Ciencias Agropecuarias
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Item Análisis retrospectivo de hembras bovinas sometidas a reproducción asistida por el MAGAP en la parroquia El Triunfo del cantón Pastaza entre los años 2020 y 2023(2025-02) Taipe Guanoluisa Byron Javier; Rosero Peñaherrera Marco AntonioThe main objective of this research was to retrospectively analyze the results of bovine females subjected to assisted reproduction by the MAGAP in the El Triunfo parish of the Pastaza canton between the years 2020 and 2023. The methods of artificial insemination at a fixed time (IATF) and by natural heat were evaluated in cattle of different breeds, ages and previous births. Through a statistical and descriptive analysis design, the relationship of factors such as breed, age and previous births was determined. The results obtained a total of 193 cows to which artificial insemination was applied. 25 cows were subjected to insemination with natural heat, representing 13%, and 168 cows were applied IATF, representing 87%. In the Holstein breed, 65 cows were recorded with a percentage of 33.25% for natural heat and 81.88% of IATF, with the Brown Swiss breed the data obtained that in 44 animals 29.25% is natural heat and the IATF 47.5%, for the Jersey breed it is reported of 9 cows with 0% in natural heat and 33.5 in IATF, in the Charolais breed with 32 cows it gave 0% for natural heat and 56.5% for IATF, the Norman breed records 21 cows having 8.25% of natural heat and 40% of IATF, and finally the Mestiza breed with 22 cows had 25% for natural heat and IATF of 53.25%, which demonstrated the effectiveness of IATF in all breeds. Statistically, the Chi square test shows that there is no significant relationship between the variables studied: race, age and previous births.