Resumen

VILLA-DUQUE, Norberto; VALENCIA-GIRALDO, Julián A.; GOMEZ-LONDONO, Germán  y  HENAO-URIBE, Francisco J.. The effect of errors regarding frozen semen insemination on bovine sperm morphophysiology. Orinoquia [online]. 2016, vol.20, n.1, pp.46-55. ISSN 0121-3709.

This work evaluated cryopreservation at -196°C, thawing and semen insemination in 32 bovine herds from the center of Colombia; it also studied, in vitro, the effect of the errors found regarding membrane integrity and sperms morphology. A specific form was used for collecting information from farms. The in vitro study was carried out at the Universidad de Caldas’ Agricultural Biotechnology Institute (Instituto de Biotecnología Agropecuaria, Manizales, Colombia); it consisted of using commercial 0.5 ml straws (30x106 epzs) containing sperm from Holstein, Jersey and Brown Swiss bulls, comparing conventional handling technique to five modifications of it (most frequent errors) using a completely randomised 6x3 factorial design. Artificial insemination (AI) was not used correctly on any of the farms evaluated here. The most frequently occurring errors were deterioration of external structure and inadequate storage conditions for the tanks, storing straws in the bucket and manipulating straws outside the tank neck, thawing in the armpit, in refrigerated water and in non-potable water. Acrosome integrity  artificial insemination, semen preservation. (AsI) and sperm membrane integrity (SMI) were affected (p<0.05) by genotype x handling technique interaction. Sperm membrane resistance was affected (p<0.01) by genotype and handling technique. Brown Swiss semen thawed in the armpit and stored with low nitrogen level had the lowest values for membrane integrity and resistance. In spite of cytoplasmic droplet and coiled tail percentages being greater than expected (<7% and <11.3%, respectively), normal sperm percentage was always above 70%, indicating that none of the factors evaluated here decisively affected sperm morphology.

Palabras clave : semen analysis; bovine spermatozoa.

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