Kusaka H

ORCID: 0000-0002-6745-5013 · 2 papers in corpus · active 2023
2023
Association of age at first calving with longevity, milk yield, and fertility up to the third lactation in a herd of Holstein dairy cows in Japan.
The Journal of reproduction and development ·doi:10.1262/jrd.2023-012

Accelerating age at first calving (AFC) is a strategy for sustainable dairy farming, whereas the impact of a reduction in AFC on long-term performance remains unclear. In this study, longevity and milk productivity until the end of the thir…

2023
Seasonality in resumption of ovarian activity and reproductive performance of postpartum Holstein cows.
The Journal of reproduction and development ·doi:10.1262/jrd.2022-098

It has been suggested that domestication has turned cattle from seasonal breeders to annual breeders. This study examined the seasonal differences in early postpartum ovulation and subsequent reproductive performance in 542 Holstein cows. C…