Using Genomics to Measure Phenomics: Repeatability of Bull Prolificacy in Multiple-Bull Pastures

Arginase status in bull reproductive system

Penile fibrosarcoma tumor in a bull

This is a report of a penile fibrosarcoma in a two-year-old crossbred Holstein bull. The ulcerated tumormass with dimensions of 7 × 9 × 6.5 cm, was enveloped the glans and body of the penis. It had a white-graycolor at cross section appearance. There was no metastatic evidence of regional lymph node enlargement.Histopathologically, elongated spindle-shaped cells arranged densely in the interwov...

Study of Bull Spermatozoa

The electron microscope has been used to determine the characteristic dimensions and the distribution of the dry mass in bull spermatozoa. The most important result is that all characteristic data are occurring in logarithmic distributions. Furthermore, no correlation between such parameters as head weight and tail weight or head length and tail length was found. The occurrence in logarithmic d...

Sperm Characteristics in Cryopreserved Buffalo Bull Semen and Field Fertility

Semen quality and its relationship to fertility are major concern in animal production. The aim of this study was to assess the relationship between frozen thawed sperm characteristics and fertility following in vivo fertility through Artificial Insemination(AI). Semen samples were collected from four buffalo bulls. Semen volume and sperm concentration appeared to be significantly different (P0...

Bull Management and Nutrition