Comparison of sperm subpopulation structures in first and second ejaculated semen from Japanese black bulls by a cluster analysis of sperm motility evaluated by a CASA system
| Autor: | Kentaro Q. Sakamoto, Yojiro Yanagawa, Yoshiyuki Takahashi, Seiji Katagiri, Chihiro Kanno, Masashi Nagano |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Male
endocrine system Motility Semen Short length Biology Andrology 03 medical and health sciences 0302 clinical medicine spermatozoa Animals Ejaculation reproductive and urinary physiology Sperm motility 030219 obstetrics & reproductive medicine General Veterinary urogenital system bovine 0402 animal and dairy science Motile sperm computer-assisted sperm analysis 04 agricultural and veterinary sciences Note 040201 dairy & animal science Sperm Semen Analysis motility Sperm Motility Cattle Theriogenology cluster analysis |
| Zdroj: | The Journal of Veterinary Medical Science |
| ISSN: | 0916-7250 |
| Popis: | In the present study, bull sperm in the first and second ejaculates were divided into subpopulations based on their motility characteristics using a cluster analysis of data from computer-assisted sperm motility analysis (CASA). Semen samples were collected from 4 Japanese black bulls. Data from 9,228 motile sperm were classified into 4 clusters; 1) very rapid and progressively motile sperm, 2) rapid and circularly motile sperm with widely moving heads, 3) moderately motile sperm with heads moving frequently in a short length, and 4) poorly motile sperm. The percentage of cluster 1 varied between bulls. The first ejaculates had a higher proportion of cluster 2 and lower proportion of cluster 3 than the second ejaculates. |
| Databáze: | OpenAIRE |
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