insemination time, presence of reflux, percentage of pregnancy, percentage of live births, stillbirths and mummifications did not show a significant difference between treatments (P > 0.05). However, for the variation of AI time, the Treatment showed less variation than the Control group (P < 0.001). For birth rates, there was a difference between the experimental groups (16.2 ± 3.5 and 17.2 ± 2.8 piglets, respectively for the Treatment and Control groups; P = 0.03). Therefore, the use of Pulse-flow® technology through the artificial insemination gun showed greater standardization in the time of artificial insemination compared to the AI methodology traditionally used, however, a decrease in the results of live births was observed, demonstrating that studies are still needed for standardization of protocols for its routine use in swine farms.

BANKING MEMBERS:
Externo à Instituição - CARLOS CABRAL - PUCMinas
Interna - 2277465 - FABIANA MOREIRA
Presidente - 286.965.078-78 - MARIANA GROKE MARQUES - EMBRAPA