Effects of environmental factors, age and genotype on sperm production and semen quality in Bos indicus and Bos taurus AI bulls in Brazil
| Autor: | L. H. Rodrigues, L.A.G. Deragon, Leonardo F.C. Brito, John P. Kastelic, Flaviana Vieira, Antonio Emidio Dias Feliciano Silva |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Aging
endocrine system Genotype medicine.medical_treatment Semen Environment Biology Insemination Andrology Semen quality Endocrinology Animal science Food Animals medicine Animals Spermatogenesis Insemination Artificial reproductive and urinary physiology Sperm motility Sperm Count urogenital system Artificial insemination Temperature Humidity General Medicine Sperm humanities Sperm Motility Cattle Animal Science and Zoology Seasons Brazil |
| Zdroj: | Animal Reproduction Science. 70:181-190 |
| ISSN: | 0378-4320 |
| DOI: | 10.1016/s0378-4320(02)00009-x |
| Popis: | The effects of ambient temperature and humidity, month, age and genotype on sperm production and semen quality in AI bulls in Brazil were evaluated. Data from two consecutive years were analyzed separately. Seven Bos indicus and 11 Bos taurus bulls from one artificial insemination (AI) center were evaluated in Year 1 and 24 B. indicus and 16 B. taurus bulls from three AI centers were evaluated in Year 2. Ambient temperature and humidity did not significantly affect sperm production and semen quality, probably because there was little variation in these variables. Month accounted for less than 2% of the variation in sperm production and semen quality. Increased bull age was associated with decreased sperm motility (P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect