Calving Interval Formula
Calving interval equals to:
- Lactation period + Dry period — Correct Answer
- Lactation period + Service period
- Gestation period − Service period
- Gestation period + Service period
Explanation:
Correct Answer: Lactation period + Dry period
Calving interval = Lactation period + Dry period
From Table 11:
- Lactation period = 305 days (10 months)
- Dry period = 60 days (2 months)
- Calving interval = 305 + 60 = 365 days (12 months)
Related Terms
- Calving interval: Interval between two successive calvings of an animal (365 days ideal)
- Calving index: Average interval between two successive calvings of a herd
- Generation interval: Average age of parents when their offspring are born
Why Other Options Are Wrong
- Lactation period + Service period: Service period is 85 days post-parturient, this doesn't give calving interval.
- Gestation period − Service period: Mathematically incorrect formula.
- Gestation period + Service period: 283 + 85 = 368, close but not the standard formula.
📚 About this Topic — Animal Refresher
This multiple choice question is from Animal Refresher, Livestock Production and Management. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
