The periodicity and duration of oestrus in zebu and grade cattle
Records are given for 1130 oestrous cycles in zebus and 678 cycles in grades. The mean length was 23·03 days in zebus and 22·42 days in grades. The mean duration of oestrus was 4·78 hr. in zebus. 7·40 hr. in grades. Neither exposure to additional light at night nor feeding a supplementary ration had...
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| Format: | Journal Article |
| Language: | Inglés |
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Cambridge University Press
1944
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| Online Access: | https://hdl.handle.net/10568/66719 |
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