Question

Given below are two statements:
Statement (I) : Duration of heat is shorter in zebu cattle as compared to European breed.
Statement (II) : The fact that heat period often occurs at night, complicates the breeding management.
In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (I) and Statement (II) are correct.
• B. Both Statement (I) and Statement (II) are incorrect.
• C. Statement (I) is correct but Statement (II) is incorrect.
• D. Statement (I) is incorrect but Statement (II) is correct.

Hint:

To catch short and quiet heat periods in Zebu herds, check the animals at least three to four times a day, particularly early in the morning and late in the evening.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Identifying when a cow is in heat (estrus) is essential for successful artificial insemination.
Estrus signs and behaviors differ between cattle species.

Step 2: Detailed Explanation:
Statement (I) examines the duration of estrus.
European cattle (Bos taurus) have an average estrus duration of \(18\) to \(24\) hours.
Zebu cattle (Bos indicus) have a much shorter heat period, typically lasting only \(10\) to \(15\) hours, and sometimes even less.
Therefore, Statement (I) is correct.
Statement (II) looks at the timing of estrus onset.
In Zebu cattle, the symptoms of estrus often begin during the cooler night-time hours (between 6:00 PM and 6:00 AM).
Because farm staff are less active at night, many of these heat periods are missed.
This makes heat detection more difficult and complicates breeding schedules.
Therefore, Statement (II) is correct.

Step 3: Final Answer:
Both Statement (I) and Statement (II) are correct.