Influência da dificuldade de inseminação, temperamento e cortisol plasmático sobre a taxa de concepção de vacas e novilhas da raça Nelore inseminadas em tempo fixo

Oliveira, Letícia Zoccolaro; Silva, A.G.; Noronha, Isabella M.; Oliveira, C. S.; Monteiro, Fábio Morato; Peres, R. F. G.; Graff, H. B.; Rodrigues, A. L. R.; Brandão, Felipe Zandonadi

doi:10.1590/1678-4162-10478

Cited by 1 publication

(3 citation statements)

References 25 publications

(12 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Oliveira et al (2019) stress parameters such as insemination difficulty and temperament did not influence cows and heifers submitted to FTAI, a result similar to that observed in this study. However, according to the authors, the lower fertility in the FTAI was suggested in animals in which greater difficulty and/or time needed to complete the AI was observed.…”

Section: Discusionsupporting

confidence: 89%

“…Insemination difficulty (ID) was assessed by the technician while performing the management, attributing a score from 1 to 3 (1 = low difficulty and 3 high difficulty) to the animal according to its difficulty in performing the cervix transposition technique (Oliveira et al 2019).…”

Section: Methodsmentioning

confidence: 99%

“…The insemination time (IT) was determined using a digital stopwatch, starting at the time of insertion of the semen applicator in the female's vaginal vestibule and ending at the time of removal of the applicator from the reproductive tract (without the presence of semen), as proposed by Oliveira et al (2019). The IT was classified into 4 intervals given in seconds, namely: ≤10; 11 to 20; 21 to 30 and ≥31 seconds.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Environmental and behavioral effects on pregnancy rate of Nellore cows synchronized to fixed-time artificial insemination protocol: multivariate analysis

Dos Santos,

De Resende,

De Arruda

et al. 2023

OLEL

View full text Add to dashboard Cite

The aim of the study was to evaluate the influence of behavioral reactivity, body condition score (BCS), corral temperature (CT), difficulty and time of insemination on pregnancy rate of Nellore females raised in the Pantanal area and submitted to a fixed-time artificial insemination (FTAI) protocol. Thus, 167 females, kept in an extensive grazing system were evaluated. The variables recorded were BCS, escape velocity (EV), CT, insemination difficulty (ID), chute behavior (CB), insemination time (IT) and pregnancy rate. Initially, Fisher's Exact Test was performed to verify differences between expected and observed for BCS, CB, EV, ID, IT and CT, in which the influence of each variable on pregnancy rate was individually analyzed and it was not significant influence of these variables was observed (P<0.05). Subsequently, the result of the pregnancy diagnosis (success = 1 and failure = 0) was used to study the probability of pregnancy. Multivariate analysis was used to assess the influence of several characteristics together on the conception rate, creating different evaluation scenarios. In none of the scenarios extracted from the cluster analysis was there a statistically relevant influence on the number of pregnancies. Under the conditions in which the study was conducted, there was no influence of corral temperature, reactivity, time and difficulty of insemination, body condition score and animal category on pregnancy rate of bovine females submitted to a FTAI protocol.

show abstract

Section: Discusionsupporting

confidence: 89%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation