Browsing by Author "Jacho Guanoluisa, Iván Alejandro"

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    Análisis comparativo de la cinética espermática pos descongelación en líneas porcinas maternales y finalizadoras mediante el sistema de evaluación computarizada CASA
    (Universidad Técnica de Cotopaxi (UTC). Ciencias Agropecuarias y Recursos Naturales. Medicina Veterinaria, 2026-10-19) Álvarez Quilligana, Emily Camila; Jacho Guanoluisa, Iván Alejandro; Veloz Veloz, Dina Maricela
    Semen cryopreservation is a relevant tool for preserving porcine genetic resources; however, the freezing and thawing process can alter sperm motility and trajectory. Therefore, this study aimed to compare post-thaw sperm kinetics between maternal and terminal pig lines using the iSperm CASA system. A quantitative, descriptive, and comparative study was conducted with eight semen samples, four from each line, in which progressive motility, non-progressive motility, static spermatozoa, and kinetic indices related to trajectory straightness, linearity, and wobble were evaluated. Maternal lines recorded mean values of 26.25% progressive spermatozoa, 48.75% non-progressive motile spermatozoa, and 25.00% static spermatozoa, whereas terminal lines presented 21.00%, 37.25%, and 41.75%, respectively. Maternal lines showed descriptively higher mean STR and LIN values, with 61.17% and 28.74%, while WOB reached 44.18% in terminal lines; however, the Mann–Whitney U test did not identify statistically significant differences for STR, LIN, or WOB, with p-values above 0.05. It was concluded that maternal lines retained a descriptively more favorable distribution of motile sperm subpopulations, although the post-thaw response showed individual variability and did not allow the kinetic indices to be attributed exclusively to the genetic orientation of the line.